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笔者在学习前人资料的基础上,结合自己从事铬矿工作的实践,对铬矿的成矿作用和特征,略有体会,现不揣浅陋,笔之于后,不妥之处,望批评指正。一、超基性岩与铬矿床的成因联系目前世界上所发现的铬矿床,均与超基性岩有关。据地球化学方面的研究,Cr~(3+)与Mg~(2+)离子半径相近(Cr~(3+)为0.63,Mg~(2+)为0.65),二者离子电位均较大,并且都随SiO_2的增多而减少。同时又因Mg~(2+)
On the basis of learning from predecessors’ data and combining with the practice of chrome ore work, the author has a slight understanding of the mineralization and characteristics of chrome ore. . First, the genetic relationship between ultrabasic rocks and chromite deposits The chromium deposits found in the world are all related to ultrabasic rocks. According to the geochemical studies, the ionic radius of Cr 3+ is similar to that of Mg 2+ ions (Cr 3+ is 0.63 and Mg 2+ is 0.65) , And all decrease with the increase of SiO_2. At the same time due to Mg ~ (2+)