- Abstract
- Affiliation
- All
- Authors
- Book Series
- DOI
- EISBN
- EISSN
- Full Text
- GeoRef ID
- ISBN
- ISSN
- Issue
- Keyword (GeoRef Descriptor)
- Meeting Information
- Report #
- Title
- Volume
- Abstract
- Affiliation
- All
- Authors
- Book Series
- DOI
- EISBN
- EISSN
- Full Text
- GeoRef ID
- ISBN
- ISSN
- Issue
- Keyword (GeoRef Descriptor)
- Meeting Information
- Report #
- Title
- Volume
- Abstract
- Affiliation
- All
- Authors
- Book Series
- DOI
- EISBN
- EISSN
- Full Text
- GeoRef ID
- ISBN
- ISSN
- Issue
- Keyword (GeoRef Descriptor)
- Meeting Information
- Report #
- Title
- Volume
- Abstract
- Affiliation
- All
- Authors
- Book Series
- DOI
- EISBN
- EISSN
- Full Text
- GeoRef ID
- ISBN
- ISSN
- Issue
- Keyword (GeoRef Descriptor)
- Meeting Information
- Report #
- Title
- Volume
- Abstract
- Affiliation
- All
- Authors
- Book Series
- DOI
- EISBN
- EISSN
- Full Text
- GeoRef ID
- ISBN
- ISSN
- Issue
- Keyword (GeoRef Descriptor)
- Meeting Information
- Report #
- Title
- Volume
- Abstract
- Affiliation
- All
- Authors
- Book Series
- DOI
- EISBN
- EISSN
- Full Text
- GeoRef ID
- ISBN
- ISSN
- Issue
- Keyword (GeoRef Descriptor)
- Meeting Information
- Report #
- Title
- Volume
NARROW
GeoRef Subject
-
all geography including DSDP/ODP Sites and Legs
-
Africa
-
East Africa
-
Tanzania
-
Oldoinyo Lengai (4)
-
-
-
East African Rift (1)
-
Southern Africa
-
South Africa (4)
-
-
-
Asia
-
Far East
-
China
-
Sichuan China (1)
-
-
-
Indian Peninsula
-
India
-
Dharwar Craton (1)
-
Ghats
-
Eastern Ghats (1)
-
-
-
-
Siberia (1)
-
Yakutia Russian Federation
-
Aldan Russian Federation (1)
-
-
-
Bathurst Island (1)
-
Canada
-
Arctic Archipelago (2)
-
Eastern Canada
-
Ontario
-
Coldwell Complex (8)
-
Thunder Bay District Ontario (1)
-
-
Quebec
-
Monteregian Hills (1)
-
Oka Complex (3)
-
-
-
Nunavut
-
Somerset Island (5)
-
-
Western Canada
-
Northwest Territories (6)
-
-
-
Commonwealth of Independent States
-
Russian Federation
-
Murmansk Russian Federation
-
Khibiny Mountains (7)
-
Kola Peninsula (13)
-
Kola Russian Federation (1)
-
Kovdor Massif (1)
-
Lovozero Massif (3)
-
-
Yakutia Russian Federation
-
Aldan Russian Federation (1)
-
-
-
-
Europe
-
Central Europe
-
Germany
-
Baden-Wurttemberg Germany
-
Kaiserstuhl (1)
-
-
-
-
Murmansk Russian Federation
-
Khibiny Mountains (7)
-
Kola Peninsula (13)
-
Kola Russian Federation (1)
-
Kovdor Massif (1)
-
Lovozero Massif (3)
-
-
Western Europe
-
Scandinavia
-
Norway
-
Troms Norway (1)
-
-
Sweden (2)
-
-
United Kingdom
-
Great Britain
-
England
-
Yorkshire England (1)
-
-
Wales (2)
-
-
-
-
-
North America
-
Canadian Shield (1)
-
Great Lakes
-
Lake Superior (1)
-
-
Great Lakes region (3)
-
-
South America
-
Brazil
-
Minas Gerais Brazil
-
Araxa Brazil (1)
-
Pocos de Caldas Brazil (1)
-
-
-
-
United States
-
Arkansas
-
Pike County Arkansas (1)
-
-
Midcontinent (1)
-
Montana (2)
-
Wyoming
-
Sweetwater County Wyoming (1)
-
-
-
-
commodities
-
barite deposits (1)
-
metal ores
-
lead ores (1)
-
lead-zinc deposits (1)
-
niobium ores (2)
-
rare earth deposits (1)
-
zinc ores (1)
-
-
mineral deposits, genesis (5)
-
-
elements, isotopes
-
carbon
-
