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NARROW
GeoRef Subject
-
all geography including DSDP/ODP Sites and Legs
-
Africa
-
Southern Africa
-
Kaapvaal Craton (1)
-
Karoo Basin (1)
-
South Africa
-
Bushveld Complex (1)
-
KwaZulu-Natal South Africa (1)
-
Limpopo South Africa (1)
-
-
-
-
Altiplano (1)
-
Asia
-
Far East
-
China
-
Hong Kong (1)
-
Inner Mongolia China (1)
-
Ordos Basin (1)
-
Yunnan China
-
Chengjiang China (1)
-
-
-
Mongolia (1)
-
-
Siberia (1)
-
Yakutia Russian Federation
-
Indigirka River (1)
-
Udachnaya Pipe (1)
-
-
-
Australasia
-
Australia
-
New South Wales Australia (1)
-
-
-
Cache Creek Terrane (1)
-
Cache Valley (1)
-
Caledonides (1)
-
Canada
-
Eastern Canada
-
Quebec
-
Manicouagan Crater (1)
-
-
-
Stikinia Terrane (1)
-
Western Canada
-
Canadian Cordillera (1)
-
Yukon Territory
-
Whitehorse Yukon Territory (1)
-
-
-
Whitehorse Trough (1)
-
-
Cascade Range (1)
-
Commonwealth of Independent States
-
Russian Federation
-
Murmansk Russian Federation (1)
-
Yakutia Russian Federation
-
Indigirka River (1)
-
Udachnaya Pipe (1)
-
-
-
Urals (1)
-
-
Death Valley (1)
-
Europe
-
Lapland (1)
-
Murmansk Russian Federation (1)
-
Southern Europe
-
Iberian Peninsula
-
Portugal
-
Evora Portugal (1)
-
-
-
-
Western Europe
-
France
-
Var France
-
Maures Massif (1)
-
-
-
Scandinavia
-
Norway
-
Finnmark Norway
-
Seiland (1)
-
-
Northern Norway (1)
-
Soroy (1)
-
-
-
United Kingdom
-
Great Britain
-
Scotland (1)
-
-
-
-
-
Midland Valley (1)
-
North America
-
Basin and Range Province
-
Great Basin (1)
-
-
Canadian Shield
-
Grenville Province (1)
-
-
Intermontane Belt (1)
-
Keweenawan Rift (1)
-
North American Cordillera
-
Canadian Cordillera (1)
-
-
North American Craton (1)
-
Yukon-Tanana Terrane (1)
-
-
Quesnellia Terrane (1)
-
South America
-
Andes
-
Eastern Cordillera (1)
-
Western Cordillera (1)
-
-
Peru
-
Puno Peru (1)
-
-
-
South Mountain (1)
-
United States
-
California
-
Inyo County California
-
Panamint Range (1)
-
-
-
Great Basin (1)
-
Idaho
-
Adams County Idaho (1)
-
Bannock County Idaho (2)
-
Bannock Range (2)
-
Canyon County Idaho (1)
-
Idaho County Idaho (1)
-
Owyhee County Idaho (1)
-
Valley County Idaho (1)
-
-
Idaho Batholith (1)
-
Owyhee Mountains (1)
-
Utah (1)
-
Washington
-
Lewis County Washington (1)
-
-
-
-
commodities
-
gems (1)
-
metal ores
-
gold ores (1)
-
-
-
elements, isotopes
-
carbon
-
C-13/C-12 (1)
-
organic carbon (1)
-
-
isotope ratios (5)
-
isotopes
-
radioactive isotopes
-
Pb-206/Pb-204 (1)
-
Pb-207/Pb-204 (1)
-
Pb-208/Pb-204 (1)
-
Rb-87/Sr-86 (2)
-
Sm-147/Nd-144 (1)
-
U-238/Pb-206 (1)
-
-
stable isotopes
-
C-13/C-12 (1)
-
Nd-144/Nd-143 (2)
-
O-18/O-16 (1)
-
Pb-206/Pb-204 (1)
-
Pb-207/Pb-204 (1)
-
Pb-207/Pb-206 (1)
-
Pb-208/Pb-204 (1)
-
Rb-87/Sr-86 (2)
-
Sm-147/Nd-144 (1)
-
Sr-87/Sr-86 (3)
-
U-238/Pb-206 (1)
-
-
-
Lu/Hf (2)
-
metals
-
actinides
-
protactinium (1)
-
thorium (1)
-
uranium
-
U-238/Pb-206 (1)
-
-
-
alkali metals
-
cesium (1)
-
potassium (1)
-
rubidium
-
Rb-87/Sr-86 (2)
