Results 61 to 70 of about 32,561 (204)

U‐Pb Geochronology and Lu‐Hf Isotopic Characterization of the Canadian High Arctic Large Igneous Province (HALIP): Comparison to Oceanic Plateau Magmatism

open access: yesGeochemistry, Geophysics, Geosystems
Recent high‐precision geochronological studies have delineated three main pulses of basaltic magmatism between ca. 130‐80 Ma in the Cretaceous High Arctic Large Igneous Province (HALIP) in northern Canada.
D. M. Dockman   +5 more
doaj   +1 more source

Petrology and geochemical characteristics of dolomite in the Middle Permian Maoukou Formation, central Sichuan

open access: yesPetroleum Research, 2017
Dolomites of the Maokou Formation in the central Sichuan were mainly developed in the middle-upper part of Member 2 and the lower part of Member 3 of Maokou Formation, it could be divided into fine-to medium-grained calcareous dolomite, fine-to medium ...
Jianqiang Liu   +6 more
doaj   +1 more source

Tectonic history of the South Tannuol Fault Zone (Tuva region of the northern Central Asian Orogenic Belt, Russia) : constraints from multi-method geochronology [PDF]

open access: yes, 2020
In this study, we present zircon U/Pb, plagioclase and K-feldspar Ar-40/Ar-39 and apatite fission track (AFT) data along the South Tannuol Fault Zone (STFZ).
De Grave, Johan   +6 more
core   +1 more source

Geology of the Transverse Range Province, Southern California [PDF]

open access: yes, 1954
The Transverse Range province of southern California is an elongate geomorphic and structural unit that trends essentially east-west across parts of Santa Barbara, Ventura, Los Angeles, San Bernardino, and Riverside Counties (pl. 4).
Bailey, Thomas L., Jahns, Richard H.
core  

Frontiers in large igneous province research

open access: yesLithos, 2005
Abstract Earth history is punctuated by events during which large volumes of mafic magmas were generated and emplaced by processes distinct from “normal” seafloor spreading and subduction-related magmatism. Large Igneous Provinces (LIPs) of Mesozoic and Cenozoic age are the best preserved, and comprise continental flood basalts, volcanic rifted ...
Ernst, Richard   +2 more
openaire   +2 more sources

Assessment of Hg Speciation Changes in the Sedimentary Rock Record From Thermal Desorption Characteristics

open access: yesGeochemistry, Geophysics, Geosystems
Sedimentary mercury (Hg) has become a widely used proxy for paleo‐volcanic activity. However, scavenging and drawdown of Hg by organic‐matter (OM) and sulfides are important non‐volcanic factors determining variability in such records.
J. Frieling   +3 more
doaj   +1 more source

Regional Geophysics of the Caribbean and Northern South America: Implications for Tectonics

open access: yesGeochemistry, Geophysics, Geosystems, 2022
The Caribbean plate is an enclosed oceanic basin whose formation and evolution are controversial. In the most commonly accepted model, the Caribbean plate is mainly composed of the Caribbean Large Igneous Province (CLIP) and the buoyant characteristic of
Carol V. Barrera‐Lopez   +2 more
doaj   +1 more source

The signature of river- and wind-borne materials exported from Patagonia to the southern latitudes: a view from REEs and implications for paleoclimatic interpretations [PDF]

open access: yes, 2004
Riverine and wind-borne materials transferred from Patagonia to the SW Atlantic exhibit a homogeneous rare earth element (REE) signature. They match well with the REE composition of Recent tephra from the Hudson volcano,and hence this implies a ...
Bidart, Susana M.   +4 more
core   +2 more sources

Translithospheric magma plumbing system fossilized in the Emeishan large igneous province

open access: yesCommunications Earth & Environment
Lighting up the magma plumbing system beneath a large igneous province (LIP) is challenging because the complex magma migration paths are often covered by flood basalts and sediments.
Sixue Wang   +9 more
doaj   +1 more source

Ultramafic xenoliths from the Bearpaw Mountains, Montana, USA: evidence for multiple metasomatic events in the lithospheric mantle beneath the Wyoming craton [PDF]

open access: yes, 2004
Ultramafic xenoliths in Eocene minettes of the Bearpaw Mountains volcanic field (Montana, USA), derived from the lower lithosphere of the Wyoming craton, can be divided based on textural criteria into tectonite and cumulate groups. The tectonites consist
Abidin, M.S.Z.   +11 more
core   +2 more sources

Home - About - Disclaimer - Privacy