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本文在略述洪古勒楞超镁铁岩及铬铁矿基本特征的基础上,选取了四个岩体六个矿体(群)矿石中二十二个有代表性的金云母包裹体探针分析,研究结果表明铬铁矿石中的金云母包裹体是原生包裹体,是一种高Mg/(Mg+Fe)比,高铬,具少许Mg、Fe置换和明显契尔马克替换,以及碱金属K、Na相互取代的金云母质云母。估计其形成温度在1000℃±,压力在10千巴以下。它对铬铁矿形成中挥发分和碱质研究有重要意义,在超镁铁岩和铬铁矿成因研究中,可能是一个潜在的温度-压力指示矿物。
Based on the basic features of Honggulleng ultramafic rocks and chromites, this paper selected twenty-two representative phlogopite inclusions from six ore bodies of four rock masses The results show that the phlogopite inclusions in chromite ore are primary inclusions and are characterized by high Mg / (Mg + Fe) ratio, high Cr, with a little substitution of Mg and Fe, And alkali metal K, Na mutually substituted phlogopite mica. It is estimated that its formation temperature is 1000 ℃ ±, the pressure is below 10kbar. It is of great significance to the study of volatiles and alkalis in the formation of chromite. It may be a potential indicator of temperature and pressure in the genesis of ultramafic and chromite.