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一、某地地质特征简介南岭某地区位于一个燕山花岗岩岩基的东北部,该区花岗岩体同位素年龄测定为140百万年到165百万年之间,花岗岩浆是燕山三期(将燕山期划分为5期)多次侵入的,普遍有稀土矿化。花岗岩风化后形成两种花岗岩风化壳稀土矿床,一为离子吸附型风化壳矿床,用食盐水等电解质溶液浸泡稀土花岗岩的风化产物,则可有80-90%以上的稀土元素被浸泡出来,可较经济地提取各种稀土氧化物,这种矿床储量大,开采选冶均方便;另一种类型为富含磷钇矿、独居石的花岗岩风化壳矿床。这两种不同类型的稀土矿床分布于某地数百平方公
I. Geological Features of Somewhere Introduction Nanling is located in the northeastern part of a Yanshan granite basement. The isotopic ages of the granite bodies in this area are between 140 million and 165 million years. Granite magma is the third phase of Yanshan Period is divided into 5) many invasion, generally have rare earth mineralization. After granite weathering, two kinds of granite weathering crust rare earth deposits are formed. One is an ion-adsorption weathering crust deposit. When weathered the weathering products of rare-earth granite with a solution of saline and other electrolytes, 80-90% of rare earth elements may be soaked out More economical extraction of rare earth oxides, the deposit reserves, mining and smelting are convenient; the other type is rich in xenotime, monazite granite weathering crust deposits. The two different types of rare earth deposits are located in a few hundred square kilometers