祁连山北缘旱峡早白垩世下沟组&mdash;中沟组沉积相研究

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祁连山北缘旱峡早白垩世下沟组—中沟组沉积相研究

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中图分类号: P512.2

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Sedimentary Facies of the Lower Cretaceous Xiagou and Zhonggou Formation in Hanxia, Northern Qilian Mountain, Gansu Province, Northwest China

摘要

摘要: 祁连山北缘旱峡地区发育完整的下白垩统下沟组—中沟组沉积序列；以陆源碎屑岩为主，发育砾岩、砂岩、钙质粉砂岩和页岩等；其中砾石分选差、磨圆一般、成分以灰白色砂岩为主，砂岩成分、结构成熟度中等—差。岩石组合、沉积序列和综合沉积特征研究表明，下沟组和中沟组主要由湖泊、扇三角洲、河流等3种类型沉积相、亚相与微相类型组成，发育了一系列重力流成因的沉积类型；湖泊沉积主要发育在下沟组底部和中沟组，扇三角洲沉积分布在下沟组中—上部，中沟组发育河流沉积。研究区早白垩世中期古流向以EN向为主，早白垩世晚期以W向为主，表明沉积沉降中心也由早期的旱峡西移至研究区西南侧。在综合分析的基础上，建立了研究区下白垩统下沟组—中沟组沉积相模式。
- 祁连山北缘 /
- 旱峡 /
- 下白垩统 /
- 下沟组&mdash /
- 中沟组 /
- 沉积相
Abstract: Depositional succession of the Lower Cretaceous XiagouZhonggou Formations is widely distributed in Hanxia of the northern Qilian Mountain, and mainly composed of conglomerates, sandstones, calcareous siltstone, mudstone or shale. Gravels within conglomerates are poorly sorted and subrounded. Sandstones are characterized of poor or medium compositional maturities. Depositional succession lithological associations and facies indicate that both the Xiagou and Zhonggou Formations consist of lacustrine, fan delta or fluvial facies as well as gravity flow deposits. Lacustrine is mainly in the bottom of the Xiagou Formation and the Zhonggou Formation. Fan delta facies is dominantly in the middle and upper parts of the Xiagou Formation. Fluvial facies is common in the Zhonggou Formation. Correlation and synthesized analysis of stratigraphy, depositional facies and lithological associations in Hanxia and its adjacent areas(Changma basin and the western Jiuquan basin) illustrate that the Xiagou and Zhonggou Formations in Changma to the southwest of Hanxia, are interpreted as deposits of shallow lacustrine and meandering river facies, and then Hongliuxia to the north of Hanxia was shallow lacustrine environment, Xinminpu(to the northeast of Hanxia), however, is mainly and meandering river facies. Based on the huge stratigraphic thickness in Hanxia than the mentioned three areas else and deepening shallow lacustrine depositional subfacies as well, was regarded as a depocenter of the Jiuxi basin of midlate Early Cretaceous. Paleocurrent reconstruction show northeastwards in the Xiagou Formation and westward in the Zhonggou Formation. A dispositional model of the Lower Cretaceous Xiagou and Zhonggou Formations is synthesized finally. 
- Northen Qilian Mountain /
- the Hanxia area /
- the Lower Cretaceous /
- XiagouZhonggou Formation /
- Sedimentary facies /

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[1]	梁钊, 云玉攀, 魏浩. 快速沉积引发的软沉积物变形构造特征 . 沉积学报, 2023, 41(2): 450-458. doi: 10.14027/j.issn.1000-0550.2021.094
[2]	熊连桥, 李建平, 谢晓军, 蔡露露, 廖计华, 许晓明. 湖相碳酸盐岩沉积微相类型及沉积模式 . 沉积学报, 2021, 39(3): 767-780. doi: 10.14027/j.issn.1000-0550.2020.025
[3]	孙福宁, 杨仁超, 樊爱萍, 尤靖茜. 灵山岛下白垩统软沉积物变形构造类型划分及其地质意义 . 沉积学报, 2018, 36(6): 1105-1118. doi: 10.14027/j.issn.1000-0550.2018.085
[4]	陈虹宇, 胡广, 胡文瑄, 罗婷婷, 王学寅, 刘友祥. 浙江石浦下白垩统石浦群沉积相、层序及相对海平面变化 . 沉积学报, 2018, 36(2): 243-256. doi: 10.14027/j.issn.1000-0550.2018.032
[5]	李婷婷, 朱如凯, 白斌, 王崇孝, 李铁峰. 混积岩储层特征——以酒泉盆地青西凹陷下白垩统混积岩为例 . 沉积学报, 2015, 33(2): 376-384. doi: 10.14027/j.cnki.cjxb.2015.02.017
[6]	王朋, 柳广弟, 曹喆, 苏惠, 牛子铖, 张婧雅, 罗文斌. 查干凹陷下白垩统稠油地球化学特征及成因分析 . 沉积学报, 2015, 33(6): 1265-1274. doi: 10.14027/j.cnki.cjxb.2015.06.019
[7]	王星星, 朱筱敏, 张明君, 潘荣, 吴陈冰洁, 张久强. 洪浩尔舒特凹陷下白垩统近岸水下扇沉积特征 . 沉积学报, 2015, 33(3): 568-577. doi: 10.14027/j.cnki.cjxb.2015.03.015
[8]	高志勇, 冯佳睿, 周川闽, 崔京钢, 李小陪, 赵雪松, 郭美丽, 吴昊. 干旱气候环境下季节性河流沉积特征——以库车河剖面下白垩统为例 . 沉积学报, 2014, 32(6): 1060-1071.
[9]	. 二连盆地巴音都兰凹陷下白垩统湖相云质岩成因研究 . 沉积学报, 2014, 32(3): 560-567.
[10]	. 库车前陆盆地上侏罗统—下白垩统砾岩特征与构造演化关系 . 沉积学报, 2013, 31(6): 980-993.
[11]	. 松辽盆地东南缘层序地层与沉积体系配置及演化——以梨树断陷西北部营城组地层为例 . 沉积学报, 2013, 31(1): 67-76.
[12]	. 藏南日喀则弧前盆地帕达那组沉积相分析 . 沉积学报, 2012, 30(4): 619-628.
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[14]	王锋. 阿曼Daleel油田下白垩统Shuaiba组上段碳酸盐岩沉积相模式 . 沉积学报, 2007, 25(2): 192-200.
[15]	张成, 李春柏, 楚美娟, 史淑玲. 乌尔逊凹陷下白垩统高频层序特征及其控制因素分析 . 沉积学报, 2005, 23(4): 657-663.
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文章访问数: 2134
HTML全文浏览量: 2
PDF下载量: 986
被引次数: 0

