| 滇西保山施甸地区中泥盆世沉积相特征及沉积环境分析 |
| |
| 引用本文： | 马永生
,李树誉.滇西保山施甸地区中泥盆世沉积相特征及沉积环境分析[J].现代地质,1989,3(4):388. |
| |
| 作者姓名： | 马永生 李树誉 |
| |
| 摘 要： | 本文运用现代沉积学的理论和手段对滇西保山施甸地区的中泥盆统进行了研究。在详细岩相、生物相特征分析的基础上,划分出泥晶灰岩相、塌积（角）砾岩相、风暴岩、亮晶灰岩相及生物灰岩相5种岩相,对工作区中泥盆世的古地理面貌、沉积环境及主要沉积作用作了较为详尽的阐述。作者认为中泥盆世该区及整个三江地区处于最大海侵期。中泥盆统主要为一套正常开放的陆棚沉积,并发育有典型碳酸盐岩风暴沉积。
|
| 关 键 词： | 沉积相 沉积环境 古地理 风暴岩 |
CARBONATE FACIES AND DEPOSITIONAL ENVIRONMENTS ANALYSIS OF THE MALUTANG FORMATION AND HEYUANZHAI FORMATION (MIDDLE DEVONIAN) IN BAOSHAN-SHIDIAN DISTRICT,YUNNAN |
| |
| Ma Yongsheng Li Shuyu.CARBONATE FACIES AND DEPOSITIONAL ENVIRONMENTS ANALYSIS OF THE MALUTANG FORMATION AND HEYUANZHAI FORMATION (MIDDLE DEVONIAN) IN BAOSHAN-SHIDIAN DISTRICT,YUNNAN[J].Geoscience——Journal of Graduate School,China University of Geosciences,1989,3(4):388. |
| |
| Authors: | Ma Yongsheng Li Shuyu |
| |
| Institution: | China University of Geosciences |
| |
| Abstract: | The Malutang Formation (D2mt) and the Heyuanzhai Formation (D2h) in Baoshan-Shidian district were deposited within a broad, shallow epicontinental sea (Middle Devonian).Five facies(some are facies associations)were deposited
in six distinct dcpositional environmental units.The facies and the environments are as follows.
Facies(facies association) Environments
Crinoidal limestone................................................................Subtidal with high energy
Tempestite................................................................................x
Intrasparite.........................................................晻?.....?....... Shelf between normal wave
Monosomic coral limestone
and storm wave base
Bryozoan limestone...................................................?...........)
Micrite with bioclasts................Middle to upper parts of shelf with lower energy
Sparite with bioclasts............................................ 厖厖厖厖厖厖Lower shelf with higher energy
Sparite-bioclasts limestone
Pebble-banding intrasparite with bioclasts ................Shelf margin(towards slope)
Slump breccia................................................................................................................Slope
The D2mt is dominated with micrite which indicated a middle to upper shelf depositional environment with lower energy.
The D2hA can be divided into three parts from bottom to top. The lower part presents the shelf between normal wave and storm wave base. The middle part was a slope depositional association. The upper part indicated the environment from shelf to subtidal with high energy which includes intrasparite and biolime?stone.
It was during the Middle Devonian that Baoshan-Shidian district possessed the broadest depositional area. The sedimental background was restricted by the Nujiang deep fault and Honghe deep fault. |
| |
| Keywords: | : sedimendary facies depositional environment palaeogeography tempestite |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《现代地质》浏览原始摘要信息 |
| 点击此处可从《现代地质》下载免费的PDF全文 |