-
-
sodium (1)
-
-
alkaline earth metals
-
calcium (1)
-
strontium
-
Rb-87/Sr-86 (2)
-
Sr-87/Sr-86 (3)
-
-
-
gold (1)
-
lead
-
Pb-206/Pb-204 (1)
-
Pb-207/Pb-204 (1)
-
Pb-207/Pb-206 (1)
-
Pb-208/Pb-204 (1)
-
U-238/Pb-206 (1)
-
-
platinum group (2)
-
rare earths
-
neodymium
-
Nd-144/Nd-143 (2)
-
Sm-147/Nd-144 (1)
-
-
samarium
-
Sm-147/Nd-144 (1)
-
-
-
-
oxygen
-
O-18/O-16 (1)
-
-
-
fossils
-
Invertebrata
-
Arthropoda
-
Trilobitomorpha
-
Trilobita
-
Ptychopariida (1)
-
-
-
-
Mollusca
-
Cephalopoda
-
Ammonoidea (1)
-
-
-
Protista
-
Foraminifera (1)
-
-
-
Metazoa (1)
-
microfossils
-
Conodonta (1)
-
-
-
geochronology methods
-
(U-Th)/He (1)
-
Ar/Ar (2)
-
fission-track dating (1)
-
Lu/Hf (2)
-
paleomagnetism (5)
-
Rb/Sr (2)
-
Sm/Nd (1)
-
tephrochronology (1)
-
thermochronology (1)
-
U/Pb (27)
-
U/Th/Pb (3)
-
-
geologic age
-
Cenozoic
-
Tertiary
-
Neogene
-
Miocene (1)
-
-
Paleogene
-
Eocene
-
Crescent Formation (1)
-
lower Eocene (1)
-
upper Eocene (1)
-
-
Oligocene (1)
-
-
-
-
Mesozoic
-
Cretaceous
-
Lower Cretaceous
-
Berriasian (1)
-
-
Upper Cretaceous (1)
-
-
Jurassic
-
Lower Jurassic
-
Laberge Group (1)
-
-
Middle Jurassic
-
Aalenian (1)
-
-
-
Triassic
-
Upper Triassic (2)
-
-
upper Mesozoic (1)
-
-
Paleozoic
-
Cambrian
-
Upper Cambrian
-
Furongian (1)
-
Steptoean (1)
-
-
-
Carboniferous
-
Lower Carboniferous
-
Asbian (1)
-
Dinantian (1)
-
-
Mississippian
-
Lower Mississippian
-
Tournaisian (1)
-
-
Middle Mississippian
-
Visean (1)
-
-
-
Namurian (1)
-
Pennsylvanian
-
Upper Pennsylvanian
-
Kasimovian (1)
-
-
-
Upper Carboniferous
-
Westphalian (1)
-
-
-
middle Paleozoic (1)
-
Ordovician
-
Upper Ordovician (1)
-
-
Permian
-
Ecca Group (1)
-
Lower Permian
-
Cisuralian
-
Artinskian (2)
-
Kungurian (1)
-
-
-
Vryheid Formation (1)
-
-
Silurian
-
Lower Silurian (1)
-
-
-
Precambrian
-
Archean
-
Mesoarchean (1)
-
-
Kingston Peak Formation (1)
-
upper Precambrian
-
Proterozoic
-
Mesoproterozoic (1)
-
Neoproterozoic
-
Cryogenian (3)
-
Marinoan (2)
-
Sturtian (2)
-
-
Paleoproterozoic
-
Orosirian (1)
-
Statherian (1)
-
-
Pocatello Formation (2)
-
-
-
Ventersdorp Supergroup (1)
-
Waterberg System (1)
-
-
-
igneous rocks
-
igneous rocks
-
carbonatites (1)
-
plutonic rocks
-
diabase (1)
-
diorites
-
quartz diorites (1)
-
tonalite (2)
-
trondhjemite (1)
-
-
gabbros (1)
-
granites
-
adamellite (1)
-
aplite (1)
-
A-type granites (1)
-
monzogranite (1)
-
-
granodiorites (3)
-
pegmatite (2)
-
syenites
-
nepheline syenite (1)
-
-
ultramafics
-
peridotites
-
lherzolite (1)
-
-
-
-
volcanic rocks
-
basalts
-
alkali basalts (1)
-
tholeiite (1)
-
tholeiitic basalt (1)
-
-
pyroclastics
-
ignimbrite (1)
-
tuff (4)
-
tuffite (1)
-
-
rhyolites (2)
-
-
-
volcanic ash (1)
-
-
metamorphic rocks
-
metamorphic rocks
-
gneisses
-
biotite gneiss (1)
-
orthogneiss (1)
-
-
granulites (1)
-
metaigneous rocks
-
metadacite (1)
-
-
metasedimentary rocks (1)
-
mylonites
-
blastomylonite (2)
-
-
schists
-
greenstone (1)
-
-
-
-
minerals
-
carbonates
-
