| 中国东北钼矿床地质 |
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| 引用本文： | 陈衍景,张成,李诺,杨永飞,邓轲.中国东北钼矿床地质[J].吉林大学学报(地球科学版),2012(5):1223-1268. |
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| 作者姓名： | 陈衍景 张成 李诺 杨永飞 邓轲 |
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| 作者单位： | 北京大学造山带与地壳演化重点实验室 |
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| 基金项目： | 国家“973”计划项目(2006CB403500;2012CB416602);国土资源大调查项目(1212011120685) |
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| 摘 要： | 中国东北地区是中亚造山带和环太平洋构造带叠加的区域,成矿作用复杂而强烈。系统总结了东北地区的钼矿床勘查和研究进展,形成如下主要认识:1)研究区已发现3个超大型、18个大型等70余处钼矿床,探明资源量仅次于东秦岭钼矿带;2)矿床成因类型主要为斑岩型(含爆破角砾岩型)、矽卡岩型,次为热液脉型;3)成矿岩浆岩多为高硅富钾钙碱性的I型花岗岩,岩浆活动具有多期多阶段性;4)钼矿床集中分布在华北克拉通北缘、南大兴安岭、北大兴安岭和吉黑褶皱带等4个地区;5)与岩浆活动的多期多阶段性相一致,钼矿化具有多期多阶段性,但中生代最为重要,并集中在250～210、190～160和150～110 Ma等3个高峰期;6)钼矿床的辉钼矿Re含量变化较大,总体较低,显示成矿物质来源复杂,但以壳源为主;7)成矿时代越老,辉钼矿Re含量越高,Cu/Mo储量比越大;8)钼矿床主要形成于增生造山和大陆碰撞造山(含后碰撞)两种构造背景,单钼矿床始现于三叠纪,只形成于大陆碰撞造山体制。
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| 关 键 词： | 中国东北 钼矿床 成矿时间 矿床地质 构造背景 |
Geology of the Mo Deposits in Northeast China |
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| Chen Yan-jing,Zhang Cheng,Li Nuo,Yang Yong-fei,Deng Ke.Geology of the Mo Deposits in Northeast China[J].Journal of Jilin Unviersity:Earth Science Edition,2012(5):1223-1268. |
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| Authors: | Chen Yan-jing Zhang Cheng Li Nuo Yang Yong-fei Deng Ke |
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| Institution: | Key Laboratory of Orogen and Crust Evolution,Peking University,Beijing 100871,China |
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| Abstract: | The Northeast(NE) China is located in the combining area of the Central Asian orogenic belt and the circum-pacific orogenic belt,accommodating intensive and complicated mineralizations.The authors summarizes the progresses in exploration and geological research of the Mo deposits in the area,and draws out several conclusions as below: 1)More than seventy Mo deposits have been discovered in NE China,including three world-class giant and eighteen large deposits,with total resource being next to the eastern Qinling Mo belt;2)The main genetic types are Mo-bearing porphyry(including explosive breccia pipe) and skarn,and minor of hydrothermal vein;3)The Mo-associated intrusions are generally Si-and K-enriched calc-alkaline I-type granites,and have been formed by multi-episodic and multistage magmatism;4)The Mo deposits are concentrated in regions: the northern margin of North China craton,the southern Great Hinggan Range,the northern Great Hinggan Range and the Ji-Hei fold belt;5)The Mo deposits were formed in multi-episodic and multistage events coinciding magmatic activities,but the majority were formed in Mesozoic,with three peak-mineralization pulses at 250-210,190-160 and 150-110 Ma,respectively;6)The Re contents in molybdenites from the Mo deposits are widely variable and generaly low,indicating that the metal sources vary from mantle to crust,but mainly from continental crust;7)The Re contents in molybdenites and the reserve ratio of Cu/Mo increase along with the metallogenic time of the deposits;8)The Mo deposits in NE China were formed in subduction-related accretionary orogenesis and continental collision orogenesis(including post-collisional tevtonism),but the Mo-only deposits began to appear in Triassic,i.e.only in continental collision setting(including post-collision). |
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| Keywords: | Northeast China molybdenum deposits metallogenic time ore geology tectonic setting |
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