DOI: 10.1016/j.earscirev.2019.102937
论文题名: Higher-order gravitational potential gradients for geoscientific applications
作者: Novák P. ; Pitoňák M. ; Šprlák M. ; Tenzer R.
刊名: Earth Science Reviews
ISSN: 00128252
出版年: 2019
卷: 198 语种: 英语
中文关键词: Gradients
; Gravitational potential
; Gravity stripping
; Kernel function
; Mass density
; Newtonian integral
; Structural studies
英文关键词: accuracy assessment
; data interpretation
; gradient analysis
; gravity survey
; mapping
; numerical model
; sensitivity analysis
; spatial analysis
; spectral analysis
英文摘要: Gravity data have been applied for modelling and interpretation studies in geosciences. This contribution reviews currently observable and foreseen gravity data represented by gradients of the gravitational potential. Functional models linking 3-D mass density distribution functions to potential gradients of up to the third order are formulated using volume integrals of the Newtonian type with unitless kernel functions expressed both analytically and using infinite series of associated Legendre functions. Spatial and spectral properties of the kernel functions are analysed and sensitivity of the gradients to particular mass density distributions is studied. Two particular mass density distribution models are used in numerical experiments: a local 3-D mass density model representing shallow mass density variations and a global mass model represented by Earth's upper sediments with lateral mass density variations. Computed values of the gradients demonstrate their different sensitivities to particular mass density distributions which change with an increasing distance of the gradients from gravitating masses. Third-order gradients are particularly useful for studying near subsurface or shallow density structures such as caves, caverns, salt domes, sediment basement morphology, continental margins or buried fault systems that could be identified spatially more closely. Thus, higher-order gradients would offer an interesting tool for mass density mapping once their observability with the sufficient accuracy and resolution is realized. © 2019 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/165894
Appears in Collections: 气候变化与战略
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作者单位: NTIS – New Technologies for the Information Society, Faculty of Applied Sciences, University of West Bohemia, Technická 8, Plzeň, 306 14, Czech Republic; School of Engineering, Faculty of Engineering and Built Environment, University of Newcastle, Australia; Department of Land Surveying and Geo-Informatics, Hong Kong Polytechnic University, Hong Kong
Recommended Citation:
Novák P.,Pitoňák M.,Šprlák M.,et al. Higher-order gravitational potential gradients for geoscientific applications[J]. Earth Science Reviews,2019-01-01,198