Contrasting geochemical signatures of Devonian and Permian granitoids from the Tseel Terrane, SW Mongolia
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چکیده
منابع مشابه
Contrasting geochemical signatures on land from the Middle and Late Permian extinction events
The end of the Palaeozoic is marked by two mass-extinction events during the Middle Permian (Capitanian) and the Late Permian (Changhsingian). Given similarities between the two events in geochemical signatures, such as large magnitude negative dC anomalies, sedimentological signatures such as claystone breccias, and the approximate contemporaneous emplacement of large igneous provinces, many a...
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TheEmeishan large igneous province contains a diverse assemblage of igneous rocks includingmildly peralkaline granitic rocks ofA-type affinity. The granitic rocks from the Panzhihua, Baima andTaihe plutons are temporally, spatially and chemically associatedwith layeredmafic-ultramafic intrusions. Electronmicroprobe analyses of themajor and accessoryminerals along with major and trace element da...
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[1] A series of sharp bends (oroclines) are recognized in the Paleozoic to early Mesozoic New England Orogen of eastern Australia. The exact geometry and origin of these bends is obscured by voluminous magmatism and is still debated. Here we present zircon U-Pb ages that confirm the lateral continuation of early Permian (296–288 Ma) granitoids and shed new light on the oroclinal structure. Orog...
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پس ازفروپاشی شوروی،رشد منابع نفت و گاز، آسیای میانه و قفقاز را در یک بازی ژئوپلتیکی انرژی قرار داده است. با در نظر گرفتن این منابع هیدروکربنی، این منطقه به یک میدانجنگ و رقابت تجاری برای بازی های ژئوپلتیکی قدرت های بزرگ جهانی تبدیل شده است. روسیه منطقه را به عنوان حیات خلوت خود تلقی نموده و علاقمند به حفظ حضورش می باشد تا همانند گذشته گاز طبیعی را به وسیله خط لوله مرکزی دریافت و به عنوان یک واس...
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Ori en ta tion sur veys are an es sen tial part of any largescale geo chem i cal pro gram be cause they serve to es tab lish op ti mum sam pling and an a lyt i cal tech niques. Among vari ables that need to be de ter mined by a soils ori en ta tion are the sam ple den sity, soil ho ri zon, sam ple grain size or min eral frac tion, and an a lyt i cal method. Es tab lish ing geo chem i cal back g...
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ژورنال
عنوان ژورنال: Journal of Geosciences
سال: 2016
ISSN: 1803-1943,1802-6222
DOI: 10.3190/jgeosci.210