摘要
铬铁矿自然重砂及其组合对超基性岩型铬铁矿床具有良好的响应,而青藏高原有多条蛇绿岩带,其中发育有大量超基性岩体,自然重砂及其矿物组合是否能够反映其铬铁矿的成矿信息是一个值得研究的问题。针对区域已有资料,对西藏丁青一带铬铁矿自然重砂异常特征、分布规律及与相关矿床点的响应程度进行归纳分析,探寻其中蕴含的成矿作用信息。已有研究表明,超基性岩型铬铁矿的自然重砂标志矿物组合为铬铁矿+铬尖晶石。西藏丁青一带铬铁矿自然重砂异常主要集中分布在结合带及其两边,与结合带超基性岩具有密切依存关系,其高值点与铬铁矿床(点)响应程度较高。这些特征及规律对于今后铬铁矿找矿工作具有重要指示意义。
Chromite heavy minerals and their combination have a good response to ultrabasic chromite deposits. There are many ophiolite belts holding ultrabasic rocks in the Tibetan plateau. It is worthwhile studying the indication of heavy minerals and their combination to chromite mineralization. This paper describes the anomaly distribution of chromite and its related mineral placers, summarizes their response extent to chromite mineralization around Dingqing of Tibet based on existing data, which would provide prospecting information to find the deposit. Research proves that the natural heavy placer combinations of uhrabasic chromite deposits are chromite and chromium spinel. Based on the heavy minerals survey, their anomalies in Dingqing area mainly distribute around the suture zone, closely related with ultrabasic rocks in genesis. Chromite high anomalies are highly response to chromite deposits （occurrences）. These characteristics may provide indication for prospecting chromite ore deposits.
出处
《资源与产业》
2015年第2期78-83,共6页
Resources & Industries
关键词
铬铁矿
超基性岩
西藏丁青
自然重砂
响应程度
chromite
uhrabasic rocks
Dingqing of Tibet
heavy minerals
response extent
