Metallogenesis and Metallogenic Differences of the Early Mesozoic Granites in the Yichun Area, Heilongjiang Province
详细信息
- 责任者：Li Yangchun (State Key Laboratory of Geological Processes and Mineral Resources ; School of Earth Science and Resource ; China University of Geosciences ; Beijing 100083 ; China) ; Han Zhenzhe
- 刊名：Geology and Prospecting
- 出版年：2013
- 卷期：49(1)
- 关键词：花岗岩 ; granite ; 多金属矿 ; polymetallic ores ; 黑龙江省 ; Heilongjiang Province
- 页码：p.28-38
- 图表：illus., 2 tables, 23 refs.
- 分类号：1001
- issnNo：ISSN0495-5331
- isbnNo：CN11-2043/P
摘要
The late Triassic to early Jurassic granites are widely distributed in the Yichun area,Heilongjiang Province,which are dominated by porphyaceous monzonitic granite,monzonitic granite porphyry,syenogranite,alkali-feldspar granite and alkali granite.And the discovered iron-plolymetallic deposits and gold deposits related to these rocks are mainly of porphyry,skarn,skarn-hydrothermal,magmatic hydrothermal and epithermal hydrothermal types.The major rock-forming and ore-forming ages are late Triassic to early Jurassic(U-Pb zircon LA-ICPMS age of 191~225Ma),and the ore-forming age is slightly later than the metallogenic epoch.This paper studies the major rock types,geologic ages,tectono-magmatic evolution,genetic types of the early Mesozoic granites and mineralization characteristics of different continental-collision stages.We divide the metallogenic series into two metallogenic subseries:the Mo-Pb-Zn-Fe-W-Au(Ag) metallogenic subseries of porphyaceous monzonitic granite-monzonitic granite porphyry of continental collisional-postcollisional structural transposition and the Fe-Mo-Pb-Zn-NbTa metallogenic subseries of syenogranite-alkali-feldspar granite-alkali granite of postcollisional collapse episode.These two metallogenic subseries differ in metallogenic features,i.e.,ore-forming elements,mineralization intensity and types.And these differences are related with granite source areas,the degree of crust-mantle mixture,mixture ratio,granite emplacement depth and metallogenic tectonic background.
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