- 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 (1)
-
Asia
-
Arabian Peninsula
-
Arabian Shield (2)
-
Saudi Arabia (2)
-
-
-
Cascade Range (1)
-
Cascadia subduction zone (1)
-
Coast Ranges (3)
-
Death Valley (1)
-
North America
-
Basin and Range Province
-
Great Basin (1)
-
-
-
Pacific Ocean
-
East Pacific
-
Northeast Pacific
-
Mendocino fracture zone (1)
-
-
-
North Pacific
-
Northeast Pacific
-
Mendocino fracture zone (1)
-
-
-
-
San Andreas Fault (1)
-
Sierra Nevada (1)
-
United States
-
Arizona
-
Santa Cruz County Arizona (1)
-
-
California
-
Lake County California (1)
-
Los Angeles County California
-
Los Angeles California
-
Northridge California (1)
-
-
-
Napa County California (1)
-
Northern California (1)
-
San Bernardino County California (1)
-
San Francisco Bay region (2)
-
Solano County California (1)
-
Southern California (1)
-
Yolo County California (1)
-
-
Coeur d'Alene mining district (1)
-
Colorado Plateau (1)
-
Great Basin (1)
-
Idaho
-
Cassia County Idaho (1)
-
Snake River plain (1)
-
-
Lewis and Clark Lineament (1)
-
Nevada
-
Esmeralda County Nevada
-
Goldfield Nevada (1)
-
-
Lander County Nevada (2)
-
Shoshone Mountains (1)
-
Toiyabe Range (1)
-
-
Oregon
-
Clackamas County Oregon (1)
-
Multnomah County Oregon
-
Portland Oregon (1)
-
-
-
Utah
-
Beaver County Utah (1)
-
Garfield County Utah (1)
-
Iron County Utah (1)
-
Kane County Utah (1)
-
Piute County Utah
-
Marysvale Utah (1)
-
-
Washington County Utah (1)
-
-
Washington
-
Clark County Washington
-
Vancouver Washington (1)
-
-
King County Washington (1)
-
-
-
-
commodities
-
metal ores
-
base metals (1)
-
copper ores (1)
-
gold ores (3)
-
lead ores (1)
-
lead-zinc deposits (1)
-
molybdenum ores (1)
-
silver ores (3)
-
zinc ores (1)
-
-
mineral deposits, genesis (4)
-
mineral exploration (2)
-
-
elements, isotopes
-
carbon
-
C-13/C-12 (2)
-
-
hydrogen
-
D/H (1)
-
-
isotope ratios (4)
-
isotopes
-
stable isotopes
-
C-13/C-12 (2)
-
D/H (1)
-
Nd-144/Nd-143 (1)
-
O-18/O-16 (2)
-
S-34/S-32 (1)
-
Sr-87/Sr-86 (3)
-
-
-
metals
-
alkaline earth metals
-
strontium
-
Sr-87/Sr-86 (3)
-
-
-
precious metals (1)
-
rare earths
-
neodymium
-
Nd-144/Nd-143 (1)
-
-
-
-
oxygen
-
O-18/O-16 (2)
-
-
sulfur
-
S-34/S-32 (1)
-
-
-
geochronology methods
-
Ar/Ar (16)
-
fission-track dating (1)
-
K/Ar (6)
-
paleomagnetism (4)
-
Rb/Sr (2)
-
Re/Os (1)
-
tephrochronology (5)
-
U/Pb (2)
-
-
geologic age
-
Cenozoic
-
Quaternary
-
Pleistocene (2)
-
-
Tertiary
-
middle Tertiary (1)
-
Neogene
-
Miocene
-
middle Miocene (1)
-
-
Pliocene
-
upper Pliocene (1)
-
-
upper Neogene (1)
-
-
Paleogene
-
Claron Formation (1)
-
Oligocene (3)
-
Paleocene (1)
-
-
-
-
Mesozoic
-
Cretaceous
-
Lower Cretaceous (1)
-
Upper Cretaceous (1)
-
-
-
Precambrian
-
upper Precambrian
-
Proterozoic
-
Mesoproterozoic
-
Belt Supergroup (1)
-
-
Neoproterozoic (1)
-
-
-
-
-
igneous rocks
-
igneous rocks
-
porphyry
-
vitrophyre (1)
-
-
volcanic rocks
-
andesites (3)
-
basalts (5)
-
glasses
-
volcanic glass (2)
-
-
pyroclastics
-
ash-flow tuff (3)
-
tuff (7)
-
-
rhyolites (2)
-
vitrophyre (1)
-
-
-
-
metamorphic rocks
-
metamorphic rocks (1)
-
-
minerals
-
minerals (1)
-
silicates
-
framework silicates
-
feldspar group
-
alkali feldspar
-
adularia (1)
