Grain-size distribution characteristics and sedimentary environment of Silurian- -Devonian sandstone in Keping area of Xinjiang Province |
| |
| Authors: | YAN Kun MA Wei LIU Xiaodan LI Na |
| |
| Institution: | The 7th Gold Detachment of People’s Armed Police, Yantai 264000, China |
| |
| Abstract: | In order to systematically study the evolution characteristics of Silurian- -Devonian sedimentary environment in Keping area, the authors analyzed the sandstone in detail through sedimentary, stratigraphic and grain size analysis. Four sedimentary environments, including river-controlled delta, tidal-controlled delta, tidal flat and coast, were identified, with their own unique grain-size characteristics and probability cumulative curves. River-controlled delta is featured with typical two stages, hop-suspension transition and low-skew multistage. Fan delta is featured with the upper arch arc. Tidal-controlled delta is featured with typical three stages and multistage. Coastal area is feotured with high oblique two stages and high oblique multistage. The sedimentary environment gradually changed from wet river-controlled delta to dry coastal deposit from Silurian to Devonian, with the increasing maturity of sandstone. This indicates that Keping area was gradually away from provenance area and in the background of structural stability. |
| |
| Keywords: | Keping area clastic rocks grain-size analysis sedimentary environment |
|
| 点击此处可从《》浏览原始摘要信息 |
| 点击此处可从《》下载免费的PDF全文 |
|