calcite (1)
-
-
oxides
-
baddeleyite (1)
-
hematite (1)
-
magnetite (1)
-
-
phosphates
-
apatite (2)
-
monazite (1)
-
-
silicates
-
framework silicates
-
feldspar group
-
alkali feldspar (1)
-
-
silica minerals
-
quartz (1)
-
-
-
orthosilicates
-
nesosilicates
-
garnet group (2)
-
titanite group
-
titanite (2)
-
-
zircon group
-
zircon (19)
-
-
-
-
sheet silicates
-
clay minerals
-
smectite (1)
-
-
illite (1)
-
mica group
-
biotite (2)
-
glauconite (1)
-
muscovite (1)
-
-
-
-
sulfides (1)
-
-
Primary terms
-
absolute age (26)
-
Africa
-
Southern Africa
-
Kaapvaal Craton (1)
-
Karoo Basin (1)
-
South Africa
-
Bushveld Complex (1)
-
KwaZulu-Natal South Africa (1)
-
Limpopo South Africa (1)
-
-
-
-
Asia
-
Far East
-
China
-
Hong Kong (1)
-
Inner Mongolia China (1)
-
Ordos Basin (1)
-
Yunnan China
-
Chengjiang China (1)
-
-
-
Mongolia (1)
-
-
Siberia (1)
-
Yakutia Russian Federation
-
Indigirka River (1)
-
Udachnaya Pipe (1)
-
-
-
Australasia
-
Australia
-
New South Wales Australia (1)
-
-
-
biogeography (1)
-
Canada
-
Eastern Canada
-
Quebec
-
Manicouagan Crater (1)
-
-
-
Stikinia Terrane (1)
-
Western Canada
-
Canadian Cordillera (1)
-
Yukon Territory
-
Whitehorse Yukon Territory (1)
-
-
-
Whitehorse Trough (1)
-
-
carbon
-
C-13/C-12 (1)
-
organic carbon (1)
-
-
Cenozoic
-
Tertiary
-
Neogene
-
Miocene (1)
-
-
Paleogene
-
Eocene
-
Crescent Formation (1)
-
lower Eocene (1)
-
upper Eocene (1)
-
-
Oligocene (1)
-
-
-
-
chemical analysis (1)
-
crust (2)
-
crystal growth (1)
-
data processing (1)
-
deformation (2)
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diagenesis (1)
-
Europe
-
Lapland (1)
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Murmansk Russian Federation (1)
-
Southern Europe
-
Iberian Peninsula
-
Portugal
-
Evora Portugal (1)
-
-
-
-
Western Europe
-
France
-
Var France
-
Maures Massif (1)
-
-
-
Scandinavia
-
Norway
-
Finnmark Norway
-
Seiland (1)
-
-
Northern Norway (1)
-
Soroy (1)
-
-
-
United Kingdom
-
Great Britain
-
Scotland (1)
-
-
-
-
-
faults (5)
-
foliation (2)
-
gems (1)
-
geochronology (3)
-
glacial geology (2)
-
igneous rocks
-
carbonatites (1)
-
plutonic rocks
-
diabase (1)
-
diorites
-
quartz diorites (1)
-
tonalite (2)
-
trondhjemite (1)
-
-
gabbros (1)
-
granites
-
adamellite (1)
-
aplite (1)
-
A-type granites (1)
-
monzogranite (1)
-
-
granodiorites (3)
-
pegmatite (2)
-
syenites
-
nepheline syenite (1)
-
-
ultramafics
-
peridotites
-
lherzolite (1)
-
-
-
-
volcanic rocks
-
basalts
-
alkali basalts (1)
-
tholeiite (1)
-
tholeiitic basalt (1)
-
-
pyroclastics
-
ignimbrite (1)
-
tuff (4)
-
tuffite (1)
-
-
rhyolites (2)
-
-
-
inclusions (2)
-
intrusions (6)
-
Invertebrata
-
Arthropoda
-
Trilobitomorpha
-
Trilobita
-
Ptychopariida (1)
-
-
-
-
Mollusca
-
Cephalopoda
-
Ammonoidea (1)
-
-
-
Protista
-
Foraminifera (1)
-
-
-
isotopes
-
radioactive isotopes
-
Pb-206/Pb-204 (1)
-
Pb-207/Pb-204 (1)
-
Pb-208/Pb-204 (1)
-
Rb-87/Sr-86 (2)
-
Sm-147/Nd-144 (1)
-
U-238/Pb-206 (1)
-
-
stable isotopes