C-13/C-12 (1)
-
-
halogens
-
chlorine (2)
-
-
isotope ratios (3)
-
isotopes
-
radioactive isotopes
-
Rb-87/Sr-86 (1)
-
Sm-147/Nd-144 (1)
-
-
stable isotopes
-
C-13/C-12 (1)
-
Nd-144/Nd-143 (2)
-
Rb-87/Sr-86 (1)
-
Sm-147/Nd-144 (1)
-
Sr-87/Sr-86 (4)
-
-
-
metals
-
alkali metals
-
cesium (1)
-
potassium (3)
-
rubidium
-
Rb-87/Sr-86 (1)
-
-
sodium (2)
-
-
alkaline earth metals
-
beryllium (1)
-
strontium
-
Rb-87/Sr-86 (1)
-
Sr-87/Sr-86 (4)
-
-
-
aluminum (1)
-
hafnium (1)
-
iron (2)
-
lead (1)
-
niobium (6)
-
platinum group
-
palladium (1)
-
-
rare earths
-
cerium (1)
-
neodymium
-
Nd-144/Nd-143 (2)
-
Sm-147/Nd-144 (1)
-
-
samarium
-
Sm-147/Nd-144 (1)
-
-
-
tantalum (1)
-
zinc (1)
-
zirconium (3)
-
-
sulfur (1)
-
tellurium (1)
-
-
geochronology methods
-
K/Ar (2)
-
Rb/Sr (3)
-
U/Pb (2)
-
-
geologic age
-
Cenozoic
-
Tertiary
-
Paleogene
-
Eocene (1)
-
Oligocene (1)
-
-
-
-
Mesozoic
-
Cretaceous (1)
-
-
Paleozoic
-
Ordovician (1)
-
Silurian (1)
-
-
Precambrian
-
Archean (2)
-
upper Precambrian
-
Proterozoic
-
Mesoproterozoic
-
Helikian
-
Neohelikian (1)
-
-
-
Neoproterozoic (3)
-
Paleoproterozoic
-
Aphebian (2)
-
-
-
-
-
-
igneous rocks
-
extrusive rocks (1)
-
igneous rocks
-
carbonatites (18)
-
feldspathoid rocks (2)
-
hypabyssal rocks (1)
-
kimberlite (13)
-
plutonic rocks
-
gabbros
-
olivine gabbro (1)
-
troctolite (2)
-
-
granites
-
charnockite (1)
-
-
ijolite (3)
-
lamproite (4)
-
lamprophyres
-
monchiquite (1)
-
-
monzonites (1)
-
pegmatite (1)
-
syenites
-
albitite (3)
-
alkali syenites (2)
-
nepheline syenite
-
agpaite (1)
-
-
-
ultramafics
-
peridotites
-
garnet lherzolite (1)
-
harzburgite (1)
-
lherzolite (1)
-
spinel lherzolite (1)
-
-
pyroxenite (2)
-
-
-
volcanic rocks
-
basanite (1)
-
leucitite (1)
-
melilitite (2)
-
nephelinite (3)
-
phonolites (2)
-
-
-
wehrlite (1)
-
-
metamorphic rocks
-
metamorphic rocks
-
metasomatic rocks (1)
-
-
-
minerals
-
arsenides
-
skutterudite (1)
-
-
bismuthides
-
michenerite (1)
-
-
carbonates
-
bastnaesite (1)
-
calcite (5)
-
dolomite (1)
-
-
halides
-
chlorides
-
halite (2)
-
sylvite (2)
-
-
fluorides
-
bastnaesite (1)
-
neighborite (2)
-
-
-
minerals (3)
-
native elements
-
diamond (1)
-
-
oxides
-
aluminum oxides (1)
-
chrome spinel (1)
-
franklinite (1)
-
geikielite (1)
-
hibonite (1)
-
hollandite (1)
-
hydroxides (1)
-
ilmenite (3)
-
jacobsite (1)
-
magnesioferrite (1)
-
niobates
-
betafite (1)
-
loparite (7)
-
pyrochlore (8)
-
-
perovskite (14)
-
portlandite (1)
-
priderite (1)
-
pyrophanite (3)
-
rutile (2)
-
sapphire (1)
-
spinel (3)
-
tantalates
-
betafite (1)
-
microlite (1)
-
-
ulvospinel (1)
-
-
phosphates
-
apatite (5)
-
fluorapatite (1)
-
hydroxylapatite (1)
-
monazite (2)
-
-
platinum minerals (1)
-
silicates
-
chain silicates
-
aenigmatite group
-
sapphirine (1)
-
-
amphibole group
-
clinoamphibole
-
arfvedsonite (3)
-
richterite (2)
-
-
-
astrophyllite (1)
-
pyroxene group
-
clinopyroxene
-
diopside (1)
-
-
orthopyroxene (1)
-
-
-
framework silicates
-
feldspar group (1)
-
nepheline group
-
kalsilite (2)
-
nepheline (4)
-
-
pseudoleucite (2)
-
zeolite group
-
analcime (1)
-
-
-
orthosilicates
-
nesosilicates
-
garnet group
-