祁连山北缘旱峡早白垩世下沟组—中沟组沉积相研究

刊出日期: 2013-04-10

中图分类号: P512.2

关键词:

旱峡 /

中沟组 /

摘要: 祁连山北缘旱峡地区发育完整的下白垩统下沟组—中沟组沉积序列；以陆源碎屑岩为主，发育砾岩、砂岩、钙质粉砂岩和页岩等；其中砾石分选差、磨圆一般、成分以灰白色砂岩为主，砂岩成分、结构成熟度中等—差。岩石组合、沉积序列和综合沉积特征研究表明，下沟组和中沟组主要由湖泊、扇三角洲、河流等3种类型沉积相、亚相与微相类型组成，发育了一系列重力流成因的沉积类型；湖泊沉积主要发育在下沟组底部和中沟组，扇三角洲沉积分布在下沟组中—上部，中沟组发育河流沉积。研究区早白垩世中期古流向以EN向为主，早白垩世晚期以W向为主，表明沉积沉降中心也由早期的旱峡西移至研究区西南侧。在综合分析的基础上，建立了研究区下白垩统下沟组—中沟组沉积相模式。

Sedimentary Facies of the Lower Cretaceous Xiagou and Zhonggou Formation in Hanxia, Northern Qilian Mountain, Gansu Province, Northwest China

Publish Date: 2013-04-10

Keywords:

Abstract: Depositional succession of the Lower Cretaceous XiagouZhonggou Formations is widely distributed in Hanxia of the northern Qilian Mountain, and mainly composed of conglomerates, sandstones, calcareous siltstone, mudstone or shale. Gravels within conglomerates are poorly sorted and subrounded. Sandstones are characterized of poor or medium compositional maturities. Depositional succession lithological associations and facies indicate that both the Xiagou and Zhonggou Formations consist of lacustrine, fan delta or fluvial facies as well as gravity flow deposits. Lacustrine is mainly in the bottom of the Xiagou Formation and the Zhonggou Formation. Fan delta facies is dominantly in the middle and upper parts of the Xiagou Formation. Fluvial facies is common in the Zhonggou Formation. Correlation and synthesized analysis of stratigraphy, depositional facies and lithological associations in Hanxia and its adjacent areas(Changma basin and the western Jiuquan basin) illustrate that the Xiagou and Zhonggou Formations in Changma to the southwest of Hanxia, are interpreted as deposits of shallow lacustrine and meandering river facies, and then Hongliuxia to the north of Hanxia was shallow lacustrine environment, Xinminpu(to the northeast of Hanxia), however, is mainly and meandering river facies. Based on the huge stratigraphic thickness in Hanxia than the mentioned three areas else and deepening shallow lacustrine depositional subfacies as well, was regarded as a depocenter of the Jiuxi basin of midlate Early Cretaceous. Paleocurrent reconstruction show northeastwards in the Xiagou Formation and westward in the Zhonggou Formation. A dispositional model of the Lower Cretaceous Xiagou and Zhonggou Formations is synthesized finally. 

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祁连山北缘旱峡早白垩世下沟组—中沟组沉积相研究

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Sedimentary Facies of the Lower Cretaceous Xiagou and Zhonggou Formation in Hanxia, Northern Qilian Mountain, Gansu Province, Northwest China

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祁连山北缘旱峡早白垩世下沟组—中沟组沉积相研究

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Sedimentary Facies of the Lower Cretaceous Xiagou and Zhonggou Formation in Hanxia, Northern Qilian Mountain, Gansu Province, Northwest China

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祁连山北缘旱峡早白垩世下沟组—中沟组沉积相研究

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Sedimentary Facies of the Lower Cretaceous Xiagou and Zhonggou Formation in Hanxia, Northern Qilian Mountain, Gansu Province, Northwest China

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出版历程

目录

祁连山北缘旱峡早白垩世下沟组—中沟组沉积相研究

English Abstract

Sedimentary Facies of the Lower Cretaceous Xiagou and Zhonggou Formation in Hanxia, Northern Qilian Mountain, Gansu Province, Northwest China

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目录

友情链接

期刊在线

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