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
-
East Africa
-
Afar Depression (1)
-
Ethiopia (1)
-
Ethiopian Rift (1)
-
-
Southern Africa
-
Namibia (1)
-
South Africa
-
Western Cape Province South Africa (1)
-
-
-
-
Altiplano (1)
-
Arctic Ocean (1)
-
Arctic region
-
Greenland
-
East Greenland (1)
-
-
-
Asia
-
Altai-Sayan region (2)
-
Amur region (2)
-
Amur Russian Federation (1)
-
Arabian Peninsula
-
Yemen (1)
-
-
Buryat Russian Federation (3)
-
Central Asia
-
Pamirs (1)
-
-
Chukotka Russian Federation
-
Chukchi Peninsula (1)
-
-
Dzhugdzhur region (1)
-
Far East
-
Burma (2)
-
China
-
Anhui China (1)
-
Da Hinggan Ling (1)
-
Dabie Mountains (2)
-
Henan China (1)
-
North China Platform (4)
-
Qinling Mountains (2)
-
Sichuan China (1)
-
Xinjiang China (1)
-
Xizang China
-
Lhasa Block (1)
-
-
Yunnan China
-
Tengchong (1)
-
-
-
Indonesia
-
Tambora (1)
-
-
Japan
-
Hokkaido (1)
-
-
Lesser Sunda Islands
-
Tambora (1)
-
-
Mongolia (2)
-
-
Kamchatka Russian Federation
-
Kamchatka Peninsula
-
Bezymyannyy (1)
-
Klyuchevskaya Sopka (1)
-
Tolbachik (1)
-
-
-
Magadan Russian Federation (1)
-
Middle East
-
Iran
-
Elburz (1)
-
-
Turkey
-
Istanbul Turkey (1)
-
North Anatolian Fault (1)
-
-
-
Okhotsk region (1)
-
Okhotsk-Chukchi volcanic belt (2)
-
Qiangtang Terrane (1)
-
Russian Far East (1)
-
Sakhalin Russian Federation
-
Sakhalin (1)
-
-
Sayan
-
Eastern Sayan (1)
-
-
Selenga River valley (1)
-
Siberia (1)
-
Stanovoy Range (2)
-
Tibetan Plateau (2)
-
Tien Shan (1)
-
Transbaikalia (2)
-
Tuva Russian Federation (1)
-
Uzbekistan
-
Bukantau (1)
-
-
Western Transbaikalia (2)
-
Zabaykalskiy Russian Federation (1)
-
-
Atlantic Ocean
-
North Atlantic
-
North Sea (1)
-
-
-
Atlantic Ocean Islands
-
Canary Islands (1)
-
Faeroe Islands (1)
-
-
Australasia
-
Australia
-
New South Wales Australia (1)
-
-
Papua New Guinea (1)
-
-
Caledonides (1)
-
Canada
-
Eastern Canada
-
Maritime Provinces
-
Nova Scotia (1)
-
-
Quebec (1)
-
-
Western Canada
-
British Columbia
-
Rossland British Columbia (1)
-
-
Yukon Territory (1)
-
-
-
Cascade Range (2)
-
Cascadia subduction zone (1)
-
Commonwealth of Independent States
-
Caucasus
-
Lesser Caucasus (1)
-
-
Georgian Republic (1)
-
Russian Federation
-
Amur region (2)
-
Amur Russian Federation (1)
-
Buryat Russian Federation (3)
-
Chukotka Russian Federation
-
Chukchi Peninsula (1)
-
-
Dzhugdzhur region (1)
-
Kamchatka Russian Federation
-
Kamchatka Peninsula
-
Bezymyannyy (1)
-
Klyuchevskaya Sopka (1)
-
Tolbachik (1)
-
-
-
Karelia Russian Federation (1)
-
Magadan Russian Federation (1)
-
Okhotsk region (1)
-
Okhotsk-Chukchi volcanic belt (2)
-
Russian Far East (1)
-
Sakhalin Russian Federation
-
Sakhalin (1)
-
-
Stanovoy Range (2)
-
Transbaikalia (2)
-
Tuva Russian Federation (1)
-
Western Transbaikalia (2)
-
Zabaykalskiy Russian Federation (1)
-
-
Uzbekistan
-
Bukantau (1)
-
-
-
Davis Strait (1)
-
Europe
-
Carpathians (2)
-
Caucasus
-
Lesser Caucasus (1)
-
-
Central Europe
-
Czech Republic
-
Moravia (1)
-
-
-
Georgian Republic (1)
-
Karelia Russian Federation (1)
-
Lake Ladoga region (1)
-
Southern Europe
-
Croatia (1)
-
Dalmatia (1)
-
Greece
-
Greek Aegean Islands
-
Lesbos (1)
-
-
-
Italy
-
Campania Italy
-
Monte Somma (1)
-
Vesuvius (1)
-
-
Latium Italy (1)
-
Sardinia Italy (1)
-
-
Romania
-
Transylvanian Alps (1)
-
-
-
Variscides (1)
-
Western Europe
-
France
-
Auvergne (1)
-
Cantal France
-
Cantal Massif (1)
-
-
Central Massif
-
Cantal Massif (1)
-
-
Puy-de-Dome France
-
Mont-Dore France (1)
-
-
-
Iceland
-
Eyjafjallajokull (1)
-
-
Ireland
-
Donegal Ireland
-
Ardara Pluton (1)
-
-
Limerick Ireland (1)
-
-
Scandinavia
-
Denmark (1)
-
Sweden
-
Norrbotten Sweden
-
Kiruna Sweden (1)
-
-
-
-
-
-
Indian Ocean
-
Arabian Sea
-
Gulf of Aden (1)
-
-
Red Sea (1)
-
-
Mediterranean region
-
Aegean Islands
-
Greek Aegean Islands
-
Lesbos (1)
-
-
-
-
Mediterranean Sea
-
East Mediterranean
-
Aegean Sea (2)
-
-
-
Mexico
-
Baja California Mexico (1)
-
Baja California Sur Mexico (2)
-
Chihuahua Mexico (1)
-
Jalisco Mexico (1)
-
Nayarit Mexico (1)
-
Trans-Mexican volcanic belt (1)
-
-
North America
-
Basin and Range Province
-
Great Basin (1)
-
-
Canadian Shield