pyrope (1)
-
-
larnite (1)
-
olivine group
-
monticellite (1)
-
olivine (3)
-
-
titanite group
-
titanite (4)
-
-
zircon group
-
zircon (1)
-
-
-
sorosilicates
-
epidote group
-
allanite (1)
-
-
melilite group
-
melilite (1)
-
-
-
-
ring silicates (1)
-
sheet silicates
-
mica group
-
biotite (1)
-
phlogopite (7)
-
-
serpentine group
-
chrysotile (1)
-
lizardite (1)
-
serpentine (2)
-
-
-
-
sulfates
-
barite (2)
-
-
sulfides
-
galena (1)
-
iron sulfides (1)
-
-
tellurides (1)
-
wehrlite (1)
-
-
Primary terms
-
absolute age (6)
-
Africa
-
East Africa
-
Tanzania
-
Oldoinyo Lengai (4)
-
-
-
East African Rift (1)
-
Southern Africa
-
South Africa (4)
-
-
-
Asia
-
Far East
-
China
-
Sichuan China (1)
-
-
-
Indian Peninsula
-
India
-
Dharwar Craton (1)
-
Ghats
-
Eastern Ghats (1)
-
-
-
-
Siberia (1)
-
Yakutia Russian Federation
-
Aldan Russian Federation (1)
-
-
-
associations (1)
-
barite deposits (1)
-
Canada
-
Arctic Archipelago (2)
-
Eastern Canada
-
Ontario
-
Coldwell Complex (8)
-
Thunder Bay District Ontario (1)
-
-
Quebec
-
Monteregian Hills (1)
-
Oka Complex (3)
-
-
-
Nunavut
-
Somerset Island (5)
-
-
Western Canada
-
Northwest Territories (6)
-
-
-
carbon
-
C-13/C-12 (1)
-
-
Cenozoic
-
Tertiary
-
Paleogene
-
Eocene (1)
-
Oligocene (1)
-
-
-
-
chemical analysis (1)
-
crystal chemistry (15)
-
crystal structure (20)
-
data processing (1)
-
economic geology (3)
-
Europe
-
Central Europe
-
Germany
-
Baden-Wurttemberg Germany
-
Kaiserstuhl (1)
-
-
-
-
Murmansk Russian Federation
-
Khibiny Mountains (7)
-
Kola Peninsula (13)
-
Kola Russian Federation (1)
-
Kovdor Massif (1)
-
Lovozero Massif (3)
-
-
Western Europe
-
Scandinavia
-
Norway
-
Troms Norway (1)
-
-
Sweden (2)
-
-
United Kingdom
-
Great Britain
-
England
-
Yorkshire England (1)
-
-
Wales (2)
-
-
-
-
-
geochemistry (17)
-
geochronology (4)
-
geophysical methods (2)
-
igneous rocks
-
carbonatites (18)
-
feldspathoid rocks (2)
-
hypabyssal rocks (1)
-
kimberlite (13)
-
plutonic rocks
-
gabbros
-
olivine gabbro (1)
-
troctolite (2)
-
-
granites
-
charnockite (1)
-
-
ijolite (3)
-
lamproite (4)
-
lamprophyres
-
monchiquite (1)
-
-
monzonites (1)
-
pegmatite (1)
-
syenites
-
albitite (3)
-
alkali syenites (2)
-
nepheline syenite
-
agpaite (1)
-
-
-
ultramafics
-
peridotites
-
garnet lherzolite (1)
-
harzburgite (1)
-
lherzolite (1)
-
spinel lherzolite (1)
-
-
pyroxenite (2)
-
-
-
volcanic rocks
-
basanite (1)
-
leucitite (1)
-
melilitite (2)
-
nephelinite (3)
-
phonolites (2)
-
-
-
inclusions
-
fluid inclusions (1)
-
-
intrusions (27)
-
isotopes
-
radioactive isotopes
-
Rb-87/Sr-86 (1)
-
Sm-147/Nd-144 (1)
-
-
stable isotopes
-
C-13/C-12 (1)
-
Nd-144/Nd-143 (2)
-
Rb-87/Sr-86 (1)
-
Sm-147/Nd-144 (1)
-
Sr-87/Sr-86 (4)
-
-
-
magmas (14)
-
mantle (8)
-
Mesozoic
-
Cretaceous (1)
-
-
metal ores
-
lead ores (1)
-
lead-zinc deposits (1)
-
niobium ores (2)
-
rare earth deposits (1)
-
zinc ores (1)
-
-
metals
-
alkali metals
-
cesium (1)
-
potassium (3)
-
rubidium
-
Rb-87/Sr-86 (1)
-
-
sodium (2)
-
-
alkaline earth metals
-
beryllium (1)
-
strontium
-
Rb-87/Sr-86 (1)
-
Sr-87/Sr-86 (4)
-
-
-
aluminum (1)
-
hafnium (1)
-
iron (2)
-
lead (1)
-
niobium (6)
