石油实验地质Issue(1)：1-7,7.DOI:10.11781/sysydz201401001
塔里木盆地肖尔布拉克剖面奇格布拉克组层序界面与沉积相研究
Stratigraphic sequences and sedimentary facies of Qigebulak Formation at Xianerbulak, Tarim Basin
摘要
Abstract
Sinian is one of the most important stages of the development of passive continental margin basin in the Tarim Basin. Based on the measurement and analysis of profiles of the Qigebulak Formation (Z2g) of the upper Sinian at Xianerbulak of Aksu, it has been concluded that theⅢ-order sequence boundary surfaces with hiatus and lithofacies transition and theⅡ-order surfaces with transgressive onlap and sequence unconformity interface develop at the bottom and on the top of the Qigebulak Formation, respectively. In the middle of the formation, deepening interruption surface and shallowing-upwardⅣ-Ⅴsequences develop. The Milankovitch cycle of carbonate rocks has been found, under either peritidal ( becoming shallow, fine-grained and thin upwards) or subtidal ( becom-ing shallow, coarse-grained and thick upwards) environments controlled by sea level changes. Stromatolites are widespread, mainly consisting of various microbial mats. The Qigebulak Formation can be divided into 3 lithologic sections from bottom to top, among which the lower section changes from supratidal to intertidal, the lower part of intertidal to intertidal, and intertidal to supratidal; the middle section is characterized by the frequent variation from the lower part of intertidal to subtidal and the stable environment of subtidal. Carbon isotopes are strongly positive at the bottom, stable in the middle and upper sections, and weakly positive at the top. Sea levels change frequently at the bottom, and stably decrease in the middle and upper sections.关键词
沉积相/层序界面/微生物岩/奇格布拉克组/上震旦统/阿克苏/塔里木盆地Key words
sedimentary facies/sequence boundary/microbial rock/Qigebulak Formation/upper Sinian/Aksu/Tarim Basin分类
能源科技引用本文复制引用
钱一雄,杜永明,陈代钊,尤东华,张军涛,陈跃,刘忠宝..塔里木盆地肖尔布拉克剖面奇格布拉克组层序界面与沉积相研究[J].石油实验地质,2014,(1):1-7,7.基金项目
国家重点基础研究发展计划（973）项目（2005CB422100、2012CB214802）和国家科技重大专项项目（2011ZX05005-002、2011ZX05008-003）联合资助。 （）