-
Superior Province (2)
-
-
Rocky Mountains
-
Southern Rocky Mountains (1)
-
U. S. Rocky Mountains
-
Absaroka Range (2)
-
San Juan Mountains (2)
-
Sawatch Range (1)
-
-
-
-
Oceania
-
Melanesia
-
Fiji
-
Viti Levu (1)
-
-
Vanuatu (1)
-
-
Polynesia
-
French Polynesia
-
Society Islands
-
Tahiti (1)
-
-
-
Pitcairn Island (1)
-
-
-
Pacific Ocean
-
East Pacific
-
Northeast Pacific
-
Cascadia Basin (1)
-
Gulf of California
-
Guaymas Basin (1)
-
-
Middle America Trench (1)
-
-
-
North Pacific
-
Northeast Pacific
-
Cascadia Basin (1)
-
Gulf of California
-
Guaymas Basin (1)
-
-
Middle America Trench (1)
-
-
-
West Pacific (1)
-
-
Pacific region
-
Circum-Pacific region (1)
-
-
Puna (1)
-
San Juan Basin (1)
-
Sierra Nevada (6)
-
South America
-
Andes
-
Central Andes (1)
-
Western Cordillera (1)
-
-
Argentina (1)
-
Brazil
-
Rio Grande do Sul Brazil (1)
-
-
Peru
-
Puno Peru (1)
-
-
-
United States
-
Arizona
-
Yavapai County Arizona (2)
-
-
California
-
Central California (1)
-
Fresno County California (3)
-
Mono County California (1)
-
Nevada County California (1)
-
Northern California (1)
-
Plumas County California (1)
-
Sierra County California (1)
-
Sierra Nevada Batholith (1)
-
-
Colorado
-
Chaffee County Colorado (1)
-
Colorado mineral belt (1)
-
Gunnison County Colorado (1)
-
Lake County Colorado (1)
-
Mineral County Colorado (1)
-
Pitkin County Colorado (1)
-
San Juan volcanic field (2)
-
Sawatch Range (1)
-
Teller County Colorado
-
Cripple Creek Colorado (1)
-
-
-
Great Basin (1)
-
Idaho (1)
-
Lake Tahoe (1)
-
Nevada
-
Esmeralda County Nevada (1)
-
Nevada Test Site (1)
-
Nye County Nevada
-
Yucca Mountain (1)
-
-
White Pine County Nevada (1)
-
-
New Mexico
-
Dona Ana County New Mexico (1)
-
-
New York
-
Tompkins County New York
-
Ithaca New York (1)
-
-
-
Oregon
-
Harney County Oregon
-
Steens Mountain (1)
-
-
-
Texas
-
El Paso County Texas
-
El Paso Texas (1)
-
-
Hudspeth County Texas (1)
-
-
Trans-Pecos (1)
-
U. S. Rocky Mountains
-
Absaroka Range (2)
-
San Juan Mountains (2)
-
Sawatch Range (1)
-
-
Utah
-
Piute County Utah
-
Marysvale Utah (1)
-
-
-
Washington (1)
-
Wyoming (3)
-
-
-
commodities
-
bentonite deposits (1)
-
clay deposits (1)
-
diamond deposits (1)
-
gems (1)
-
industrial minerals (1)
-
kaolin deposits (1)
-
magnesite deposits (1)
-
metal ores
-
copper ores (5)
-
gold ores (13)
-
iron ores (2)
-
mercury ores (1)
-
molybdenum ores (5)
-
polymetallic ores (2)
-
silver ores (4)
-
tellurium ores (1)
-
tin ores (2)
-
tungsten ores (2)
-
-
mineral deposits, genesis (16)
-
mineral exploration (1)
-
phosphate deposits (1)
-
potash (1)
-
-
elements, isotopes
-
carbon
-
C-13/C-12 (2)
-
C-14 (1)
-
-
chemical elements (1)
-
chemical ratios (1)
-
hydrogen
-
D/H (1)
-
deuterium (1)
-
-
incompatible elements (1)
-
isotope ratios (30)
-
isotopes
-
radioactive isotopes
-
Ar-40/Ar-39 (1)
-
C-14 (1)
-
Pb-206/Pb-204 (3)
-
Pb-207/Pb-204 (3)
-
Pb-208/Pb-204 (3)
-
Rb-87/Sr-86 (2)
-
Sm-147/Nd-144 (2)
-
-
stable isotopes
-
Ar-40/Ar-39 (1)
-
C-13/C-12 (2)
-
D/H (1)
-
deuterium (1)
-
Hf-177/Hf-176 (5)
-
Nd-144/Nd-143 (13)
-
O-18/O-16 (10)
-
Os-188/Os-187 (1)
-
Pb-206/Pb-204 (3)
-
Pb-207/Pb-204 (3)
-
Pb-207/Pb-206 (1)
-
Pb-208/Pb-204 (3)
-
Rb-87/Sr-86 (2)
-
S-34/S-32 (2)
-
Sm-147/Nd-144 (2)
-
Sr-87/Sr-86 (21)
-
-
-
metals
-
alkali metals
-
potassium (4)
-
rubidium
-
Rb-87/Sr-86 (2)
-
-
-
alkaline earth metals
-
barium (1)
-
calcium (2)
-
strontium
-
Rb-87/Sr-86 (2)
-
Sr-87/Sr-86 (21)
-
-
-
copper (1)
-
gold (1)
-
hafnium
-
Hf-177/Hf-176 (5)
-
-
iron (2)
-
lead
-
Pb-206/Pb-204 (3)
-
Pb-207/Pb-204 (3)
-
Pb-207/Pb-206 (1)
-
Pb-208/Pb-204 (3)
-
-
manganese (1)
-
molybdenum (1)
-
niobium (1)
-
platinum group
-
osmium
-
Os-188/Os-187 (1)
-
-
-
precious metals (3)
-
rare earths
-
europium (1)
-
lutetium (1)
-
neodymium
-
Nd-144/Nd-143 (13)
-
Sm-147/Nd-144 (2)
-
-
samarium
-
Sm-147/Nd-144 (2)
-
-
-
titanium (2)
-
zinc (1)
-
zirconium (2)
-
-
nitrogen (1)
-
noble gases
-
argon
-
Ar-40/Ar-39 (1)
-
-
-
oxygen
-
O-18/O-16 (10)
-
-
sulfur
-
S-34/S-32 (2)
-
-
tellurium (1)
-
-
fossils
-
microfossils (1)
-
Plantae
-
algae
-
diatoms (1)
-
-
-
-
geochronology methods
-
(U-Th)/He (1)
-
Ar/Ar (14)
