Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Journal of Northeast Petroleum University》 2017-02
Add to Favorite Get Latest Update

Geochemical characteristics and geological significance of the E_3s_1 lacustrine mixed sedimentary rocks in the east actic region of Shijiutuo symon fault in Qinnan sag

Feng Chong;Wang Qingbin;Dai Liming;Guo Longlong;Lu Huan;Tianjin Branch,CNOOC China Company Limited;  
In order to reveal the formation condition and development features of the mixed rocks of first member of the Paleocene Shahejie formation in Qinhuangdao 29-A structure,the geochemical characteristics,sedimentary environment and provenance were studied by using geochemical methods based on the analysis of mixed rocks petrology.Results show that MgO,CaO are significantly correlated with SiO_2,which reveals that the development of carbonate was significantly affected by the terrigenous input and carbonate component development during the intermittent period of terrigenous supply.Geochemical index of B,Sr/Cu and Sr/Ba is higher,reflecting the sedimentary environment of brackish environment under the arid climate.δEu positive anomaly and high homogenization temperature of inclusion show that hydrothermal alteration on reservoirs,the low ratio of Ti/Zr,Cr/Zr and the distribution patterns of REE revealed that acidic igneous rock was the main terrigenous clastic.To sum up,the study area mixed sedimentary rocks development under brackish water environment of arid climate,during the terrigenous clast supply intermission of fan delta with parent rock of acidic volcanic rock,and later received deep hydrothermal alteration.
【Fund】: 国家科技重大专项(2016ZX05024-003-005)
【CateGory Index】: P588.2;P618.13
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved