Universität zu Köln

Adrian, Juliane ORCID: 0000-0002-6023-5173, Tezkan, Bulent and Candansayar, M. Emin (2022). Exploration of a Copper Ore Deposit in Elbistan/Turkey Using 2D Inversion of the Time-Domain Induced Polarization Data by Using Unstructured Mesh. Pure Appl. Geophys., 179 (6-7). S. 2255 - 2273. BASEL: SPRINGER BASEL AG. ISSN 1420-9136

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Abstract

We present the results of a direct current (DC) resistivity and time-domain induced polarization (TDIP) survey exploring a copper ore deposit in Elbistan/Turkey. The ore deposit is elongated below a valley and is of disseminated form with sulfide content. DC and IP data were acquired using the pole-dipole array on eight parallel profiles crossing the valley perpendicularly. The length of each profile was 300 m with an inter-profile distance of about 50 m. The data were interpreted by a newly developed 2D DC/TDIP inversion algorithm. The finite element algorithm uses a local smoothness constrained regularization on unstructured meshes. The finite element forward solution, as well as the inverse problem, is solved by an iterative preconditioned conjugate solver. The depth of investigation (DOI) was determined from cumulative sensitivities of the 2D inversion algorithm results. Because of the dissemination of the ore, the 2D inversion of the DC data was ambiguous: However, due to the sulfide content, a strong chargeability anomaly associated with the ore body was detected. We show that chargeability anomalies can generally be detected in the absence or presence of corresponding resistivity anomalies. This highly chargeable structure was confined in lateral direction. Although the lower boundary of the structure could not be resolved by the applied field set-up, a rough estimation of it could be derived at a depth of 90 m using synthetic modeling analyses. The 2D chargeability models are consistent with existing borehole information.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Adrian, Juliane UNSPECIFIED orcid.org/0000-0002-6023-5173 UNSPECIFIED Tezkan, Bulent UNSPECIFIED UNSPECIFIED UNSPECIFIED Candansayar, M. Emin UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-676938
DOI:	10.1007/s00024-022-03071-3
Journal or Publication Title:	Pure Appl. Geophys.
Volume:	179
Number:	6-7
Page Range:	S. 2255 - 2273
Date:	2022
Publisher:	SPRINGER BASEL AG
Place of Publication:	BASEL
ISSN:	1420-9136
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language DATA INCORPORATING TOPOGRAPHY; DC-RESISTIVITY; ELECTROMAGNETIC DATA; IP; DISCRIMINATION; GEOCHEMISTRY; MODEL Multiple languages Geochemistry & Geophysics Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/67693