Cassiterite U-Pb Dating of No.134 Pegmatite Vein in the Jiajika Rare Metal Deposit, Western Sichuan and Its Geological Significances

ZHOU Xiong; ZHOU Yu; SUN Bao-wei; TAN Hong-qi; YUE Xiang-yuan; ZHU Zhi-min

doi:10.15898/j.cnki.11-2131/td.202005060006

2021 Vol. 40, No. 1

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ZHOU Xiong, ZHOU Yu, SUN Bao-wei, TAN Hong-qi, YUE Xiang-yuan, ZHU Zhi-min. Cassiterite U-Pb Dating of No.134 Pegmatite Vein in the Jiajika Rare Metal Deposit, Western Sichuan and Its Geological Significances[J]. Rock and Mineral Analysis, 2021, 40(1): 156-164. doi: 10.15898/j.cnki.11-2131/td.202005060006

Citation:

ZHOU Xiong, ZHOU Yu, SUN Bao-wei, TAN Hong-qi, YUE Xiang-yuan, ZHU Zhi-min. Cassiterite U-Pb Dating of No.134 Pegmatite Vein in the Jiajika Rare Metal Deposit, Western Sichuan and Its Geological Significances[J]. Rock and Mineral Analysis, 2021, 40(1): 156-164. doi: 10.15898/j.cnki.11-2131/td.202005060006

Cassiterite U-Pb Dating of No.134 Pegmatite Vein in the Jiajika Rare Metal Deposit, Western Sichuan and Its Geological Significances

1.
Institute of Multipurpose Utilization of Mineral Resources, Chinese Academy of Geological Sciences, Chengdu 610041, China
2.
Technology Innovation Center of Rare Earth Resources Application, China Geological Survey, Chengdu 610041, China
3.
Technology Innovation Center of Rare Earth Resources Development and Utilization, China Geological Survey, Chengdu 610041, China
4.
The 405 Geological Brigade of Sichuan Bureau of Geology&Mineral Resources, Dujiangyan 611830, China

Received Date: 25 April 2020

Revised Date: 14 July 2020

Accepted Date: 19 September 2020

Publish Date: 28 January 2021

Abstract

Abstract

BACKGROUND
The pegmatite lithium deposit has become important for modern industries with strategic value, which is a key mineral resource in urgent need in China. However, the mineralization age restricts the research on the mineralization process and mechanism of this type of lithium deposit. The Jiajika rare metal deposit is the largest pegmatite lithium deposit of China in the western Sichuan, and the No.134 vein is the most typical pegmatite vein. The No.134 pegmatite vein is mainly composed of spodumene, tantalite, zircon, beryl, cassiterite, plagioclase, orthoclase, quartz and muscovite.
OBJECTIVES
To accurately constrain the mineralization age of the No.134 pegmatite vein.
METHODS
Laser ablation-multiple collector-inductively coupled plasma-mass spectrometry (LA-MC-ICP-MS) U-Pb geochronology was used on cassiterite.
RESULTS
The concordant age in the ore samples was 203.7±4.6Ma, which represented the mineralization age of No.134 pegmatite vein. This age indicated mineralization in the Late Indosinian period.
CONCLUSIONS
The stable tectonic environment in the Late Indosinian movement is the favorable condition for accumulation and mineralization of rare metals, which is beneficial for the formation of the super-large Jiajika rare metal deposit.
- cassiterite U-Pb dating /
- geochronology /
- pegmatitic lithium deposit /
- Jiajika /
- western Sichuan

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References

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