-
fission-track dating (1)
-
He/He (1)
-
K/Ar (13)
-
Nd/Nd (1)
-
paleomagnetism (2)
-
Rb/Sr (8)
-
Re/Os (1)
-
Sm/Nd (1)
-
Sr/Sr (1)
-
Th/U (1)
-
U/Pb (19)
-
U/Th/Pb (2)
-
-
geologic age
-
Cenozoic
-
middle Cenozoic (1)
-
Quaternary
-
Holocene
-
upper Holocene (1)
-
-
Pleistocene
-
upper Pleistocene (2)
-
-
upper Quaternary (1)
-
-
Tertiary
-
lower Tertiary (1)
-
Neogene
-
Miocene
-
Columbia River Basalt Group (1)
-
lower Miocene (2)
-
Paintbrush Tuff (1)
-
upper Miocene (4)
-
-
Pliocene (9)
-
-
Paleogene
-
Eocene
-
lower Eocene (1)
-
upper Eocene (1)
-
-
Oligocene
-
Fish Canyon Tuff (1)
-
-
Paleocene
-
upper Paleocene (1)
-
-
-
-
upper Cenozoic (1)
-
-
Mesozoic
-
Cretaceous
-
Lower Cretaceous (9)
-
Middle Cretaceous (1)
-
Upper Cretaceous
-
Campanian (1)
-
Turonian (1)
-
-
-
Jurassic
-
Lower Jurassic (1)
-
Middle Jurassic (1)
-
Upper Jurassic (2)
-
-
lower Mesozoic (1)
-
upper Mesozoic (2)
-
-
Paleozoic
-
Cambrian (2)
-
Carboniferous
-
Mississippian (1)
-
-
Devonian
-
Upper Devonian (1)
-
-
lower Paleozoic (1)
-
Ordovician
-
Middle Ordovician
-
Darriwilian (1)
-
-
Upper Ordovician (1)
-
-
Permian
-
Upper Permian (2)
-
-
Silurian
-
Middle Silurian (1)
-
-
upper Paleozoic (1)
-
-
Precambrian
-
Archean
-
Neoarchean (1)
-
-
upper Precambrian
-
Proterozoic
-
Neoproterozoic
-
Riphean (1)
-
-
Paleoproterozoic
-
Orosirian (1)
-
Qinling Group (1)
-
-
Sinian (1)
-
-
-
-
-
igneous rocks
-
igneous rocks
-
hypabyssal rocks (2)
-
kimberlite (1)
-
picrite (2)
-
plutonic rocks
-
diabase (1)
-
diorites (3)
-
essexite (2)
-
gabbros (3)
-
granites
-
alkali granites (3)
-
A-type granites (1)
-
granosyenite (1)
-
leucogranite (1)
-
monzogranite (1)
-
-
granodiorites (7)
-
lamprophyres
-
minette (2)
-
-
monzodiorite (4)
-
monzonites (3)
-
pegmatite (1)
-
syenites
-
granosyenite (1)
-
syenite porphyry (1)
-
-
ultramafics
-
chromitite (1)
-
peridotites
-
spinel lherzolite (1)
-
-
pyroxenite
-
garnet pyroxenite (1)
-
websterite (1)
-
-
-
-
porphyry (3)
-
volcanic rocks
-
adakites (2)
-
andesites (21)
-
basalts
-
alkali basalts
-
mugearite (1)
-
trachybasalts (14)
-
-
flood basalts (1)
-
mid-ocean ridge basalts (3)
-
ocean-island basalts (4)
-
olivine basalt (1)
-
shoshonite (13)
-
tholeiite (3)
-
tholeiitic basalt (1)
-
-
basanite
-
ankaramite (1)
-
-
dacites (11)
-
glasses
-
volcanic glass (1)
-
-
komatiite (1)
-
latite (19)
-
phonolites (4)
-
pyroclastics
-
andesite tuff (1)
-
ash-flow tuff (2)
-
ignimbrite (4)
-
pumice (1)
-
rhyolite tuff (3)
-
tuff (11)
-
-
rhyodacites (1)
-
rhyolites
-
comendite (3)
-
pantellerite (1)
-
-
tephrite (1)
-
trachyandesites
-
absarokite (14)
-
-
trachytes (10)
-
-
-
volcanic ash (1)
-
-
metamorphic rocks
-
metamorphic rocks
-
eclogite (1)
-
gneisses (1)
-
hornfels (1)
-
metasomatic rocks
-
skarn (1)
-
-
-
-
meteorites
-
meteorites
-
stony meteorites
-
achondrites
-
angrite (1)
-
eucrite (1)
-
-
-
-
-
minerals
-
alloys
-
carbides
-
moissanite (1)
-
-
-
carbonates
-
calcite (1)
-
dolomite (1)
-
magnesite (1)
-
-
minerals (1)
-
native elements
-
diamond (1)
-
-
oxides
-
anatase (1)
-
chrome spinel (1)
-
chromite (2)
-
hydroxides
-
iron hydroxides (1)
-
oxyhydroxides (1)
-
-
ilmenite (2)
-
iron oxides (1)
-
magnetite (1)
-
spinel (1)
-
zirconolite (1)
-
-
phosphates
-
apatite (3)
-
monazite (1)
-
-
silicates
-
chain silicates
-
amphibole group
-
clinoamphibole
-
kaersutite (1)
-
-
-
pyroxene group
-
clinopyroxene
-
aegirine (1)
-
diopside (1)
-
-
orthopyroxene (1)
-
-
-
framework silicates
-
feldspar group
-
alkali feldspar
-
sanidine (1)
-
-
plagioclase (6)
-
-
nepheline group
-
nepheline (1)
-
-
silica minerals
-
quartz (2)
-
-
zeolite group
-
chabazite (1)
-
mordenite (1)
-
phillipsite (1)
-
-
-
orthosilicates
-
nesosilicates
-
olivine group
-
forsterite (1)
-
olivine (4)
-
-
zircon group
-
zircon (15)
-
-
-
sorosilicates
-
chevkinite group (1)
-
-
-
sheet silicates
-
chlorite group
-
chlorite (1)
-
-
clay minerals
-
halloysite (2)
-
kaolinite (2)
-
montmorillonite (1)
-
smectite (3)
-
-
illite (1)
-
mica group
-
biotite (3)
-
-
-
-
sulfates
-
alunite (2)
-
anhydrite (2)
-
-
sulfides
-
pyrrhotite (1)
-
-
tellurides (1)
-
-
Primary terms
-
