The Discovery of Late Jurassic Volcanic Rocks in Lengshuikeng, Jiangxi and Their Geological Significance

YU Ming-gang; ZHAO Xi-lin; QIAN Mai-ping; DUAN Zheng; ZHANG Xue-hui; WAN Hao-zhang; XIAO Mao-zhang; SUN Jian-dong

doi:10.15898/j.cnki.11-2131/td.2015.01.018

2015 Vol. 34, No. 1

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Article navigation > Rock and Mineral Analysis > 2015 > 34(1): 138-149

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YU Ming-gang, ZHAO Xi-lin, QIAN Mai-ping, DUAN Zheng, ZHANG Xue-hui, WAN Hao-zhang, XIAO Mao-zhang, SUN Jian-dong. The Discovery of Late Jurassic Volcanic Rocks in Lengshuikeng, Jiangxi and Their Geological Significance[J]. Rock and Mineral Analysis, 2015, 34(1): 138-149. doi: 10.15898/j.cnki.11-2131/td.2015.01.018

Citation:

YU Ming-gang, ZHAO Xi-lin, QIAN Mai-ping, DUAN Zheng, ZHANG Xue-hui, WAN Hao-zhang, XIAO Mao-zhang, SUN Jian-dong. The Discovery of Late Jurassic Volcanic Rocks in Lengshuikeng, Jiangxi and Their Geological Significance[J]. Rock and Mineral Analysis, 2015, 34(1): 138-149. doi: 10.15898/j.cnki.11-2131/td.2015.01.018

The Discovery of Late Jurassic Volcanic Rocks in Lengshuikeng, Jiangxi and Their Geological Significance

1.
School of Earth Science and Engineering, Nanjing University, Nanjing 210093, China
2.
Nanjing Institute of Geology and Mineral Resources, Nanjing 210016, China
3.
No.912 Team, Jiangxi Bureau of Geology and Mineral Exploration and Development, Yingtan 335001, China

More Information

Corresponding author: ZHAO Xi-lin, zxl24@126.com

Received Date: 28 April 2014

Revised Date: 01 August 2014

Accepted Date: 12 December 2014

Publish Date: 25 January 2015

Abstract

Abstract

The Jiangxi Lengshuikeng ore field, characterized as porphyry deposits and volcanic sedimentary hydrothermal reworking deposits, is one of the major Ag-Pb-Zn ore concentration areas in Wuyi Mountain area. There has been much research carried out on mineralization, the metallogenic model, and ore-controlling structure of the Lengshuikeng deposit. However, it is still unclear about the relationship of different geological bodies with mineralization and magmatism. In this paper, a description of a zircon LA-ICP-MS U-Pb geochronology approach and its implementation on the volcanic rock of Daguding Formation and ore-bearing granite porphyry is given. The crystal tuffs from the top and bottom of Daguding Formation and ore bearing granite porphyry yield U-Pb age of 161.3±1.3 Ma, 160.75±0.96 Ma and 168.09±0.80 Ma, respectively. These results indicate that there were three stages of volcano-magmatic activities in the Lengshuikeng ore field with ages of 164-170 Ma, 157-161 Ma, and 140-146 Ma, respectively. The 157-161 Ma is the main metallogenic epoch of the volcanic sedimentary-hydrothermal reworking type deposit and porphyry type deposit. The discovery of the late Jurassic volcanic rocks in Lengshuikeng provides the important geological evidence for the detailed study of the Mesozoic tectonic regime transition in South China.
- Daguding Formation /
- ore-bearing granite porphyry /
- Laser Ablation Inductively Coupled Plasma-Mass Spectrometry (LA-ICP-MS) /
- zircon U-Pb dating /
- tectonic transition /
- Lengshuikeng in Jiangxi

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