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NARROW
Format
Article Type
Journal
Publisher
Section
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
-
Africa
-
Nile River (1)
-
North Africa
-
Atlas Mountains
-
Moroccan Atlas Mountains
-
Anti-Atlas (1)
-
-
-
Morocco
-
Bou Azzer (1)
-
Moroccan Atlas Mountains
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Anti-Atlas (1)
-
-
-
-
Nubian Shield (2)
-
Southern Africa
-
Barberton greenstone belt (1)
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Namibia (1)
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South Africa (1)
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Swaziland (2)
-
-
West African Craton (2)
-
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Altiplano (1)
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Arctic region
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Svalbard
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Spitsbergen (1)
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-
-
Asia
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Arabian Peninsula
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Arabian Shield (2)
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Oman (1)
-
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Far East
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China
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Sulu Terrane (2)
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-
-
Himalayas
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High Himalayan Crystallines (1)
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Indian Peninsula
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India
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Ghats
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Eastern Ghats (1)
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Pakistan (1)
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Middle East
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Iran (1)
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Israel (1)
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Jordan (1)
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Turkey
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Anatolia (1)
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-
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Sri Lanka (1)
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Canada
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Eastern Canada
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Ontario
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Sudbury District Ontario (1)
-
-
-
-
Chugach Terrane (1)
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Europe
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Alps
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Eastern Alps (1)
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Carpathians
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Matra Mountains (1)
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Central Europe
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Bohemian Massif (1)
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Germany
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Bavaria Germany (2)
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Eifel (1)
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Rhineland-Palatinate Germany
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Laacher See (1)
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-
-
Hungary
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Matra Mountains (1)
-
-
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Rhenish Schiefergebirge
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Eifel (1)
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-
Southern Europe
-
Greece
-
Greek Aegean Islands
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Cyclades
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Syros (1)
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-
-
-
Iberian Peninsula
-
Iberian Massif (2)
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Ossa-Morena Zone (1)
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Spain
-
Galicia Spain
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Cabo Ortegal Complex (1)
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-
-
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Italy
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Sardinia Italy (2)
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-
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Variscides (3)
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Western Europe
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France
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Paris Basin (1)
-
-
-
-
Mediterranean region
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Aegean Islands
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Greek Aegean Islands
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Cyclades
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Syros (1)
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-
-
-
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Mediterranean Sea
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East Mediterranean
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Levantine Basin (1)
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-
-
Mexico
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Guerrero Mexico (1)
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Guerrero Terrane (1)
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North America
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Canadian Shield
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Southern Province (1)
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Yakutat Terrane (1)
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Pacific Ocean
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East Pacific
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Northeast Pacific
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Gulf of Alaska (1)
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-
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North Pacific
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Northeast Pacific
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Gulf of Alaska (1)
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-
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South Pacific (1)
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-
South America
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Bolivia (1)
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United States
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Alaska
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Prince William Terrane (1)
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Colorado
-
San Juan volcanic field (1)
