镁铝榴石形成于滇东南晚第三纪岩简状的玄武质次火山角砾岩中，角砾岩成分复杂，其中包含有镁铝榴石和铬透辉石等可作宝石材料利用的角砾和晶屑。
The rubbles and crpetals of prrope and chrome-diopsidewhich can be used as gem materials are found in the breccias whose component is very complex.
测试结果表明，矽卡岩中石榴子石以钙铁榴石-钙铝榴石为主，辉石以透辉石为主，甲玛矿床矽卡岩属于交代矽卡岩中典型的钙矽卡岩。
The results show that garnets in the ore deposit are mainly andradite-grossularite and augites are mainly diopside. The skarns in the Jiama ore deposit belong to typical calcic skarns.
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