absolute age (44)
-
Africa
-
East Africa
-
Afar Depression (1)
-
Ethiopia (1)
-
Ethiopian Rift (1)
-
-
Southern Africa
-
Namibia (1)
-
South Africa
-
Western Cape Province South Africa (1)
-
-
-
-
Arctic Ocean (1)
-
Arctic region
-
Greenland
-
East Greenland (1)
-
-
-
Asia
-
Altai-Sayan region (2)
-
Amur region (2)
-
Amur Russian Federation (1)
-
Arabian Peninsula
-
Yemen (1)
-
-
Buryat Russian Federation (3)
-
Central Asia
-
Pamirs (1)
-
-
Chukotka Russian Federation
-
Chukchi Peninsula (1)
-
-
Dzhugdzhur region (1)
-
Far East
-
Burma (2)
-
China
-
Anhui China (1)
-
Da Hinggan Ling (1)
-
Dabie Mountains (2)
-
Henan China (1)
-
North China Platform (4)
-
Qinling Mountains (2)
-
Sichuan China (1)
-
Xinjiang China (1)
-
Xizang China
-
Lhasa Block (1)
-
-
Yunnan China
-
Tengchong (1)
-
-
-
Indonesia
-
Tambora (1)
-
-
Japan
-
Hokkaido (1)
-
-
Lesser Sunda Islands
-
Tambora (1)
-
-
Mongolia (2)
-
-
Kamchatka Russian Federation
-
Kamchatka Peninsula
-
Bezymyannyy (1)
-
Klyuchevskaya Sopka (1)
-
Tolbachik (1)
-
-
-
Magadan Russian Federation (1)
-
Middle East
-
Iran
-
Elburz (1)
-
-
Turkey
-
Istanbul Turkey (1)
-
North Anatolian Fault (1)
-
-
-
Okhotsk region (1)
-
Okhotsk-Chukchi volcanic belt (2)
-
Qiangtang Terrane (1)
-
Russian Far East (1)
-
Sakhalin Russian Federation
-
Sakhalin (1)
-
-
Sayan
-
Eastern Sayan (1)
-
-
Selenga River valley (1)
-
Siberia (1)
-
Stanovoy Range (2)
-
Tibetan Plateau (2)
-
Tien Shan (1)
-
Transbaikalia (2)
-
Tuva Russian Federation (1)
-
Uzbekistan
-
Bukantau (1)
-
-
Western Transbaikalia (2)
-
Zabaykalskiy Russian Federation (1)
-
-
associations (2)
-
Atlantic Ocean
-
North Atlantic
-
North Sea (1)
-
-
-
Atlantic Ocean Islands
-
Canary Islands (1)
-
Faeroe Islands (1)
-
-
Australasia
-
Australia
-
New South Wales Australia (1)
-
-
Papua New Guinea (1)
-
-
bentonite deposits (1)
-
bibliography (2)
-
Canada
-
Eastern Canada
-
Maritime Provinces
-
Nova Scotia (1)
-
-
Quebec (1)
-
-
Western Canada
-
British Columbia
-
Rossland British Columbia (1)
-
-
Yukon Territory (1)
-
-
-
carbon
-
C-13/C-12 (2)
-
C-14 (1)
-
-
Cenozoic
-
middle Cenozoic (1)
-
Quaternary
-
Holocene
-
upper Holocene (1)
-
-
Pleistocene
-
upper Pleistocene (2)
-
-
upper Quaternary (1)
-
-
Tertiary
-
lower Tertiary (1)
-
Neogene
-
Miocene
-
Columbia River Basalt Group (1)
-
lower Miocene (2)
-
Paintbrush Tuff (1)
-
upper Miocene (4)
-
-
Pliocene (9)
-
-
Paleogene
-
Eocene
-
lower Eocene (1)
-
upper Eocene (1)
-
-
Oligocene
-
Fish Canyon Tuff (1)
-
-
Paleocene
-
upper Paleocene (1)
-
-
-
-
upper Cenozoic (1)
-
-
chemical analysis (1)
-
clay deposits (1)
-
clay mineralogy (2)
-
crust (13)
-
crystal chemistry (3)
-
crystal growth (3)
-
dams (1)
-
deformation (1)
-
diagenesis (1)
-
diamond deposits (1)
-
earthquakes (1)
-
economic geology (6)
-
Europe
-
Carpathians (2)
-
Caucasus
-
Lesser Caucasus (1)
-
-
Central Europe
-
Czech Republic
-
Moravia (1)
-
-
-
Georgian Republic (1)
-
Karelia Russian Federation (1)
-
Lake Ladoga region (1)
-
Southern Europe
-
Croatia (1)
-
Dalmatia (1)
-
Greece
-
Greek Aegean Islands
-
Lesbos (1)
-
-
-
Italy
-
Campania Italy
-
Monte Somma (1)
-
Vesuvius (1)
-
-
Latium Italy (1)
-
Sardinia Italy (1)
-
-
Romania
-
Transylvanian Alps (1)
-
-
-
Variscides (1)
-
Western Europe
-
France
-
Auvergne (1)
-
Cantal France
-
Cantal Massif (1)
-
-
Central Massif
-
Cantal Massif (1)
-
-
Puy-de-Dome France
-
Mont-Dore France (1)
-
-
-
Iceland
-
Eyjafjallajokull (1)
-
-
Ireland
-
Donegal Ireland
-
Ardara Pluton (1)
-
-
Limerick Ireland (1)
-
-
Scandinavia
-
Denmark (1)
-
Sweden
-
Norrbotten Sweden
-
Kiruna Sweden (1)
-
-
-
-
-
-
faults (8)
-
folds (2)
-
gems (1)
-
geochemistry (40)
-
geochronology (5)
-
geomorphology (2)
-
geophysical methods (1)
-
heat flow (2)
-
hydrogen
-
D/H (1)
-
deuterium (1)
-
-
igneous rocks
-
hypabyssal rocks (2)
-
kimberlite (1)
-
picrite (2)
-
plutonic rocks
-
diabase (1)
-
diorites (3)
-
essexite (2)
-
gabbros (3)
-
granites
-
alkali granites (3)
-
A-type granites (1)
-
granosyenite (1)
-
leucogranite (1)
-
monzogranite (1)
-
-
granodiorites (7)
-
lamprophyres
-
minette (2)
-
-
monzodiorite (4)
-
monzonites (3)
-
pegmatite (1)
-
syenites
-