-
platinum group
-
palladium (1)
-
-
rare earths
-
cerium (1)
-
neodymium
-
Nd-144/Nd-143 (2)
-
Sm-147/Nd-144 (1)
-
-
samarium
-
Sm-147/Nd-144 (1)
-
-
-
tantalum (1)
-
zinc (1)
-
zirconium (3)
-
-
metamorphic rocks
-
metasomatic rocks (1)
-
-
metasomatism (3)
-
mineral deposits, genesis (5)
-
mineralogy (1)
-
minerals (3)
-
North America
-
Canadian Shield (1)
-
Great Lakes
-
Lake Superior (1)
-
-
Great Lakes region (3)
-
-
Paleozoic
-
Ordovician (1)
-
Silurian (1)
-
-
paragenesis (11)
-
petrology (14)
-
phase equilibria (3)
-
plate tectonics (1)
-
pollution (1)
-
Precambrian
-
Archean (2)
-
upper Precambrian
-
Proterozoic
-
Mesoproterozoic
-
Helikian
-
Neohelikian (1)
-
-
-
Neoproterozoic (3)
-
Paleoproterozoic
-
Aphebian (2)
-
-
-
-
-
sedimentary rocks
-
clastic rocks (1)
-
-
South America
-
Brazil
-
Minas Gerais Brazil
-
Araxa Brazil (1)
-
Pocos de Caldas Brazil (1)
-
-
-
-
sulfur (1)
-
symposia (1)
-
tellurium (1)
-
United States
-
Arkansas
-
Pike County Arkansas (1)
-
-
Midcontinent (1)
-
Montana (2)
-
Wyoming
-
Sweetwater County Wyoming (1)
-
-
-
volcanology (1)
-
waste disposal (1)
-
weathering (1)
-
-
sedimentary rocks
-
sedimentary rocks
-
clastic rocks (1)
-
-
volcaniclastics (1)
-
-
sediments
-
volcaniclastics (1)
-
Petrology and Sr–Nd isotope geochemistry of Mosonik: a polygenetic phonolitic nephelinite–phonolite volcano located in the North Tanzanian Divergence of the East African Rift
Mineralogy of the Marepalli lamproite dyke from the Nalgonda district, Telangana, Southern India
Zero-Valent-Dominant Pyrochlores: Endmember Formula Calculation and Petrogenetic Significance
Formation of the Maoniuping giant REE deposit: Constraints from mineralogy and in situ bastnäsite U-Pb geochronology
Compositional variation and genesis of pyrochlore, belkovite and baotite from the Sevattur carbonatite complex, India
Composition and genesis of albitite-hosted antecrystic pyrochlore from the Sevattur carbonatite complex, India
Mineralogy of volcanic calciocarbonatites from the Trig Point Hill debris flow, Kerimasi volcano, Tanzania: implications for the altered natrocarbonatite hypothesis
Mineralogy and genesis of pyrochlore apatitite from The Good Hope Carbonatite, Ontario: A potential niobium deposit
What is a Kimberlite? Petrology and Mineralogy of Hypabyssal Kimberlites
A new layout and update for Mineralogical Magazine in 2019
Mineralogy of the baotite-bearing Gundrapalli lamproite, Nalgonda district, Telangana, India
Mineralogy of the Vattikod lamproite dykes, Ramadugu lamproite field, Nalgonda District, Telangana: A possible expression of ancient subduction-related alkaline magmatism along Eastern Ghats Mobile Belt, India
Nomenclature of the perovskite supergroup: A hierarchical system of classification based on crystal structure and composition
Primary phases in aluminous slags produced by the aluminothermic reduction of pyrochlore
Emplacement age and isotopic composition of the Prairie Lake carbonatite complex, Northwestern Ontario, Canada
Chlorine in mantle-derived carbonatite melts revealed by halite in the St.-Honoré intrusion (Québec, Canada)
JOHN BARRY DAWSON1932–2013
