Results 11 to 20 of about 40,183 (305)

Geophysical imaging of ophiolite structure in the United Arab Emirates

open access: yesNature Communications, 2020
The Semail ophiolite provides evidence for geological processes that form oceanic crust, however, its deep structure remains debated. Here, the authors use geophysical imaging to determine that the ophiolite is bound by a thrust fault in the west, and a ...
M. Y. Ali   +5 more
doaj   +2 more sources

Ediacaran Obduction of a Fore-Arc Ophiolite in SW Iberia: A Turning Point in the Evolving Geodynamic Setting of Peri- Gondwana [PDF]

open access: yesTectonics, 2018
The Calzadilla Ophiolite is an ensemble of mafic and ultramafic rocks that represents the transition between lower crust and upper mantle of a Cadomian (peri-Gondwanan) fore arc.
Arenas, R.   +4 more
core   +4 more sources

Large Igneous Province Record Through Time and Implications for Secular Environmental Changes and Geological Time‐Scale Boundaries

open access: yesGeophysical Monograph Series, Page 1-26., 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.
Richard E. Ernst   +8 more
wiley  

+1 more source

Looking for natural hydrogen in Albania and Kosova

open access: yesFrontiers in Earth Science, 2023
A regional geochemistry field study was conducted in Albania and Kosova to spot natural H2 occurrences related to ophiolite massifs. A total of 21 sites, mainly consisting of natural springs, were studied, and nine were sampled for analyzing associated ...
Dan Lévy   +6 more
doaj   +1 more source

Mineral Chemistry–thermobarometry and Petrography of Metamorphic Sole Rocks of Kömürhan Ophiolite (SE Turkey): Constraints to Evolution and Emplacement

open access: yesHittite Journal of Science and Engineering, 2020
This paper presents the generation of metamorphic sole rocks through the detailed geochemical and petrographical analysis of field work carried out on the Kömürhan ophiolite.
Nusret Nurlu
doaj   +1 more source

PETROLOGY OF THE CRUSTAL PLUTONIC ROCKS OF NAWEOBA BLOCK, ZHOB OPHIOLITE, BALOCHISTAN, PAKISTAN [PDF]

open access: yesEarth Sciences Pakistan, 2021
Zhob Ophiolite complex is composed of three detached blocks named Omzha, Ali Khanzai and Naweoba blocks. The crustal plutonic section of the Naweoba block is mapped and divided into gabbro and granite. Based on petrographical studies, the gabbros fell in
Naseer Uddin   +5 more
doaj   +1 more source

Evolution history of north Anarak, Central Iran ophiolitic olistoliths using petrographical and mineral chemistry studies [PDF]

open access: yesپترولوژی, 2021
Anarak ophiolite, belonging to Paleozoic, formed along with the tectonic evolution of the Paleo- Tethys Ocean, consisting of meta- peridotites of mantle and crust, cumulate rocks, massive gabbros, pillow lava, basic and ultrabasic dikes, rodingite and ...
Elahe Zarei   +2 more
doaj   +1 more source

Forearc magmatic evolution during subduction initiation: Insights from an Early Cretaceous Tibetan ophiolite and comparison with the Izu-Bonin-Mariana forearc

open access: yesGSA Bulletin, 2020
Subduction initiation is a key process in the operation of plate tectonics. Our understanding of melting processes and magmatic evolution during subduction initiation has largely been developed from studies of the Izu-Bonin-Mariana forearc.
J. Dai, E. al.
semanticscholar   +1 more source

Mineralogical evolution of the northern Bossoroca ophiolite, São Gabriel terrane

open access: yesBrazilian Journal of Geology, 2020
Mineralogical evolution of ophiolites is significant to understand paleo-oceanic crust and mantle requiring multi-proxy techniques to identify steps in the processes. We studied the Bossoroca ophiolite from the southern Brasiliano Orogen, a prime example
Amanda Juliano Massuda   +5 more
doaj   +1 more source

Chemistry of accessory chromian spinel in serpentinites from the Penjwen ophiolite rocks, Zagros thrust zone, [PDF]

open access: yesKirkuk Journal of Science, 2009
Chromian spinel is a widespread accessory mineral in ultramafic rocks of the Penjwen ophiolite, occurring in two modes; fresh grains in dunite rocks that crop out in the eastern part and altered grains in serpentinized peridotites in the western part of ...
Sabah A.Ismail
doaj   +1 more source

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