Results 61 to 70 of about 530 (129)

THE PROBLEM OF METASOMATISM

Bulletin of the Mineral Research and Exploration, 1970
 Metasomatism consists of volume-by-volume replacement of minerals androcks, as evidenced by pseudomorphs, preservation of older textures, and bulging contacts withwalls which do not «match». Serious petrographers admit that microscopic textures may often beexplained in different ways, and refer to geological and geochemical considerations for ...
openaire   +3 more sources

Wehrlite xenoliths and petrogenetic implications, Hosséré Do Guessa volcano, Adamawa plateau, Cameroon

Open Geosciences, 2022
Nkouandou Oumarou Faarouk, Bardintzeff Jacques-Marie, Ndassa Zénab Nouraan Njankouo, Mefire Aminatou Fagny, Haman Adama   +4 more
doaj   +1 more source

A HIMU‐Like Endmember Hiding in the Turkana Depression Continental Lithospheric Mantle

Geochemistry, Geophysics, Geosystems
The fate of continental lithosphere during rifting is central to the process of continental extension. The continental lithospheric mantle comprises both depleted and enriched domains that may contribute to magma generation during extension.
Andrew R. Bollinger, Tyrone O. Rooney, Eric L. Brown, Frank C. Ramos   +3 more
doaj   +1 more source

ANKARA GB’SINDA YER ALAN OYACA-KEDİKAYASI-BOYALIK (ORTA ANADOLU, TÜRKİYE) ADAKİTLERİNİN PETROJENETİK ÖZELLİKLERİ: YİTİM DİLİMİ KÖKENLİ ERGİYİK METASOMATİZMASINA KANITLAR

Bulletin of the Mineral Research and Exploration, 2013
Ankara’nın yaklaşık 50-60 km güneybatısında yer alan erken Miyosen yaşlı Oyaca, Kedikayası ve Boyalık dasitleri adakit ve/veya adakitik kayaçlara benzer özelliklere sahiptir.
Pınar ŞEN, Erdal ŞEN
doaj  

Features of development of new direction exploration work in the Eastern region Ukraine. Article 1. The objective difficulties mapping complex base

Мінеральні ресурси України, 2016
Base oil and gas complex, of which the new area exploration in the Eastern region of Ukraine consists of lower (subsurface section Precambrian basement) and upper (Precambrian weathering crust, roofing layers of sedimentary rock) sub.
V. P. Lebed
doaj  

Metasomatism

, 2006
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Petrological and geochemical features of Biga Peninsula granitoids, NW Anatolia, Turkey

Bulletin of the Mineral Research and Exploration, 2019
Ümit AYDIN, Pınar ŞEN, Öner ÖZMEN, Erdal ŞEN   +3 more
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Polymineral-Metasomatic Crystallogenesis [PDF]

, 2009
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Contact metasomatism

, 2006
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Why metasomatic fronts are really metasomatic sides

Geology, 1995
Back-scattered electron microscope images of metasomatic calc-silicate rocks demonstrate complex mineral growth patterns; often oscillatory zoning defines a euhedral or subhedral morphology. We infer from this the existence of an appreciable transient porosity (up to a few percent) during metasomatic calc-silicate growth, and argue that porous ...
Bruce W. D. Yardley, Geoff E. Lloyd
openaire   +1 more source