granosyenite (1)
-
syenite porphyry (1)
-
-
ultramafics
-
chromitite (1)
-
peridotites
-
spinel lherzolite (1)
-
-
pyroxenite
-
garnet pyroxenite (1)
-
websterite (1)
-
-
-
-
porphyry (3)
-
volcanic rocks
-
adakites (2)
-
andesites (21)
-
basalts
-
alkali basalts
-
mugearite (1)
-
trachybasalts (14)
-
-
flood basalts (1)
-
mid-ocean ridge basalts (3)
-
ocean-island basalts (4)
-
olivine basalt (1)
-
shoshonite (13)
-
tholeiite (3)
-
tholeiitic basalt (1)
-
-
basanite
-
ankaramite (1)
-
-
dacites (11)
-
glasses
-
volcanic glass (1)
-
-
komatiite (1)
-
latite (19)
-
phonolites (4)
-
pyroclastics
-
andesite tuff (1)
-
ash-flow tuff (2)
-
ignimbrite (4)
-
pumice (1)
-
rhyolite tuff (3)
-
tuff (11)
-
-
rhyodacites (1)
-
rhyolites
-
comendite (3)
-
pantellerite (1)
-
-
tephrite (1)
-
trachyandesites
-
absarokite (14)
-
-
trachytes (10)
-
-
-
inclusions
-
fluid inclusions (7)
-
-
Indian Ocean
-
Arabian Sea
-
Gulf of Aden (1)
-
-
Red Sea (1)
-
-
industrial minerals (1)
-
intrusions (22)
-
isotopes
-
radioactive isotopes
-
Ar-40/Ar-39 (1)
-
C-14 (1)
-
Pb-206/Pb-204 (3)
-
Pb-207/Pb-204 (3)
-
Pb-208/Pb-204 (3)
-
Rb-87/Sr-86 (2)
-
Sm-147/Nd-144 (2)
-
-
stable isotopes
-
Ar-40/Ar-39 (1)
-
C-13/C-12 (2)
-
D/H (1)
-
deuterium (1)
-
Hf-177/Hf-176 (5)
-
Nd-144/Nd-143 (13)
-
O-18/O-16 (10)
-
Os-188/Os-187 (1)
-
Pb-206/Pb-204 (3)
-
Pb-207/Pb-204 (3)
-
Pb-207/Pb-206 (1)
-
Pb-208/Pb-204 (3)
-
Rb-87/Sr-86 (2)
-
S-34/S-32 (2)
-
Sm-147/Nd-144 (2)
-
Sr-87/Sr-86 (21)
-
-
-
kaolin deposits (1)
-
lava (18)
-
magmas (44)
-
magnesite deposits (1)
-
mantle (16)
-
maps (2)
-
marine geology (1)
-
Mediterranean region
-
Aegean Islands
-
Greek Aegean Islands
-
Lesbos (1)
-
-
-
-
Mediterranean Sea
-
East Mediterranean
-
Aegean Sea (2)
-
-
-
Mesozoic
-
Cretaceous
-
Lower Cretaceous (9)
-
Middle Cretaceous (1)
-
Upper Cretaceous
-
Campanian (1)
-
Turonian (1)
-
-
-
Jurassic
-
Lower Jurassic (1)
-
Middle Jurassic (1)
-
Upper Jurassic (2)
-
-
lower Mesozoic (1)
-
upper Mesozoic (2)
-
-
metal ores
-
copper ores (5)
-
gold ores (13)
-
iron ores (2)
-
mercury ores (1)
-
molybdenum ores (5)
-
polymetallic ores (2)
-
silver ores (4)
-
tellurium ores (1)
-
tin ores (2)
-
tungsten ores (2)
-
-
metals
-
alkali metals
-
potassium (4)
-
rubidium
-
Rb-87/Sr-86 (2)
-
-
-
alkaline earth metals
-
barium (1)
-
calcium (2)
-
strontium
-
Rb-87/Sr-86 (2)
-
Sr-87/Sr-86 (21)
-
-
-
copper (1)
-
gold (1)
-
hafnium
-
Hf-177/Hf-176 (5)
-
-
iron (2)
-
lead
-
Pb-206/Pb-204 (3)
-
Pb-207/Pb-204 (3)
-
Pb-207/Pb-206 (1)
-
Pb-208/Pb-204 (3)
-
-
manganese (1)
-
molybdenum (1)
-
niobium (1)
-
platinum group
-
osmium
-
Os-188/Os-187 (1)
-
-
-
precious metals (3)
-
rare earths
-
europium (1)
-
lutetium (1)
-
neodymium
-
Nd-144/Nd-143 (13)
-
Sm-147/Nd-144 (2)
-
-
samarium
-
Sm-147/Nd-144 (2)
-
-
-
titanium (2)
-
zinc (1)
-
zirconium (2)
-
-
metamorphic rocks
-
eclogite (1)
-
gneisses (1)
-
hornfels (1)
-
metasomatic rocks
-
skarn (1)
-
-
-
metasomatism (15)
-
meteorites
-
stony meteorites
-
achondrites
-
angrite (1)
-
eucrite (1)
-
-
-
-
Mexico
-
Baja California Mexico (1)
-
Baja California Sur Mexico (2)
-
Chihuahua Mexico (1)
-
Jalisco Mexico (1)
-
Nayarit Mexico (1)
-
Trans-Mexican volcanic belt (1)
-
-
mineral deposits, genesis (16)
-
mineral exploration (1)
-
mineralogy (3)
-
minerals (1)
-
nitrogen (1)
-
noble gases
-
argon
-
Ar-40/Ar-39 (1)
-
-
-
North America
-
Basin and Range Province
-
Great Basin (1)
-
-
Canadian Shield
-
Superior Province (2)
-
-
Rocky Mountains
-
Southern Rocky Mountains (1)
-
U. S. Rocky Mountains
-
Absaroka Range (2)
-
San Juan Mountains (2)
-
Sawatch Range (1)
-
-
-
-
ocean basins (1)
-
ocean floors (3)
-
Oceania
-
Melanesia
-
Fiji
-
Viti Levu (1)
-
-
Vanuatu (1)
-
-
Polynesia
-
French Polynesia
-
Society Islands
-
Tahiti (1)
-
-
-
Pitcairn Island (1)
-
-
-
orogeny (2)
-
oxygen
-
O-18/O-16 (10)
-
-
Pacific Ocean
-
East Pacific
-
Northeast Pacific
-
Cascadia Basin (1)
-
Gulf of California
-
Guaymas Basin (1)
-
-
Middle America Trench (1)
-
-
-
North Pacific
-
Northeast Pacific
-
Cascadia Basin (1)
-
Gulf of California
-
Guaymas Basin (1)
-
-
Middle America Trench (1)
-
-
-
West Pacific (1)
-
-
Pacific region
