首页> 外文会议>Proceedings of the 2nd China-Japan graduate student forum : Life, environment and energy >Microbially Induced Sedimentary Structures in the Mesoproterozoic Ruyang Group from Lushan Area,Southern Henan Province——A New Window through Early Life
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Microbially Induced Sedimentary Structures in the Mesoproterozoic Ruyang Group from Lushan Area,Southern Henan Province——A New Window through Early Life

机译:豫南芦山地区中元古代如阳群微生物诱导的沉积结构-生命早期的新窗口

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摘要

Microbially induced sedimentary structures (MISS),including sand cracks,sand chips,mat chips and mat wrinkles,widely exist in the Mesoproterozoic Ruyang Group,Lushan area,Henan Province.Those structures can be further defined as mat destruction structures.Meanwhile,sand cracks can be divided into six categories according to shape difference:spindle-shaped,radial,dendritic,Leaf-vein-shaped,and polygonal reticulate shape patterns.Sedimentary environment,from the upper subtidal zone to intertidal zone,especially the transitional zone between foreshore sandstone and backshore mudstone,is favorable for MISS,which implies a comparatively stable stage for Xiong'er aulacogen in the Mesoproterozoic.This study reveals that the diversity of sand cracks is determined by sedimentary environment (substrate and subaerial exposure) and microbial process (the thickness of microbial mat).MISS from the Ruyang Group shows a picture of very active microbial population in the Mesoproterozoic ocean,who must have played an important role in oxidizing environment at that time.
机译:河南芦山地区中元古代乳阳群广泛存在微生物引起的沉积结构(MISS),包括砂缝,砂屑,垫屑和垫层皱纹。这些结构可进一步定义为垫层破坏结构。根据形状差异可分为六类:纺锤形,放射状,树状,叶脉状和多边形网状。沉积环境,从上潮下带到潮间带,特别是前砂岩之间的过渡带。研究表明,砂裂缝的多样性是由沉积环境(基质和地下暴露)和微生物过程(厚度)决定的。汝阳小组的MISS展示了中元古代海洋中非常活跃的微生物种群的照片,当时在氧化环境中起了重要作用。

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