Sedimentary Facies and Geochemical Characteristics of Mesoproterozoic Gaoyuzhuang Formation in Xuanlong Depression
详细信息
- 责任者：Lv Qiqi (MOE Key Laboratory of Exploration Technologies for Oil and Gas Resources ; Yangtze University ; Jingzhou 434023 ; China) ; Luo Shunshe
- 刊名：Fault-Block Oil and Gas Fields
- 出版年：2011
- 卷期：18(3)
- 关键词：沉积相 ; sedimentary facies ; 地球化学 ; geochemistry ; 碳酸盐台地 ; carbonate platforms
- 页码：p.312-316
- 图表：illus., 3 tables, 7 refs.
- 分类号：0803
- issnNo：ISSN1005-8907
- isbnNo：CN41-1219/TE
摘要
Mesoproterozoic Gaoyuzhuang Formation in Xuanlong Depression is mainly a carbonate sedimentary system.Through the cautious observation,indoor slice measurement and geochemistry analysis,the author considers that the sedimentary facies of Gaoyuzhuang Formation is carbonate platform facies.It can be furtherly devided into two subfacies including tidal-flat,reef facies and four microfacies consisting of supratidal,intertidal,subtidal zones and barrier product-bond reef.From the first section to the eighth section of Gaoyuzhuang Formation,the tidal-flat facies of carbonate develops.In late phase of Gaoyuzhuang Formation sedimentation,due to the effect of lifting movement of Luan County,the water body becomes relatively shallow.In the ninth and tenth sections,the reef facies develops.Based on the statistics of sedimentary facies,the analysis results of fourty-nine major elements and seventy trace elements show that the geochemical charateristics and sedimentary environment have closely relationship with primary sedimentary environment,and the geochemical characteristics can be regarded as an important mark.Among them,Sr,Sr/Ba and Sr/Ca values increase with the depth of water body,which are closely related to sedimentary environment and can be used to identify the sedimentary facies,The elements V,Rb and Be values are sensitive to the change of environment.They also have increasing characteristics with the depth of water body,such as from supralittoral zone to intertidal zone and to subtidal zone.