Results 21 to 30 of about 63,412 (230)

Tectonomagmatic setting of the Siahbaz A-type granitoids and mafic intrusions (Northwest of Khoy [PDF]

open access: yesپترولوژی, 2017
The Siahbaz granite-gabbro-appinite outcrops from the Northwest Khoy is related to one of the complex of the Late Ordovician-Early Permian. The complex is located on the north Sanandaj-Sirjan Zone.
Abdolnaser Fazlnia
doaj   +1 more source

Volcanic Lateral Collapse Processes in Mafic Arc Edifices: A Review of Their Driving Processes, Types and Consequences

open access: yesFrontiers in Earth Science, 2021
Volcanic cones are frequently near their gravitational stability limit, which can lead to lateral collapse of the edifice, causing extensive environmental impact, property damage, and loss of life.
Jorge E. Romero   +10 more
doaj   +1 more source

Baddeleyite and zircon U-Pb ages of the ultramafic rocks in Chigu Tso area, Southeastern Tibet and their constraints on the timing of Comei Large Igneous Province

open access: yesChina Geology, 2020
: A suite of ultramafic and mafic rocks developed in the Chigu Tso area, eastern Tethyan Himalaya. Baddeleyite and zircon U-Pb ages acquired by SIMS and LA-ICP-MS from olivine pyroxenite rocks in the Chigu Tso area are 138.9±3.0 Ma and 139.0±1.9 Ma ...
Ya-ying Wang   +10 more
doaj   +1 more source

Geology of Tindfjallajökull volcano, Iceland [PDF]

open access: yes, 2018
The geology of Tindfjallajökull volcano, southern Iceland, is presented as a 1:50,000 scale map. Field mapping was carried out with a focus on indicators of past environments.
Dave McGarvie   +10 more
core   +3 more sources

Continental extension of northern Gondwana margin in the Eastern Himalaya: Constraints from geochemistry and U–Pb zircon ages of mafic intrusives in the Siang window, Arunachal Himalaya, India

open access: yesComptes Rendus. Géoscience, 2020
We report new U–Pb zircon age and whole-rock geochemical data from the Pangin mafic intrusive rocks of the Siang window, eastern Himalayas. These mafic rocks are medium to coarse-grained gabbros, consisting mainly of plagioclase and clinopyroxene with ...
Oinam, Govind   +6 more
doaj   +1 more source

Rapakivi texture in porphyritic dikes within the Karavanke granitic massif (Slovenia) [PDF]

open access: yesBulletin of the Geological Society of Finland, 2002
The northern Karavanke Granitic Massif straddles the Slovenian–Austrian border. The investigated area lies in northern Slovenia, and extends from the western Slovenian–Austrian border to the east for about 30 km, with a maximum width of 2 km.
M. Dobnikar, T. Dolenec, G. Bellieni
doaj   +1 more source

Mapping undercover: integrated geoscientific interpretation and 3D modelling of a Proterozoic basin [PDF]

open access: yesSolid Earth, 2020
Gravity and 3D modelling combined with geochemical analysis examine the subsurface within and below the poorly exposed Palaeoproterozoic Yerrida Basin in central Western Australia.
M. D. Lindsay   +6 more
doaj   +1 more source

Evidence for magma mixing/mingling process in the plutonic intrusive bodies of Qorveh (Kurdistan Province): with emphasis on textural and geochemical characteristics [PDF]

open access: yesپترولوژی, 2023
The Qorveh batholith, in the N-Sanandaj-Sirjan Zone, comprises several gabbroic, dioritic and granitic masses intruded the Jurassic metamorphic assemblage (i.e., schist, amphibolite and marble). In spite of a number of studies which have been carried out
Seyedeh Azam Mousavi, Ashraf Torkian
doaj   +1 more source

Carbon Speciation and Solubility in Silicate Melts

open access: yesGeophysical Monograph Series, Page 179-194., 2020

This book is Open Access. A digital copy can be downloaded for free from Wiley Online Library.

Explores the behavior of carbon in minerals, melts, and fluids under extreme conditions

Carbon trapped in diamonds and carbonate-bearing rocks in subduction zones are examples of the continuing exchange of substantial carbon ...
Natalia Solomatova   +2 more
wiley  

+3 more sources

The lithospheric mantle and lower crust-mantle relationships under Scotland: a xenolithic perspective [PDF]

open access: yes, 2011
In the British Isles the majority of volcanic rocks containing upper mantle and lower crustal xenoliths occur in Scotland. Most of the occurrences are of Carboniferous–Permian age.
Arai   +17 more
core   +1 more source

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