沉积学报2017，Vol.35Issue(6)：1121-1132,12.DOI:10.14027/j.cnki.cjxb.2017.06.004
豫西济源二叠纪末—三叠纪初陆相微生物成因构造及其古环境意义
Characteristics and Paleoenvironmental Significance of Microbially Induced Sedimentary Structures ( MISSs ) in Terrestrial P-T Boundary in Jiyuan, Western Henan Province
摘要
Abstract
We have firstly reported the presence of eight kinds of microbially induced sedimentary structures ( MISSs) or sedimentary surface textures, including growth ridges, growth postulas, curved desiccation cracks, spindle-shaped cracks,"Manchuriophycus" structures, dendritic desiccation cracks, polygonal desiccation cracks and desiccation cracks from the terrestrial upper Permian Sunjiagou Formation and lower Triassic Liujiagou Formation in Jiyuan west-ern Henan. Large U ridges, oriented sand quartz, mica grains and thin clayey laminae arranged parallel to bedding plane are the main features visible under the microscope. A series of evidence indicate that the Jiyuan MISSs are of bi-ogenic origin. Compared with MISSs of the Mesoproterozoic Yunmengshan Formation in Lushan, the Mesoproterozoic Changchougou Formation in Licheng, Lower Triassic Liujiagou Formation in Yiyang and Liulin, we concluded that mi-crobially induced sedimentary structures has special taphonomic characteristics and was controlled by the end-Permian mass extinction, sedimentary environments and climate factor in Jiyuan. MISSs of Jiyuan stands for terrestrial ecosys-tems following the end-Permian mass extinction with rich microbial community, scarce metazoan, poor plant, hot weather and serious soil erosion.关键词
微生物成因构造/二叠纪末大灭绝/陆地生态系/豫西济源Key words
microbially induced sedimentary structures/the end-Permian mass extinction/terrestrial ecosystems/Jiyuan/western Henan province分类
天文与地球科学引用本文复制引用
郑伟,齐永安,邢智峰,白万备,陈百兵,李小燕..豫西济源二叠纪末—三叠纪初陆相微生物成因构造及其古环境意义[J].沉积学报,2017,35(6):1121-1132,12.基金项目
国家自然科学基金项目(41772110,41472083,41202071)[National Nature Science Foundation of China, No. 41772110, 41472083,41202071] （41772110,41472083,41202071）
