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重砂找矿法是一种成本低、效果明显的找矿方法。在西藏1∶20万重砂测量中,发现了许多找矿线索及矿(床)点,取得了较好的找矿效果,特别是对铬、钨、锡、铅锌、钼等金属矿产效果极佳。西藏铬铁矿主要产出于南北两个蛇绿混杂岩带的超基性岩中,其自然重砂异常主要成群分布于两个蛇绿岩混杂岩带中,与超基性岩及铬铁矿点分布高度一致。西藏地区含铬铁矿的超基性岩中含有大量的抗风化强、比重大的黑色铬尖晶石等矿物,为稳定的自然重砂矿物,呈带状分布,是一种重要的找矿标志。拟以此作为找矿线索或找矿标志,拓展西藏铬铁矿南带和北带的找矿思路和找矿方向,以期待发现新的超基性岩或铬铁矿资源。
Heavy sand prospecting method is a low cost, effective prospecting methods. In Tibet 1: 200000 heavy sand measurement, many prospecting clues and ore points have been found and good prospecting results have been achieved, especially for metal mineral effects such as chromium, tungsten, tin, lead, zinc and molybdenum Excellent. Tibet chromite is mainly produced in the ultramafic rocks of two ophiolitic mélanges in North and South China. The anomalous natural sand is mainly distributed in two ophiolite mixed zones, Iron ore distribution of the same height. The ultramafic rocks containing chromitized iron in Tibet contain a large amount of minerals such as black chrome spinel with strong anti-weathering and large specific gravity. They are zonal distribution of stable natural heavy sands and are an important prospecting resource Sign. It is proposed to use this as a prospecting trail or ore prospecting symbol to expand the ore prospecting and prospecting directions in the southern and northern Tibetan Chromites in anticipation of discovering new ultrabasic rocks or chromite resources.