The Re-Os Isotopic Dating of Molybdenite from the Wulandele Molybdenum-Copper Polymetallic Deposit in Sonid Zuoqi of Inner Mongolia and Its Geological Significance

TAO Jixiong; WANG Tao; CHEN Zhenghui; LUO Zhongze; XU Liquan; HAO Xianyi; CUI Laiwang

2009 Vol. 28, No. 3

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Article navigation > Rock and Mineral Analysis > 2009 > 28(3): 249-253

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TAO Jixiong, WANG Tao, CHEN Zhenghui, LUO Zhongze, XU Liquan, HAO Xianyi, CUI Laiwang. The Re-Os Isotopic Dating of Molybdenite from the Wulandele Molybdenum-Copper Polymetallic Deposit in Sonid Zuoqi of Inner Mongolia and Its Geological Significance[J]. Rock and Mineral Analysis, 2009, 28(3): 249-253.

Citation:

The Re-Os Isotopic Dating of Molybdenite from the Wulandele Molybdenum-Copper Polymetallic Deposit in Sonid Zuoqi of Inner Mongolia and Its Geological Significance

1.
Institute of Geological Survey of Inner Mongolia Autonomous Region
2.
Institute of Geological Survey of Inner Mongolia Autonomous Region
3.
China University of Geosciences (Beijing)， Institute of Mineral Resources Chinese Academy of Geological Sciences
4.
Institute of Geological Survey of Inner Mongolia Autonomous Region
5.
Institute of Geological Survey of Inner Mongolia Autonomous Region
6.
Institute of Geological Survey of Inner Mongolia Autonomous Region
7.
Institute of Geological Survey of Inner Mongolia Autonomous Region

Received Date: 10 February 2009

Revised Date: 16 March 2009

Publish Date: 28 June 2009

Abstract

Abstract

The Wulandele molybdenum-copper polymetallic deposit in Sonid Zuoqi, Inner Mongolia is a newly discovered large deposit during the geological survey in the Erlian-Dongwuqi metallogenic belt of Inner Mongolia. As a typical porphyry molybdenum deposit, its major ore bodies mainly occur in the fine-grained monzonitic granite with veinlet-disseminated ore, mediumfine grained granodiorite and fine-grained quartz diorite with disseminated ore. Molybdenite from the veinlet-disseminated ore hosted by granodiorite between 211.2 m and 214 m in the drilling hole of WZK1, is dated and its Re-Os isochron age is （134.1±3.3） Ma. Meanwhile the SHRIMP zircon U-Pb age of the fine-grained monzonitic granite is （131.4±1.6） Ma. These precise dating results represent the ore-forming period of this molybdenum deposit, the main dominant geological events and suggest its close relationship with buried Yanshan fine-grained monzonitic granite. It also indicates that the more attention on mineralization related to the tectonic-magmatic activities in the Late Yanshanian period should be paid in future prospecting.
- the /
- Wulandele /
- molybdenum-copper /
- polymetalic