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-
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commodities
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metal ores
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arsenic ores (1)
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cobalt ores (1)
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copper ores (1)
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gold ores (2)
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nickel ores (1)
-
-
mineral deposits, genesis (3)
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mineral exploration (2)
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petroleum (1)
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-
elements, isotopes
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boron
-
B-11/B-10 (1)
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-
carbon
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C-13/C-12 (1)
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halogens
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fluorine (1)
-
-
isotope ratios (12)
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isotopes
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radioactive isotopes
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Sm-147/Nd-144 (1)
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-
stable isotopes
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B-11/B-10 (1)
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C-13/C-12 (1)
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Hf-177/Hf-176 (8)
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Nd-144/Nd-143 (1)
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O-18/O-16 (1)
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Sm-147/Nd-144 (1)
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Sr-87/Sr-86 (2)
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-
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Lu/Hf (7)
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metals
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actinides
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uranium (2)
-
-
alkaline earth metals
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barium (1)
-
strontium
-
Sr-87/Sr-86 (2)
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-
-
copper (1)
-
hafnium
-
Hf-177/Hf-176 (8)
-
-
platinum group
-
palladium (1)
-
-
rare earths
-
neodymium
-
Nd-144/Nd-143 (1)
-
Sm-147/Nd-144 (1)
-
-
samarium
-
Sm-147/Nd-144 (1)
-
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scandium (1)
-
ytterbium (1)
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oxygen
-
O-18/O-16 (1)
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geochronology methods
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(U-Th)/He (2)
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Ar/Ar (4)
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Lu/Hf (7)
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radiation damage (1)
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Re/Os (2)
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Sm/Nd (1)
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thermochronology (2)
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U/Pb (32)
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geologic age
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Cenozoic
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Quaternary
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Tertiary
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Neogene
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Miocene (3)
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Paleogene
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Oligocene
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Fish Canyon Tuff (1)
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Paleocene
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upper Paleocene (1)
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-
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Mesozoic
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Cretaceous
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Lower Cretaceous
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Cadomin Formation (1)
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Urgonian (1)
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Upper Cretaceous (1)
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Jurassic
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Middle Jurassic (1)
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Triassic (2)
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Paleozoic
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Carboniferous
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Tournaisian (1)
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-
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Pennsylvanian (1)
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Upper Carboniferous (1)
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Devonian
-
Lower Devonian
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Emsian (1)
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-
Old Red Sandstone (1)
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-
Ordovician (3)
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Permian (2)
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Silurian (1)
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Phanerozoic (1)
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Precambrian
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Archean
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Fig Tree Group (1)
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Paleoarchean (1)
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Hadean (1)
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upper Precambrian
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Proterozoic
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Mesoproterozoic (3)
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Neoproterozoic
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Ediacaran (2)
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Vendian (1)
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Paleoproterozoic
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Cobalt Group (1)
-
-
-
-
-
Saxothuringian (1)
-
-
igneous rocks
-
igneous rocks
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plutonic rocks
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granites
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aplite (1)
-
-
pegmatite (2)
-
-
volcanic rocks
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adakites (1)
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basalts (1)
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phonolites (1)
-
pyroclastics
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ignimbrite (2)
