干旱区生态环境知识资源中心(Arid): 云南西北部丽江剑川地区古近纪宝相寺组石英砂颗粒表面特征

Arid

	云南西北部丽江剑川地区古近纪宝相寺组石英砂颗粒表面特征
其他题名	Surface microscopic characteristics of quartz sand grains in the Paleogene Baoxiangsi Formation of Lijiang-Jianchuan area,northwestern Yunnan
	崔晓庄 1; 江新胜 2; 伍皓 2; 熊国庆 2
来源期刊	地质通报
ISSN	1671-2552
出版年	2011
卷号	30 期号:8 页码:1238-1244
中文摘要	石英砂具有丰富的颗粒表面特征,是判别沉积环境的重要标志。利用扫描电镜对云南丽江剑川地区宝相寺组(E2b)的石英砂颗粒表面特征进行了系统分析:下部样品具水成特征,中部样品具风成特征,上部样品则具经水流改造后的风成特征。结合野外观察结果,从宝相寺组石英砂颗粒表面特征的变化规律可以看出,下部为近源洪积环境、中部为风成沙丘环境、上部为湖泊环境。其中中部样品的石英砂磨圆、分选极好,普遍具有标准的碟形、新月形撞击坑和毛玻璃化表面,是典型的沙漠砂沉积。
英文摘要	Quartz sand grains have a variety of surface characteristics,which could be used as the main indicators of their depositional environment.In the present study,the surface characteristics of quartz sand grains were systematically analyzed on the basis of the samples from varying levels of the Baoxiangsi Formation(E2b)in Lijiang-Jianchuan area,Yunnan Province,by using electronic scan microscope.The results show that the grain surfaces of the samples from the lower part of the Baoxiangsi Formation have aqueous characteristics,those from the middle part have eolian characteristics,and those from the upper part have reworked eolian characteristics.It is thus concluded that the lower part is a proximal diluvial environment,the middle part is an eolian dune environment,and the upper part is a lake environment.Moreover,the quartz sand grains of the samples from the middle part are well sorted and rounded,and commonly have standard dish-shaped impact scars,crescent-shaped impact scars and frosted surface,suggesting typical desert sand sediments.
中文关键词	丽江剑川地区 ; 古近纪 ; 宝相寺组 ; 石英颗粒表面特征 ; 古沙漠
英文关键词	Lijiang-Jianchuan area Paleogene Baoxiangsi Formation surface features of quartz sand grains desert
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:4267773
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/226323
作者单位	1.中国地质科学院, 北京 100037, 中国; 2.中国地质调查局成都地质矿产研究所, 成都, 四川 610081, 中国
推荐引用方式 GB/T 7714	崔晓庄,江新胜,伍皓,等. 云南西北部丽江剑川地区古近纪宝相寺组石英砂颗粒表面特征[J],2011,30(8):1238-1244.
APA	崔晓庄,江新胜,伍皓,&熊国庆.(2011).云南西北部丽江剑川地区古近纪宝相寺组石英砂颗粒表面特征.地质通报,30(8),1238-1244.
MLA	崔晓庄,et al."云南西北部丽江剑川地区古近纪宝相寺组石英砂颗粒表面特征".地质通报 30.8(2011):1238-1244.