-
C-13/C-12 (1)
-
Nd-144/Nd-143 (2)
-
O-18/O-16 (1)
-
Pb-206/Pb-204 (1)
-
Pb-207/Pb-204 (1)
-
Pb-207/Pb-206 (1)
-
Pb-208/Pb-204 (1)
-
Rb-87/Sr-86 (2)
-
Sm-147/Nd-144 (1)
-
Sr-87/Sr-86 (3)
-
U-238/Pb-206 (1)
-
-
-
lava (1)
-
lineation (1)
-
magmas (2)
-
mantle (1)
-
Mesozoic
-
Cretaceous
-
Lower Cretaceous
-
Berriasian (1)
-
-
Upper Cretaceous (1)
-
-
Jurassic
-
Lower Jurassic
-
Laberge Group (1)
-
-
Middle Jurassic
-
Aalenian (1)
-
-
-
Triassic
-
Upper Triassic (2)
-
-
upper Mesozoic (1)
-
-
metal ores
-
gold ores (1)
-
-
metals
-
actinides
-
protactinium (1)
-
thorium (1)
-
uranium
-
U-238/Pb-206 (1)
-
-
-
alkali metals
-
cesium (1)
-
potassium (1)
-
rubidium
-
Rb-87/Sr-86 (2)
-
-
sodium (1)
-
-
alkaline earth metals
-
calcium (1)
-
strontium
-
Rb-87/Sr-86 (2)
-
Sr-87/Sr-86 (3)
-
-
-
gold (1)
-
lead
-
Pb-206/Pb-204 (1)
-
Pb-207/Pb-204 (1)
-
Pb-207/Pb-206 (1)
-
Pb-208/Pb-204 (1)
-
U-238/Pb-206 (1)
-
-
platinum group (2)
-
rare earths
-
neodymium
-
Nd-144/Nd-143 (2)
-
Sm-147/Nd-144 (1)
-
-
samarium
-
Sm-147/Nd-144 (1)
-
-
-
-
metamorphic rocks
-
gneisses
-
biotite gneiss (1)
-
orthogneiss (1)
-
-
granulites (1)
-
metaigneous rocks
-
metadacite (1)
-
-
metasedimentary rocks (1)
-
mylonites
-
blastomylonite (2)
-
-
schists
-
greenstone (1)
-
-
-
metamorphism (6)
-
metasomatism (4)
-
North America
-
Basin and Range Province
-
Great Basin (1)
-
-
Canadian Shield
-
Grenville Province (1)
-
-
Intermontane Belt (1)
-
Keweenawan Rift (1)
-
North American Cordillera
-
Canadian Cordillera (1)
-
-
North American Craton (1)
-
Yukon-Tanana Terrane (1)
-
-
orogeny (2)
-
oxygen
-
O-18/O-16 (1)
-
-
paleogeography (4)
-
paleomagnetism (5)
-
Paleozoic
-
Cambrian
-
Upper Cambrian
-
Furongian (1)
-
Steptoean (1)
-
-
-
Carboniferous
-
Lower Carboniferous
-
Asbian (1)
-
Dinantian (1)
-
-
Mississippian
-
Lower Mississippian
-
Tournaisian (1)
-
-
Middle Mississippian
-
Visean (1)
-
-
-
Namurian (1)
-
Pennsylvanian
-
Upper Pennsylvanian
-
Kasimovian (1)
-
-
-
Upper Carboniferous
-
Westphalian (1)
-
-
-
middle Paleozoic (1)
-
Ordovician
-
Upper Ordovician (1)
-
-
Permian
-
Ecca Group (1)
-
Lower Permian
-
Cisuralian
-
Artinskian (2)
-
Kungurian (1)
-
-
-
Vryheid Formation (1)
-
-
Silurian
-
Lower Silurian (1)
-
-
-
petrology (1)
-
phase equilibria (2)
-
plate tectonics (6)
-
Precambrian
-
Archean
-
Mesoarchean (1)
-
-
Kingston Peak Formation (1)
-
upper Precambrian
-
Proterozoic
-
Mesoproterozoic (1)
-
Neoproterozoic
-
Cryogenian (3)
-
Marinoan (2)
-
Sturtian (2)
-
-
Paleoproterozoic
-
Orosirian (1)
-
Statherian (1)
-
-
Pocatello Formation (2)
-
-
-
Ventersdorp Supergroup (1)
-
Waterberg System (1)
-
-
sedimentary rocks
-
carbonate rocks
-
boundstone (1)
-
dolostone (1)
-
grainstone (1)
-
-
clastic rocks
-
bentonite (1)
-
conglomerate (4)
-
diamictite (2)
-
graywacke (1)
-
mudstone (1)
-
orthoquartzite (1)
-
sandstone (4)
-
siltstone (2)
-
tonstein (1)
-
-
coal (1)
-
-
sedimentary structures
-
biogenic structures
