新疆柯坪地区志留系—泥盆系砂岩粒度分布特征及沉积环境

doi:10.19388/j.zgdzdc.2020.04.10

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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.

Key words： Keping area clastic rocks grain-size analysis sedimentary environment

Received: 25 June 2019

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	TE121.31

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	Articles by authors
	YAN Kun
	MA Wei
	LIU Xiaodan
	LI Na

Cite this article:

YAN Kun,MA Wei,LIU Xiaodan, et al. Grain-size distribution characteristics and sedimentary environment of Silurian- -Devonian sandstone in Keping area of Xinjiang Province[J]. , 2020, 7(4): 76-84.

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http://www.zgdzdcbjb.com/EN/10.19388/j.zgdzdc.2020.04.10 OR http://www.zgdzdcbjb.com/EN/Y2020/V7/I4/76

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