干旱区生态环境知识资源中心(Arid): 鄂尔多斯盆地中生代晚期以来大地热流的变化及其对生态环境格局和演变的影响

Arid

	鄂尔多斯盆地中生代晚期以来大地热流的变化及其对生态环境格局和演变的影响
其他题名	Change of Terrestrial Heat Flow in Ordos Basin since Late Mesozoic and its Effects on the Pattern and Evolution of the Ecologic Environment
	匡耀求; 黄宁生; 胡振宇; 吴志峰; 刘宇
来源期刊	矿物岩石地球化学通报
ISSN	1007-2802
出版年	2004
卷号	23 期号:4 页码:318-325
中文摘要	鄂尔多斯盆地的西北部、东北部和南部三个区域现今大地热流平均值分别为56.3、67.3和65.3mW/m~2,对应的生态环境格局也有明显的差异.研究表明,大地热流每增加4～5 mW/m~2可使年均地表温度升高约1℃,使最低月均地表温度升高2℃以上.鄂尔多斯盆地东北部的平均大地热流比西北部高出11mW/m~2,东北部年均地表温度可能比西北部高出2～3℃,其最低月均地表温度可能比西北部高出4～6℃.西北部的大地热流平均值已经低于维持地表生态系统延续所需大地热流的临界值(57 mW/m~2),其自然生态系统整体上已经处于脆弱境地;东北部和南部的大地热流均大于57 mW/m~2,自然生态系统均尚较稳健.东北部的沙漠化可能是风沙侵入的结果,其生态应该是可以恢复的.整个西北部作为一个整体看,72万年以前大地热流就已衰减到临界值以下,区域生态系统渐趋脆弱,开始整体上向荒漠化演变.
英文摘要	The Ordos Basin can he divided into three parts as Northwestern part, Northeastern part and Southern part,and their average terrestrial heat flow are estimated to be 56. 3 .67. 3 and 65.3 mW/m~2, respectively, which respond to distinctive ecologic environment patterns. The annual mean ground temperature will raise about 1 C and the minimum mean month ground temperature will raise more than 2 ℃ as the terrestrial heat flow in the region in-crease 4--5 mW/m~2. The average terrestrial heat flow in the Northeastern part of Ordos Basin is 11 mW/m~2 higher than that in the Northwestern part. Accordingly, the ground temperature in Northeastern part should be 2～3 ℃ higher than that in the Northwestern part, and the minimum mean month ground temperature should be 4 ～ 6 ℃ higher than that in the Northwestern part. The average terrestrial heat flow in the Northwestern part has become lower than the critical value for maintaining sustainable development of the ecologic system (57 mW/m~2) , and its natural ecologic system is in a weak condition as a whole; while the average terrestrial heat flow in the Northeastern part and Southern part are greater than 57 mW/m~2 , their natural ecologic system are still robust. The desertifica-tion now in the Northeastern part may result from aggression of wind and sand, where the ecologic system could be restored to some extent. The ecologic system in the Northwestern part as a whole had become weak and begun to develop toward desertification as the terrestrial heat flow was declining to lower than the critical value 720 thousand years ago.
中文关键词	大地热流 ; 生态环境 ; 地表温度 ; 鄂尔多斯盆地 ; 荒漠化
英文关键词	terrestrial heat flow ecologic environment ground temperature Ordos Basin desertification
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOSCIENCES MULTIDISCIPLINARY
WOS研究方向	Geology
CSCD记录号	CSCD:1678870
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/205230
作者单位	中国科学院,广州地球化学研究所, 边缘海地质重点实验室, 广州, 广东 510640, 中国
推荐引用方式 GB/T 7714	匡耀求,黄宁生,胡振宇,等. 鄂尔多斯盆地中生代晚期以来大地热流的变化及其对生态环境格局和演变的影响[J],2004,23(4):318-325.
APA	匡耀求,黄宁生,胡振宇,吴志峰,&刘宇.(2004).鄂尔多斯盆地中生代晚期以来大地热流的变化及其对生态环境格局和演变的影响.矿物岩石地球化学通报,23(4),318-325.
MLA	匡耀求,et al."鄂尔多斯盆地中生代晚期以来大地热流的变化及其对生态环境格局和演变的影响".矿物岩石地球化学通报 23.4(2004):318-325.