冀西南中元古界长城系赵家庄组叠层砂质MISS组合的发现及意义  

The discovery and significance of mesoproterozoic stomatolithic sandy MISS group in Zhaojiazhuang formation,Changcheng System,South-western Hebei,China

作　　者：贺萍 王青春 申方乐 杨克基 马宝军 李伟 王对兴 杜江民 HE Ping;WANG Qingchun;SHEN Fangle;YANG Keji;MA Baojun;LI Wei;WANG Duixing;DU Jiangmin(School of Geosciences, Yangtze University, Wuhan 430100, China;School of Geosciences, Hebei GEO University, Shijiazhuang 050031, China;Hebei Key Laboratory of Strategic Critical Mineral Resources, Hebei GEO University, Shijiazhuang 050031, China;Shandong Key Laboratory of Depostional Mineralization & Sedimentary Mineral, ShandongUniversity of Science and Technology, Qingdao 266590, China;College of Huaxin, Hebei GEO University, Shijiazhuang 050031, China)

机构地区：[1]长江大学地球科学学院,湖北武汉430100 [2]河北地质大学地球科学学院,河北石家庄050031 [3]河北地质大学河北省战略性关键矿产资源重点实验室,河北石家庄050031 [4]山东科技大学山东省沉积成矿作用与沉积矿产重点实验室,山东青岛266590 [5]河北地质大学华信学院,河北石家庄050031

出　　处：《西北大学学报（自然科学版）》2020年第6期1005-1014,共10页Journal of Northwest University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(41802016);山东省沉积成矿作用与沉积矿产重点实验室开放基金资助项目(DMSM20190027);河北地质大学青年科技基金资助项目(QN201705)。

摘　　要：在冀西南中元古界长城系赵家庄组沉积特征研究过程中,发现了一种特殊沉积构造——“叠层”砂质MISS组合。其在平面上与岩层面齐平,仅表现为颜色的明显差异,轮廓清晰截然,且内部具同心圆状结构;垂向上,内部纹层多与外部不一致,除颜色差异之外,还具有“叠层”特点,故将其命名为一种新的MISS类型——“叠层”砂质MISS组合。通过分析其产出背景、发育特征、成因及演化特点,认为叠层砂质MISS组合主要形成于潮坪相潮下和潮间环境,包括典型叠层砂质MISS(可演变为颗粒状砂质MISS、叠合砂质MISS等)和非典型砂质MISS,且随着沉积环境的变化,具有向碳酸盐岩MISS或常规MISS演化的趋势。叠层砂质MISS组合的发现和研究,为微生物成因沉积构造的研究提供了新的依据和方向。Stomatolithic Sandy MISS assemblage(SSMISSa),one new special kind of sedimentary structure,has been found during the study on the sedimentary characteristics of Zhaojiazhuang formation of Mesoproterozoic Changcheng system in south-western of Hebei Province,China.The MISS found in Zhaojiazhuang formation is unique.With obviously different color,distinctive outline and internal concentric circular on top surface,the MISS in the study area are flush with the top of rock strata.Vertically,the internal laminate is mostly inconsistent with outer.On the basis of the different color and"stomatolithic"features,SSMISSa has been identified.The studies on the production background,development feature,genesis and evolutionary characteristics,showed that the SSMISSa are mainly formed in subtidal and intertidal environments of tidal-flat facies.Typical stomatolithic sandy MISS(which can evolve into granular or superimposed sandy MISS,et al)and atypical sandy MISS are the main subgroups.With the changes of sedimentary environment,carbonate rocks MISS or conventional MISS are its evolutionary trend.The discovery and the study of SSMISSa provide new basis and direction for the study of microbially induced sedimentary structures.

关 键 词：微生物成因沉积构造 中元古界 赵家庄组 叠层砂质MISS 

分 类 号：P534.3[天文地球—古生物学与地层学] P512.5[天文地球—地质学]