干旱区生态环境知识资源中心(Arid): 江西抚崇盆地晚白垩世古新世莲荷组砾石砾组分析

Arid

	江西抚崇盆地晚白垩世古新世莲荷组砾石砾组分析
其他题名	ANALYSIS ON GRAVEL FABRIC OF THE LATE CRETACEOUS TO THE PALEOCENE LIANHE FORMATION IN FUZHOU-CHONGREN BASIN,JIANGXI
	梁伟 1; 陈留勤 2; 郭福生 1; 蒋兴波 1
来源期刊	地质力学学报
ISSN	1006-6616
出版年	2013
卷号	19 期号:1 页码:35-44
中文摘要	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。
英文摘要	Analyzing the gravel fabric of red layers of the Cenozoic in Ganhang tectonic belt is helpful to understand the formation and evolution of the red basin. Using analysis method to study the composition,particle size,shape and preferred orientations of conglomerate layers of the Late Cretaceous to the Paleocene Lianhe Formation in Fuzhou-Chongren basin. The study can estimate the source,origin and formation conditions of these gravels. The result shows that the gravels of the Late Cretaceous to the Paleocene Lianhe Formation were the products of alluvial fan facies in semiarid to arid climate condition. The gravel deposits are featured by multi-source and rapid accumulation,poor sorting, subangular to subrounded and low degree of weathering. The composition assemblages of gravels of different areas in the basin are obviously different,which reflects complex provenance condition around the basin. Based on the bed rock strata characteristics and the rose diagrams from the planes of maximum flat (ab-planes) of gravals,the sediment source was mainly from northern,northwestern and western parts of the basin.
中文关键词	砾组分析 ; 莲荷组 ; 抚崇盆地 ; 赣杭构造带 ; 红盆
英文关键词	fabric analysis of gravel Lianhe Formation Fuzhou-Chongren basin Ganhang tectonic belt red basin
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOLOGY
WOS研究方向	Geology
CSCD记录号	CSCD:4827289
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/229400
作者单位	1.东华理工大学地球科学学院, 南昌, 江西 330013, 中国; 2.东华理工大学地球科学学院, 江西省核资源与环境重点实验室, 南昌, 江西 330013, 中国
推荐引用方式 GB/T 7714	梁伟,陈留勤,郭福生,等. 江西抚崇盆地晚白垩世古新世莲荷组砾石砾组分析[J],2013,19(1):35-44.
APA	梁伟,陈留勤,郭福生,&蒋兴波.(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.
MLA	梁伟,et al."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(2013):35-44.