文章摘要
李杰,杨鸿鹏,田永革,邱炜,王国良.青海天重峡金矿地球化学特征及矿床成因[J].矿产勘查,2017,8(5):826-831
青海天重峡金矿地球化学特征及矿床成因
Geochemical characteristics and genesis of the Tianchongxia gold deposit, Qinghai
投稿时间:2016-12-18  
DOI:
中文关键词: 地球化学  矿床成因  天重峡金矿  拉脊山  青海
英文关键词: geochemistry, deposit genesis, Tianchongxia gold deposit, Laji mountain, Qinghai
基金项目:
作者单位
李杰 青海省青藏高原北部地质过程与矿产资源重点实验室, 西宁 810012;青海省地质调查院, 西宁 810012;青海省地质矿产研究所,西宁 810012 
杨鸿鹏 青海省地质调查院, 西宁 810012 
田永革 青海省地质调查院, 西宁 810012 
邱炜 青海省青藏高原北部地质过程与矿产资源重点实验室, 西宁 810012;青海省地质调查院, 西宁 810012;青海省地质矿产研究所,西宁 810012 
王国良 青海省地质调查院, 西宁 810012 
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中文摘要:
      在详细分析拉脊山地区天重峡金矿床成矿背景、矿床地质特征的基础上,对赋矿玄武岩进行了研究。岩石地球化学特征表明为低钾钙碱性岩石,稀土元素Eu具弱负异常特征,微量元素中Ba、Sr、Th、 Ta、Ti相对贫化,Rb、K、Ce、Hf则相对富集。硫化物δ34S变化范围为4.49‰~5.8‰,均值为5.14‰,显示深源硫的特征。综合研究认为,天重峡金矿床为与岩浆期后热液作用有关的构造蚀变岩型金矿床。
英文摘要:
      On the basis of detailed analysis of metallogenic setting and ore deposit features in the Tianchongxia gold deposit located in Laji mountain, the ore-bearing basalt was studied. The lithogeochemical characteristics show that the basalt is low potassic calcic alkali rock; The REE has characteristics of weak negative Eu anomaly. The trace elements of Ba, Sr, Th, Ta and Ti in the basalt are depleted but Rb, K, Ce and Hf are relatively enriched. The δ34S value of sulfide ranges from 4.49‰ to 5.8‰ with a mean of 5.14‰, which indicated that there is a typical deep source sulfur. Comprehensive study result shows that Tianchongxia gold deposit is a tectonic altered rock type gold deposit related to post-magmatic hydrothermal.
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