镁铬铁矿
- 网络magnesiochromite
镁铬铁矿-
基质呈辉长结构，主要矿物为辉石和斜长石，其次有橄榄石、石英、白磷钙矿、磷镁钙矿、铬铁矿和堇青石。
Silicates in the matrix are mainly composed of pyroxene and plagioclase with minor olivine , chromite , silica , cordierite , merrillite , and stanfieldite .
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岩体成因类型为蛇绿岩组合中的超镁铁质单元，铬铁矿的富集部位是地幔橄榄岩和堆积杂岩带底部的纯橄榄岩。
On the basis of the genetic type , the ultramafic bodies are part of ultramafic unit of ophiolite and the positions where the chromite enriched are mantle peridotite or bottom dunite of cumulate complex zone .