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bioturbation (1)
-
thrombolites (1)
-
-
-
sedimentation (2)
-
sediments
-
clastic sediments
-
cobbles (1)
-
-
-
South America
-
Andes
-
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isotope dilution
Novel age constraints for the onset of the Steptoean Positive Isotopic Carbon Excursion (SPICE) and the late Cambrian time scale using high-precision U-Pb detrital zircon ages
Sheared and Granular Peridotites from the Udachnaya–East Kimberlite (Yakutia): Mineralogy, Chemistry, and PGE Patterns
Metamorphism of the Korvatundra Structure of the Lapland–Kola Orogen (Arctic Zone of the Fennoscandian Shield)
Geodynamic Formation Conditions and Age of Granitoids from Small Intrusions in the West of the Yana–Kolyma Gold Belt (Northeast Asia)
A robust age model for the Cryogenian Pocatello Formation of southeastern Idaho (northwestern USA) from tandem in situ and isotope dilution U-Pb dating of volcanic tuffs and epiclastic detrital zircons
Final inversion of the Midcontinent Rift during the Rigolet Phase of the Grenvillian Orogeny
ABSTRACT The Manicouagan impact event has been the subject of multiple age determinations over the past ~50 yr, providing an ideal test site for evaluating the viability of different geochronometers. This study highlights the suitability of Manicouagan’s essentially pristine impact melt body as a medium for providing insight into the U-Pb isotope systematics of geochronometers in the absence of shock-related overprinting. We performed in situ laser-ablation–inductively coupled plasma–mass spectrometry (LA-ICP-MS) U-Pb geochronology on apatite and zircon, both of which crystallized as primary phases. This study is the first application of U-Pb geochronology to apatite crystallized within a terrestrial impact melt sheet. U-Pb analyses were obtained from 200 melt-grown apatite grains ( n = 222 spots), with a data subset providing a lower-intercept age of 212.5 ± 8.0 Ma. For melt-grown zircon, a total of 30 analyses from 28 grains were obtained, with a subset of the data yielding a lower-intercept age of 213.1 ± 1.6 Ma. The lower precision (±8.0 Ma; ±3%) obtained from apatite is a consequence of low U and a high and variable common-Pb composition. This resulted from localized Pb*/Pb C heterogeneity within the impact melt sheet that was incorporated into the apatite crystal structure during crystallization (where Pb*/Pb C is the ratio of radiogenic Pb to common Pb). While considered a limitation to the precision obtainable from melt-grown apatite, its ability to record local-scale isotopic variations highlights an advantage of U-Pb studies on melt-grown apatite. The best-estimate ages from zircon and apatite overlap within error and correlate with previously determined ages for the Manicouagan impact event. An average formation age from the new determinations, combined with previous age constraints, yields a weighted mean age of 214.96 ± 0.30 Ma for the Manicouagan impact structure.