Uranium has been redistributed by biological processes as well as in the sedimentary cycle . 由于生物作用,以及沉積旋回,鈾發(fā)生重新分布。
The sanjianfang formation ' s oil reservoir can be divided into 39 substrata on sedimentary cycle and sedimentary rhythmic character of reservoir . and two new fault among the wells is confirmed through the division of substrata and the dynamic test 依據(jù)沉積旋回和韻律將研究區(qū)三間房組地層細(xì)分為39個(gè)小層,通過劃分小層和動(dòng)態(tài)檢驗(yàn)落實(shí)了兩條井間斷層。
Situated at the southeast of the mu us desert , ordos plateau , the milanggouwan stratigraphical section in the salawusu river valley keeps a record of 38 sedimentary cycles of alternate evolution of the aeolian dune layers with the fluvio - lacustrine facies and palaeosols since 150 ka bp 位于鄂爾多斯高原毛烏素沙漠東南邊緣的薩拉烏蘇河流域的米浪溝灣剖面,記錄了150kabp以來的38個(gè)風(fēng)成的砂丘砂與河湖相和古土壤交替演化的沉積旋回。
According to the characteristics of lithology and lithofacies , the principle that lithostratic unit group is related to volcano cycle or sedimentary cycle , jiangnan region can be divided into two groups , wuyi region can be divided into three groups , nanling region can be divided into four groups 根據(jù)巖性巖相特征,結(jié)合巖石地層單位群與火山旋回或沉積旋回相對(duì)應(yīng)的原則,將江南區(qū)劃分為兩個(gè)群,武夷區(qū)劃分為三個(gè)群,南嶺區(qū)劃分為四個(gè)群。
The fluvial , delta , and lacustrine sedimentary system was realized according to the analysis of the fossils , sedimentary structure , sedimentary cycle , rhythmic bedding and other criteria in the yanchang formation . the sedimentary microfacies of the chang - 6 oil - bearing beds was identified through its fine description , and the evolution of palaeogeography was revealed 通過古生物、沉積結(jié)構(gòu)與構(gòu)造、沉積韻律、沉積厚度與沉積旋回特征和測(cè)井相分析等,在延長(zhǎng)組中識(shí)別出河流、三角洲、湖泊沉積體系,以及長(zhǎng)6油層組的沉積微相,并對(duì)長(zhǎng)6油層組各小層的沉積微相進(jìn)行了精細(xì)描述,反演出其古地理的演化歷程。