作者:Qiu, YD (Qiu, Yaodong)^{[ 1 ]} ; Wang, ZT (Wang, Zhengtao)^{[ 1 ]} ; Jiang, WP (Jiang, Weiping)^{[ 2 ]} ;Zhang, BB (Zhang, Bingbing)^{[ 1 ]} ; Li, FP (Li, Fupeng)^{[ 1 ]} ; Guo, F (Guo, Fei)^{[ 1 ]}

SENSORS

卷: 17 期: 2 DOI: 10.3390/s17020238

出版年: FEB 2017

摘要

CHAMP and Swarm satellite magnetic data are combined to establish the lithospheric magnetic field over the Tibetan Plateau at satellite altitude by using zonal revised spherical cap harmonic analysis (R-SCHA). These data are integrated with geological structures data to analyze the relationship between magnetic anomaly signals and large-scale geological tectonic over the Tibetan Plateau and to explore the active tectonic region based on the angle of the magnetic anomaly. Results show that the model fitting error is small for a layer 250-500 km high, and the RMSE of the horizontal and radial geomagnetic components is better than 0.3 nT. The proposed model can accurately describe medium-to long-scale lithospheric magnetic anomalies. Analysis indicates that a negative magnetic anomaly in the Tibetan Plateau significantly differs with a positive magnetic anomaly in the surrounding area, and the boundary of the positive and negative regions is generally consistent with the geological tectonic boundary in the plateau region. Significant differences exist between the basement structures of the hinterland of the plateau and the surrounding area. The magnetic anomaly in the Central and Western Tibetan Plateau shows an east-west trend, which is identical to the direction of the geological structures. The magnetic anomaly in the eastern part is arc-shaped and extends along the northeast direction. Its direction is significantly different from the trend of the geological structures. The strongest negative anomaly is located in the Himalaya block, with a central strength of up to 9 nT at a height of 300 km. The presence of a strong negative anomaly implies that the Curie isotherm in this area is relatively shallow and deep geological tectonic activity may exist.

关键词

作者关键词:Lithospheric Magnetic Field; geological structures; Swarm satellite; CHAMP satellite; R-SCHA

KeyWords Plus:CAP HARMONIC-ANALYSIS; HEAT-FLUX ANOMALIES; GEOMAGNETIC-FIELD;ADJACENT AREAS; CRUSTAL; CHINA; CONSTELLATION; PRODUCTS; MODELS; SCARF

作者信息

通讯作者地址: Jiang, WP (通讯作者)

地址:

电子邮件地址:ydqiu@whu.edu.cn; ztwang@sgg.whu.edu.cn; wpjiang@whu.edu.cn;bbzhang@whu.edu.cn; fpli@whu.edu.cn; fguo@whu.edu.cn

基金资助致谢

查看基金资助信息

出版商

MDPI AG, ST ALBAN-ANLAGE 66, CH-4052 BASEL, SWITZERLAND

类别/分类

研究方向:Chemistry; Electrochemistry; Instruments & Instrumentation

Web of Science类别:Chemistry, Analytical; Electrochemistry; Instruments & Instrumentation

文献信息

文献类型:Article

语种:English

入藏号: WOS:000395482700022

ISSN: 1424-8220

期刊信息

· Impact Factor (影响因子): 2.033