-
tuff (1)
-
-
-
-
ophiolite (1)
-
-
metamorphic rocks
-
metamorphic rocks
-
amphibolites (1)
-
eclogite (4)
-
gneisses (2)
-
metasedimentary rocks
-
metapelite (1)
-
-
migmatites
-
anatexite (1)
-
-
schists
-
blueschist (1)
-
-
-
ophiolite (1)
-
-
minerals
-
carbonates
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calcite (2)
-
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halides
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fluorides
-
fluorite (1)
-
-
-
oxides
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niobates
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columbite (1)
-
-
rutile (1)
-
-
phosphates
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apatite (3)
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beraunite (1)
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monazite (1)
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strengite (1)
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torbernite (1)
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vivianite (1)
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wavellite (1)
-
-
silicates
-
chain silicates
-
amphibole group
-
clinoamphibole
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glaucophane (1)
-
-
-
pyroxene group
-
clinopyroxene
-
omphacite (1)
-
-
-
-
framework silicates
-
feldspar group
-
alkali feldspar
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sanidine (1)
-
-
-
silica minerals
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coesite (1)
-
-
-
orthosilicates
-
nesosilicates
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garnet group (2)
-
titanite group
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titanite (2)
-
-
zircon group
-
zircon (20)
-
-
-
sorosilicates
-
epidote group
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allanite (1)
-
-
-
-
sheet silicates
-
clay minerals
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kaolinite (1)
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nontronite (1)
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smectite (1)
-
-
mica group
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phengite (1)
-
-
serpentine group
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serpentine (1)
-
-
-
-
sulfides (1)
-
uranium minerals (2)
-
-
Primary terms
-
absolute age (27)
-
Africa
-
Nile River (1)
-
North Africa
-
Atlas Mountains
-
Moroccan Atlas Mountains
-
Anti-Atlas (1)
-
-
-
Morocco
-
Bou Azzer (1)
-
Moroccan Atlas Mountains
-
Anti-Atlas (1)
-
-
-
-
Nubian Shield (2)
-
Southern Africa
-
Barberton greenstone belt (1)
-
Namibia (1)
-
South Africa (1)
-
Swaziland (2)
-
-
West African Craton (2)
-
-
Arctic region
-
Svalbard
-
Spitsbergen (1)
-
-
-
Asia
-
Arabian Peninsula
-
Arabian Shield (2)
-
Oman (1)
-
-
Far East
-
China
-
Sulu Terrane (2)
-
-
-
Himalayas
-
High Himalayan Crystallines (1)
-
-
Indian Peninsula
-
India
-
Ghats
-
Eastern Ghats (1)
-
-
-
Pakistan (1)
-
-
Middle East
-
Iran (1)
-
Israel (1)
-
Jordan (1)
-
Turkey
-
Anatolia (1)
-
-
-
Sri Lanka (1)
-
-
boron
-
B-11/B-10 (1)
-
-
Canada
-
Eastern Canada
-
Ontario
-
Sudbury District Ontario (1)
-
-
-
-
carbon
-
C-13/C-12 (1)
-
-
Cenozoic
-
Quaternary
-
Holocene (1)
-
Pleistocene (2)
-
-
Tertiary
-
Neogene
-
Miocene (3)
-
Pliocene (2)
-
-
Paleogene
-
Eocene (2)
-
Oligocene
-
Fish Canyon Tuff (1)
-
-
Paleocene
-
upper Paleocene (1)
-
-
-
-
-
continental drift (2)
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crust (7)
-
crystal chemistry (1)
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crystal growth (1)
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crystal structure (1)
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deformation (2)
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diagenesis (1)
-
Europe
-
Alps
-
Eastern Alps (1)
-
-
Carpathians
-
Matra Mountains (1)
-
-
Central Europe
-
Bohemian Massif (1)
-
Germany
-
Bavaria Germany (2)
-
Eifel (1)
-
Rhineland-Palatinate Germany
-
Laacher See (1)
-
-
-
Hungary
-
Matra Mountains (1)
-
-
-
Rhenish Schiefergebirge
-
Eifel (1)
-
-
Southern Europe
-
Greece
-
Greek Aegean Islands
-
Cyclades
-
Syros (1)
-
-
-
-
Iberian Peninsula
-
Iberian Massif (2)
-
Ossa-Morena Zone (1)
-
Spain
-
Galicia Spain
-
Cabo Ortegal Complex (1)
-
-
-
-
Italy
-
Sardinia Italy (2)
-
-
-
Variscides (3)
-
Western Europe
-
France
-
Paris Basin (1)
-
-
-
-
faults (3)
-
fractures (2)
-
geochemistry (5)
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igneous rocks
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plutonic rocks
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granites
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aplite (1)
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pegmatite (2)
-
-
volcanic rocks
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adakites (1)
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basalts (1)
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phonolites (1)
-
pyroclastics
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ignimbrite (2)
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tuff (1)
-
-
-
-
inclusions (2)
-
Integrated Ocean Drilling Program
-
Expedition 330
-
IODP Site U1372 (1)
-
IODP Site U1374 (1)
-
IODP Site U1376 (1)
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IODP Site U1377 (1)
-
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Expedition 341
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IODP Site U1418 (1)
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intrusions (4)
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isotopes
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radioactive isotopes
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Sm-147/Nd-144 (1)
-
-
stable isotopes
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B-11/B-10 (1)
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C-13/C-12 (1)
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Hf-177/Hf-176 (8)
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Nd-144/Nd-143 (1)
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O-18/O-16 (1)
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Sm-147/Nd-144 (1)
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Sr-87/Sr-86 (2)
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magmas (5)
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mantle (1)
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Mediterranean region
-
Aegean Islands
-
Greek Aegean Islands
-
Cyclades
-
Syros (1)
-
-
-
-
-
Mediterranean Sea
-
East Mediterranean
-
Levantine Basin (1)
-
-
-
Mesozoic
-
Cretaceous
-
Lower Cretaceous
-
Cadomin Formation (1)
-
Urgonian (1)
-
-
Upper Cretaceous (1)
-
-
Jurassic
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Middle Jurassic (1)
-
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Triassic (2)
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metal ores
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cobalt ores (1)
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copper ores (1)
