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淮南地区新元古代九里桥组沉积组合及其环境意义

发表时间:2008-01-15  浏览量:1732  下载量:696
全部作者: 贾志海,洪天求,王伟
作者单位: 合肥工业大学资源与环境工程学院
摘 要: 淮南地区新元古代九里桥组主要由泥质,砂质和白云质灰岩组成,是研究地球早期生命演化、生物和环境相互关系的理想地层。该组风暴沉积、臼齿碳酸盐岩沉积、海绿石凝缩层沉积、生物沉积等的组合特征表明,该组沉积时期环境多变,沉积事件复杂,经历了早期较强的地震活动、中期频繁发生的海洋风暴活动、缓慢的海进过程和最大海泛事件、晚期的海平面快速下降等事件。相关沉积特征表明,九里桥组主要形成于海水较浅的缓斜坡环境,并经历了一次相对完整的海进—海退沉积旋回。
关 键 词: 沉积学;沉积环境;剖面研究;沉积组合;九里桥组;新元古代
Title: The sedimentary characters and its environmental analyse of the Neoproterozoic Jiuliqiao Formation in Huainan region, Anhui Province and its significance
Author: JIA Zhihai, HONG Tianqiu, WANG Wei
Organization: School of Resources and Environmental Engineering, Hefei University of Technology
Abstract: The Neoproterozoic Jiuliqiao Formation in Huainan region consisted of sandy,silty and dolomitic limestone,is the perfect strata for researches on the life evolution and their environmental restriction during the neoproterozoic. The outcropped characters of the tempestite, molar-tooth carbonatites, glauconite-condensed-sections and organic deposits indicate that, different events had happened in varied environments during the Jiuliqiao Stage, such as violent earthquakes in the shallower environment during the early period, frequent strong storms, stromatlite reef building process in the slowly transgressive environment and the maximum flooding events during the middle period, the abrupt environment changes and regression during the later period. The depositional characters indicate that the carbonatites of the Jiuliqiao Formation was formed mainly in the shallow ramp environment, and a whole transgressive—regressive depositional cycle had occurred during the Jiuliqiao Stage.
Key words: Sedmentology; depositional environments; field research; sedimentary association; Jiuliqiao Formation; Neoproterozoic
发表期数: 2008年5月第1期
引用格式: 贾志海,洪天求,王伟. 淮南地区新元古代九里桥组沉积组合及其环境意义[J]. 中国科技论文在线精品论文,2008,1(1):73-84.
 
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