Thermal History of the Naruo Porphyry Deposit in the Duolong Ore District, Western Tibet: Evidence from U-Pb, 40Ar/39Ar and (U-Th)/He Thermochronology

被引：7

作者：

Yang, Huanhuan ^{[1
]}

Fang, Xiang ^{[2
]}

Song, Yang ^{[1
]}

Lin, Bin ^{[1
]}

LI, Yanbo ^{[3
]}

Wang, Qin ^{[4
]}

Liu, Zhibo ^{[1
]}

He, Long ^{[5
]}

Zhang, Qi ^{[6
]}

Fu, Xuelian ^{[4
]}

机构：

[1] Chinese Acad Geol Sci, Inst Mineral Resources, MNR Key Lab Metallogeny & Mineral Assessment, Beijing 100037, Peoples R China

[2] Chinese Acad Geol Sci, Beijing 100037, Peoples R China

[3] 5 Geol Brigade Tibet Bur Geol & Mineral Explorat &, Golmud 816000, Qinghai, Peoples R China

[4] Chengdu Univ Technol, Coll Earth Sci, Chengdu 610059, Peoples R China

[5] 606 brigade Sichuan Met Geol Explorat Bur, Chengdu 611730, Peoples R China

[6] China Univ Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China

来源：

ACTA GEOLOGICA SINICA-ENGLISH EDITION | 2022年 / 96卷 / 06期

基金：

中国国家自然科学基金;

关键词：

U-Pb age; 40Ar; 39Ar; (U-Th); He; magmatic-hydrothermal history; Naruo porphyry deposit; Tibet; MAGMATIC-HYDROTHERMAL EVOLUTION; CU-AU; CRETACEOUS MAGMATISM; ACCRETIONARY WEDGE; TECTONIC EVOLUTION; METALLOGENIC BELT; COPPER-DEPOSIT; AREA EVIDENCE; RE-OS; EXHUMATION;

D O I：

10.1111/1755-6724.14955

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

The Naruo porphyry copper deposit containing more than 2 Mt of copper is located in the Duolong ore district in the west of the Bangongco-Nujiang belt in central Tibet. New zircon U-Pb, biotite 40Ar/39Ar, zircon (U-Th)/He ages, published age data together with thermal modeling were presented in this paper to investigate the thermal history of Naruo deposit. Thermal modeling reveals a prolonged magmatic-hydrothermal evolution firstly cooling from similar to 700 degrees C to similar to 350 degrees C at 120 Ma, then cooling to 230 degrees C at 106 Ma and maintaining at 200 degrees C from 106 to 90 Ma which is attributed to multiple magmatic events and thermal effect of strike-slip fault. Affected by thrust nappe structure, the sample was consistent with 120 degrees C from 70 to 63 Ma. The Naruo deposit started to experience exhumation at a rate of similar to 0.07 km/Myr since 60 Ma which is related to India-Asia collision. The prolonged magmatic-hydrothermal evolution process might have important influence on the Naruo deposit. The ore-related intrusions preserved in the foot walls of strike-slip fault and thrust nappe structure are the objects of future exploration in the Duolong ore district.

引用

页码：2015 / 2027

页数：13

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