کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6442193 | 1639595 | 2016 | 30 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Kiosk domain, Central Gneiss Belt, Grenville Province, Ontario: A Labradorian palimpsest preserved in the ductile deep crust
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
ژئوشیمی و پترولوژی
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چکیده انگلیسی
The record of Paleo- early Mesoproterozoic igneous-metamorphic history preserved in the Kiosk core is complemented by detrital zircon data from a quartzite member of a metasedimentary assemblage. The detrital zircon display an age concentration spanning ca. 1500-2000Â Ma with a Penokean (ca. 1850Â Ma) maximum. Pre-Labradorian components of the age spectrum are similar to published spectra from the Penokean Upper Animikie sediments from the Lake Superior region and may represent reworking of these during early Pinwarian deposition on the Labradorian basement. We speculate that the Kiosk metasediments, metamorphosed at high grade with their hosts at ca. 1459Â Ma represent a pre-or early-Pinwarian back-arc (age of youngest detrital grain, ca. 1500Â Ma) in Labradorian crust inverted in the Pinwarian Orogeny and consistent with A-type plutonism of this age present in the Central Gneiss Belt and interpreted to have been emplaced in extended back-arc crust. The Kiosk domain is thus established as a Labradorian member of the peri-Laurentian Great Paleoproterozoic Accretionary Orogen (Condie, 2013), having received detritus from other members of the accretionary orogen as well as Laurentia.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Precambrian Research - Volume 280, July 2016, Pages 249-278
Journal: Precambrian Research - Volume 280, July 2016, Pages 249-278
نویسندگان
Nicholas Culshaw, John Foster, Jeff Marsh, Trond Slagstad, Chris Gerbi,