-
-
plagioclase (1)
-
-
-
orthosilicates
-
nesosilicates
-
zircon group
-
zircon (3)
-
-
-
-
-
sulfates
-
alunite (2)
-
-
sulfides
-
molybdenite (1)
-
-
-
Primary terms
-
absolute age (22)
-
Africa (1)
-
Asia
-
Arabian Peninsula
-
Arabian Shield (2)
-
Saudi Arabia (2)
-
-
-
carbon
-
C-13/C-12 (2)
-
-
Cenozoic
-
Quaternary
-
Pleistocene (2)
-
-
Tertiary
-
middle Tertiary (1)
-
Neogene
-
Miocene
-
middle Miocene (1)
-
-
Pliocene
-
upper Pliocene (1)
-
-
upper Neogene (1)
-
-
Paleogene
-
Claron Formation (1)
-
Oligocene (3)
-
Paleocene (1)
-
-
-
-
diagenesis (1)
-
faults (9)
-
foliation (1)
-
geochemistry (5)
-
geochronology (4)
-
geophysical methods (1)
-
ground water (1)
-
hydrogen
-
D/H (1)
-
-
igneous rocks
-
porphyry
-
vitrophyre (1)
-
-
volcanic rocks
-
andesites (3)
-
basalts (5)
-
glasses
-
volcanic glass (2)
-
-
pyroclastics
-
ash-flow tuff (3)
-
tuff (7)
-
-
rhyolites (2)
-
vitrophyre (1)
-
-
-
inclusions
-
fluid inclusions (2)
-
-
intrusions (2)
-
isotopes
-
stable isotopes
-
C-13/C-12 (2)
-
D/H (1)
-
Nd-144/Nd-143 (1)
-
O-18/O-16 (2)
-
S-34/S-32 (1)
-
Sr-87/Sr-86 (3)
-
-
-
lava (4)
-
magmas (2)
-
Mesozoic
-
Cretaceous
-
Lower Cretaceous (1)
-
Upper Cretaceous (1)
-
-
-
metal ores
-
base metals (1)
-
copper ores (1)
-
gold ores (3)
-
lead ores (1)
-
lead-zinc deposits (1)
-
molybdenum ores (1)
-
silver ores (3)
-
zinc ores (1)
-
-
metals
-
alkaline earth metals
-
strontium
-
Sr-87/Sr-86 (3)
-
-
-
precious metals (1)
-
rare earths
-
neodymium
-
Nd-144/Nd-143 (1)
-
-
-
-
metamorphic rocks (1)
-
metasomatism (2)
-
mineral deposits, genesis (4)
-
mineral exploration (2)
-
minerals (1)
-
North America
-
Basin and Range Province
-
Great Basin (1)
-
-
-
orogeny (1)
-
oxygen
-
O-18/O-16 (2)
-
-
Pacific Ocean
-
East Pacific
-
Northeast Pacific
-
Mendocino fracture zone (1)
-
-
-
North Pacific
-
Northeast Pacific
-
Mendocino fracture zone (1)
-
-
-
-
paleoclimatology (1)
-
paleogeography (3)
-
paleomagnetism (4)
-
paragenesis (1)
-
plate tectonics (6)
-
Precambrian
-
upper Precambrian
-
Proterozoic
-
Mesoproterozoic
-
Belt Supergroup (1)
-
-
Neoproterozoic (1)
-
-
-
-
sedimentary rocks
-
clastic rocks (1)
-
-
sediments (1)
-
stratigraphy (4)
-
structural geology (1)
-
sulfur
-
S-34/S-32 (1)
-
-
tectonics (7)
-
tectonophysics (1)
-
United States
-
Arizona
-
Santa Cruz County Arizona (1)
-
-
California
-
Lake County California (1)
-
Los Angeles County California
-
Los Angeles California
-
Northridge California (1)
-
-
-
Napa County California (1)
-
Northern California (1)
-
San Bernardino County California (1)
-
San Francisco Bay region (2)
-
Solano County California (1)
-
Southern California (1)
-
Yolo County California (1)
-
-
Coeur d'Alene mining district (1)
-
Colorado Plateau (1)
-
Great Basin (1)
-
Idaho
-
Cassia County Idaho (1)
-
Snake River plain (1)
-
-
Lewis and Clark Lineament (1)
-
Nevada
-
Esmeralda County Nevada
-
Goldfield Nevada (1)
-
-
Lander County Nevada (2)
-
Shoshone Mountains (1)
-
Toiyabe Range (1)
-
-
Oregon
-
Clackamas County Oregon (1)
-
Multnomah County Oregon
-
Portland Oregon (1)
-
-
-
Utah
-
Beaver County Utah (1)
-
Garfield County Utah (1)
-
Iron County Utah (1)
-
Kane County Utah (1)
-
Piute County Utah
-
Marysvale Utah (1)
-
