Results 1 to 10 of about 549,859 (138)

Tracing crustal contamination of the Cenozoic basalts with OIB-affinity in northern marginal region of North China Craton: An Os perspective

open access: yesChina Geology, 2021
The Cenozoic basalts with OIB-affinity in northern marginal region of the North China Craton are thought to experience minor even no crustal contamination during the magma evolution.
Zhuang Li, Bin Chen
doaj   +1 more source

Analysis the 1978–2008 crustal and sub-crustal earthquake catalog of Vrancea region [PDF]

open access: yesNatural Hazards and Earth System Sciences, 2012
The crustal and sub-crustal seismicity that occurred in the Vrancea area from 1978 to 2008 is investigated. Due to quarry blast contamination, the analysis of the crustal seismicity was restricted to events that occurred between 20 km and 60 km ...
L. Telesca, V. Alcaz, I. Sandu
doaj   +1 more source

Systematic and Temporal Geochemical Changes in the Upper Deccan Lavas: Implications for the Magma Plumbing System of Flood Basalt Provinces

open access: yesGeochemistry, Geophysics, Geosystems, 2023
Large Igneous Provinces (LIPs) are unusual volcanic events in which massive amounts of melt (∼106 km3) erupt in relatively short time periods (
P. A. Hoyer   +3 more
doaj   +1 more source

The role of crustal contamination and differentiation in the formation of the Eocene volcanic rocks in Jirande area (Northwest of Qazvin) [PDF]

open access: yesپترولوژی, 2018
The Eocene volcanic rocks in Jirande area are dominated by basalt, andesite, trachyt and trachyandesite, which range from basic to intermediate rocks. Plagioclase as major mineral in igneous rocks makes up the largest percentage mineral in these rocks ...
Seyede Somayeh Teimouri   +2 more
doaj   +1 more source

Study of origin and petrogenesis of granitoid bodies of Soursat complex (Northwest of Takab): Whole- rock ‎geochemical and Sr-Nd isotopic evidences [PDF]

open access: yesپترولوژی, 2019
The plutonic bodies in the Soursat complex are parts of the widespread plutonic bodies in the Sanandaj- Sirjan zone. Based on field observations and microscopic studies, the study area is dominated by hornblende gabbro, quartz diorite, monzodiorite ...
Soraya Dadfar   +3 more
doaj   +1 more source

The Study of amphibolites in‏ ‏Bahram Gor area (northwest of ‎Gol-e Gohar mine in Sirjan), with emphasis on mineral ‎paragenesis and whole rock chemical data [PDF]

open access: yesپترولوژی, 2019
The study area is located northwest of Gol-e Gohar mine (Bahram Gur Protected Zone) in Sirjan, the Kerman Province, a part of the Sanandaj-Sirjan zone.
Seyyed Hesamaddin Moeinzadeh   +2 more
doaj   +1 more source

Petrogenesis and tectonic setting of Aftabru-Qlichkandi High-K metaluminous intrusive bodies (South of Buin-Zahra): Evidences from Nd-Sr isotopic Data [PDF]

open access: yesپترولوژی, 2022
Granites are the most important components of the continental crusts. As an important part of the Alpine-Himalayan global belt and the result of the Tethys evolutionary cycle, the Urmia-Dokhtar Magmatic Arc (UDMA) has formed during different magmatic ...
Hassan Gohari   +5 more
doaj   +1 more source

Ecology of Subseafloor Crustal Biofilms

open access: yesFrontiers in Microbiology, 2019
The crustal subseafloor is the least explored and largest biome on Earth. Interrogating crustal life is difficult due to habitat inaccessibility, low-biomass and contamination challenges. Subseafloor observatories have facilitated the study of planktonic
Gustavo A. Ramírez   +6 more
doaj   +1 more source

Alkaline lamprophyres from the Sokli complex, northern Finland [PDF]

open access: yesBulletin of the Geological Society of Finland, 1978
Alkaline lamprophyric dykes in the Sokli carbonatite complex closely resemble kimberlites in mineralogical and chemical composition. Mineralogically, they differ from kimberlites by the presence of high-manganese ilmenite and richterite, and the absence ...
H. Vartiainen, P. Kresten, Y. Kafkas
doaj   +1 more source

Van Gölü’nün doğusundaki Otlakbaşı bazaltik volkanizmasının petrolojik ve jeokimyasal evrimi

open access: yesBulletin of the Mineral Research and Exploration, 2018
Van Gölü’nün doğusundaki çarpışma ile ilişkili Otlakbaşı volkanizması farklı açılma çatlaklarından püskürerek meydana gelmiştir. Bu çalışmada, Otlakbaşı bazaltik volkanizmasının yeni yaş verisi ve ana oksit, iz ve nadir toprak element jeokimyasal ...
Vural OYAN
doaj   +1 more source

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