Results 71 to 80 of about 18,181 (272)

Petrogenesis of metabasalt rocks in the Bulfat complex, Kurdistan region, Iraqi Zagros Suture Zone [PDF]

Kirkuk Journal of Science, 2015
Metabasaltes are exposed in the Bulfat complex north of Qaladeza that is a part of the Northwestern Zagros Suture Zone (NZSZ).Petrographic and geochemical study of metabasaltes have been conducted in order to provide insights into the origin and ...
Sarmad A. Ali
doaj   +1 more source

MINERALOGICAL AND TEXTURAL EVOLUTION OF THE ECONOMIC MANGANESE MINERALIZATION IN WESTERN RHODOPE MASSIF, N GREECE [PDF]

, 1991
The western Rhodope massif contains a significant number of 'battery grade' Mn-oxide deposits which are best developed in the area near Kato Nevrokopi, Drama district, N. Greece.
Nimfopoulos, M K, Pattrick, R A D
core   +1 more source

Seismological Evidence of Multiple Crustal Magma Reservoirs Beneath Mt. Wrangell in Southcentral Alaska

Geophysical Research Letters, Volume 53, Issue 2, 28 January 2026.
Abstract Recent studies have challenged the classical view of magma chambers as ephemeral, melt‐rich bodies confined to shallow depths beneath arc volcanoes at subduction zones. Instead, increasing evidence supports the existence of long‐lived, vertically extensive magmatic systems with persistent partial melts within the crust. Nevertheless, the depth
Qili Andy Dai, Haiying Gao, Sahria Nayon, Zane Michael Cleghorn, Cong Li   +4 more
wiley   +1 more source

Mafic macrocrysts of ultrabasic alkaline dikes from the Mantiqueira Range, SE, Brazil: tracers of a complex plumbing system

Brazilian Journal of Geology, 2020
Macrocryst assemblages of porphyritic alkaline dikes in the Mantiqueira range (SE Brazil) are mainly composed of clinopyroxene and olivine with different origins.
Júlio César Lopes da Silva, Rogério Guitarrari Azzone, Luanna Chmyz, Vincenza Guarino, Nicholas Machado Lima   +4 more
doaj   +1 more source

Sea-floor tectonics and submarine hydrothermal systems [PDF]

, 2005
The discovery of metal-depositing hot springs on the sea floor, and especially their link to chemosynthetic life, was among the most compelling and significant scientific advances of the twentieth century. More than 300 sites of hydrothermal activity and
de Ronde, Cornell D. J., Hannington, Mark D., Petersen, Sven   +2 more
core   +1 more source

Magmatic and Tectonic Structures in the Crust Beneath Armenia and Surrounding Regions of Lesser Caucasus Inferred From Body‐Wave Earthquake Tomography

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 1, January 2026.
Abstract The Armenian Highlands, a tectonically active segment of the Arabia‐Eurasia collision zone, exhibit widespread Quaternary volcanism, rapid uplift, and intense seismicity. However, the lithospheric processes driving these phenomena remain poorly understood.
Ivan Koulakov, Lilit Sargsyan, Ara Levonyan, Elya Sahakyan, Mikayel Gevorgyan, Khachatur Meliksetian   +5 more
wiley   +1 more source

Plume-related granite-rhyolite magmatism

Литосфера, 2020
Plume-related magmatism is widespread and its existence is well-founded. Mostly, plume-related magmatism is represented by trap rocks, oceanic island basalts (OIB) and oceanic plateau basalts (OPB), although the composition of plume-related igneous ...
V. N. Puchkov
doaj  

The Early Triassic magmatism of the Alto ParaguayProvince, Central South America: Paleomagneticand ASM data

Open Geosciences, 2015
A paleomagnetic studystudywork was carriedout on the Alto Paraguay Province (APP), a belt of alkalinecomplexes that parallel the Paraguay river for morethan 40 km at the border of Brazil and Paraguay.
Ernesto Marcia, Comin-Chiaramonti Piero, Gomes Celso de Barros   +2 more
doaj   +1 more source

Magmatismo alcalino potássico saturado em SiO 2 na porção central do Cráton Amazônico, extremo sul do Domínio Uatumã-Anauá, NE do Amazonas, Brasil [PDF]

, 2017
Este trabalho analisa o registro do magmatismo alcalino potássico saturado-SiO 2 do Quartzo-Monzonito Castanhal e do Quartzo-Sienito Ladeira da Vovó. Essas rochas estão localizadas próximas à borda norte da Bacia do Amazonas.
Dantas, Elton Luiz, Macambira, Moacir José Buenano, Souza, Valmir da Silva, Valério, Cristóvão da Silva   +3 more
core   +1 more source

New Thermodynamic Models for Anhydrous Alkaline-Silicate Magmatic Systems

Journal of Petrology
Abstract A new thermodynamic model for silicate melt in the Na2O–CaO–K2O–FeO–MgO–Al2O3–SiO2–TiO2–Fe2O3–Cr2O3 model system is presented, building on the tholeiitic through to granitic melt model of Holland et al. (2018) [Journal of Petrology, 59, 881–900] but extending for the first time into anhydrous alkaline systems. The new melt model
Owen M Weller, Tim J B Holland, Caroline R Soderman, Eleanor C R Green, Roger Powell, Charles D Beard, Nicolas Riel   +6 more
openaire   +2 more sources