-
Washington County Utah (1)
-
-
Washington
-
Clark County Washington
-
Vancouver Washington (1)
-
-
King County Washington (1)
-
-
-
volcanology (1)
-
-
sedimentary rocks
-
sedimentary rocks
-
clastic rocks (1)
-
-
volcaniclastics (2)
-
-
sediments
-
sediments (1)
-
volcaniclastics (2)
-
Late Neogene–Quaternary tephrochronology, stratigraphy, and paleoclimate of Death Valley, California, USA
40 Ar/ 39 Ar geochronology, paleomagnetism, and evolution of the Boring volcanic field, Oregon and Washington, USA
Succession of Laramide Magmatic and Magmatic-Hydrothermal Events in the Patagonia Mountains, Santa Cruz County, Arizona
Evolution of the Rodgers Creek–Maacama right-lateral fault system and associated basins east of the northward-migrating Mendocino Triple Junction, northern California
Miocene magmatism in the Bodie Hills volcanic field, California and Nevada: A long-lived eruptive center in the southern segment of the ancestral Cascades arc
Age, composition, and areal distribution of the Pliocene Lawlor Tuff, and three younger Pliocene tuffs, California and Nevada
Geology and geochemistry of volcanic centers within the eastern half of the Sonoma volcanic field, northern San Francisco Bay region, California
Geology, geochronology, and paleogeography of the southern Sonoma volcanic field and adjacent areas, northern San Francisco Bay region, California
Oligocene and Miocene arc volcanism in northeastern California: Evidence for post-Eocene segmentation of the subducting Farallon plate
Abstract More than 80 small volcanoes are scattered throughout the Portland-Vancouver metropolitan area of northwestern Oregon and southwestern Washington. These volcanoes constitute the Boring Volcanic Field, which is centered in the Neogene Portland Basin and merges to the east with coeval volcanic centers of the High Cascade volcanic arc. Although the character of volcanic activity is typical of many monogenetic volcanic fields, its tectonic setting is not, being located in the forearc of the Cascadia subduction system well trenchward of the volcanic-arc axis. The history and petrology of this anomalous volcanic field have been elucidated by a comprehensive program of geologic mapping, geochemistry, 40 Ar/ 39 Ar geochronology, and paleomag-netic studies. Volcanism began at 2.6 Ma with eruption of low-K tholeiite and related lavas in the southern part of the Portland Basin. At 1.6 Ma, following a hiatus of ~0.8 m.y., similar lavas erupted a few kilometers to the north, after which volcanism became widely dispersed, compositionally variable, and more or less continuous, with an average recurrence interval of 15,000 yr. The youngest centers, 50-130 ka, are found in the northern part of the field. Boring centers are generally monogenetic and mafic but a few larger edifices, ranging from basalt to low-SiO 2 andesite, were also constructed. Low-K to high-K calc-alkaline compositions similar to those of the nearby volcanic arc dominate the field, but many centers erupted magmas that exhibit little influence of fluids derived from the subducting slab. The timing and compositional characteristics of Boring volcanism suggest a genetic relationship with late Neogene intra-arc rifting.
