Inversion of geophysical data of Hafthar Pb-Zn deposit
عنوان دوره: نوزدهمین کنفرانس ژئوفیزیک ایران
نویسندگان
1دانشگاه صنعتی شاهرود
2دانشیار دانشکده مهندسی معدن، نفت و ژئوفیزیک، دانشگاه صنعتی شاهرود
3گروه ژئوفیزیک، دانشکده نفت معدن ژئوفیزیک، دانشگاه صنعتی شاهرود
4دانشجوی دکتری، موسسه ژئوفیزیک دانشگاه تهران
چکیده
In the recent decades, in order to detect the vein and disseminated mineral deposits, electrical resistivity and induced polarization (IP) methods have been widely utilized as powerful exploratory tools. The process of inverting collected data is one of the key steps in the demonstration of electrical resistivity and induced polarization images in the subsurface. In this paper, the results obtained from two widely used software named Res2dinv and Zondres2d are compared. For this purpose, the data surveyed in lead and zinc deposit in Hafthar area located at 32 km west of Aghda are used. The survey of data has been carried out by utilizing rectangular arrangement for prospecting and dipole-dipole arrangement to investigate the depth expansion and lateral changes. Also, in order to compare and validate the models obtained, Zondres2d software is applied with different algorithms including Smoothness constrained, Occam, and Marquardt-Levenberg for inversion. Finally, considering the best algorithms, which have the best adaption with the results of drilling and the information of geology, the best model is proposed.
کلیدواژه ها
 
Title
Inversion of geophysical data of Hafthar Pb-Zn deposit
Authors
Hamid Bizhani, Abolghasem Kamkar-Rouhani, Alireza Arabamiri, Saeed Parnow
Abstract
In the recent decades, in order to detect the vein and disseminated mineral deposits, electrical resistivity and induced polarization (IP) methods have been widely utilized as powerful exploratory tools. The process of inverting collected data is one of the key steps in the demonstration of electrical resistivity and induced polarization images in the subsurface. In this paper, the results obtained from two widely used software named Res2dinv and Zondres2d are compared. For this purpose, the data surveyed in lead and zinc deposit in Hafthar area located at 32 km west of Aghda are used. The survey of data has been carried out by utilizing rectangular arrangement for prospecting and dipole-dipole arrangement to investigate the depth expansion and lateral changes. Also, in order to compare and validate the models obtained, Zondres2d software is applied with different algorithms including Smoothness constrained, Occam, and Marquardt-Levenberg for inversion. Finally, considering the best algorithms, which have the best adaption with the results of drilling and the information of geology, the best model is proposed.
Keywords
Electrical resistivity, induced polarization (IP), rectangular array, Dipole-dipole array, lead and zinc, Hafthar