- 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
-
Antarctica
-
Transantarctic Mountains (1)
-
-
Sierra Nevada (1)
-
South America
-
Andes (1)
-
Argentina
-
La Rioja Argentina (1)
-
Mendoza Argentina (1)
-
Pampean Mountains (6)
-
San Juan Argentina
-
Talacasto Argentina (1)
-
-
-
Patagonia (1)
-
Precordillera (2)
-
-
United States
-
California
-
Central California (1)
-
-
-
-
elements, isotopes
-
isotope ratios (3)
-
isotopes
-
radioactive isotopes
-
Rb-87/Sr-86 (1)
-
-
stable isotopes
-
Nd-144/Nd-143 (1)
-
O-18/O-16 (2)
-
Rb-87/Sr-86 (1)
-
Sr-87/Sr-86 (1)
-
-
-
metals
-
alkali metals
-
rubidium
-
Rb-87/Sr-86 (1)
-
-
-
alkaline earth metals
-
strontium
-
Rb-87/Sr-86 (1)
-
Sr-87/Sr-86 (1)
-
-
-
rare earths
-
neodymium
-
Nd-144/Nd-143 (1)
-
-
-
-
oxygen
-
O-18/O-16 (2)
-
-
-
geochronology methods
-
Nd/Nd (1)
-
Rb/Sr (1)
-
Sr/Sr (1)
-
U/Pb (5)
-
-
geologic age
-
Mesozoic
-
Cretaceous
-
Upper Cretaceous (1)
-
-
-
Paleozoic
-
Cambrian
-
Lower Cambrian (1)
-
-
Devonian (1)
-
Ordovician (4)
-
Permian
-
Upper Permian (1)
-
-
Silurian (1)
-
-
Precambrian
-
upper Precambrian
-
Proterozoic
-
Neoproterozoic (1)
-
-
-
-
-
igneous rocks
-
igneous rocks
-
plutonic rocks
-
anorthosite (1)
-
gabbros
-
norite (1)
-
-
granites
-
leucogranite (1)
-
-
granodiorites (1)
-
-
volcanic rocks
-
rhyolites (1)
-
-
-
-
metamorphic rocks
-
K-bentonite (1)
-
metamorphic rocks
-
amphibolites (1)
-
metaigneous rocks
-
metagabbro (1)
-
-
migmatites (2)
-
-
-
minerals
-
K-bentonite (1)
-
silicates
-
orthosilicates
-
nesosilicates
-
zircon group
-
zircon (3)
-
-
-
-
-
-
Primary terms
-
absolute age (5)
-
Antarctica
-
Transantarctic Mountains (1)
-
-
continental drift (2)
-
crust (2)
-
faults (1)
-
folds (1)
-
geochemistry (3)
-
igneous rocks
-
plutonic rocks
-
anorthosite (1)
-
gabbros
-
norite (1)
-
-
granites
-
leucogranite (1)
-
-
granodiorites (1)
-
-
volcanic rocks
-
rhyolites (1)
-
-
-
inclusions (1)
-
intrusions (2)
-
isotopes
-
radioactive isotopes
-
Rb-87/Sr-86 (1)
-
-
stable isotopes
-
Nd-144/Nd-143 (1)
-
O-18/O-16 (2)
-
Rb-87/Sr-86 (1)
-
Sr-87/Sr-86 (1)
-
-
-
magmas (2)
-
mantle (1)
-
Mesozoic
-
Cretaceous
-
Upper Cretaceous (1)
-
-
-
metals
-
alkali metals
-
rubidium
-
Rb-87/Sr-86 (1)
-
-
-
alkaline earth metals
-
strontium
-
Rb-87/Sr-86 (1)
-
Sr-87/Sr-86 (1)
-
-
-
rare earths
-
neodymium
-
Nd-144/Nd-143 (1)
-
-
-
-
metamorphic rocks
-
amphibolites (1)
-
metaigneous rocks
-
metagabbro (1)
-
-
migmatites (2)
-
-
metamorphism (2)
-
orogeny (3)
-
oxygen
-
O-18/O-16 (2)
-
-
paleogeography (3)
-
Paleozoic
-
Cambrian
-
Lower Cambrian (1)
-
-
Devonian (1)
-
Ordovician (4)
-
Permian
-
Upper Permian (1)
-
-
Silurian (1)
-
-
plate tectonics (4)
-
Precambrian
-
upper Precambrian
-
Proterozoic
-
Neoproterozoic (1)
-
-
-
-
sedimentary rocks (1)
-
South America
-
Andes (1)
-
Argentina
-
La Rioja Argentina (1)
-
Mendoza Argentina (1)
-
Pampean Mountains (6)
-
San Juan Argentina
-
Talacasto Argentina (1)
-
-
-
Patagonia (1)
-
Precordillera (2)
-
-
tectonics (1)
-
United States
-
California
-
Central California (1)
-
-
-
-
rock formations
-
Famatina System (2)
-
-
sedimentary rocks
-
sedimentary rocks (1)
-
O–H–Sr–Nd isotope constraints on the origin of the Famatinian magmatic arc, NW Argentina
Magmatically folded and faulted schlieren zones formed by magma avalanching in the Sonora Pass Intrusive Suite, Sierra Nevada, California
Mafic rocks of the Ordovician Famatinian magmatic arc (NW Argentina): New insights into the mantle contribution
The Gondwana connections of northern Patagonia
Grenvillian massif-type anothosites in the Sierras Pampeanas
Grenvillian massif-type anorthosites in the Sierras Pampeanas
K-bentonites in the Argentine Precordillera contemporaneous with rhyolite volcanism in the Famatinian Arc
Involvement of the Argentine Precordillera terrane in the Famatinian mobile belt: U-Pb SHRIMP and metamorphic evidence from the Sierra de Pie de Palo
Early evolution of the Proto-Andean margin of South America
Abstract The carbonate Vegadeo Fm (Lower-Middle Cambrian, NW Spain) hosts abundant Zn-Pb mineralization. Minor stratiform ore showings occur in mineralogically and geochemically undisturbed limestones of the Lower Member. They are interpreted as related to diagenetic processes, with sulfur derived from the abiogenic reduction of sulfates interbedded in the carbonates and lead leached from the nearby detrital rocks. The major mineralization, stratabound deposits in the Upper Vegadeo Fm and discordant replacements (Rubiales-type), occurs in relationship with pervasive epigenetic silicification and minor hydrothermal breccias. They are interpreted as of Late Variscan age. Here, the mineralization seems to be formed by reaction of the hosting carbonates with low-saline (<7 wt% NaCl eq.) water-rich fluids that circulated along major lithologic contacts or extensional faults. Isotopic composition of the hydrothermal fluids falls within the field of low-grade metamorphic or basinal waters (δ 18 0=-1.0 to +6.3%; δD=-43 to -31%0). The ore-forming process occurred at temperatures between 150 and 250°C and at low fluid pressures (<500 b). Lead isotopes suggest that most of the base metals were derived from the hydrothermal remobilization of the diagenetic ores in a “lead-frozen” system. Some of the sulfur appears to have had the same source, but there was also a significant input from biogenically-reduced sulfur from the enclosing shales. These Variscan ores have many of the descriptive features of carbonate-hosted deposits, but the fluid compositions, P-T conditions of formation, and tectonic setting were fundamentally different. They can be interpreted as equivalent to MVT deposits, but formed in the internal zones of orogenic belts.