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gold ores (2)
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nickel ores (1)
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metals
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actinides
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uranium (2)
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alkaline earth metals
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barium (1)
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strontium
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Sr-87/Sr-86 (2)
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-
-
copper (1)
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hafnium
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Hf-177/Hf-176 (8)
-
-
platinum group
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palladium (1)
-
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rare earths
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neodymium
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Nd-144/Nd-143 (1)
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Sm-147/Nd-144 (1)
-
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samarium
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Sm-147/Nd-144 (1)
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scandium (1)
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ytterbium (1)
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-
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metamorphic rocks
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amphibolites (1)
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eclogite (4)
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gneisses (2)
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metasedimentary rocks
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metapelite (1)
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migmatites
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anatexite (1)
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-
schists
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blueschist (1)
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-
-
metamorphism (10)
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metasomatism (5)
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Mexico
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Guerrero Mexico (1)
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mineral deposits, genesis (3)
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mineral exploration (2)
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North America
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Canadian Shield
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Pacific Ocean
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Gulf of Alaska (1)
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South Pacific (1)
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paleoclimatology (2)
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paleogeography (7)
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Paleozoic
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Cambrian (1)
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Carboniferous
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Mississippian
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Lower Mississippian
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Tournaisian (1)
-
-
-
Pennsylvanian (1)
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Upper Carboniferous (1)
-
-
Devonian
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Lower Devonian
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Emsian (1)
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-
Old Red Sandstone (1)
-
-
Ordovician (3)
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Permian (2)
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Silurian (1)
-
-
petroleum (1)
-
Phanerozoic (1)
-
phase equilibria (1)
-
plate tectonics (5)
-
Precambrian
-
Archean
-
Fig Tree Group (1)
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Paleoarchean (1)
-
-
Hadean (1)
-
upper Precambrian
-
Proterozoic
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Mesoproterozoic (3)
-
Neoproterozoic
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Ediacaran (2)
-
Vendian (1)
-
-
Paleoproterozoic
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Cobalt Group (1)
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-
-
-
-
sea water (1)
-
sedimentary rocks
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carbonate rocks
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-
clastic rocks
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arenite
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structural analysis (1)
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United States
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sedimentary rocks
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siliciclastics (2)
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sedimentary structures
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sedimentary structures (1)
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sediments
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sediments (1)
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siliciclastics (2)
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GeoRef Categories
Era and Period
Epoch and Age
Book Series
Date
Availability
Boron coordination in omphacite and glaucophane derived from inter-mineral B isotope fractionation in natural rocks Available to Purchase
In situ garnet U-Pb dating of granulitized eclogites from NE Sardinia, Italy Available to Purchase
Cadomia origins: paired Ediacaran ophiolites from the Iberian Massif, the opening and closure record of peri-Gondwanan basins Available to Purchase
Abstract The recent discovery of Ediacaran ophiolites in the SW Iberian Massif has made it possible to pinpoint the evolution of the Cadomian basement of Europe. The Calzadilla and Mérida ophiolites (gabbroic protoliths dated at c. 600 and 594 Ma, respectively) have geochemical characteristics typical of supra-subduction zone ophiolites. They are interpreted as originating during the initial opening of a forearc basin with boninitic magmatism (Calzadilla), followed by the formation of a back-arc basin with arc-tholeiites (Mérida). Widening of the back-arc led to the rifting and drifting of a section of the active continental margin (Cadomia). Closure of these oceanic domains initiated rapid contraction, culminating in the collision of Cadomia with Gondwana (c. 590–540 Ma). The application of a PANALESIS model to this palaeogeographic setting confirms the plausibility of Cadomian rifting and the likely opening of broad oceanic domains. It also confirms the final collision of Cadomia with Gondwana, although the synthetic and regional data disagree in the precise chronology of the convergence and collision of Cadomia with the West Africa Craton. This work shows that the evolution of the Cadomian basement is much more complex than traditionally considered.
