内蒙古五岔沟地区洮儿河流域重矿物特征分析

五岔沟洮儿河流域重矿物的分布在不同区域表现有明显差异性: 洮儿河主流和二道桥所在支流主要重矿物为橄榄石，查干郭勒河主要重矿物为褐铁矿，额木斯台沟主要以磁铁矿为主，胡斯台沟主要以绿帘石为主。不同矿物组合和分布特征反映出该流域重矿物成熟度低，受近源物质影响显著。根据河流矿物组合，主要划分为3 个矿物区，即洮儿河主流矿物区、洮儿河东部矿物区、洮儿河西部矿物区，其中洮儿河东部矿物区金属矿物含量异常，对于寻找有用矿产提供了一定的科学依据。

Analysis of the characteristics of heavy minerals in Taoer River area, Wuchagou region in Inner Mongolia

The study of heavy minerals of Taoer River area in Wuchagou region shows that the heavy minerals distributing in different areas are various for each other． Main heavy minerals in Taoer River mainstream and tributaries of the Erdaoqiao are olivine，while the main heavy minerals are limonite in Chagan River，magnetites in Emusitai ditch，and epidote in Husitai Groove． Different mineral assemblages and their distribution characteristics reflect that the heavy minerals in the area is low in maturity，which is obviously affected by near-source material． According to the different mineral assemblages，three mineral zones and divided，including the Taoer River mainstream mineral zone，eastern-，and western mineral zones of Taoer River area． Among these zones，metallic minerals are abnormally high in the eastern mineral zone，which provides certain scientific basis for finding useful minerals．