The authors analyzed and interpreted again all the age data in the Group using some new dating methods. The integrated analysis indicates the 'following: ( 1) the lower limit of the ages of the meta-acid volcanic rocks should be older than 1900 Ma; 作者通过对武当群的所有年龄测定数据重新作了综合分析之后认为:1.变酸性火山岩的下限年龄大于1900Ma;
In addition, the evolutional process of minerogenic hydrothermal system from the meta-acid reducing environment to the weak-acid oxidizing environment is described. 此外,还概述了地开石粘土的成矿热液体系从酸性偏还原环境到微酸性氧化环境的演化过程。
Tomato quality under the two planting way was different, tomatoes in greenhouse cultivation is meta-acid while tomatoes in greenhouse cultivation were more sweet. 4. 两种栽培方式下的番茄品质有一定差异,大棚番茄果实酸味偏多,而露地番茄果实相对较甜。