孟茹,刘云华,庄晓,刘淑文,刘方杰,邓楠,范媛媛.新疆土根曼苏砂岩型铜矿矿物组合及富集规律[J].西北地质,2020,53(4):108-119 MENG Ru,LIU Yunhua,ZHUANG Xiao,LIU Shuwen,LIU Fangjie,DENG Nan,FAN Yuanyuan.On the Regularity of the Mineral Combination and Enrichment in Tugen Mansu Sandstone-Type Copper Deposit, Xinjiang[J].Northwestern Geology,2020,53(4):108-119
新疆土根曼苏砂岩型铜矿矿物组合及富集规律
On the Regularity of the Mineral Combination and Enrichment in Tugen Mansu Sandstone-Type Copper Deposit, Xinjiang
投稿时间:2019-11-08  修订日期:2020-06-12
DOI:10.19751/j.cnki.61-1149/p.2020.04.010
中文关键词:  砂岩型铜矿;矿物组合;次生铜矿富集;土根曼苏;新疆
英文关键词:sandstone-type copper deposit;mineral combination;secondary enrichment of copper ore;Tugen Mansu;Xinjiang
基金项目:中国地质调查局整装勘查项目“新疆西天山那拉提山一带铜金矿整装勘查区关键基础地质研究”(12120114007401)
作者单位E-mail
孟茹 长安大学地球科学与资源学院, 陕西 西安 710054  
刘云华 长安大学地球科学与资源学院, 陕西 西安 710054
国土资源部岩浆作用成矿与找矿重点实验室, 陕西 西安 710054 
280056933@qq.com 
庄晓 长安大学地球科学与资源学院, 陕西 西安 710054  
刘淑文 长安大学地球科学与资源学院, 陕西 西安 710054  
刘方杰 陕西有色集团公司, 陕西 西安 710054  
邓楠 长安大学地球科学与资源学院, 陕西 西安 710054  
范媛媛 长安大学地球科学与资源学院, 陕西 西安 710054  
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中文摘要:
      新疆土根曼苏铜矿床赋存于早石炭世库山河群上组岩层中,矿体呈层状、似层状产出,受地层、构造的控制。笔者主要利用岩矿鉴定、电子探针、扫描电镜等分析方法查明了本区金属矿物从早到晚主要为黄铁矿、黄铜矿、斑铜矿、辉铜矿、铜蓝、自然铜、黑铜矿、孔雀石等,且相互交代关系明显。同时,根据该区矿物共生组合及其在垂向上空间分布的差异,大致可将矿床分为氧化带、次生硫化物带和原生硫化物带,其中氧化带以孔雀石为标志性矿物,次生硫化物带以辉铜矿、斑铜矿、铜蓝、蓝铜矿为主,原生硫化物带则主要以黄铁矿、黄铜矿为主。研究发现,矿体主要赋存在次生硫化物带中,古陆的风化剥蚀为矿床提供了基本的成矿物质,库山河群上组的巨厚石膏层被认为是S2-的主要来源,盆地为矿体形成提供了良好的赋存条件。在后期构造应力作用下,含矿地层不断地被挤压抬升至潜水面以上,在表生氧化、淋滤等作用下使铜硫化物不断发生叠加交代,从而使铜元素不断富集,形成了铜矿体。
英文摘要:
      Tugen Mansu copper deposit in Xinjiang occurred in the upper group of the Early Carboniferous Kushanhe Group. The ore body is layered, controlled by stratum and structure in this area. Using a series of analytical methods of rock ore appraisal, electron probe and scanning electron microscope, the authors found that the main metallic minerals are pyrite, chalcopyrite, porphyry, pyroxene, copperite, copper blue, natural copper, black copper and malachite. There is an obvious mutual accountability between them. According to the mineral symbiosis combination and its spatial distribution in the vertical direction, the deposit can be roughly divided into oxidation zone, secondary sulfide zone and primary sulfide zone, in which the oxidized zone is symbolized as malachite. The secondary sulfide zone is mainly composed of chalcopyrite, porphyrite, copper blue and azurite. Raw sulfide zone mainly consists of pyrite and chalcopyrite. Ore body is mainly distributed in the secondary sulfide zone. Weathering and erosion of the ancient land provided the basic ore-forming materials for the deposit. The huge gypsum layer existing in the upper group of the Kushan River Group is considered to be the main source of S2- and the basin provides a favourable condition for the formation of the ore body. Ore layers were continuously squeezed above the diving surface under the effect of tectonic stress. Copper sulfide was superimposed under the surface oxidation and leaching and the copper element was enriched, thus forming a copper ore body.
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