کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8912751 | 1639572 | 2017 | 53 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Petrogenesis of the Late Archean (â¼2.5Â Ga) Na- and K-rich granitoids in the Zhongtiao-Wangwu region and its tectonic significance for the crustal evolution of the North China Craton
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
ژئوشیمی و پترولوژی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Petrogenesis of coexisting Late Archean (â¼2.5Â Ga) Na- and K-rich granitoids in the Zhongtiao-Wangwu region is significant for understanding the crustal evolution of the North China Craton (NCC). In this paper, we present new zircon U-Pb age, and whole-rock geochemical and isotope data on a â¼2.5Â Ga Na- and K-rich granitoid suite from the Zhongtiao-Wangwu region, southern NCC. The Na-rich granitoids (TTG) and K-rich granitoids (A-type granites) are zircon U-Pb dated to be 2.45Â Ga and 2.49Â Ga, respectively. Integrated geochemical data indicate that the TTG were formed by partial melting of the mafic lower crust, while the A-type granites were formed by partial melting of a TTG-like source in the shallower crust. The petrogenesis likely occurred under lithospheric delamination and the subsequent asthenospheric upwelling and mafic magma underplating. We proposed that the coeval occurrence of Na- and K-rich granitoids in the southern NCC is probably ascribed to the partial melting of continental crust at different depths, which could be an important way to induce the Archean crustal reworking and compositional changes at â¼2.5Â Ga.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Precambrian Research - Volume 303, December 2017, Pages 590-603
Journal: Precambrian Research - Volume 303, December 2017, Pages 590-603
نویسندگان
Yan Zhao, Ningbo Li, Yuhang Jiang, Hecai Niu,