Isotopic data proved that the forming age of the sertengshan group is neoarchean 頂部與中新元古界白云鄂博群、渣爾泰山群不整合接觸。
Oil and gas reservoir characteristic analysis of the middle and first proterozoic group in liaoxi geotectogene 遼西拗陷中上元古界油氣儲集性能分析
The middle proterozoic granitoids was an intraplate type producted in transitinal crystalline basement before plate collision 中元古界的花崗巖類是板塊碰撞前過渡性結晶基底上局部熔融花崗巖類。
Characteristic of lithofacies paleogeography and sedimentary environment of the middle proterozoic wufushan group in jishan area , henan provin - ce , china 河南箕山地區中元古界五佛山群沉積環境及巖相古地理特征
The thickness of yangzhuang formation is small compared with the whole proterozoic section , but it has multiple types of rocks with special origins 楊莊組在整個中、新元古界剖面中厚度不大,但其巖石類型多樣且成因特殊。
The kunyang group is distributed in the marrow and long belt constrained by the luzhijiang lithospheric fault and the xiaojiang - yimeng fault 早中元古界昆陽群分布于綠汁江巖石圈斷裂和小江-易門斷裂的夾持地帶,呈狹長狀展布。
The main diagenetic stage and relevant rock types are the middle proterozoic assemblage of gneissoid granodiorite - adamellite and the sinean schistosity diorates 主要成巖期及代表性巖類有:中元古界為片麻狀花崗閃長巖二長花崗巖,震旦紀為片理化閃長巖。
The meso - and neoproterozoic section of jixian in tianjin , china is highly worthy of integrated re - search , in which the yangzhuang formation takes the role of linking the old and new strata 摘要天津薊縣中、新元古界剖面具有極高的綜合研究價值,而楊莊組在該剖面中居于承上啟下的位置。
The mesoproterozoic wumishan formation in jixian , tianjin represents a succession of 300 - m thick carbonate strata , in which stromatolite biostromes and clotted bioherms are best developed 天津薊縣中元古界霧迷山組為一套厚3000余米的碳酸鹽巖地層,疊層石生物層和凝塊石生物丘特別發育。
The main stratums contain gold element are yanlinggou team of qinling group and huoshengmiao team of erlangping group in sub - paleozoic , the lithologise that are the best related with gold mineralization are graphite marble and dolomite marble in yanlinggou team and splite marble in huoshenmiao team 主要賦礦地層中元古界秦嶺群雁嶺溝組及下古生界二郎坪群火神廟組,與金礦化關系最為密切的巖性分別為雁嶺溝組石墨大理巖、白云石大理巖及火神廟組細碧巖等。