کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4697097 1637239 2015 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Significant Zn–Pb–Cu remobilization of a syngenetic stratabound deposit during regional metamorphism: A case study in the giant Dongshengmiao deposit, northern China
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات زمین شناسی اقتصادی
پیش نمایش صفحه اول مقاله
Significant Zn–Pb–Cu remobilization of a syngenetic stratabound deposit during regional metamorphism: A case study in the giant Dongshengmiao deposit, northern China
چکیده انگلیسی

The giant Dongshengmiao Zn–Pb–Cu deposit is located in the Langshan district, northern China. The ores are hosted within a Proterozoic rift sequence, which underwent lower greenschist facies metamorphism and shear deformation during development of Early Cretaceous intraplate orogenic belt. Northwest-dipping thrust faults, which share similar orientations and dip angles with the orebodies, are well developed in the mining area. Syngenetic stratabound sulfides were formed during the Proterozoic rifting event, but syngenetic ore textures have seldom been preserved except for some pretectonic fine-grained pyrite. Petrological observation, 39Ar/40Ar geochronology, combined with previous isotopic and fluid inclusion studies indicates that significant Zn–Pb–Cu remobilization took place as a result of thrust faulting associated with metamorphic devolatilization of ore-hosting rocks at ca. 136 Ma, coeval with the intraplate orogeny and regional crustal shortening. Sulfides were redistributed in shear structures or along grain boundaries of ore-hosting carbonates, and Fe-rich carbonates were ideal sites for Zn–Pb–Cu precipitation.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ore Geology Reviews - Volume 64, January 2015, Pages 89–102
نویسندگان
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