Generalisation and improvement of the compact gravity inversion method

• Autorzy: Zhu Wenwu , Peng Junhuan , Luo Sanming , Meng Xiangang , Liu Jinzhao , Zhu Chuandong

Identyfikatory

DOI

10.1007/s11600-020-00495-0

• Języki publikacji: EN

Abstrakty

EN

Compact gravity inversion (CGI) is widely used to invert gravity data following the principle of minimising the volume of the causative body due to its simplicity, high efciency, and sharp-boundary inversion results. In this study, the compactness weighting function is generalised and the depth weighting function is introduced to CGI to obtain the reweighted CGI (RCGI) method. Although RCGI exhibits better fexibility than CGI, selecting an appropriate compactness factor α and depth weighting function β is difcult, and we design a parameter selection rule to search the proper α and β quantitively. Furthermore, we improve RCGI for boasting superior computational efciency by gradually eliminating the model blocks that reach the designated boundaries in the iterative algorithm of inversion. This approach is termed the reweighted and element-elimination CGI (REECGI) method. The inversion results show that both RCGI and REECGI result in better inversion accuracy than CGI, and REECGI has higher computational efciency than RCGI and CGI, which increases with the number of iterations.

Słowa kluczowe

EN

compact gravity inversion; inversion theory; compactness factor; weighting function; inversion accuracy; computational efficiency

PL

kompaktowa inwersja grawitacyjna; teoria inwersji; współczynnik zwartości; funkcja wagi; dokładność inwersji; wydajność obliczeniowa

• Wydawca: Instytut Geofizyki PAN ; Springer
• Czasopismo: Acta Geophysica
• Rocznik: 2020
• Tom: Vol. 68, no. 6
• Strony: 1667--1677
• Opis fizyczny: Bibliogr. 28 poz.

Twórcy

autor

Zhu Wenwu

• China University of Geosciences (Beijing), Beijing 100083, China
• The First Crust Monitoring and Application Centre, China Earthquake Administration, Tianjin 300180, China

autor

Peng Junhuan

• China University of Geosciences (Beijing), Beijing 100083, China

autor

Luo Sanming

• The First Crust Monitoring and Application Centre, China Earthquake Administration, Tianjin 300180, China

autor

Meng Xiangang

• The First Crust Monitoring and Application Centre, China Earthquake Administration, Tianjin 300180, China

autor

Liu Jinzhao

• The First Crust Monitoring and Application Centre, China Earthquake Administration, Tianjin 300180, China

autor

Zhu Chuandong

• The First Crust Monitoring and Application Centre, China Earthquake Administration, Tianjin 300180, China

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