文章摘要
董少峰,王居里,胡洋,王建其,郑国平,杨猛,王敏,令伟伟.西准噶尔苏云河钼矿Ⅱ号岩体地球化学、年代学及成矿意义[J].矿产勘查,2016,7(6):891-903
西准噶尔苏云河钼矿Ⅱ号岩体地球化学、年代学及成矿意义
Geochemistry, geochronology and metallogenic significance of No. 2 granitic intrusion in Suyunhe porphyry molybdenum deposit, western Junggar
投稿时间：2016-02-20  
DOI：
中文关键词: 斑岩型(铜)钼矿床  构造背景  岩浆源区  成矿元素组合  西准噶尔
英文关键词: porphyry copper-molybdenum deposit, tectonic setting, sources of magma, ore-forming elements combination, western Junggar
基金项目:“十二五”国家科技支撑计划项目(编号:2011BAB06B01-03)资助。
作者单位
董少峰 大陆动力学国家重点实验室,西北大学地质学系,西安 710069 
王居里 大陆动力学国家重点实验室,西北大学地质学系,西安 710069 
胡洋 大陆动力学国家重点实验室,西北大学地质学系,西安 710069 
王建其 大陆动力学国家重点实验室,西北大学地质学系,西安 710069 
郑国平 新疆维吾尔自治区地质矿产勘查开发局第一区域地质调查大队,乌鲁木齐 830000 
杨猛 大陆动力学国家重点实验室,西北大学地质学系,西安 710069
西北有色地质勘查局,西安 710054 
王敏 大陆动力学国家重点实验室,西北大学地质学系,西安 710069 
令伟伟 大陆动力学国家重点实验室,西北大学地质学系,西安 710069 
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中文摘要:
      苏云河钼矿位于西准噶尔西部,巴尔鲁克山西段,是近年发现的大型斑岩型钼矿。矿区Ⅱ号岩体主要为灰—灰白色二长花岗斑岩及斑状二长花岗岩,发育较强钼铜矿化。岩体高硅,中等富碱,A/CNK=0.98~1.06,σ=1.39~2.18,为高钾钙碱性系列弱过铝质花岗岩,经过了较强烈的分异演化；稀土总量较低,轻重稀土分馏弱,Eu负异常较明显,相对富集Rb、Th、U、K等,亏损Ba、Sr、P、Ti等。岩体应源于新元古代新生基性下地壳的部分熔融,形成于晚石炭世俯冲相关的岛弧环境。结合前人研究,认为Ⅱ号岩体和Ⅰ号岩体源区相同(似),分离结晶作用导致其发育不同的成矿元素组合；Ⅱ号岩体的形成演化为区内斑岩型钼、铜矿化提供了重要条件。
英文摘要:
      The Suyunhe molybdenite deposit located in the western part of Barluk mountain of western Junggar, is a large-sized porphyry deposit discovered in recent years. The strong copper-molybdenum mineralization is relatively associated with No.2 granitic pluton in the deposit area and the plutonic intrusions are predominantly monzonitic granite porphyry and porphyritic monzonitic granite. The intrusive rocks are characterized by high SiO2, rich alkali content accompanied with a range of A/CNK ratio from 0.98 to 1.06 and the range of σvalue from 1.39 to 2.18, which indicates that the pluton belongs to the high potassium calc alkaline and weakly peraluminous granite series and experienced a strong differentiation and evolution process. The REE concentrations are low, and there is unobvious differentiation between LREE and HREE with obvious Eu negative anomaly. The rocks are relatively enriched in elements such as Rb, Th, U and K etc., and depleted in elements of Ba, Sr, P and Ti etc.. The magma mainly originated from partial melting of Neo-proterozoic newborn mafic lower crust, formed in the Late Carboniferous continental margin arc environment. In combination of previous study, it is thought that No.1 granitic intrusion, and No. 2 granitic intrusion has similar original source. The fractional crystallization of magma led dissimilar mineralization. Formation and evolution of the No.2 granitic intrusion provided important conditions for porphyry copper and molybdenum mineralization in the region.
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