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Sedimentary characteristics of microbialites influenced by volcanic eruption: a case study from the Lower Cretaceous Shipu Group in Zhejiang Province, East China

机译：火山爆发影响的微生物矿石沉积特征 - 以浙江省浙江省下白垩纪船舶集团为例

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摘要

This study describes a sequence of microbialites and volcanics of the Lower Cretaceous Shipu Group, an example of microbialites influenced by volcanic activity. It is located at Shipu town in eastern Zhejiang Province on the coast of southeastern China. Based on macroscopic outcrop observations, microscopic examination of thin sections,electron probe microanalysis(EPMA), field emission scanning electron microscopy(FESEM) imaging analysis, and energy dispersive X-ray spectrometry(EDS) analysis, nine microbialite–tuffite assemblages have been recognized in the section. Their thickness increased gradually upwards as volcanism decreased. There are ooids, bioclastic grains,intraclasts and tuffaceous grains in the grain shoal with local dolomitization. Above the grain shoal, microbial reefs develop either individually or conjoining with adjacent ones, and consist of stromatolites and serpulid tubes with common recrystallization. Tubes of serpulids are calcified and the tube wall is micrite. The tube and intertube parts are filled by sparry calcite. Colonial serpulids are surrounded by microbes to form stromatolites. Black layers of stromatolites contain many calcite crystals with fan-shaped growth pattern and preserved organic matter. Microbes are so well preserved in crystal lattices that the original microstructure of the microbes can be clearly observed by FESEM imaging analysis. Microbial reefs develop at a local high point near or above fair-weather wave-base where waves removed fine volcanic ashes. Interreef deposits are coarse tuffite due to physical differentiation. Volcanic activity could provide rich nutrition for microbes, but too much fine volcanic ash inhibits microbial growth. As a result, a moderate supply of volcanic ash favors the development of microbialites.
机译：本研究描述了一系列微生物矿石和下白垩纪船库的序列，是受火山活性影响的微生物矿的一个例子。它位于浙江东南部东部的船屋镇。基于宏观露头观察，微观检查薄膜，电子探针微分析（EPMA），现场发射扫描电子显微镜（FESEM）成像分析，和能量分散X射线光谱（EDS）分析，已识别九个微生物凝灰石组件在该部分。随着火山的降低，它们的厚度逐渐增加。在谷物浅中出现有源，生物塑料颗粒，腔内和凝灰岩颗粒，具有局部二孔。在籽粒浅中，微生物珊瑚礁可单独形成或与相邻的叶片一起形成，并且由仲托尔酯和丝状管组成，具有常用的再结晶。硅化石管钙化，管壁是微型的。管和内部部件由Sparry方解石填充。殖民六种硅化石被微生物包围以形成脱氨酸盐。黑色层粒醇含有许多具有扇形生长模式和保存的有机物的方解石晶体。微生物在晶格中保存得很好，所以可以通过FeSEM成像分析清楚地观察微生物的原始微观结构。微生物珊瑚礁在附近或上乘公平天气波基底的局部高点开发，波浪除去了细火山灰烬。由于物理分化，Interneef沉积物是粗糙的牙龈。火山活性可以为微生物提供丰富的营养，但细胞灰抑制微生物生长过多。结果，对火山灰的适度供应有利于微生物矿石的发育。

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  • 来源
    《古地理学报：英文版》 |2020年第2期|P.232-245|共14页
  • 作者

    Xiao-Fang Wang; Xiu-Cheng Tan; Shao-Nan Zhang; An-Jiang Shen; Chang Li; Guang Hu; Xin Wang; Zi-Liao Chen; Li-Yin Pan; Jie Zhang; Wei Chen;

  • 作者单位

    State Key Laboratory of Oil and Gas Geology and Exploitation Southwest Petroleum University Chengdu 610500 Sichuan Province China School of Geoscience and Technology Southwest Petroleum University Chengdu 610500 Sichuan Province China Key Laboratory of Carbonate Reservoirs China National Petroleum Corporation(CNPC) Hangzhou 310023 Zhejiang Province China PetroChina Hangzhou Research Institute of Geology Hangzhou 310023 Zhejiang Province China.;

    State Key Laboratory of Oil and Gas Geology and Exploitation Southwest Petroleum University Chengdu 610500 Sichuan Province China School of Geoscience and Technology Southwest Petroleum University Chengdu 610500 Sichuan Province China Key Laboratory of Carbonate Reservoirs China National Petroleum Corporation(CNPC) Hangzhou 310023 Zhejiang Province China;

    State Key Laboratory of Oil and Gas Geology and Exploitation Southwest Petroleum University Chengdu 610500 Sichuan Province China School of Geoscience and Technology Southwest Petroleum University Chengdu 610500 Sichuan Province China;

    Key Laboratory of Carbonate Reservoirs China National Petroleum Corporation(CNPC) Hangzhou 310023 Zhejiang Province China PetroChina Hangzhou Research Institute of Geology Hangzhou 310023 Zhejiang Province China.;

    Key Laboratory of Carbonate Reservoirs China National Petroleum Corporation(CNPC) Hangzhou 310023 Zhejiang Province China PetroChina Hangzhou Research Institute of Geology Hangzhou 310023 Zhejiang Province China.;

    State Key Laboratory of Oil and Gas Geology and Exploitation Southwest Petroleum University Chengdu 610500 Sichuan Province China School of Geoscience and Technology Southwest Petroleum University Chengdu 610500 Sichuan Province China Key Laboratory of Carbonate Reservoirs China National Petroleum Corporation(CNPC) Hangzhou 310023 Zhejiang Province China;

    Key Laboratory of Carbonate Reservoirs China National Petroleum Corporation(CNPC) Hangzhou 310023 Zhejiang Province China PetroChina Hangzhou Research Institute of Geology Hangzhou 310023 Zhejiang Province China.;

    Key Laboratory of Carbonate Reservoirs China National Petroleum Corporation(CNPC) Hangzhou 310023 Zhejiang Province China PetroChina Hangzhou Research Institute of Geology Hangzhou 310023 Zhejiang Province China.;

    Key Laboratory of Carbonate Reservoirs China National Petroleum Corporation(CNPC) Hangzhou 310023 Zhejiang Province China PetroChina Hangzhou Research Institute of Geology Hangzhou 310023 Zhejiang Province China.;

    Key Laboratory of Carbonate Reservoirs China National Petroleum Corporation(CNPC) Hangzhou 310023 Zhejiang Province China PetroChina Hangzhou Research Institute of Geology Hangzhou 310023 Zhejiang Province China.;

    Key Laboratory of Carbonate Reservoirs China National Petroleum Corporation(CNPC) Hangzhou 310023 Zhejiang Province China PetroChina Hangzhou Research Institute of Geology Hangzhou 310023 Zhejiang Province China.;

  • 收录信息 中国科学引文数据库(CSCD);
  • 原文格式 PDF
  • 正文语种 chi
  • 中图分类 喷出岩（火山岩）;
  • 关键词

    Microbialite; Stromatolites; Tuffite; Lower Cretaceous; Shipu Group;

    机译：微生物石;脱盐胶质;凝灰岩;下白垩纪;Shipu集团;
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