| 桌子山地区中奥陶统克里摩里组深水等深流沉积模式 |
| |
| 引用本文： | 李向东,阙易,郇雅棋.桌子山地区中奥陶统克里摩里组深水等深流沉积模式[J].高校地质学报,2018,24(2):285. |
| |
| 作者姓名： | 李向东 阙易 郇雅棋 |
| |
| 作者单位： | 昆明理工大学国土资源工程学院;中石油冀东油田分公司南堡油田作业区 |
| |
| 摘 要： | 等深流沉积是深水环境中牵引流沉积的重要类型之一。虽然研究程度相对较高，但主要以深海测量和大洋钻探为平
台对现代海洋中的等深流进行研究，特别是大洋钻探339航次的执行，将等深流沉积研究推向一个新的阶段（等深岩丘结
构剖析），而对地层记录中的等深流沉积研究却非常薄弱，从而也制约了对等深流沉积的研究，特别是等深流沉积模式的建
立。鄂尔多斯盆地西缘北部桌子山地区中奥陶统达瑞威尔阶克里摩里组广泛发育等深流沉积，此次在详细的野外观察基础
上，对内蒙古乌海市海南区石峡谷剖面进行沉积学研究，该剖面克里摩里组从下到上可分为三段：下段以薄－中层叠置石
灰岩为特征、中段以石灰岩－泥岩岩组与泥岩互层为特征，上段以条纹状泥岩为特征。三段沉积分别代表了深水环境下等
深流水道沉积、天然堤沉积和深水盆地平原区极弱等深流沉积，在垂向上组成了一个完整的等深流水下水道－天然堤沉积
体系。
|
| 关 键 词： | 等深流沉积 水道-天然堤体系 中奥陶统 鄂尔多斯盆地 |
Depositional Model for Contourites the Kelimoli Formation,Middle Ordovician,Zhuozishan Area |
| |
| LI Xiangdong,QUE Yi,HUAN Yaqi.Depositional Model for Contourites the Kelimoli Formation,Middle Ordovician,Zhuozishan Area[J].Geological Journal of China Universities,2018,24(2):285. |
| |
| Authors: | LI Xiangdong QUE Yi HUAN Yaqi |
| |
| Abstract: | Contourite is an important sedimentary type of traction current deposits in a deep-water environment. Although there has
been a lot of research on contourites, most studies focus on contour concurrent deposition in modern oceans by bathymetric
investigation and deep-sea drilling (DSDP, ODP and IODP). Following the implementation of the IODP (Integrated Ocean Drilling
Program) Expedition 339 (The Mediterranean outflow), the study of contourites has reached a new stage for analyzing the vertical and
lateral succession of contour drifts. However, there is still a great restriction on further study of contourites, especially on the
depositional model for contour currents because of the big gap between modern sea floor and stratigraphic records. This article is
focused on the ancient contour current deposits developed in the northwestern margin of the Ordos Basin, in Darriwilian Stage, Middle
Ordovician. Sedimentology analysis based on the detailed field work in shixiagu section, Hainan area in Wuhai city of Inner Mongolia
allows us to differentiate three vertical successions, i.e., the medium-to thin-bedded amalgamated limestone, the alternation of
limestone-mudstone unit and mudstone, and the striation mudstone is the notable characteristics in the lower, middle, and upper part of
the Kelimoli Formation, respectively. These three successions are proposed to represent the deposits of channel, levee, and basin in
deep-water environments where contour currents dominate. Thus, a conceptual model of deep-water channel-levee system for the
deposition of contour currents is developed from the geological records in the western Ordos Basin |
| |
| Keywords: | contour current deposition channel-levee system Middle Ordovician Ordos Basin |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《高校地质学报》浏览原始摘要信息 |
|
点击此处可从《高校地质学报》下载全文 |
|