-
Circum-Pacific region (1)
-
-
paleogeography (4)
-
paleomagnetism (2)
-
Paleozoic
-
Cambrian (2)
-
Carboniferous
-
Mississippian (1)
-
-
Devonian
-
Upper Devonian (1)
-
-
lower Paleozoic (1)
-
Ordovician
-
Middle Ordovician
-
Darriwilian (1)
-
-
Upper Ordovician (1)
-
-
Permian
-
Upper Permian (2)
-
-
Silurian
-
Middle Silurian (1)
-
-
upper Paleozoic (1)
-
-
paragenesis (3)
-
petrology (22)
-
phase equilibria (4)
-
phosphate deposits (1)
-
Plantae
-
algae
-
diatoms (1)
-
-
-
plate tectonics (22)
-
pollution (1)
-
potash (1)
-
Precambrian
-
Archean
-
Neoarchean (1)
-
-
upper Precambrian
-
Proterozoic
-
Neoproterozoic
-
Riphean (1)
-
-
Paleoproterozoic
-
Orosirian (1)
-
Qinling Group (1)
-
-
Sinian (1)
-
-
-
-
sea water (1)
-
sea-floor spreading (1)
-
sedimentary rocks
-
chemically precipitated rocks
-
evaporites
-
salt (1)
-
-
-
clastic rocks
-
arkose (1)
-
bentonite (1)
-
conglomerate (1)
-
graywacke (1)
-
sandstone (1)
-
-
-
sedimentation (1)
-
sediments
-
clastic sediments
-
colluvium (1)
-
-
-
shorelines (1)
-
soils (1)
-
South America
-
Andes
-
Central Andes (1)
-
Western Cordillera (1)
-
-
Argentina (1)
-
Brazil
-
Rio Grande do Sul Brazil (1)
-
-
Peru
-
Puno Peru (1)
-
-
-
structural analysis (1)
-
sulfur
-
S-34/S-32 (2)
-
-
tectonics
-
neotectonics (1)
-
-
tellurium (1)
-
United States
-
Arizona
-
Yavapai County Arizona (2)
-
-
California
-
Central California (1)
-
Fresno County California (3)
-
Mono County California (1)
-
Nevada County California (1)
-
Northern California (1)
-
Plumas County California (1)
-
Sierra County California (1)
-
Sierra Nevada Batholith (1)
-
-
Colorado
-
Chaffee County Colorado (1)
-
Colorado mineral belt (1)
-
Gunnison County Colorado (1)
-
Lake County Colorado (1)
-
Mineral County Colorado (1)
-
Pitkin County Colorado (1)
-
San Juan volcanic field (2)
-
Sawatch Range (1)
-
Teller County Colorado
-
Cripple Creek Colorado (1)
-
-
-
Great Basin (1)
-
Idaho (1)
-
Lake Tahoe (1)
-
Nevada
-
Esmeralda County Nevada (1)
-
Nevada Test Site (1)
-
Nye County Nevada
-
Yucca Mountain (1)
-
-
White Pine County Nevada (1)
-
-
New Mexico
-
Dona Ana County New Mexico (1)
-
-
New York
-
Tompkins County New York
-
Ithaca New York (1)
-
-
-
Oregon
-
Harney County Oregon
-
Steens Mountain (1)
-
-
-
Texas
-
El Paso County Texas
-
El Paso Texas (1)
-
-
Hudspeth County Texas (1)
-
-
Trans-Pecos (1)
-
U. S. Rocky Mountains
-
Absaroka Range (2)
-
San Juan Mountains (2)
-
Sawatch Range (1)
-
-
Utah
-
Piute County Utah
-
Marysvale Utah (1)
-
-
-
Washington (1)
-
Wyoming (3)
-
-
volcanology (7)
-
waste disposal (1)
-
weathering (1)
-
well-logging (1)
-
-
sedimentary rocks
-
sedimentary rocks
-
chemically precipitated rocks
-
evaporites
-
salt (1)
-
-
-
clastic rocks
-
arkose (1)
-
bentonite (1)
-
conglomerate (1)
-
graywacke (1)
-
sandstone (1)
-
-
-
volcaniclastics (4)
-
-
sediments
-
grus (1)
-
sediments
-
clastic sediments
-
colluvium (1)
-
-
-
volcaniclastics (4)
-
-
soils
-
paleosols (1)
-
soils (1)
-
GeoRef Categories
Era and Period
Epoch and Age
Book Series
Date
Availability
trachyandesites
Early Miocene to Pliocene magmatic and structural evolution of the Gulf of California margin in central Baja California (Mexico): The Mulegé–La Trinidad region, Baja California Sur Available to Purchase
ABSTRACT The volcanic stratigraphy of the central Gulf of California margin of the Baja California peninsula preserves a valuable record of the transition from subduction of the Farallon plate (24–12 Ma) to oblique rifting (<12 Ma). Although strike-slip faults (as well as normal faults) are common in oblique rifts and are abundant on the new (younger than 6 Ma) seafloor in the Gulf of California, none has been previously reported in the onshore central Baja California margin. This study focused on a previously unmapped region in the central Baja California margin near Mulegé, where we identified a strike-slip fault, termed the Potrero fault, and described the regional magmatic and structural context for this fault. We did this by using geologic mapping of volcanic-volcaniclastic lithofacies, supported by petrography, geochemistry, and 40Ar/39Ar