Large-magnitude Miocene extension of the Eocene Caetano caldera, Shoshone and Toiyabe Ranges, Nevada
Late Cenozoic paleogeographic evolution of northeastern Nevada: Evidence from the sedimentary basins
Crustal controls on magmatic-hydrothermal systems: A geophysical comparison of White River, Washington, with Goldfield, Nevada
Ad Duwayhi, Saudi Arabia: Geology and Geochronology of a Neoproterozoic Intrusion-Related Gold System in the Arabian Shield
Geologic Setting and Genesis of the Mule Canyon Low-Sulfidation Epithermal Gold-Silver Deposit, North-Central Nevada
Age and Origin of Base and Precious Metal Veins of the Coeur D’Alene Mining District, Idaho
Fallout tuffs of Trapper Creek, Idaho—A record of Miocene explosive volcanism in the Snake River Plain volcanic province
Isotopic complexities and the age of the Delfonte volcanic rocks, eastern Mescal Range, southeastern California: Stratigraphic and tectonic implications
Chapter 21: Neodymium, strontium, and trace-element evidence of crustal anatexis and magma mixing in the Idaho batholith
Variations in initial 143 Nd/ 144 Nd in Late Cretaceous plutonic rocks along the South Fork of the Clearwater River (SFCR) supplement results of Sr and O studies, which demonstrate large-scale mixing in magmas forming the western margin of the Idaho batholith. These marginal or border phases of the batholith span the terrane boundary between Proterozoic crust of North America and late Paleozoic-Mesozoic intraoceanic arc terranes (WSD terranes), delineated by the Western Idaho suture zone (or WISZ). ɛ Nd (t) values in Early Cretaceous and older, pre-accretionary plutons of the WSD range from +3 to +7.6, and average +5.7. Proterozoic orthogneisses and metasedimentary rocks range from -7.4 to -13.7 and -10.45 to -15.7, respectively. ɛ Nd (t) in Late Cretaceous plutons of the SFCR decreases abruptly from west to east near the WISZ, varying inversely with ɛSr (t) . Although Sr isotopic evidence (Fleck and Criss, 1985) is consistent with a binary mixing model, Sm-Nd results modify those conclusions, suggesting that SFCR plutons may be divided into three groups. Group 1 plutons occur in a narrow zone (<4 km width) along the suture zone (WISZ). These bodies probably represent at least three-component mixtures of very high-Sr, arc-type magmas, one or more Proterozoic crustal components that may include lower crust, and a high-Nb, high-Zr component. Group 2 plutons are characterized by high ɛSr (t) .and nearly constant, low ɛNd (t) . These bodies are thought to represent mixtures of deep-seated partial melts of two different Proterozoic lithospheric types, possibly representing upper and lower crust. Plutons belonging to Group 3 have ɛNd (t) .values <-14 and probably incorporated substantial amounts of Proterozoic metasedimentary rocks, but mixing components are poorly defined. Trace-element variations in SFCR rocks also reflect the arc terrane-continental crustal boundary as Nb, Zr, and Nd increase dramatically, whereas Sr, Rb/Nb, and Sm/Nd exhibit coincident decreases east of the WISZ. Modeling of these variations with the isotopic variations in Nd and Sr supports mixing, but precludes contamination-bulk-assimilation models. Correlated ɛNd, ɛSr, and δ 18 O within the SFCR favors mixing of crustal and subcrustal magmas rather than derivation of the melts entirely from subcontinental lithosphere.