基于深度变化的磁场正则化下延方法研究的综述报告-豆柴文库

您所在位置：网站首页 / 基于深度变化的磁场正则化下延方法研究的综述报告.docx / 文档详情

在线预览结束，喜欢就下载吧，查找使用更方便

5 金币

下载文档

/ 2

下载提示

如果您无法下载资料，请参考说明：

1、部分资料下载需要金币，请确保您的账户上有足够的金币

2、已购买过的文档，再次下载不重复扣费

3、资料包下载后请先用软件解压，在使用对应软件打开

文本预览

基于深度变化的磁场正则化下延方法研究的综述报告
Introduction
Inmanygeophysicalsurveys,magneticdataisoneofthemostcommonlyuseddatatypes.Magneticdataiscommonlyusedinmineralexploration,environmentalmonitoring,andgeologicalmapping.However,thedataobtainedfrommagneticsurveysisoftenaffectedbynoise,whichcanmakeitdifficulttointerpret.Therefore,theuseofmagneticfieldregularizationinversionmethodsisimportanttoobtainreliableandaccurateresults.Oneofthemethodsthatisgainingpopularityistheuseofdepthextensionbasedondepthchangesonmagneticfields.Inthisreport,weprovideareviewofthestudiesthathavebeenconductedonthismethod.
Theory
Depthextensionbasedondepthchangesonmagneticfieldsisamethodthatisusedtocomputetheextensionofmagneticfielddatatogreaterdepths.Themethodisbasedontheassumptionthatthechangesinthemagneticfieldarecausedbychangesinthemagneticsusceptibilityoftherocks.Bymodelingthischange,itispossibletoestimatethedepthofthesourcescausingthemagneticanomaly.Themethodusestheconceptofasourcedepthfunction,whichrelatesthemagneticfieldataparticularpointtothedepthofthemagneticsource.
Themethodinvolvestheinversionofthesourcedepthfunctiontoestimatethemagneticsusceptibilitystructureofthesubsurface.Thisinversionisachievedbysolvinganonlinearoptimizationproblemusingaregularizedleast-squareinversion.Inordertosolvethisproblem,aregularizationconstraintisimposedonthesolution,whichhelpstostabilizetheinversionandremovenoise.
StudiesonDepthExtensionBasedonDepthChangesonMagneticFields
Severalstudieshavebeenconductedtoinvestigatetheperformanceofthedepthextensionmethodbasedondepthchangesonmagneticfields.DeSantisetal.(2014)usedthemethodtoinvestigatethemagneticstructureoftheTyrrhenianSea.Theyfoundthatthemethodwasabletoimprovetheresolutionofthemagneticdataatgreaterdepths.Furthermore,theyfoundthatthemethodwasabletoresolvethemagneticanomalyassociatedwiththeseafloorspreadingintheTyrrhenianSea.
Fedietal.(2015)usedthemethodtoinvestigatethemagneticstructureoftheUmbriaRegioninCentralItaly.Theyfoundthatthemethodwasabletoaccuratelyestimatethedeptha