常見例句Danfeng Group(DFG) metabasalts can be divided into two types: one is LREE-enriched cafe-alkaline basalts, the other is LREE-depleted tholeiitic basalts. 丹鳳祥變質(zhì)玄武巖可以分為兩類:一類是LREE富集型的鈣堿性玄武巖,另一類是LREE平坦型的拉斑玄武巖。The geochemical characteristics of the metabasalt agree with those of continental rift type volcanic rocks, forming a tectonic environment of the active shelf rift basin. 變質(zhì)玄武巖的地球化學(xué)特征與大陸裂谷型火山巖一致,形成于活動陸棚裂陷(谷)盆地的構(gòu)造環(huán)境。Trace Element and Isotopic Geochemistry of Metabasalts from Dafeng Group (DFG) in Shangxian-Danfeng Area, Shaanxi Province 陜西商縣-丹鳳地區(qū)丹鳳群變質(zhì)玄武巖的微量元素和同位素地球化學(xué)SO, the sources of DFG metabasalts could include following units on the basis of trace element and isotopic geochemical data: 1 ) Depleted asthenosphere mantle; 因此,根據(jù)微量元素和同位素地球化學(xué)資料,丹鳳群變質(zhì)玄武巖的源區(qū)可能包括下述組分:1)虧損的軟流圈地幔(DM);metabasalt 變玄武巖 返回 metabasalts