The primary rocks are a series of intermediate-acid volcanics and carbonate formed in environment of rift valley.
2
不过,变质岩中微量碳酸盐的碳含量和碳同位素比值分析能够对原岩类型提供有效的判别。
Nevertheless, the combined carbon content and isotope analyses of micro-carbonate in metamorphic rocks can be used to make a distinction in origin between sedimentary and igneous protoliths.
3
对用原淀粉复合脂肪酸、原淀粉包埋沉淀碳酸钙(PCC)作为纸张表面施胶剂进行了研究。
Surface sizing using raw starch with fatty acid and raw starch coated PCC was studied.