投稿时间：2017-11-01
修订日期：2018-03-05
网络发布日期：2018-11-03
中文摘要:Don Javier斑岩铜钼矿床位于南美安第斯成矿带中段，秘鲁中南部-智利北部巨型斑岩铜钼金多金属成矿带上，矿区主要出露Yarabamba超群花岗闪长岩岩基和英安斑岩岩体，矿体呈筒状，主要赋存在英安斑岩体及其围岩中，受NW向断裂构造控制。在野外地质调查的基础上，文章对矿床流体包裹体特征进行研究，并结合矿体产出形态特征，对成矿流体来源及演化进行探讨。对黄铁矿-石英和黄铜矿（辉钼矿）-石英2个成矿阶段的石英流体包裹体研究结果表明，成矿阶段矿石中发育富气相-液相、气液两相及含NaCl子矿物三相3种类型的原生流体包裹体，流体包裹体均一温度为287~499℃，含NaCl子矿物包裹体的盐度w（NaCleq）为30%~42%，密度为1.08~1.21 g/cm3，成矿流体属于中高温、高盐度的NaCl-H2O体系，为岩浆热液来源的成矿流体。流体包裹体特征还表明，流体的沸腾作用是引起成矿流体中矿质发生沉淀富集的重要成矿机制。
Abstract:The Don Javier porphyry Cu-Mo deposit is located in a large porphyry copper molybdenum gold polymetallic metallogenic belt in the south central part of Peru and northern Chile, the middle part of the Andean metallogenic belt. The mining area mainly has exposures of Yarabamba supergroup granodiorite batholith and dacite porphyry. The orebody mainly exists in dacite porphyry and its surrounding rocks in the shape of tube, and it is controlled by the NW-trending fault structure. Based on field geological survey, the authors studied the characteristics of the fluid inclusions in the deposit, and investigated the source and evolution of the ore-forming fluids in combination with the morphological characteristics of the orebodies. The pyrite and chalcopyrite (molybdenite) fluid inclusions of two stages formed four types of primary fluids containing three phases of inclusions, i.e., rich gas phase, rich liquid phase, halite-bearing three phuse fluld in clusions developed at the main ore-forming stage. The homogenization temperature of fluid inclusions is 287~499℃, the salinity w(NaCleq) is 30%~42% and the density is 1.08~1.21 g/cm3. the ore-forming fluid belongs to the NaCl-H2O system of medium and high temperature and high salinity, with mineralization fluid belonging to magma hydrothermal source. The characteristics of fluid inclusions also indicate that the boiling of fluids seems to have been an important mineralization mechanism for the precipitation and enrichment of minerals in ore-forming fluids.
keywords:geochemistry fluid inclusion ore-forming fluid Don Javier porphyry Cu-Mo deposit Andean metallogenic belt Peru
文章编号：
中图分类号：P618.42
文献标志码：
基金项目:本文得到中国地质调查局地质调查项目《“一带一路”矿产资源信息采集与综合研究》（编号：121201004000150009）、《全球重要成矿带成果集成与综合研究》（编号：1212011220912）、《海上丝绸之路重点地区有色金属资源潜力评价》（编号：DD20160118）和国家国际科技合作专项（编号2011DFA22460）联合资助
引用文本：
赵宏军,王可勇,邱瑞照,陈秀法,卢民杰,王军,杨日红.2018.秘鲁Don Javier斑岩铜钼矿床流体包裹体特征[J].矿床地质,37(5):1065~1078ZHAO HongJun,WANG KeYong,QIU RuiZhao,CHEN XiuFa,LU MinJie,WANG Jun,YANG RiHong.2018.Characteristics of fluid inclusions in Don Javier porphyry copper-molybdenum deposit, Peru[J].Mineral Deposits37(5):1065~1078
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