Tracing Oligocene–Miocene source-to-sink systems in the deep Levant Basin: A sandstone provenance study Available to Purchase
Timing of carbon uptake by oceanic crust determined by rock reactivity Available to Purchase
Timing of Magmatism and Skarn Formation at the Limon, Guajes, and Media Luna Gold ± Copper Skarn Deposits at Morelos, Guerrero State, Mexico Open Access
Magma accumulation underneath Laacher See volcano from detrital zircon in modern streams Available to Purchase
Geology, geochemistry, and apatite/titanite U–Pb geochronology of ca. 1.88 Ga alkaline ultrabasic dykes in the Southern Province near Sudbury, Ontario Open Access
Paleozoic sedimentation and Caledonian terrane architecture in NW Svalbard: indications from U–Pb geochronology and structural analysis Open Access
100 myr cycles of oceanic lithosphere generation in peri-Gondwana: Neoproterozoic–Devonian ophiolites from the NW African–Iberian margin of Gondwana and the Variscan Orogen Available to Purchase
Abstract The Variscan Orogen in Iberia and the Anti-Atlas Mountains in Morocco contains a set of ophiolites formed between Neoproterozoic and Devonian times, during the complex evolution of the NW African–Iberian margin of Gondwana. During this time interval, the margin evolved from an active margin (c. 750–500 Ma: the Reguibat–Avalonian–Cadomian arc) to the final collision with Laurussia in Devonian times to form Pangaea. In this context, one of the oldest recognized ophiolites is the Bou Azzer Ophiolite from the Anti-Atlas Mountains, dated at c. 697 Ma and containing two types of mafic rocks, the youngest of which has a boninitic composition. To the north, in the SW Iberian Massif, the Calzadilla Ophiolite contains mafic rocks also of boninitic composition dated at c. 598 Ma. Farther north, in the NW Iberian Massif, the Vila de Cruces Ophiolite is formed by a thick sequence of mafic rocks with an arc tholeiitic composition and minor alternations of tonalitic orthogneisses dated at c. 497 Ma. In the same region, the Bazar Ophiolite has a similar age of c. 495 Ma. Also in NW Iberia, there is a group of ophiolites with varied lithologies and dominant mafic rocks with arc tholeiitic composition (Careón, Purrido and Moeche ophiolites) dated at c. 395 Ma. The composition of all these peri-Gondwanan ophiolites is of supra-subduction zone type, showing no evidence of preserved mid-ocean ridge basalt type oceanic lithosphere. Consequently, these ophiolites were generated in the peri-Gondwanan realm during the opening of forearc or back-arc basins. Forearc oceanic lithosphere was promptly obducted or accreted to the volcanic arc, but the oceanic or transitional lithosphere generated in back-arc settings was preserved until the assembly of Pangaea. Based on the ages of the described ophiolites, the peri-Gondwanan realm has been a domain where the generation of oceanic or transitional lithosphere seems to have occurred at intervals of c. 100 myr. These regularly spaced time intervals may indicate cyclic events of mantle upwelling in the peri-Gondwanan mid-ocean ridges, with associated higher subduction rates at the peri-Gondwanan trenches and concomitant higher rates of partial melting in the mantle wedges involved. The origin of the apparent cyclicity for mantle upwelling in the peri-Gondwanan ocean ridges is unclear, but it could have possibly been related to episodic deep mantle convection. Cycles of more active deep mantle convection can explain episodic mantle upwelling, the transition from low- to fast-spreading type mid-ocean ridges and, finally, the dynamic context for the episodic generation of new supra-subduction zone type oceanic peri-Gondwanan lithosphere.
Updated geochronology and isotope geochemistry of the Vila de Cruces Ophiolite: a case study of a peri-Gondwanan back-arc ophiolite Available to Purchase
Abstract In the Variscan Orogen, the NW Iberian Massif exposes a variety of ophiolites formed at c. 500 and c. 400 Ma that provide constraints on the Paleozoic evolution of the NNW African margin of Gondwana which culminated in the assembly of Pangaea. New U–Pb ages obtained in zircon from one of these ophiolites, the Vila de Cruces Ophiolite, confirm the previous U–Pb age of c. 500 Ma (thermal ionization mass spectrometry (TIMS)) obtained in zircon from a tonalitic orthogneiss. New samples of the same orthogneiss and related gabbros provided ages (laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS)) in the range 498–492 Ma, with the metagabbros being the youngest. Moreover, two different gabbro samples contain a scattered population of inherited zircon grains with an average age of c. 1150 Ma. These zircons probably represent xenolitic material included in the gabbros during their ascent and intrusion along the margin of Gondwana. Taking into account the architecture of the Vila de Cruces Ophiolite and its geochemical composition, this ophiolite is interpreted as a section of oceanic or transitional lithosphere formed in a back-arc basin opened in the peri-Gondwanan realm. The presence of inherited Mesoproterozoic zircons is likely to suggest the existence of a hidden unexposed Mesoproterozoic basement in the Gondwana margin during Paleozoic times.
Stacked megafans of the Kalahari Basin as archives of paleogeography, river capture, and Cenozoic paleoclimate of southwestern Africa Available to Purchase
Phase equilibria constraints on crystallization differentiation: insights into the petrogenesis of the normally zoned Buddusò Pluton in north-central Sardinia Available to Purchase
Abstract The Buddusò Pluton in NE Sardinia (Italy) is a normally zoned intrusion composed of three units with chemical composition ranging from hornblende-bearing tonalites (SiO 2 ∼ 65 wt%) to leucocratic monzogranites (SiO 2 ∼ 76 wt%). Zircon crystals in the pluton are dated at 292.2 ± 0.7 Ma and have ε Hf values ranging from −4 to −8, with no systematic differences observed between the units. The pluton, which is isotopically homogeneous at the whole-rock scale in terms of Sr and Nd isotopes, shows textural evidence indicating local crystal–melt segregation. In this paper, we have implemented a novel approach based on path-dependent phase-equilibria modelling to test the hypothesis that the internal chemical variability of the pluton was generated by crystallization differentiation of a homogeneous parental magma. Our modelling indicates that this hypothesis is valid if the mechanism by which this occurs is compaction in a rheologically locked crystal-rich magma and if the separation occurs at 0.3 GPa from a tonalitic magma with water content >2 wt%. Finally, a subset of the magmatic enclaves in the pluton are considered to be autoliths, formed by the disruption of the compacted crystal mush and interaction between these cumulates and the felsic melt.