论文部分内容阅读
西天山伊什基里克一带早石炭世大哈拉军山组为岛弧环境的钙碱性钠质火山岩,Au-Cu异常与该火山岩的空间分布有较好的套合性,区内的金、铜矿点和矿化点也全部赋存其中,因而显示良好的金-铜成矿条件,其中与俯冲构造有关的浅成低温热液型金矿为最主要类型.同一时代的库勒萨依斑岩为钙碱性系列岛弧浅成岩,SiO2含量57.06%～70.74%,高Al2O3、Na2O、Sr和相对富集LREE,低MgO、Y、Yb和强烈亏损HREE;Na2O/K2O>1,Sr/Y平均57.67,正Eu异常,因而具有典型O型埃达克岩特征.库勒萨依斑岩与Mo异常套合好,已发现钼矿床,找矿前景良好.库勒萨依斑岩与大哈拉军山组火山岩共同构成了早石炭世岛弧火成岩组合,丰富了本区的构造岩石组合类型,对恢复西天山大地构造演化有重要意义,也为深化西天山区域成矿规律的研究,指导寻找与岛弧火成岩有关的金-铜矿和与埃达克岩有关的铜-钼矿提供了理论依据.
The calc-alkaline sodium volcanic rocks of the Early Carboniferous Dahalajunshan Formation in the area of Ishikilike in the western Tianshan Mountains have a good combination of Au-Cu anomaly with the spatial distribution of the volcanic rocks. Gold, copper and mineralization sites are also all deposited, which shows good gold-copper metallogenic conditions, of which the subduction tectonic epithermal gold deposits are the most important type.Cool of the same era The Soyorphic porphyry is a calc-alkaline series of argillaceous diagenetic rocks with SiO2 content of 57.06% -70.74%, high Al2O3, Na2O, Sr and relatively enriched LREE, low MgO, Y, Yb and strongly depleted HREE; Na2O / K2O> 1 , With Sr / Y an average of 57.67 and positive Eu anomalies, so it has the typical characteristics of O-adakite.Kuoleisha porphyry and Mo anomalies are good, and the molybdenum deposit and prospecting prospect have been found to be good. The rocks and the Dahalajunshan Formation volcanics together constitute the Early Carboniferous arc igneous assemblages, enriching the tectonic rock assemblages in this area, and are of great significance for the restoration of the tectonic evolution of the western Tianshan Mountains, and also for deepening the metallogenic regularity in the western Tianshan Mountains Research to guide the search for gold-copper deposits associated with island arc igneous rocks and copper-molybdenum deposits associated with adakites Theoretical basis.