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江西抚崇盆地晚白垩世-古新世莲荷组砾石砾组分析

梁伟 陈留勤 郭福生 蒋兴波

梁伟, 陈留勤, 郭福生, 等, 2013. 江西抚崇盆地晚白垩世-古新世莲荷组砾石砾组分析. 地质力学学报, 19 (1): 35-44.
引用本文: 梁伟, 陈留勤, 郭福生, 等, 2013. 江西抚崇盆地晚白垩世-古新世莲荷组砾石砾组分析. 地质力学学报, 19 (1): 35-44.
LIANG Wei, CHEN Liu-qin, GUO Fu-sheng, et al., 2013. ANALYSIS ON GRAVEL FABRIC OF THE LATE CRETACEOUS TO THE PALEOCENE LIANHE FORMATION IN FUZHOU-CHONGREN BASIN, JIANGXI. Journal of Geomechanics, 19 (1): 35-44.
Citation: LIANG Wei, CHEN Liu-qin, GUO Fu-sheng, et al., 2013. ANALYSIS ON GRAVEL FABRIC OF THE LATE CRETACEOUS TO THE PALEOCENE LIANHE FORMATION IN FUZHOU-CHONGREN BASIN, JIANGXI. Journal of Geomechanics, 19 (1): 35-44.

江西抚崇盆地晚白垩世-古新世莲荷组砾石砾组分析

基金项目: 

博士后科研启动基金项目 DHBHK1102

中国地质调查局工作项目 1212011120836

东华理工大学核资源与环境教育部重点实验室开放基金项目 NRE1210

江西省教育厅科学技术研究项目 GJJ13438

详细信息
    作者简介:

    梁伟(1988-), 男, 宁夏回族自治区吴忠市人, 硕士研究生, 地质工程专业。E-mail:leungwai1012@163.com

    通讯作者:

    郭福生(1962-), 男, 硕士, 教授, 主要从事沉积学与区域地质调查研究工作。E-mail:fxguo@263.com

  • 中图分类号: P588.21

ANALYSIS ON GRAVEL FABRIC OF THE LATE CRETACEOUS TO THE PALEOCENE LIANHE FORMATION IN FUZHOU-CHONGREN BASIN, JIANGXI

  • 摘要: 赣杭构造带中、新生代红色粗碎屑岩发育,对红层中砾石组构分析有助于理解红盆形成、演化过程。运用砾组分析方法,对江西抚崇盆地晚白垩世-古新世莲荷组砾岩层的砾性、砾度、砾态及砾向进行分析,并在此基础上对研究区红盆砾岩的物质来源、成因和形成条件等进行综合判断。研究结果表明,莲荷组砾岩为晚白垩世-古新世半干旱-干旱条件下的一套冲积扇相粗碎屑沉积,具有多物源和快速堆积的特点。总体上,砾石成分复杂,风选程度较差,呈次棱角-次圆状,风化程度较低。盆地不同地区砾石成分组合特征具有明显差别,反映了盆地周围复杂的物源供应条件。根据盆地周边出露基岩地层和扁平状砾石产状统计玫瑰花图判断,莲荷组沉积时期,物源主要来自盆地内部的基岩地层以及盆地西南部、西部和东北部。

     

  • 图  1  江西抚崇盆地地质简图及砾石统计测点位置

    Figure  1.  Geological sketch of Fuzhou-Chongren basin in Jiangxi and outcrops for gravel statistics

    图  2  莲荷组砾岩地层野外露头特征

    Figure  2.  Outcrop characteristics of the conglomerates of Lianhe Formation

    图  3  莲荷组砾岩层各轴砾径累积频率曲线图

    Figure  3.  The accumulative frequency curves of gravel axes of the conglomerate layers of Lianhe Formation

    图  4  莲荷组砾岩层a轴砾径频率分布柱状图

    Figure  4.  The histogram map of a-axon size-frequency distribution of the conglomerate layers of Lianhe Formation

    图  5  莲荷组砾岩砾石ab面倾向玫瑰花图

    Figure  5.  The rosette diagram of gravel primeval ab-plane of the conglomerate layers of Lianhe Formation

    表  1  莲荷组砾岩地层砾石成分统计

    Table  1.   Gravel compositional features of the conglomerate layers of Lianhe Formation

    表  2  福克和沃德砾度分布参数计算公式[16]

    Table  2.   The calculation formula of Grain size distribution parameters by Folk and Ward[16]

    表  3  莲荷组砾石砾度特征统计表

    Table  3.   The granulometric features of the conglomerate layers of Lianhe Formation

    表  4  莲荷组砾石砾态特征

    Table  4.   The psephitic features of the conglomerate layers of Lianhe Formation

    表  5  莲荷组不同岩性砾石风化程度占比

    Table  5.   Percentage of weathering degrees of different lithologic gravels from Lianhe Formation

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  • 收稿日期:  2012-11-05
  • 刊出日期:  2013-06-01

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