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1·If that type of mineral is missing from all of the zircons in a particular sample, he notes, that's a clue that the inclusions may have been chemically altered.

如果在某一次取样中，所有的锆石里都不含这种矿物，那就是在提示包体的化学成分可能已经发生了改变。

2·Mineral alteration data are extracted and spatial distribution features of altered rocks are acquired by remote sensing information extraction ways.

通过遥感数据提取矿化蚀变信息，获取蚀变岩的空间分布特征，一直是遥感找矿工作的重要研究内容。

3·The GIS evaluation model may be used to process altered rock information interpreted by ASTER, which may produce accurate remote sensing anomalies and guide mineral exploration.

利用GIS评价模型处理ASTER遥感解译的蚀变岩石信息，可以得到精确的遥感异常，从而指导找矿勘查工作。