气候变化领域集成服务门户(CCPortal): Estimation of Depth to Bottom of Magnetic Sources Using Spectral Methods: Application on Iran's Aeromagnetic Data

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DOI	10.1029/2019JB018119
	Estimation of Depth to Bottom of Magnetic Sources Using Spectral Methods: Application on Iran's Aeromagnetic Data
	Kumar R.; Bansal A.R.; Ghods A.
发表日期	2020
ISSN	21699313
卷号	125 期号:3
英文摘要	The effect of window size while estimating the depth to bottom of magnetic sources (DBMS) is examined on the synthetic 2-D magnetic field data. The data are generated for 3-D fractal magnetization models assuming different combinations of depth to the top and bottom of magnetic sources. The depths are estimated assuming an uncorrelated and correlated random distribution of sources. The depths to the top estimated for fractal distribution of sources are found within 70% of the true values for all window sizes, whereas the values for the uncorrelated random distributions are far from the real depths. The DBMS for the correlated random distribution of sources are estimated within 70–80% of the true values for the window sizes of 5 times or more of the targeted depths. The modified centroid method is found to provide better estimations as compared to scaling-spectral peak modeling. The modified centroid method is applied to the aeromagnetic data of Iran to estimate the DBMS using a window size of 200 × 200 km2. The shallow DBMS between 12 and 20 km are obtained for the Quaternary Sabalan and Sahand volcanoes to the NW of Iran, the central and NE of central Iran, the central Zagros, NW of Tabas block, and the south of the Lut Block. The deepest DBMS of the order of 40 km is found in the Makran. The rest of Iranian Plateau is characterized by DBMS of 20 to 30 km. The shallow DBMS are found in correlation with the depth of the Ophiolites. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	aeromagnetic; depth to the bottom of magnetic sources (DBMS); modified centroid method; spectral peak modeling; window size
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187919
作者单位	CSIR-National Geophysical Research Institute, Hyderabad, India; Now at Shillong Geophysical Research Centre (IIG Mumbai), Shillong, India; Department of Earth Sciences, Institute for Advanced Studies in Basic Sciences, Zanjan, Iran
推荐引用方式 GB/T 7714	Kumar R.,Bansal A.R.,Ghods A.. Estimation of Depth to Bottom of Magnetic Sources Using Spectral Methods: Application on Iran's Aeromagnetic Data[J],2020,125(3).
APA	Kumar R.,Bansal A.R.,&Ghods A..(2020).Estimation of Depth to Bottom of Magnetic Sources Using Spectral Methods: Application on Iran's Aeromagnetic Data.Journal of Geophysical Research: Solid Earth,125(3).
MLA	Kumar R.,et al."Estimation of Depth to Bottom of Magnetic Sources Using Spectral Methods: Application on Iran's Aeromagnetic Data".Journal of Geophysical Research: Solid Earth 125.3(2020).