Geological and geochemical characteristics and age of gran-ite porphyry in the Hongdoushan copper deposit, South Langcangjiang belt, western Yunnan Province

WANG Lei; WANG Jiasheng; WANG Lei; GUO Zehua; HAN Runsheng; LIU Fei; CUI Junhao

2017 Vol. 36, No. 7

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WANG Lei, WANG Jiasheng, WANG Lei, GUO Zehua, HAN Runsheng, LIU Fei, CUI Junhao. Geological and geochemical characteristics and age of gran-ite porphyry in the Hongdoushan copper deposit, South Langcangjiang belt, western Yunnan Province[J]. Geological Bulletin of China, 2017, 36(7): 1231-1241.

Citation:

WANG Lei, WANG Jiasheng, WANG Lei, GUO Zehua, HAN Runsheng, LIU Fei, CUI Junhao. Geological and geochemical characteristics and age of gran-ite porphyry in the Hongdoushan copper deposit, South Langcangjiang belt, western Yunnan Province[J]. Geological Bulletin of China, 2017, 36(7): 1231-1241.

Geological and geochemical characteristics and age of gran-ite porphyry in the Hongdoushan copper deposit, South Langcangjiang belt, western Yunnan Province

1.
Faculty of Land Resource Engineering, Kunming University of Science and Techology, Kunming 650093, Yunnan, China
2.
Southwest Institute of Geological Survey, Geological Survey Center for Nonferrous Metals Resources, Kunming 650093, Yunnan, China

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Corresponding authors: WANG Jiasheng, jiashengwang@126.com ; WANG Lei, 120901163@qq.com

Received Date: 12 October 2016

Revised Date: 02 March 2017

Publish Date: 25 July 2017

Abstract

Abstract

The Hongdoushan granite porphyry in the South Langcangjiang volcanic arc zone is a peraluminous and shoshonite Stype granitoid. The granite porphyry contains 71.1%~74.4% of SiO₂, high total alkalis (K₂O+Na₂O=8.4%~9.4%), high K and high A/CNK of 1.06~1.21, and is characterized by enrichment of light rare earth elements with negative europium anomalies (δEu=0.53~0.74), relative enrichment of large ion lithophile elements (LILE) such as Rb, Ba, Th and U, and relative depletion of Sr, P and Ti. Geochemical features indicate that the Hongdoushan granite porphyry has characteristics of volcanic arc granite and syn-collision granite, and is epicontinental arc-volcanic rock. LA-ICP-MS zircon U-Pb dating age of the Hongdoushan granite porphyry is 220.3±3.6Ma, indicating that the rock was formed during Late Triassic. Geochemical features and formation age of the Hongdoushan granite porphyry is very similar to features of basic volcanic rock of Xiaodingxi Formation, which suggests that they are products of different stages of the same magmation.
- South Langcang belt /
- granite porphyry /
- LA-ICP-MS zircon U-Pb age /
- geochemistry /
- Xiaodingxi Formation

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References

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