| 摘要: |
| 本文通过对古构造、古气候、古地理和沉积相等方面的研究,探讨控制湘中地区早石炭世石膏矿床形成的有利因素。湘中膏盐盆地是两隆夹持的断陷盆地。早石炭世大塘晚期梓门桥时位于N10.7°的高温炎热气候区。盆地内又被水下隆起分隔为三个次级盆地,当海水退却时,在次级盆地内形成咸化澙湖及萨布哈型潮坪等环境,随着海水不断蒸发、浓缩,便沉积了石膏岩。这些有利因素使湘中地区大型石膏矿床得以形成。 |
| 关键词: 早石炭世 石膏矿 控制因素 潟湖 萨布哈型潮坪 |
| DOI： |
| 附件 |
| 投稿时间：1992-07-23 |
| 基金项目: |
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| AN APPROACH TO THE CONTROLLING FACTORS OF THE CARBONIFEROUS GYPSUM DEPOSITS IN CENTRAL HUNAN |
| Liu Weihong, Li Yaoxi, Zhang Ying |
| (Nanjing Institute of Geology and Mineral Resources) |
| Abstract: |
This paper discusses the favourable factors governing the Early Carboniferous gypsum deposits in central Hunan on the basis of the studies of palaeotectonics, palaeoclimates, palaeogeography and sedimentary facies.
The gypsum basins in central Hunan are fault basins intermediate between two rises. with a palaeolatitude of 10.7° north latitude and the palaeotemperatures ranging from 43 to 47℃ during the deposition of the late Datangian(Early Carboniferous) Zimenqiao Formation. These basins consist of three secondary-order basins separated by submarine rises, in which the salinized lagoon and sabkha-type tidal flat environments were formed due to regression. The evaporation and concentration of sea water resulted in the precipitation of gypsum. All these factors facilitate the formation of the large-scale gypsum deposits in central Hunan. |
| Key words: Early Carboniferous gypsum deposit controlling factors lagoon sabkha-type tidal flat |
