Knowledge Resource Center for Ecological Environment in Arid Area
Formation Conditions and Sedimentary Model of Over-Flooding Lake Deltas within Continental Lake Basins: An Example from the Paleogene in the Jiyang Subbasin, Bohai Bay Basin | |
Wang Jian1,2; Cao Yingchang1; Liu Huimin3; Gao Yongjin3 | |
通讯作者 | Cao Yingchang |
来源期刊 | ACTA GEOLOGICA SINICA-ENGLISH EDITION
![]() |
ISSN | 1000-9515 |
EISSN | 1755-6724 |
出版年 | 2015 |
卷号 | 89期号:1页码:270-284 |
英文摘要 | A large quantity of drilling core, paleontology, geochemistry and geophysics data revealed several features of the Jiyang subbasin during the deposition of the Ek(1)-Es(4)x members: (1) the paleotopography of the gentle slope belt had an extremely low gradient; (2) the paleoclimate frequently alternated between dry and wet periods in a generally arid setting; (3) there was strong weathering around the periphery of the basin; (4) the lake was very shallow; (5) the lake level frequently rose and fell; and (6) the sedimentary environment of the gentle slope belt was an over-flooding lake. All of these factors provided favorable geological conditions for the development of an over-flooding lake delta. The lithologies of the continental over-flooding lake delta deposits are complex and diverse. The compositional maturity is moderate to low, and the grain size distribution curves and sedimentary structures indicate the presence of both gravity and traction currents. The sedimentary microfacies associations consist of a combination of ordered superposition of flood channels, distributary channels and sheet sands. The delta exhibits a weak foreset seismic reflection. The over-flooding lake delta deposits are laterally extensive. The sandstone content is high, and the individual sandstone beds are thin. The flood channel and distributary channel deposits exhibit evidence of bifurcation and lateral migration. The distribution of the sandbodies and the oxidation color of the mudstones provide evidence of cyclic deposition. The paleoclimate was the dominant factor controlling the development of the over-flooding lake delta. Due to the frequently alternating wet and dry paleoclimates, the over-flooding lake delta is characterized by the development of a broad upper plain and a lower delta plain. The upper delta plain is characterized by flood channel deposits, whereas the lower delta plain is represented by distributary channel deposits. The transition zone is characterized by the interaction of flood channels and distributary channels. Due to fault activity, the sandbodies of the over-flooding lake delta were juxtaposed against hydrocarbon source rocks, which was favorable for the development of lithologic reservoirs or structural-lithologic reservoirs. The lower delta plain deposits comprise the most favorable reservoirs. |
英文关键词 | Jiyang subbasin continental basin over-flooding lake delta sedimentary model oil and gas exploration |
类型 | Review |
语种 | 英语 |
国家 | Peoples R China |
收录类别 | SCI-E |
WOS记录号 | WOS:000352828700022 |
WOS关键词 | SEQUENCE STRATIGRAPHY ; ENVIRONMENTAL-CHANGES ; INNER-MONGOLIA ; RIVER-DELTA ; CLIMATE ; SPOROPOLLEN ; LACUSTRINE ; CHINA ; RECONSTRUCTION ; ARCHITECTURE |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/185406 |
作者单位 | 1.China Univ Petr East China, Sch Geosci, Qingdao 266580, Shandong, Peoples R China; 2.China Univ Petr East China, Postdoctoral Res Ctr Geol Resources & Geol Engn, Qingdao 266580, Shandong, Peoples R China; 3.Sinopec Shengli Oil Field Co, Inst Geol, Dongying 257015, Shandong, Peoples R China |
推荐引用方式 GB/T 7714 | Wang Jian,Cao Yingchang,Liu Huimin,et al. Formation Conditions and Sedimentary Model of Over-Flooding Lake Deltas within Continental Lake Basins: An Example from the Paleogene in the Jiyang Subbasin, Bohai Bay Basin[J],2015,89(1):270-284. |
APA | Wang Jian,Cao Yingchang,Liu Huimin,&Gao Yongjin.(2015).Formation Conditions and Sedimentary Model of Over-Flooding Lake Deltas within Continental Lake Basins: An Example from the Paleogene in the Jiyang Subbasin, Bohai Bay Basin.ACTA GEOLOGICA SINICA-ENGLISH EDITION,89(1),270-284. |
MLA | Wang Jian,et al."Formation Conditions and Sedimentary Model of Over-Flooding Lake Deltas within Continental Lake Basins: An Example from the Paleogene in the Jiyang Subbasin, Bohai Bay Basin".ACTA GEOLOGICA SINICA-ENGLISH EDITION 89.1(2015):270-284. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。