干旱区生态环境知识资源中心(Arid): 陕西渭河地区新生代地层及沉积环境演化

Arid

	陕西渭河地区新生代地层及沉积环境演化
其他题名	CENOZOIC STRATIGRAPHY AND PALEOENVIRONMENTS IN THE WEIHE AREA, SHAANXI PROVINCE
	李智超 1; 李文厚 1; 李永项 1; 李玉宏 2; 韩伟 2
来源期刊	地层学杂志
ISSN	0253-4959
出版年	2016
卷号	40 期号:2 页码:168-178
中文摘要	渭河地区新生代地层十分发育,前人做了大量工作,但详细的地层划分一直存在不同认识。随着近些年渭河地区研究工作的不断进展,结合前人已有的成果,通过大量野外剖面实测及室内资料的汇总,对渭河地区新生代地层做了归纳,划分如下:古近系始新统红河组;渐新统白鹿塬组;新近系中新统冷水沟组、寇家村组、灞河组;上新统游河组;第四系更新统三门组、泄湖组、乾县组及全新统半坡组。渭河地区由始新世开始沉积,早期气候比较炎热干燥,渐新世逐渐变得温暖湿润,至渐新世晚期气候干冷;中新世早期湖泊广布,环境相对湿润.晚期逐渐变得干暖,但依然存在干冷环境;上新世整体比较温暖湿润,但后期气候逐渐转凉;至第四纪随着冰期到来,整体气候显著变冷、变干,半湿润半干旱气候形成。
英文摘要	Cenozoic strata in the Weihe area of Shaanxi Province are well developed. However, Cenozoic stratigraphic classification and correlation in the Weihe area is controversial. Based on new field data and previously published data,Cenozoic strata in the Weihe area can be divided as follow: the Eocene Honghe Formation; Oligocene Bailuyuan Formation; Miocene Lengshuigou Formation, Koujiacun Formation, Bahe Formation; Pliocene Youhe Formation, Pleistocene Sanmen Formation, Xiehu Formation, Qianxian Formation; Holocene Banpo Formation. The Weihe area was characterized by extremely arid and hot weather in early Eocene, but the climate gradually became mild and humid in the Oligocene and then dry and cold in the late stage of late Oligocene. Lakes were distributed widely in early Miocene, when the climate was relatively humid and gradually became dry and warm with intervals of dry and cold environment in the late Miocene. The Pliocene was characterized by overall warmer climate,with gradual cooling toward late Pliocene. As the ice age arrived in the Quaternary Period,the climate turned cold and dry, and this change contributed to the semiarid and subhumid environment in this area.
中文关键词	岩石地层 ; 地层划分 ; 沉积环境 ; 气候变化 ; 新生代 ; 渭河地区 ; 陕西
英文关键词	lithostratigraphy stratigraphic classification sedimentary environment climate change Cenozoic Weihe Area Shaanxi
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:5688792
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/234041
作者单位	1.西北大学地质学, 大陆动力学国家重点实验室, 西安, 陕西 710069, 中国; 2.西安地址矿产研究所, 西安, 陕西 710054, 中国
推荐引用方式 GB/T 7714	李智超,李文厚,李永项,等. 陕西渭河地区新生代地层及沉积环境演化[J],2016,40(2):168-178.
APA	李智超,李文厚,李永项,李玉宏,&韩伟.(2016).陕西渭河地区新生代地层及沉积环境演化.地层学杂志,40(2),168-178.
MLA	李智超,et al."陕西渭河地区新生代地层及沉积环境演化".地层学杂志 40.2(2016):168-178.