Results 41 to 50 of about 3,014 (216)

The Temperature and Composition of the Mantle Sources of Martian Basalts

Geophysical Research Letters, 2023
The composition of basaltic melts in equilibrium with the mantle can be determined for several Martian meteorites and in‐situ rover analyses. We use the melting model MAGMARS to reproduce these primary melts and estimate the bulk composition and ...
Max Collinet, Ana‐Catalina Plesa, Thomas Ruedas, Sabrina Schwinger, Doris Breuer   +4 more
doaj   +1 more source

Petroleum geology: science and practice in the 21st century. New ideas and paradigms

Известия Томского политехнического университета: Инжиниринг георесурсов, 2017
The current importance of the paper is determined by the vital necessity that research and practical efforts should be now focused on studying and controlling the oilfield «life», based on conceptually new ideas and methods in petroleum geology.
Nikolay Petrovich Zapivalov
doaj   +2 more sources

KARAKTERISTIK PETROLOGI KOMPLEKS INTRUSI KECAMATAN CIKALONGKULON KABUPATEN CIANJUR JAWA BARAT

JGE
Penelitian tentang karakteristik batuan beku dapat berkontribusi pada penelitian lanjut tentang potensi sumber daya lainnya yang terkait dengan fenomena magmatisme, khususnya di lokasi yang memiliki sejarah magmatisme cukup panjang seperti di bagian ...
Fahmi Firmansyah, Rio Priandri Nugroho
doaj   +1 more source

Phlogopite-Olivine Nephelinites Erupted During Early Stage Rifting, North Tanzanian Divergence

Frontiers in Earth Science, 2020
The North Tanzanian Divergence (NTD, eastern branch of the East African Rift) corresponds to an early stage of continental breakup. In the southern NTD, two quaternary volcanoes of the Manyara-Balangida rift (Labait, Kwaraha) have erupted primary ...
Céline Baudouin, Fleurice Parat
doaj   +1 more source

CO2‐Rich Rejuvenated Stage Lavas on Hawaiian Islands

Geochemistry, Geophysics, Geosystems, 2022
Sedimentary carbonates are sent to the deep mantle if they are not completely destroyed at subduction zones, and subducted carbonates may contribute to plume volcanism.
Guoliang Zhang, Shuai Wang, Shichun Huang, Mingjun Zhan, Junhua Yao   +4 more
doaj   +1 more source

Petrogenetic evidences in geodynamics and placement of Nordoz intrusive masses in Alborz-Azerbaijan structural zone

Journal of Economic Geology
The Oligocene Nordoz intrusive complex is located in the eastern region of Siehroud, within the East Azerbaijan province, and within the Alborz-Azerbaijan structural zone.
Shahryar Mahmoudi , Shiva Lavi, Shohreh Hassanpour, Amir Ali Tabakh Shabani , Mehran Yegane Far   +4 more
doaj   +1 more source

Thallium Isotopes Reveal Brine Activity During Carbonatite Magmatism

Geochemistry, Geophysics, Geosystems, 2021
Carbonatite volcanism remains poorly understood compared to silicic volcanism due to the scarcity of carbonatite volcanoes worldwide and because volcanic H2O and CO2—major components in carbonatite volcanic systems—are not well preserved in the rock ...
Forrest Horton, Sune Nielsen, Yunchao Shu, Alan Gagnon, Jerzy Blusztajn   +4 more
doaj   +1 more source

Metasomatized Lithosphere and the Origin of Alkaline Lavas

Science, 2008
Recycled oceanic crust, with or without sediment, is often invoked as a source component of continental and oceanic alkaline magmas to account for their trace-element and isotopic characteristics. Alternatively, these features have been attributed to sources containing veined, metasomatized lithosphere.
Pilet, Sébastien, Baker, Michael B., Stolper, Edward M.   +2 more
openaire   +4 more sources

AFRP20: New P‐Wavespeed Model for the African Mantle Reveals Two Whole‐Mantle Plumes Below East Africa and Neoproterozoic Modification of the Tanzania Craton

Geochemistry, Geophysics, Geosystems, 2021
Africa's Cenozoic tectonism is often attributed to mantle plumes, particularly below East Africa, but their morphology, number, location, and impact on the African lithosphere are debated.
A. Boyce, I. D. Bastow, S. Cottaar, R. Kounoudis, J. Guilloud De Courbeville, E. Caunt, S. Desai   +6 more
doaj   +1 more source

A Mechanistic Look at the Amphibolitization of Mafic Crust: Insights From the Kråkeneset Gabbro Body, Western Gneiss Region, Norway

Journal of Metamorphic Geology, Volume 43, Issue 4, Page 385-405, May 2025.
ABSTRACT Fluid–rock interactions play a key role in the formation, evolution and recycling of the Earth's crust. For fluids to infiltrate rocks and enable and sustain fluid‐mediated mineral transformations, fluid pathways are required. In this study, we examined the potential mechanisms of formation of such pathways via detailed mineralogical ...
Saskia Grund, Timm John, Johannes C. Vrijmoed, Håkon Austrheim, Torgeir B. Andersen   +4 more
wiley   +1 more source