| 摘要: |
| 对达来诺尔湖北岸岸边(DL-0)、湖中心(DL-1)和湖南岸(DL-2)3个点的岩心沉积物进行了详细的岩性分析、粒度分析和粒度参数垂向分布序列分析。对沉积环境变化较为敏感的粒度组分的分析发现DL-0与DL-1和DL-2井岩心沉积物敏感粒度组分的峰值有较大差别,其粒度分布范围相差较大,表明湖北岸岸边、湖中心和湖南岸的沉积物来源和沉积环境的时空差异。敏感粒度组分含量随深度变化的初步分析表明,湖北岸岸边(DL-0)和湖中心(DL-1)两个点的沉积环境较为稳定;而位于湖南岸(DL-2)点的沉积环境变化比较大,包含了5个明显的沉积波动旋回,并对达来诺尔湖由北至南进行了沉积地层分析。在达来诺尔湖水下1.5m内主要是粒径0~200μm的颗粒,岩性为粘土、粉砂和砂,以粘土和粉砂为主,随着深度的增加,黏土含量增大,粉砂和砂含量减小。 |
| 关键词: 达来诺尔湖 沉积环境 粒度分析 地层分析 |
| DOI： |
| 附件 |
| 投稿时间：2015-09-30修订日期：2015-11-04 |
| 基金项目: |
|
| Sedimentary environmental and stratigraphic analysis of the sensitive grain size components from the Dalai Nur Lake deposits, Inner Mongolia |
| YU Rui-xue, LI Chang-you, LI Wen-bao, ZHEN Zhi-lei, ZHAO Sheng-nan, ZHANG Shuai |
(1. College of Water Conservancy and Civil Engineering, Inner Mongolia Agricultural University, Hohhot 010018, Inner Mongolia, China;
2. China Railway Investment Group, Anqing 246000, Anhui, China) |
| Abstract: |
| The detailed analysis of lithology, grain size and vertical distribution of the grain-size parameters are made for the samples collected from the sites DL-0 at the northern bank, DL-1 at the central part and DL-2 at the southern bank of the Dalai Nur Lake, Inner Mongolia. The peak values of sensitive grain size components are found to be quite different, indicating the spatio-temporal differences of provenances and sedimentary environments in the above-mentioned well sites. The sites DL-0 and DL-1 indicate stable sedimentary environments while the site DL-2 indicates variable sedimentary environments in which five depositional cycles are recognized. The clay, silt and sand ranging in grain size from 0 to 200 μm occur mostly at the depth of 1.5 m below the lake level of the Dalai Nur Lake. With the increase of the depths, the clay contents increase while the silt and sand contents decrease. |
| Key words: Dalai Nur Lake sedimentary environment grain size analysis stratigraphic analysis |
