Results 11 to 20 of about 232 (180)
The Osmium Isotope Signature of Phanerozoic Large Igneous Provinces
Geophysical Monograph Series, Page 229-246., 2021 Exploring the links between Large Igneous Provinces and dramatic environmental impact
An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Alexander J. Dickson +2 more
wiley +5 more sources
Iraqi Geological Journal, 2023 Sidi Bou Othmane region in the Central Jebilet is formed by a Devonian schistose series. The polyphase Hercynian deformation in this area is characterised by penetrative, subvertical, synmetamorphic schistosity (S1), accompanied by folding ...
Amina Wafik +6 more
doaj +1 more source
Petrogenesis and Tectonic Implication of Jurassic Granites in Central Guangdong, SE China: Constraints from Zircon U-Pb-Hf-O and Whole-Rock Geochemical and Sr-Nd Isotopic Data [PDF]
LithosphereThe origin and tectonic regime responsible for the inland Jurassic granites in Southeast (SE) China remain controversial. This study presents zircon secondary ion mass spectrometry (SIMS) U-Pb ages, in situ zircon Hf-O isotopes, and whole-rock ...
Zhiguang Lai +3 more
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Lithosphere, 2022 The Bundelkhand craton in central India consists mainly of abundant high-K granitoids formed at the Archaean-Proterozoic boundary and several enclosed rafts of TTGs (tonalite-trondhjemite-granodiorites) up to 3.5 Ga.
Kumar Batuk Joshi +4 more
doaj +1 more source
International Journal of Geoheritage and Parks, 2019 The Pilbara region of Western Australia, covering some 500 km × 500 km, provides a diversity of Archaean to Proterozoic igneous rocks in a relatively compact area that records a younging southward crustal history of igneous activity, sedimentation, early
V. Semeniuk, M. Brocx
doaj +1 more source
Geosciences, 2018 The Archaean (4.0–2.5 Ga) continental crust is mainly composed of granitoids, whose geochemical characteristics are a function of their formation mechanisms and components, as well as physical conditions of their source.
Jaana Halla
doaj +1 more source
Open Geosciences, 2022 The Ad Damm shear zone (ADSZ) is a major mylonitic right-lateral structure that bounds the Jeddah terrane to the north from the Asir terrane to the south.
Samkari Abdulaziz +2 more
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Вестник Камчатской региональной ассоциации "Учебно-научный центр". Серия: Науки о Земле, 2019 The paper describes the obtained data on content, the nature of distribution and composition of heavy detrital minerals from Cenozoic sandstones rocks in the West Sakhalin terrane.
Малиновский А.И.
doaj +1 more source
Neoproterozoic magmatic evolution of the southern Ouaddaï Massif (Chad)
BSGF - Earth Sciences Bulletin, 2020 This paper presents new petrological, geochemical, isotopic (Nd) and geochronological data on magmatic rocks from the poorly known southern Ouaddaï massif, located at the southern edge of the so-called Saharan metacraton. This area is made of greenschist
Djerossem Félix +5 more
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Boletín Geológico, 2022 This work presents a considerable volume of new and compiled data indicating that arc magmatism in the western paleomargin of Gondwana began in the Carboniferous and continued during the Permian and Early Triassic.
Gabriel Rodríguez García +4 more
doaj +1 more source