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引用本文:曾庆权,胡正华,王先广,龚良信,聂龙敏,李倩. 江西省都昌县阳储岭钨钼矿年代学研究[J]. 中国地质, 2019, 46(4): 841-849.
ZENG Qingquan,HU Zhenghua,WANG Xianguang,GONG Lingxin,NIE Longmin,LI Qian. Geochronology of the Yangchuling tungsten-molybdenum depoist in Duchang County, Jiangxi Province[J]. Geology in China, 2019, 46(4): 841-849(in Chinese with English abstract).
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江西省都昌县阳储岭钨钼矿年代学研究
曾庆权1, 胡正华2, 王先广2, 龚良信1, 聂龙敏1, 李倩1
1.江西省地质调查研究院, 江西 南昌 330000;2.江西省地质勘查基金管理中心, 江西 南昌 330030
摘要:
江西省都昌县阳储岭钨钼矿床位于江南造山带东段,为准确厘定阳储岭钨钼矿床的成岩成矿时代,本次在详实的野外地质调查基础上,对阳储岭成矿花岗闪长斑进行锆石U-Pb定年工作,同时开展辉钼矿Re-Os同位素定年研究。LA-ICP-MS锆石U-Pb年龄为(145.08±0.35)Ma(MSWD=0.51,n=7);辉钼矿Re-Os模式年龄为(143.3±2.0)Ma~(145.5±2.2)Ma,等时线年龄为(145.4±1.0)Ma。阳储岭成矿花岗闪长斑岩锆石U-Pb年龄与辉钼矿Re-Os等时线年龄基本一致,表明阳储岭钨钼矿床成岩成矿时代约为145 Ma。辉钼矿中Re含量为16.62×10-6~87.76×10-6,平均值为44.68×10-6,与壳幔混源岩浆热液矿床中Re的含量相似,指示阳储岭钨钼矿床成矿物质来源于壳幔混源。
关键词:  阳储岭  锆石U-Pb  辉钼矿Re-Os  钨钼矿  江西
DOI:10.12029/gc20190414
分类号:P597;P618.65;P618.67
基金项目:中国地质调查局项目(DD20160082,DD20190012)与江西省地勘基金项目(20160037)联合资助。
Geochronology of the Yangchuling tungsten-molybdenum depoist in Duchang County, Jiangxi Province
ZENG Qingquan1, HU Zhenghua2, WANG Xianguang2, GONG Lingxin1, NIE Longmin1, LI Qian1
1.Geological Survey of Jiangxi Province, Nanchan 330000, Jiangxi, China;2.Administration of Geological exploration Fund of Jiangxi, Nanchan 330000, Jiangxi, China
Abstract:
The Yangchuling tungsten-molybdenum deposit in Duchang County, Jiangxi Province, is located in the eastern part of the Jiangnan orogenic belt. In order to accurately define the diagenetic and mineralization ages of the Yangchuling W-Mo deposit, the authors carried out the zircon U -Pb dating of mineralization -associated granodiorite porphyry and Re -Os isotope dating of molybdenite in the Yangchuling deposit based on detailed field geological studies. The zircon LA-ICP-MS U-Pb age is (145.08±0.35)Ma (MSWD=0.03, n=22), the Re-Os model ages of molybdenite range from (143.3±2.0)Ma to (145.5±2.2)Ma, and the Re-Os isochron age is (145.4±1.0)Ma. The geochronological consistency between the ore-bearing porphyry and molybdenite indicates that the diagenesis and mineralization ages of the Yangchuling tungsten-molybdenum deposit are about 145 Ma. The ω(Re) values of molybdenite range from 16.62×10-6 to 87.76×10-6, averaging 44.68×10-6, similar to Re content in crust -mantle mixed source magmatic hydrothermal deposits, indicating that the ore-forming materials of the Yangchuling W-Mo deposit should have come from crust-mantle mixed source.
Key words:  Yangchuling  zircon U-Pb  molybdenite Re-Os  tungsten-molybdenum deposit  Jiangxi