广西大厂100~#矿床地球化学异常特征、分带模型与找矿预测标志

大厂锡矿是一个成矿物质多来源、控矿因素多样化和矿床类型多种类的超大型锡多金属矿床。其中No.100矿体赋存于龙头山生物礁灰岩中。对其成矿过程中各类组分的分配特征和规律、各类微量元素和烃类组分异常的展布特征、元素比值变化特征、异常综合分带模型、找矿预测标志等进行了总结。微量元素及烃类组分在不同标高（中段）的变化规律显示：No.100矿体虽然在空间上为连续的整体，但其为多期成矿作用或同一期多次矿化作用（脉动作用）相互叠加的结果。多次成矿作用叠加和各元素本身地球化学性质、行为的差异，导致了不同元素在空间上富集区段的差畀，并产生多个异常浓集中心。

The characteristics,zoning pattern of geochemical anomalies and predicting indications for exploration in 100^4 deposit,Dachang tin mine,Guangxi, China

Dachang Tin deposit is a super-large-scale nonferrous metal deposit which is characteristic by multi-resources of mineralizing matter, complicated controlling factors of ore forming and various types of ore body. The 100^# ore body is hosted in Longtoushan carbonate reef. The distributing characteristic and law of every component during the process of mineralizing, the anomaly extend characteristics of different kinds of trace elements and hydrocarbons, the variety of element ratios, the synthetic anomaly zoning pattern and prospecting indicators that related to the deposit have been summarized in the paper. The varieties of the microelement＇s and the hydrocarbon＇s content in different levels of laneway show that the No.100 ore body in this area is continuous,but it was mineralized by multi-period or multi-stage of one period. The multi-mineralizing period or stage and the differences of geochemical quality and behavior of elements result in the difference of their anomaly concentrated place, and form several higher value centers of anomaly.