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《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

卷:

第41卷

期数:

2019年第06期

页码:

734-747

栏目:

基础地质与矿产地质

出版日期:

2019-11-15

文章信息/Info

Title:

Stromatolite Characteristics and Sedimentary Environment Analysis of Sinian Dengying Formation in Jiangshan Area of Zhejiang, China

文章编号:

1672-6561(2019)06-0734-14

作者:

乔丹; 时国^*; 任玥; 张兆阳; 陶菁

(东华理工大学 地球科学学院,江西 南昌 330013)

Author(s):

QIAO Dan;  SHI Guo^*;  REN Yue;  ZHANG Zhao-yang;  TAO Jing

(School of Earth Sciences, East China University of Technology, Nanchang 330013, Jiangxi, China)

关键词:

藻类微生物;  叠层石;  灯影组;  震旦系;  沉积环境;  扬子地块;  浙江

Keywords:

algal microbiology;  stromatolite;  Dengying Formation;  Sinian;  sedimentary environment;  Yangtze block;  Zhejiang

分类号:

P588.24⁺8; P52

DOI:

-

文献标志码:

A

摘要:

浙江江山地区上震旦统灯影组叠层石发育,宏观形态类型多样,且保存完好,是研究江山地区晚震旦世沉积环境较为理想的沉积构造。叠层石的宏观形态特征在地层剖面纵向上表现为水平纹层状→波纹状→丘状→锥状→柱状演变,其中柱状叠层石构成叠层石礁。通过对叠层石的宏观沉积特征及微观特征分析,初步认为该区的水平纹层状叠层石发育在潮上带,波纹状叠层石、丘状叠层石发育在潮间带,锥状叠层石、柱状叠层石发育在潮下带。根据浙江江山地区震旦系灯影组上段叠层石的沉积环境指示,认为灯影晚期研究区处于浅海局限碳酸盐岩台地环境,经历了潮上带→潮间带→潮下带的水体加深过程,可能主要受控于该时期扬子地块东南缘拉张沉降构造影响。

Abstract:

A large number of stromatolites are developed in Upper Sinian Dengying Formation of Jiangshan area, Zhejiang. The stromatolites are preserved intact and varied in macro-morphology. Their morphological features in the vertical section of the stratum are horizontally stratified→corrugated→mound→conical→columnar evolution, in which the columnar stromatolites form the main body of the stromatolite reefs. Based on the analysis of the macroscopic and microscopic characteristics of stromatolites, the horizontally stratified stromatolites in Jiangshan area are developed in the supratidal zone, the corrugated and mound stromatolites are developed in the intertidal zone, and the conical and columnar stromatolites are developed in the subtidal zone. According to the sedimentary environment indication of the stromatolite in the upper section of Sinian Dengying Formation, Jiangshan area, Zhejiang, the study area in the late Dengying period is in the shallow sea-confined carbonate platform environment and experiences the process of water body deepening in the supratidal zone→intertidal zone→subtidal zone. It may be mainly controlled by the tensile sedimentation structure of the southeastern margin of Yangtze block during this period.

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收稿日期:2019-08-05; 修回日期:2019-09-22投稿网址:http:∥jese.chd.edu.cn/
基金项目:国家自然科学基金项目(41002007); 江西省教育厅科技计划项目(GJJ160545)
作者简介:乔 丹(1995-),男,吉林舒兰人,理学硕士研究生,E-mail:jilin8819636@163.com。
*通讯作者:时 国(1978-),男,山东莱芜人,副教授,理学博士,E-mail:sdsg2007@126.com。

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更新日期/Last Update: 2019-11-19