投稿时间：2015-07-20
修订日期：2015-09-20
网络发布日期：2015-12-31
中文摘要:甲基卡是中国硬岩型锂矿最集中的产地之一,近年来又发现了X03号(新三号脉)超大型矿脉,使得甲基卡矿田锂的储量有可能超过澳大利亚格林布什而位居世界前列。文章通过对甲基卡矿床的地质特征、成矿期次、矿石组构、矿石成分等资料的总结,对其典型矿脉、典型钻孔的系统研究,以及与典型硬岩型锂多金属矿床的对比研究,总结出甲基卡的矿床式特点。甲基卡式矿床以形成于印支晚期-燕山早期、定位于欧亚大陆与印度板块之间的穹窿构造隆起区、围绕成矿母岩发育区域性分带,但单一矿脉的分带性较差、含矿伟晶岩既可以顺层产出也可以近垂直切层产出(类似于"五层楼+地下室")、锂辉石等稀有金属矿物既有伟晶状又有细粒状产出的特点,是中国乃至于世界上最重要的固体锂矿床类型之一,具有极大的找矿潜力,无论是新三号脉本身还是甲基卡外围其他地区都是值得工作的区域。甲基卡矿床式稀有金属矿床的成矿规律可指导热穹隆伟晶岩田的矿产勘查工作,川西地区除了甲基卡矿田之外,也适用于石渠、马尔康、九龙等地的伟晶岩田,同时,对于整个青藏高原的东部及北缘印支运动后期与燕山期之初岩浆_构造_热穹隆发育地区寻找伟晶岩型稀有金属矿床具有参考意义。
Abstract:Being one of the major producers for rare metals in China,the Jiajika Li-polymetal deposit in Sichuan is the most important hardrock-type lithium deposit with more than 500 veins of pegmatite concentrated there.In recent years,with the newly discovery of the X03 and other pegmatite veins,the total resources of lithium in the Jiajika orefield are likely to exceed those of the Greenbushes deposit in Australia.The authors investigated the characteristics of the Jiajika style deposits by summarizing the data of geological features,metallogenic period,ore fabrics and ore composition of the Jiajika deposit,and studied systematically the typical drill holes of the typical ore veins and researched contrastively the typical hardrock-type lithium polymetallic deposits.The Jiajika-style pegmatite rare metal deposits are featured by forming in the late Indosinian-early Yanshanian,being concentrated in the domes in uplift zones between the Eurasia n and Indian plates,well_developed regional zonation around the domes but a poo rly-zoning of single vein,distribution of ore-pegmatite veins parallel to or cutting strata bed near vertically,similar to the "five floors+basement" setting in South China,and spodumene and other rare metal minerals occurring both as fine-grained minerals and as coarse-grained ones.Being one of the most important hardrock-type lithium polymetallic deposits both in China and abroad,the Jiajika-style Li-polymetallic deposit has great prospecting potential.The authors hope that it will have guiding significance for the further mineral exploration t hrough the establishment of the Jiajika deposit-style model and the analysis of metallogenic regularity.
keywords:geology deposit-style Jiajika-style rare metal deposits minerogenetic series metallogenic regularity
文章编号：
中图分类号：P618.71
文献标志码：
基金项目:本文得到中国地质调查局"稀有稀土稀散矿产调查"、"中国离子吸附型稀土战略调查及研究(编号:1212011220804)"、"四川三稀资源综合研究与重点评价(编号:12120112208014)"和"中国矿产地质与区域成矿规律综合研究(中国矿产地质志)项目(编号:1212011220369)"联合资助
引用文本：
刘丽君,付小方,王登红,郝雪峰,袁蔺平,潘蒙.2015.甲基卡式稀有金属矿床的地质特征与成矿规律[J].矿床地质,34(6):1187~1198LIU LiJun,FU XiaoFang,WANG DengHong,HAO XueFeng,YUAN LinPing,PAN Meng.2015.Geological characteristics and metallogeny of Jiajika-style rare metal deposit[J].Mineral Deposits34(6):1187~1198
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