Update search
- 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
Format
Article Type
Journal
Publisher
Section
GeoRef Subject
-
all geography including DSDP/ODP Sites and Legs
-
Africa
-
Southern Africa
-
Karoo Basin (1)
-
South Africa (2)
-
-
-
Antarctica
-
East Antarctica (1)
-
Queen Maud Land
-
Sor-Rondane Mountains (1)
-
-
-
Arctic region
-
Greenland
-
South Greenland (3)
-
-
-
Caledonides (3)
-
Canada
-
Nunavut
-
Ellesmere Island (1)
-
Sverdrup Basin (1)
-
Sverdrup Islands
-
Axel Heiberg Island (1)
-
-
-
Queen Elizabeth Islands
-
Ellesmere Island (1)
-
Sverdrup Basin (1)
-
Sverdrup Islands
-
Axel Heiberg Island (1)
-
-
-
-
Europe
-
Fennoscandia (2)
-
Fennoscandian Shield (7)
-
Karelia (1)
-
Western Europe
-
Scandinavia
-
Finland (2)
-
Norway
-
Kongsberg Norway (1)
-
Oslo Graben (1)
-
Southern Norway (3)
-
Telemark Norway
-
Bamble Norway (1)
-
-
Vest-Agder Norway (1)
-
-
Sweden (1)
-
-
-
-
Oslo Rift (2)
-
-
commodities
-
metal ores
-
arsenic ores (1)
-
molybdenum ores (1)
-
tungsten ores (1)
-
-
mineral deposits, genesis (1)
-
-
elements, isotopes
-
carbon
-
C-13/C-12 (1)
-
-
hydrogen
-
D/H (1)
-
-
isotope ratios (7)
-
isotopes
-
radioactive isotopes
-
Pb-204 (1)
-
-
stable isotopes
-
C-13/C-12 (1)
-
D/H (1)
-
Hf-177/Hf-176 (5)
-
O-18/O-16 (2)
-
-
-
Lu/Hf (5)
-
metals
-
hafnium
-
Hf-177/Hf-176 (5)
-
-
lead
-
Pb-204 (1)
-
-
manganese (1)
-
niobium (1)
-
rare earths
-
lutetium (1)
-
-
-
oxygen
-
O-18/O-16 (2)
-
-
-
geochronology methods
-
Lu/Hf (5)
-
Pb/Pb (2)
-
radiation damage (1)
-
Rb/Sr (2)
-
Sm/Nd (4)
-
U/Pb (11)
-
U/Th/Pb (1)
-
-
geologic age
-
Cenozoic (1)
-
Mesozoic
-
Cretaceous
-
Lower Cretaceous
-
Isachsen Formation (1)
-
-
-
-
Paleozoic
-
Carboniferous (1)
-
Ordovician
-
Upper Ordovician
-
Hirnantian (1)
-
-
-
Permian (2)
-
upper Paleozoic (1)
-
-
Precambrian
-
Archean (1)
-
upper Precambrian
-
Proterozoic
-
Mesoproterozoic (6)
-
Neoproterozoic (3)
-
Paleoproterozoic (2)
-
Pretoria Group (1)
-
-
-
-
-
igneous rocks
-
igneous rocks
-
carbonatites (1)
-
plutonic rocks
-
anorthosite (1)
-
granites
-
A-type granites (1)
-
I-type granites (1)
-
rapakivi (1)
-
-
monzonites (1)
-
pegmatite (1)
-
syenites
-
nepheline syenite (1)
-
-
-
volcanic rocks
-
pyroclastics (1)
-
-
-
-
metamorphic rocks
-
metamorphic rocks
-
gneisses (1)
-
granulites (1)
-
metaigneous rocks
-
metagranite (1)
-
-
metasedimentary rocks
-
metaconglomerate (1)
-
-
metasomatic rocks
-
skarn (1)
-
-
quartzites (1)
-
-
-
minerals
-
phosphates
-
apatite (1)
-
-
silicates
-
framework silicates
-
silica minerals
-
quartz (2)
-
-
-
orthosilicates
-
nesosilicates
-
zircon group
-
zircon (13)
-
-
-
-
sheet silicates
-
mica group
-
biotite (1)
-
-
-
-
-
Primary terms
-
absolute age (13)
-
Africa
-
Southern Africa
-
Karoo Basin (1)
-
South Africa (2)
-
-
-
Antarctica
-
East Antarctica (1)
-
Queen Maud Land
