英语语法分析

Such low levels of sulfate indicate that the archean atmosphere was virtually devoid of oxygen.

如此低的硫酸盐浓度，表示太古代大气中的氧气极为稀薄。

The nickel mineralization is contained in a layered basic massif surrounded and underlain by an archean gneiss complex.

此处镍矿化产于一层状基性岩块内，其四周和下面都为太古代片麻岩杂岩围绕。

South Longwangmiao gold deposit in Liaoning Province occurred in the meta-felsic rock unit in Liaobei Archean greenstone belt.

辽宁省清原县的南龙王庙金矿，赋存于太古宙绿岩带的变粒岩岩段中。