干旱区生态环境知识资源中心(Arid): 内蒙古中东部浅覆盖区荒漠化的驱动因素及其演化的地质依据

Arid

	内蒙古中东部浅覆盖区荒漠化的驱动因素及其演化的地质依据
其他题名	Driving Factors of Desertification in Thin - Cover Areas of Inner Mongolia and Their Geological Evidence
	闫岩 1; 陈英富 2; 赵国春 3; 渠洪杰 2; 陈思雨 4; 汪旭 5
来源期刊	地质与勘探
ISSN	0495-5331
出版年	2019
卷号	55 期号:2 页码:630-640
中文摘要	内蒙古中东部荒漠草原浅覆盖区因其特殊的地质地貌成为了地球科学、环境科学等研究的热点地区。在这个区域内,一方面针对水土资源和矿产资源的开发利用,从多角度、多维度对其覆盖层的揭露探索取得一定成效;另一方面又存在沙质荒漠化和生态环境退化等问题,其覆盖层结构、风沙来源、驱动因素和演化趋势等问题亟待解决。通过研究沙质荒漠化主要成因类型及其形成演变规律、成因机制和未来的发展趋势。分析认为: (1)借助青藏高原隆升影响气候变化可能造就中国北方干旱气候的大背景,新构造运动为沙质荒漠化的孕育圈闭了沉积空间。同时,构造抬升使得周围山体在外动力地质作用的推动下易于风化剥蚀沙质的沉积; (2)气候干旱和水资源匮乏是沙质荒漠环境的重要影响因素,河流的改道和变迁也是沙质荒漠化发生的动力条件。现代河流阶地和河漫滩上丰富的沙物质是现代沙质荒漠化和沙尘暴的沙源; (3)空间上半干旱典型的气候带是多动力复合侵蚀的根本原因,时间上,季节性风沙和河流的更替使得复合侵蚀作用更为突出; (4) 、人为活动对自然的改造速度是有目共睹的,不合理的人类活动是沙质荒漠化发生和发展的催化剂。在上述背景下,以地质成因的角度揭示沙质荒漠化形成与演化,为荒漠化的科学治理提供相应的地质依据。
英文摘要	Because of its special geology and geomorphology, the desert steppe in middle and eastern Inner Mongolia has become a focused subject in the research of earth and environmental sciences and other relevant fields. In this region, on one hand, in view of the exploitation and utilization of soil and water resources and mineral resources, some achievements have been made in the exploration of the overburden from various angles and dimensions; on the other hand, there are problems such as desertification of sand and degradation of the ecological environment. The cover structure, the source of wind and sand, the driving factors and the evolution trend are urgently needed to be solved. This work is concerned with the main cause types of sandy desertification, the formation and evolution of sandy desertification, genetic mechanism and future development trend. Analysis suggests that(1) the uplift of the Tibetan Plateau may be the background of the arid climate in northern China, and the neotectonic movement traps the sedimentary space for sandy desertification. At the same time,because of the tectonic uplift, the surrounding mountains are easy to be weathered and denuded by the external dynamic geological action. (2) Climate drought and lack of water resources are important influencing factors of the sandy desert environment, and river diversion and transition are also the driving conditions of sandy desertification. The rich sand material on modern river terraces and floodplains is the sand source of modern sandy desertification and sandstorms. (3) The typical semi - arid climatic zone in space is the radical cause of multi - dynamic composite erosion. In time, seasonal wind and sand and river replacement make the complex erosion more prominent. (4) The rate of transformation of nature by human activities is obvious to all, and unreasonable human activities are the catalyst for the occurrence and development of sandy desertification. Under the above background, the formation and evolution of sandy desertification are revealed from the perspective of geological origin,which provides a reliable geological basis for government decision - making and scientific control of desertification.
中文关键词	特殊地质地貌区 ; 浅覆盖区 ; 荒漠化 ; 环境变迁 ; 驱动因素 ; 内蒙古中东部
英文关键词	area of special geology and geomorphology,thin - cover area,desertification environmental change,driving factor
语种	中文
国家	中国
收录类别	CSCD
WOS类目	MINERALOGY
WOS研究方向	Mineralogy
CSCD记录号	CSCD:6467393
来源机构	北京大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/239043
作者单位	1.中国地质大学(北京)地球科学与资源学院;;中国地质调查局北京探矿工程研究所, ;;, ;;, 北京;;北京 100083;;100083, 中国; 2.中国地质调查局北京探矿工程研究所, 北京 100083, 中国; 3.中国地质大学(北京)地球科学与资源学院, 北京 100083, 中国; 4.北京大学地球科学与空间学院, 北京 100871, 中国; 5.内蒙古自治区第七地质矿产勘查院, 呼和浩特, 内蒙古 010020, 中国
推荐引用方式 GB/T 7714	闫岩,陈英富,赵国春,等. 内蒙古中东部浅覆盖区荒漠化的驱动因素及其演化的地质依据[J]. 北京大学,2019,55(2):630-640.
APA	闫岩,陈英富,赵国春,渠洪杰,陈思雨,&汪旭.(2019).内蒙古中东部浅覆盖区荒漠化的驱动因素及其演化的地质依据.地质与勘探,55(2),630-640.
MLA	闫岩,et al."内蒙古中东部浅覆盖区荒漠化的驱动因素及其演化的地质依据".地质与勘探 55.2(2019):630-640.