地质学报2024，Vol.98Issue(2)：346-362,17.DOI:10.19762/j.cnki.dizhixuebao.2023313
华南石炭纪中期白云岩地层分布及其形成模式
Distribution and causes of Mid-Carboniferous dolomitization in South China
摘要
Abstract
Carboniferous is an important period in the geological history when the Hercynian Orogeny occurred and the Late Paleozoic ice age(LPIA)reached its peak,which resulted in frequent fluctuations of eustatic sea level and dramatic changes in palaeoclimate and palaeoenvironment.At the Mid-Carboniferous boundary interval,a vast shallow platform dolomitization occurs widely in South China.This paper summarizes the thickness and age of dolostones in three major carbonate platforms in South China,and further clarifies their temporal and spatial distribution.In terms of characteristics of global climate and environment in this interval,we propose that the maximum glaciation could be the cause of eustatic sea-level fall which resulted in the widespread dolomitization in South China.The different temporal distributions of dolostones among sedimentary basins in South China might be related to their independent developing history of basins and different diagenetic patterns.The dolomitization in the Middle-Lower Yangtze Carbonate Platform could be the Sabkha pattern and the seepage-reflux pattern in the early burial stage,therefore,forming relatively thin-bedded dolostone deposits.The thick-bedded dolostones in the Central-southern Carbonate Platform and the southwestern Carbonate Platform could have been formed in the seepage-reflux pattern.关键词
石炭纪中期/白云岩/时空分布/古环境/白云岩化模式Key words
Mid-Carboniferous/dolostone/temporal and spatial distribution/palaeoenvironment/dolomitization pattern引用本文复制引用
宋英凡,王向东,李莹,史宇坤,胡科毅,黄兴,盛青怡,要乐..华南石炭纪中期白云岩地层分布及其形成模式[J].地质学报,2024,98(2):346-362,17.基金项目
本文为国家自然科学基金项目(编号 91955201)和第二次青藏高原综合科学考察研究(编号 2019QZKK0706)联合资助的成果. （编号 91955201）