-
Sor-Rondane Mountains (1)
-
-
-
Arctic region
-
Greenland
-
South Greenland (3)
-
-
-
Canada
-
Nunavut
-
Ellesmere Island (1)
-
Sverdrup Basin (1)
-
Sverdrup Islands
-
Axel Heiberg Island (1)
-
-
-
Queen Elizabeth Islands
-
Ellesmere Island (1)
-
Sverdrup Basin (1)
-
Sverdrup Islands
-
Axel Heiberg Island (1)
-
-
-
-
carbon
-
C-13/C-12 (1)
-
-
Cenozoic (1)
-
crust (5)
-
crystal chemistry (2)
-
data processing (1)
-
deformation (1)
-
Europe
-
Fennoscandia (2)
-
Fennoscandian Shield (7)
-
Karelia (1)
-
Western Europe
-
Scandinavia
-
Finland (2)
-
Norway
-
Kongsberg Norway (1)
-
Oslo Graben (1)
-
Southern Norway (3)
-
Telemark Norway
-
Bamble Norway (1)
-
-
Vest-Agder Norway (1)
-
-
Sweden (1)
-
-
-
-
faults (1)
-
geochemistry (2)
-
hydrogen
-
D/H (1)
-
-
igneous rocks
-
carbonatites (1)
-
plutonic rocks
-
anorthosite (1)
-
granites
-
A-type granites (1)
-
I-type granites (1)
-
rapakivi (1)
-
-
monzonites (1)
-
pegmatite (1)
-
syenites
-
nepheline syenite (1)
-
-
-
volcanic rocks
-
pyroclastics (1)
-
-
-
inclusions
-
fluid inclusions (2)
-
-
intrusions (3)
-
isotopes
-
radioactive isotopes
-
Pb-204 (1)
-
-
stable isotopes
-
C-13/C-12 (1)
-
D/H (1)
-
Hf-177/Hf-176 (5)
-
O-18/O-16 (2)
-
-
-
magmas (3)
-
mantle (2)
-
Mesozoic
-
Cretaceous
-
Lower Cretaceous
-
Isachsen Formation (1)
-
-
-
-
metal ores
-
arsenic ores (1)
-
molybdenum ores (1)
-
tungsten ores (1)
-
-
metals
-
hafnium
-
Hf-177/Hf-176 (5)
-
-
lead
-
Pb-204 (1)
-
-
manganese (1)
-
niobium (1)
-
rare earths
-
lutetium (1)
-
-
-
metamorphic rocks
-
gneisses (1)
-
granulites (1)
-
metaigneous rocks
-
metagranite (1)
-
-
metasedimentary rocks
-
metaconglomerate (1)
-
-
metasomatic rocks
-
skarn (1)
-
-
quartzites (1)
-
-
metamorphism (2)
-
metasomatism (2)
-
mineral deposits, genesis (1)
-
oxygen
-
O-18/O-16 (2)
-
-
paleogeography (2)
-
Paleozoic
-
Carboniferous (1)
-
Ordovician
-
Upper Ordovician
-
Hirnantian (1)
-
-
-
Permian (2)
-
upper Paleozoic (1)
-
-
Precambrian
-
Archean (1)
-
upper Precambrian
-
Proterozoic
-
Mesoproterozoic (6)
-
Neoproterozoic (3)
-
Paleoproterozoic (2)
-
Pretoria Group (1)
-
-
-
-
sedimentary rocks
-
carbonate rocks (1)
-
clastic rocks
-
conglomerate (1)
-
sandstone (4)
-
shale (1)
-
-
-
sedimentation (3)
-
sediments (1)
-
spectroscopy (1)
-
tectonics (2)
-
weathering (1)
-
-
sedimentary rocks
-
sedimentary rocks
-
carbonate rocks (1)
-
clastic rocks
-
conglomerate (1)
-
sandstone (4)
-
shale (1)
-
-
-
-
sediments
-
sediments (1)
-
GeoRef Categories
Era and Period
Epoch and Age
Book Series
Date
Availability
Compositional Variations in the Rinkite-(Ce)–Nacareniobsite-(Ce) Solid Solution Provide Evidence for Fractionation Processes in Highly Peralkaline Magmas (Ilímaussaq Complex, South Greenland) Available to Purchase
Open-system behaviour of detrital zircon during weathering: an example from the Palaeoproterozoic Pretoria Group, South Africa Open Access
