GEOLOGICAL CHARACTERISTICS OF THE HYDROTHERMAL VEIN TYPE GOLDCOPPER DEPOSITS IN NINGWU BASIN:A Case Study of Tongjing Gold-Copper Deposit in Jiangsu Province
GAO Li-kun, ZOU Zhi-hong, LI Shu-chun, CAI Wei-dong, SUN Xi-hua, QIAN Ling-yu, ZHANG Long-sheng
No. 1 Geological Brigade, Jiangsu Bureau of Geology and Mineral Exploration, Nanjing 210041, China
Abstract：Numerous hydrothermal vein type Au-Cu deposits are distributed in the Ningwu basin. Among them Tongjing Au-Cu deposit is a typical one. The ore bodies are hosted in the composite positions of NNW-trending compressive-shearing faults and ancient volcanic edifices in vein, veinoid and lentiform, with the characteristics of isometric en echelon arrangement. Studies show that Tongjing Au-Cu deposit underwent the early stage of quartz sulfide, mid-stage of quartz sulfide carbonate and late stage of carbonate. The sulfur isotope δ34S of chalcopyrite is 3.63‰, averagely, with 34S/32S of 22.139, suggesting a mantle source. The ore-forming materials of gold and copper are the liquation production in the late period of differentiation and evolution of alkaline basaltic andesitic magma of the Cretaceous Niangniangshan Formation. The ore-forming hydrotherm rose along the compressive-shearing fault structure, and enriched to mineralization in favorable structural spaces. The homogenization temperature of fluid inclusions ranges from 171 to 253℃, with metallogenic depth of 100-400 m. The Tongjing Au-Cu deposit generally belongs to epi-mesothermal filling vein type related to tectono-volcanic activities.
高丽坤, 邹芝红, 李书春, 蔡卫东, 孙喜华, 钱凌宇, 张龙生. 宁芜盆地热液脉型金铜矿床地质特征——以江苏铜井金铜矿床为例[J]. 地质与资源, 2015, 24(2): 117-123.
GAO Li-kun, ZOU Zhi-hong, LI Shu-chun, CAI Wei-dong, SUN Xi-hua, QIAN Ling-yu, ZHANG Long-sheng. GEOLOGICAL CHARACTERISTICS OF THE HYDROTHERMAL VEIN TYPE GOLDCOPPER DEPOSITS IN NINGWU BASIN:A Case Study of Tongjing Gold-Copper Deposit in Jiangsu Province. GEOLOGY AND RESOURCES, 2015, 24(2): 117-123.
2015, Vol. 24 
辽公网安备 21010502000112号