胶东玲珑金矿田煌斑岩脉与成矿关系的讨论  

Discussion on relationship between lamprophyre veins and mineralization in the Linglong gold field, eastern Shandong

作　　者：罗镇宽[1] 关康[1] 苗来成[2] 

机构地区：[1]天津地质研究院,天津300061 [2]中国科学院地质与地球物理研究所,北京100029

出　　处：《黄金地质》2001年第4期15-21,共7页Gold Geology

摘　　要：在世界范围内的前寒武纪地盾区 ,煌斑岩与中温热液金矿床有着密切的空间和时间关系 ,但是否存在成因关系有不同认识。以玲珑金矿田为例 ,介绍了区内煌斑岩的地质地球化学特征及其与金矿床在时间和空间上的密切关系。与含金石英脉伴生的橄榄拉辉煌斑岩富含大离子亲石元素 (LILE)、H2 O、CO2 、Au和碱金属 ,这些都是成矿流体富集的成分 ;煌斑岩形成年龄覆盖了金矿化的年龄 ,是与成矿作用时间最接近的岩浆活动 ,两者又都是通过相同的构造通道运移。以上特征表明 ,煌斑岩即使不是Au的提供者 ,也可以为金矿化提供部分成矿流体和热动力 ,从这个意义上讲 。There are close spatial and temporal relation between lamprophyres and mesothermal gold deposits in the world wide Precambrain shield areas, but wheather existing genetic relation between them is in different opinons.This article takes an example of the Linglong gold field to explain the geo geochemical features of lamprophyre and its relation with gold deposits in space and time.Odinites associated with gold bearing quartz vein are enriched with large ionic lithophile element(LILE),H 2O,CO 2,Au and alkali metals,which are all the enriched composition by ore forming fluid.The formation age of lamprophyres overlays the age of gold mineralization,so the formation of lamprophyres is the nearest magmatic activity to the minerlization time.Both of them take the same tectonic channal through which the lamprophyric magmas and ore forming fluids migrate.The statement above indicate that even if lamprophre is not the supplier of gold,it still will supply some ore forming fluids and ore forming heat power for the gold mineralization.In this respect,we can say that it exists genetic relation between gold mineralization and lamprophyres.

关 键 词：金矿床 煌斑岩 成因关系 成矿作用 岩浆活动 金矿化 

分 类 号：P618.51[天文地球—矿床学]