Geochemistry of Mineralization and Granitic Magmatism of Dayinjian Mo deposit, Xinxian County, Henan Province and Its Geological Significance
详细信息
- 责任者：Yang Meizhen (State Key Laboratory of Geological Processes and Mineral Resources ; China University of Geosciences ; Wuhan 430074 ; China) ; Zeng Jiannian
- 刊名：Acta Geoscientica Sinica
- 出版年：2011
- 卷期：32(3)
- 关键词：钼矿 ; molybdenum ores ; 河南 ; Henan Province
- 页码：p.279-292
- 图表：5 illus., 3 tables, 43 refs.
- 分类号：1001
- issnNo：ISSN1006-3021
- isbnNo：CN11-3474/P
摘要
The Dayinjian Mo deposit located on the northern margin of the Dabie metamorphic core complex rock belt is a typical quartz vein-skarn Mo mineralization related to granitic magmatism. The authors studied petrogeochemistry of Dayinjian mineralized monzonite granite and Pb and S multi-element isotopic trace of granite and ores. According to geochemical characteristics of Dayinjian granite such as relatively low Sr(<50×10-6) and high Yb(>1.8×10-6) content,comparatively strong negative Eu anomaly (δEu<0.5), rather low(La/Yb)N(7.8～9.6) and sea gull-shaped REE distribution pattern, together with the newest geochronologic data, it can be concluded that the magmatism and mineralization of the Dayinjian Mo deposit were related to partial melting of the continental crust with normal thickness after extension and thinning of Dabie orogen, and seemed to be the surface response to the deep dynamic process of lithospheric delamination and thinning in the Dabie orogenic belt.