古地理学报2011，Vol.13Issue(2)：127-138,12.
河南省上石炭统一下二叠统本溪组沉积时期古地理特征
Palaeogeographic characteristics during the depositional period of Upper Carboniferous-Lower Permian Benxi Formation in Henan Province
摘要
Abstract
The Upper Carboniferous-Lower Permian Benxi Formation of Henan Province was deposited in an epicontinental sea environment, and developed a set of deposits of lagoon facies characterized by the alumina-ferrous mudstones bearing iron ore and bauxite, and tidal flat facies, restricted carbonate platform facies and sand bar ( barrier island) facies. Based on the isoline trend analyses of thickness of strata and carbonate rocks, the percentage of sandstone content, as well as distribution features of facies fossils, trace elements and deposit types, four types of lithofacies areas are divided, including the coastal lagoon mudstone lithofacies, lagoon-tidal flat sandstone and mudstone lithofacies, restricted platform carbonate and clastic rock lithofacies, and sand bar (barrier island) clastic rock lithofacies. The Late Carboniferous-Early Permian palaeotopographic feature of Henan Province displays a higher terrain in the south and the west, and a lower terrain in the north and the east, and exists a large palaeo-uplift area under water in the center zone, therefore, the spread of the sea over land is from southeast and northeast to west in this province; Old lands are located on the Funiu Mountain in southwestern Henan Province and Zhongtiao Mountain in western Henan Province. Therefore, sedimentary area extends from west to east in a fan shape and there are two sedimentary areas with the largest thickness of this formation that lie in the northeast and east of Henan Province. It is possible to infer that sediment source is mainly from the Zhongtiao Old Land.关键词
岩相古地理/沉积相/本溪组/上石炭统一下二叠统/河南省分类
天文与地球科学引用本文复制引用
陈守民,张璐,胡斌,宋慧波,刘顺喜..河南省上石炭统一下二叠统本溪组沉积时期古地理特征[J].古地理学报,2011,13(2):127-138,12.基金项目
国家自然科学基金项目(编号:40872001),国家高校博士点专项基金项目(编号:20094116110002),河南省科技计划项目(编号:092300410167)和河南省生物遗迹与成矿过程重点实验室开放基金项目(编号:OTMP0904)联合资助 （编号:40872001）
