Compiling and verifying 3D models of 2D induced polarization and resistivity data by geostatistical methods

Acta Geophysica

Hamidreza Ramazi¹  Kamran Mostafaei¹ 

[1] Amirkabir University of Technology

关键词: 3D model;    Induced polarization (IP);    Electrical resistivity tomography (ERT);    Fractal;    Geostatistics;    Uncertainty;   

DOI  :  10.1007/s11600-018-0175-5

学科分类：地球科学(综合)

来源: Polska Akademia Nauk * Instytut Geofizyki

【 摘 要 】

A 3D model of collected time-domain induced polarization (IP) and electrical resistivity tomography (ERT) data is compiled by geostatistical methods as well as studying spatial correlation among the database. Mesgaran copper deposit, located in Birjand eastern Iran, was chosen to compile and verify the model, leading to five parallel surveyed IP and ERT profiles with dipole–dipole arrays. The collected data were inverted, and then 2D models of IP and ER were prepared; also 3D inversion was done. Afterward, the 3D model has been built by geostatistical methods. Correspondingly, the anomalies threshold was detected by fractal methods and the estimation variance and Kriging efficiency were calculated to validate the modeling. The mineralization zones were determined according to the classified anomalies and those with the lowest error. Results indicated a high correlation between anomalies identified from the model and mineralization. The results made it possible to construct 3D models from surveyed 2D data with acceptable error level.

【 授权许可】

Unknown