Lead Isotope Geochemistry in the Qulong-Jiama-Bangpu Ore Concentrated Area of Tibet

Li-juan YING; Kuo WANG; Kai-jian WANG

doi:10.15898/j.cnki.11-2131/td.2016.03.016

2016 Vol. 35, No. 3

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Article navigation > Rock and Mineral Analysis > 2016 > 35(3): 320-328

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Li-juan YING, Kuo WANG, Kai-jian WANG. Lead Isotope Geochemistry in the Qulong-Jiama-Bangpu Ore Concentrated Area of Tibet[J]. Rock and Mineral Analysis, 2016, 35(3): 320-328. doi: 10.15898/j.cnki.11-2131/td.2016.03.016

Citation:

Li-juan YING, Kuo WANG, Kai-jian WANG. Lead Isotope Geochemistry in the Qulong-Jiama-Bangpu Ore Concentrated Area of Tibet[J]. Rock and Mineral Analysis, 2016, 35(3): 320-328. doi: 10.15898/j.cnki.11-2131/td.2016.03.016

Lead Isotope Geochemistry in the Qulong-Jiama-Bangpu Ore Concentrated Area of Tibet

1.
Key Laboratory of Metallogeny and Mineral Assessment, Ministry of Land and Resources;Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China
2.
School of Earth Sciences and Resources, China University of Geosciences (Beijing), Beijing 100083, China

More Information

Corresponding author: Kuo WANG, wangkuo@cugb.edu.cn

Received Date: 15 September 2015

Revised Date: 25 April 2016

Accepted Date: 20 May 2016

Abstract

Abstract

The Qulong-Jiama-Bangpu copper polymetallic ore concentration area is one of the most important areas in the Gangdese metallogenic belt of Tibet with more than 15 million tons of copper resources. Ore-forming materials for three deposits were considered to be derived from magma. However, the relationship between magma with different degrees of mineralization and times and copper mineralization are unknown, especially on a regional scale. By collecting the published lead isotope data of ores, intrusions and strata from these three deposits, the lead isotopic composition of ores from Qulong, Jiama and Bangpu are were found to be similar to those of Miocene ore-bearing porphyries but different from those of intrusions unrelated to mineralization. Spatially, from Qulong in the southwest, to Jiama, and to Bangpu in the northeast, the mineralization ages range from old to young, and lead isotopes evolve obviously with radiogenic lead increments (average ²⁰⁶Pb/²⁰⁴Pb values of ores 18.521→18.644→18.684). Lead isotope geochemistry not only indicates the magma source, but also can differentiate between ore-related intrusions from ore-barren intrusions and suggest the relationship between intrusion and mineralization.
- lead isotope /
- source of ore forming materials /
- Qulong-Jiama-Bangpu /
- copper concentration area

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References

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