MARIANOITE, A NEW MEMBER OF THE CUSPIDINE GROUP FROM THE PRAIRIE LAKE SILICOCARBONATITE, ONTARIO: REPLY
Large-Scale Development of Supergene Anatase-Rich Soils on Carbonatite-Associated Pyroxenites in Brazil (Abstract)
Abstract The climatic conditions in central and northern Brazil are conducive to the development of deep lateritic weathering in some carbonatite complexes, including the carbonatite rocks and some of their genetically and spatially related silicate rock units. Lateritic weathering of bebedourite-type pyroxenites genetically related to carbonatites in Brazil has produced a spectacular accumulation of high-grade anatase derived from the decalcification of perovskite. Carbonatite occurrences that contain vast quantities of supergene anatase-rich soils overlying weathered pyroxenites include Tapira, Serra Negra, Salitre I, and Salitre II in Minas Gerais; Cataläo I, in Goiás; and Maicuru and Maraconai in Pará. Soils overlying the weathered pyroxenites range from approximately 15 to 30 wt percent TiO 2 . At Serra Negra, an exploration drill hole gave an average of 20 wt percent TiO 2 as anatase mineralization for a depth of 150 m. The average depth of weathering in weathered pyroxenite in the northwest quadrant of the Serra Negra circular structure is 120 m and the development of anatase is reported to be 40.5 million tons (Mt) of 28.52 wt percent TiO 2 . In the Bananeira area of Salitre I, the average depth of weathering is 80 to 100 m, with reported 60.34 Mt of 24.5 wt percent TiO 2 . In the Para carbonatite, the weathering depth may exceed 300 m. Within the weatheredpyroxenites, diopside, perovskite, apatite, and calcite undergo total chemical breakdown. Calcium and magnesium are efficiently removed from the complexes in the groundwater. Decalcification of the perovskite produces polycrystalline aggregates of micrometer-size anatase platelets. Liberated REE from perovskite, apatite, and calcite are largely immobile, forming supergene monazite, rhabdophane,cerianite, and crandellite-group minerals that occur as crystallites that are inextricably associated with anatase. Direct indication of the development of anatase from perovskite is clearly shown in three ways: (1) by texture with residual cores of perovskite surroundedby polycrystalline clusters of anatase, (2) by pseudomorphsof anatase after euhedral perovskite octahedral, and (3) because chondrite-normalized REE plots for anatase and perovskite show identical slopes that serve as a geochemical proof that anatase is derived from the perovskite. Bebedourite, first described by E. Tröger in 1928, is a pyroxenite containing major amounts of perovskite. The bebedouritesof Minas Gerais and Goiás are of Cretaceous age. Similar pyroxenites occur in other carbonatites, including the Precambrian Powderhorn of Colorado, North America, and in Kovdor of the Kola Peninsula, but in these occurrences, the absence of deep-penetrating lateritic weathering produces only a very thin rock-surface coating of anatase, for which the origin from the decalicification of perovskite is virtually identical to the anatase found in the Brazil carbonatites.