干旱区生态环境知识资源中心(Arid): 准噶尔盆地南缘黄土磁化率变化规律及影响因素

Arid

	准噶尔盆地南缘黄土磁化率变化规律及影响因素
其他题名	Magnetic susceptibility variation of loess deposit in the Southern Junggar Basin and its influence factors
	温仰磊; 王友郡; 柳加波; 赵爽; 李冠华; 贾佳; 夏敦胜
来源期刊	地球环境学报
ISSN	1674-9901
出版年	2014
卷号	5 期号:2 页码:85-92
中文摘要	准噶尔盆地南缘柏杨河典型风成黄土剖面的岩石磁学与粒度研究结果指示该地区黄土磁性矿物以亚铁磁性矿物为主,主要载磁矿物为粗粒原生强磁性矿物,同时含有少量细粒磁性矿物,磁性矿物含量远低于黄土高原黄土。磁性矿物磁晶粒度以假单畴和多畴(PSD/MD)为主,后期成壤过程对磁性矿物颗粒的改造作用很小。柏杨河黄土磁化率增强机制较为复杂,磁学与粒度的曲线对比表明风动力强度对含磁性矿物较粗颗粒具有分选作用,是导致磁化率变化的重要因素,但二者的低相关性又暗示了风动力强度在解释磁化率增强机制中的局限性。古尔班通古特沙漠在末次间冰期以来的收缩与扩张导致的物源变化可能是影响磁化率变化的又一重要因素。
英文摘要	Rock magnetic parameters and grain sizes were measured and analyzed in a loess section in the Southern Junggar Basin. The results show that the content of magnetic mineral of the section is much lower than Loess Plateau of China, and the dominant magnetic mineral is ferromagnetic. Native strong magnetic mineral is the primary cause of magnetic susceptibility rise. The analysis of grain size of magnetic minerals indicates that the property of the loess is dominated by PSD/MD magnetite. The change mechanism of magnetic susceptibility of Xinjiang Loess is complex. Comparison of magnetic susceptibility curves and grain size curves show that wind is the important reason leading to magnetic susceptibility changes, but not the only one. The changing of provenance may be the other reason leading to magnetic susceptibility changes, because the expansion and contraction of Gurbantunggut Desert would be occur when the climate changes since the last interglacial period.
中文关键词	准噶尔盆地 ; 柏杨河黄土 ; 磁化率 ; 粒度
英文关键词	Junggar Basin Baiyanghe loess magnetic susceptibility grain size
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:5291643
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/230950
作者单位	兰州大学,干旱环境与气候变化协同创新中心, 西部环境教育部重点实验室, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	温仰磊,王友郡,柳加波,等. 准噶尔盆地南缘黄土磁化率变化规律及影响因素[J]. 兰州大学,2014,5(2):85-92.
APA	温仰磊.,王友郡.,柳加波.,赵爽.,李冠华.,...&夏敦胜.(2014).准噶尔盆地南缘黄土磁化率变化规律及影响因素.地球环境学报,5(2),85-92.
MLA	温仰磊,et al."准噶尔盆地南缘黄土磁化率变化规律及影响因素".地球环境学报 5.2(2014):85-92.