Variation in Major and Trace Elements of Primary WÖhlerite As an Indicator of the Origin of Pegmatites in the Larvik Plutonic Complex, Norway Available to Purchase
One Hundred Fifty Million Years of Intrusive Activity in the Sør Rondane Mountains (East Antarctica): Implications for Gondwana Assembly Available to Purchase
U–Pb and Lu–Hf zircon data in young sediments reflect sedimentary recycling in eastern South Africa Available to Purchase
The source of Proterozoic anorthosite and rapakivi granite magmatism: evidence from combined in situ Hf–O isotopes of zircon in the Ahvenisto complex, southeastern Finland Available to Purchase
Provenance and rift basin architecture of the Neoproterozoic Hedmark Basin, South Norway inferred from U–Pb ages and Lu–Hf isotopes of conglomerate clasts and detrital zircons Available to Purchase
Tectonomagmatic evolution of the Early Ordovician suprasubduction-zone ophiolites of the Trondheim Region, Mid-Norwegian Caledonides Available to Purchase
Abstract The Trondheim Region ophiolites in the Mid-Norwegian Caledonides represent variably tectonized ophiolite fragments. We present high-precision thermal-ionization mass spectrometry and secondary-ion mass spectrometry (SIMS) U–Pb zircon dates, whole-rock geochemical and Sm–Nd data and Lu–Hf zircon analyses that permit the timing and nature of various stages in the evolution of the ophiolite to be elucidated. Plagiogranite intrusions dated at 487 and 480 Ma have relatively juvenile Nd and Hf isotopic compositions (ɛ Nd( t ) =6.3, ɛ Hf( t ) =8.2–12.4). Geochemical data indicate a subduction-zone influence, suggesting formation in an oceanic back-arc setting. At 481 Ma, a granitoid body with a relatively strong unradiogenic Nd and Hf isotopic composition (ɛ Nd( t ) =−2.6 to −4.0, ɛ Hf( t ) =3.8–6.4) and subduction-zone geochemical signature intruded the ophiolite. We interpret this stage to reflect the formation or migration of an oceanic arc above a subduction zone influenced by continentally derived sediments. At c. 475–465 Ma, a greenstone-dominated conglomerate and volcaniclastic sequence was deposited on the eroded ophiolite, indicating obduction between about 480 and 475 Ma. At c. 468–467 Ma, the deformed ophiolite and its sedimentary cover was intruded by trondhjemite dykes and shoshonitic volcanic rocks with intermediate Nd and Hf isotopic compositions (ɛ Nd( t ) =3.0–3.9, ɛ Hf( t ) =4.4–10.2). We interpret this magmatism to reflect subduction-polarity reversal and establishment of a magmatic arc at the continental margin shortly after obduction. Supplementary material: Whole-rock geochemistry, Sm–Nd isotopic data, SHRIMP U–Pb zircon, TIMS U–Pb zircon and Lu–Hf isotopic data are available at http://www.geolsoc.org.uk/SUP18689 .