geochronology. The Potrero fault is a vertical fault that strikes N10°W, with dextral-oblique (down-to-the-east) slip. This fault juxtaposes older rocks on the west with younger rocks on the east. The older rocks on the west side of the Potrero fault are assigned to the Middle Comondú Group, which is early Miocene in age. They consist largely of a >800 m red bed sequence of coarse-grained andesitic volcanic debris-flow deposits (proximal facies) that transition westward into fluvial conglomerates and sandstones (distal facies). The proximal facies has interstratified coarse-grained trachyandesite block-and-ash-flow tuffs with a 40Ar/39Ar age of 18.72 ± 0.24 Ma. This section is cut by mafic- to intermediate-composition dikes, with lesser plugs, that have 40Ar/39Ar ages of 16.88 ± 0.30 Ma to 14.85 ± 0.05 Ma. This early Miocene assemblage is truncated by an angular unconformity and overlain by Pliocene high-Sr/Y trachyandesite lavas, with an 40Ar/39Ar age of 4.02 ± 0.04 Ma. The younger rocks on the east side of the Potrero fault are assigned to the Upper Comondú Group, which is middle to late Miocene in age. This unit is dominated by small lava shields, with diameters of 2–9 km and thicknesses up to 300 m. The lava shields have basaltic andesite, basaltic trachyandesite, andesite, high-Sr/Y trachyandesite, and dacite compositions, with 40Ar/39Ar ages of 13.39 ± 0.03 Ma to 10.74 ± 0.08 Ma (four samples). At two localities in the map area, the Upper Comondú Group lava shields rest in angular unconformity on the Middle Comondú Group red beds and dikes, and the eruptive equivalents of the dikes are missing along this unconformity. We correlated this unconformity with the unconformity at the top of the Middle Comondú Group on the west side of the Potrero fault to estimate a vertical component of slip of at least 800 m down-to-the-east across the Potrero fault. The lateral component of slip is not known, because the regions to the north and south are unmapped, so piercing points cannot be identified. The Middle Comondú Group in the Mulegé–La Trinidad area forms part of a regionally extensive, early Miocene lithostratigraphic unit, hundreds of meters thick, that outcrops for a distance of 500 km along the central to southern Gulf of California margin. It thickens and coarsens eastward, through what is now the Concepción Peninsula, where it also contains early Miocene dikes and hypabyssal intrusions and is similarly capped by an angular unconformity, with eruptive equivalents of the dikes and intrusions missing along the unconformity. We propose that the laterally extensive Middle Comondú Group was deposited in a rift basin, bounded by a west-dipping normal fault system that lay to the east of what is now the Concepción Peninsula, in the present-day offshore Gulf of California. We infer that the thick, coarse-grained volcanic andesitic debris-flow deposits of the Middle Comondú Group were shed from large andesite arc stratovolcanoes (Comondú arc) that also lay to the east in the present-day Gulf of California. We interpret the volumetrically minor block-and-ash-flow tuffs, dikes, and hypabyssal intrusions of the Middle Comondú Group to record minor magmatism in a forearc position. We also suggest that the angular unconformity at the top of the Middle Comondú Group records thermal uplift that occurred as the arc axis swept westward (trenchward) into the region, at ca. 14 Ma, due to continued slab rollback that began in the Oligocene under western Mexico. The Upper Comondú Group lavas in the Mulegé–La Trinidad area form part of a Middle to Upper Miocene lithostratigraphic unit, hundreds of meters thick, which outcrops for a distance of 700 km along the central to southern Gulf of California margin. This unit consists largely of andesite and basaltic andesite lavas erupted from stratovolcanoes in the axis of the Comondú arc. The Upper Comondú Group lavas thicken dramatically eastward toward the Bahía Concepción fault, a down-to-the-west normal fault that bounds the Concepción Peninsula on its west side. We thus infer that this fault became active in middle Miocene time (14 