Interpretation of gravity anomaly over 2D vertical and horizontal thin sheet with finite length and width

Acta Geophysica

article

Biswas, Arkoprovo¹ 

[1] Department of Geology, Centre of Advanced Study, Institute of Science, Banaras Hindu University

关键词: Gravity anomaly;    2D sheet;    VFSA;    Mineral exploration;   

DOI  :  10.1007/s11600-020-00464-7

学科分类：地球科学(综合)

来源: Polska Akademia Nauk * Instytut Geofizyki

【 摘 要 】

Gravity data are often used for delineation of the lateral and vertical extension of mineralized bodies buried at different depths. Various parameters associated with the buried bodies are the primary concern for mineral exploration purposes. Hence, a reliable and efficacious interpretation method is developed for the delineation of gravity anomaly data over the 2D vertical and horizontal sheet with finite length and width associated with mineralized bodies. The parameters viz. amplitude coefficient (k), location (x0), depth to the top of the body (h), length of the sheet (L), and shape factor (q) for 2D vertical sheet-type structure and depth (h) and width (w) of the sheet for 2D horizontal sheet were resolved. Restricting x0 and q has given very reliable results for the 2D vertical sheet, and the w for 2D horizontal sheet shows the problem of equivalence. However, in all cases, the delineated parameters are within the expected uncertainty. The present interpretation method was applied to synthetic and noisy data and three field examples from the USA, Canada, and Sweden for mineral exploration purposes. It has also been seen that the present study is more reliable in delineating the actual structure associated with mineralized bodies for the 2D vertical and horizontal sheet-type structure. The delineated parameters are in outstanding agreement with the earlier works, borehole information and also updated the actual subsurface structure.

【 授权许可】

Unknown