Molybdenite Re-Os isochron age of the Chiwawu Mo-Cu deposit in Fuping County, Hebei Province in northern Taihang Mountains and its prospecting significance

ZHANG Zhiyuan; WANG Wenhao; DING Zhaoyue; AN Yuehui; WANG Zhimin; CHEN Zhikuan; XIE Guiqing

2021 Vol. 40, No. 9

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ZHANG Zhiyuan, WANG Wenhao, DING Zhaoyue, AN Yuehui, WANG Zhimin, CHEN Zhikuan, XIE Guiqing. Molybdenite Re-Os isochron age of the Chiwawu Mo-Cu deposit in Fuping County, Hebei Province in northern Taihang Mountains and its prospecting significance[J]. Geological Bulletin of China, 2021, 40(9): 1522-1529.

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ZHANG Zhiyuan, WANG Wenhao, DING Zhaoyue, AN Yuehui, WANG Zhimin, CHEN Zhikuan, XIE Guiqing. Molybdenite Re-Os isochron age of the Chiwawu Mo-Cu deposit in Fuping County, Hebei Province in northern Taihang Mountains and its prospecting significance[J]. Geological Bulletin of China, 2021, 40(9): 1522-1529.

Molybdenite Re-Os isochron age of the Chiwawu Mo-Cu deposit in Fuping County, Hebei Province in northern Taihang Mountains and its prospecting significance

1.
Hebei Key Laboratory of Strategic Critical Mineral Resources, Hebei GEO University, Shijiazhuang 050031, Hebei China
2.
Hebei Geological Engineering Exploration Institute, Baoding 071051, Hebei, China
3.
Institute of Earth Sciences, China University of Geosciences, Beijing 100083, China

More Information

Corresponding author: WANG Wenhao, wwh198@163.com

Received Date: 31 October 2020

Revised Date: 16 December 2020

Publish Date: 15 September 2021

Abstract

Abstract

The Chiwawu porphyry Mo-Cu deposit in the northern Taihang Mountains porphyry-skarn metallogenic belt is a medium-sized one discovered in recent years.The Mo-Cu orebodies are mainly hosted within porphyritic granodiorite of internal facies in Chiwawu pluton.In order to determine the age of mineralization and the source of molybdenum, seven molybdenite samples were collected from the Chiwawu Mo-Cu deposit for Re-Os dating.The Re-Os dating yields model ages ranging from129.1 Ma to130.6 Ma, with a weighted mean age of 129.7±0.7 Ma, and obtains an isochron age of 128.7±4.4 Ma.Evidently, model ages are consistent with isochron age within the error ranges, which constrains the ore-forming age of Chiwawu Mo-Cu deposit at the Early Cretaceous.The Re values of molybdenum vary in the range of 25.9×10^-6~37.1×10^-6, indicating that they were derived from mixing of crust and mantle sources.Combined with available chronologic data, it is recognized that a regional magmatic-metallogenic event might exist during the 134~124 Ma in northern Taihang Mountains.The prospecting potentiality of porphyry Cu-Mo deposits is great in this area.
- molybdenite /
- Re-Os isotopic ages /
- porphyry Mo-Cu deposit /
- petrogenic and metallgogenic ages /
- Chiwawu /
- northern Taihang Mountains

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