Ma). This fault records westward encroachment of normal faulting concurrent with the westward sweep of the arc axis, from the Gulf of California into Baja California. The Pliocene high-Sr/Y basaltic trachyandesite lavas that form the structurally highest part of the Mulegé–La Trinidad area form an erosional escarpment that does not extend to the Potrero fault, so the lavas cannot be used to determine whether the Potrero fault was active before, during, or after their eruption. The Pliocene high-Sr/Y basaltic trachyandesite lavas are a previously unidentified part of the regional postsubduction suite of “bajaites,” attributed to slab window magmatism.
Screening Apatite for Potential Use as a U-Pb Geochronometer in Zircon-Poor Magmatic Rocks: Age of Late-Stage Alkaline Magmatism in the Bolnisi District, Georgia Available to Purchase
Mantle melting in regions of thick continental lithosphere: Examples from Late Cretaceous and younger volcanic rocks, Southern Rocky Mountains, Colorado (USA) Open Access
The Early Cenozoic Volcanism of the Northern Okhotsk Region System of Grabens and Faults Available to Purchase
Late Mesozoic subduction-accretion in the southern Qiangtang: Insights from the Sumxi igneous complex of west-central Tibet Available to Purchase
Petrogenesis and tectonic implications of the Early Carboniferous shoshonitic to calc-alkaline magmatic rocks of the southern Yili terrane, western Tianshan Available to Purchase
Trace element partitioning between anhydrite, sulfate melt, and silicate melt Available to Purchase
Petrogenesis of the Limerick Igneous Suite: insights into the causes of post-eruptive alteration and the magmatic sources underlying the Iapetus Suture in SW Ireland Open Access
Intraplate Volcanism of the Alba Guyot: Geodynamic Formation Models of the Magellan Seamounts in the Pacific Ocean for 100 million years Available to Purchase
Early Au-rich sulfide liquid saturation explains the low Au endowment of continental intraplate alkaline magmas Available to Purchase
Reworking of Yangtze crust into the mantle lithosphere of the North China Craton along the Dabie–East Qinling Orogen: Evidence from the Early Cretaceous volcanic rocks Available to Purchase
Cenozoic delamination of the southwestern Yangtze craton owing to densification during subduction and collision Available to Purchase
Non-terrestrial Melts, Magmas and Glasses Available to Purchase
Late Mesozoic volcanism in the southern Xiong'er Mountains, eastern Qinling: Partial melting of the subducted Qinling crust underneath North China Available to Purchase
Trachyandesite of Kennedy Table, its vent complex, and post–9.3 Ma uplift of the central Sierra Nevada: Comment Open Access
Trachyandesite of Kennedy Table, its vent complex, and post–9.3 Ma uplift of the central Sierra Nevada: Reply Available to Purchase
Fault Activation in Central Mongolia during the Holocene: Results of Study of the Mogod Earthquake Ruptures Available to Purchase
Volcanic processes and magmatic evolution of Tianchi volcano, Changbaishan Available to Purchase
Abstract The Changbaishan volcanic field located on the Gaima (Gaema, Gaiman) Plateau has witnessed plateau-forming eruptions along with the uplift of the Gaima Plateau. The Tianchi basaltic lava shield volcano was formed at the main peak of Changbaishan, with cone construction eruptions that formed a huge and steep trachytic composite cone on the gentle lava shield. At the peak of the Millennium Eruption (ME), the height of the eruption column reached 25 km and the bulk volume of tephra was about 120 km 3 . The ME eventually formed Tianchi caldera, after which several eruptions occurred, albeit of a much smaller scale. The magmas involved in the shield-forming eruptions are characterized by both alkalic series trachybasalt and basaltic trachyandesite and subalkalic tholeiite and basaltic andesite. In the cone-construction and ignimbrite-forming eruption stages, the magma is completely composed of alkalic series trachyte and comendite. The largest negative Eu anomalies observed in ME magmas indicate that plagioclase was strongly crystallized and differentiated.