کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4678720 1634859 2010 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Diamondiferous kimberlites in central India synchronous with Deccan flood basalts
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علوم زمین و سیاره ای (عمومی)
پیش نمایش صفحه اول مقاله
Diamondiferous kimberlites in central India synchronous with Deccan flood basalts
چکیده انگلیسی

Recently discovered diamondiferous kimberlite (Group-II) pipes in central India have surprisingly young 40Ar/39Ar whole rock and U–Pb perovskite ages around 65 million years. These ages overlap with the main phase of the Deccan flood basalt magmatism, and suggest a common tectonomagmatic control for both flood basalts and kimberlites. The occurrence of macrodiamonds in the pipes implies the presence of a thick subcratonic lithosphere at the Cretaceous/Tertiary boundary, significantly different from the present-day thickness of the Indian lithosphere. About one third of the Indian lithosphere was lost during or after the Deccan flood basalt event. The superfast northward motion of the Indian plate prior to the collision with Eurasia cannot be related to lithospheric thinning during the Gondwana break-up at 130 Ma, as previously thought.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Earth and Planetary Science Letters - Volume 290, Issues 1–2, 15 February 2010, Pages 142–149
نویسندگان
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