ABSTRACT
THE INTEGRATED GEOPHYSICAL STUDY FOR DELINEATING CU-AU SULFIDE DEPOSITS IN RUWAN GORA ANKA AREA, NORTHWESTERN, NIGERIA
Journal: Earth Sciences Pakistan (ESP)
Author: Omatola Samson Pascal, Abu Mallam, Abel U. Osagie, Adeeko Tajudeen O.
This is an open access article distributed under the Creative Commons Attribution License CC BY 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited
Doi: 10.26480/esp.01.2024.70.74
The Copper-Gold (Cu-Au) ore-bearing veins in Ruwan Gora, Anka, were studied using ground magnetic, resistivity, and induced polarisation (IP) geophysics methods. The study indicated that shallow/deep tectonic structures in the Precambrian Basement Complex may retain sulphide ores, while shallow granitic intrusive/volcanic rocks have high magnetic susceptibility values. Basement rock ore-bearing veins have susceptibilities of ≤ 50 nT because of the removal of IGRF, resistivity of ≥ 100 Ωm, and IP of > 203 ms. The ores’ electrical data demonstrates mineral zoning. High and low magnetic anomalies which amplitudes of 50nT and -50nT reside in the examined area. This is commendable given the slight magnetic anomaly. The residual magnetic field intensity map, down to the Interpreted Structural Map with an identification number, indicated considerable anomalies with trends in the NE-SW and N-S and few in E-W ones, which matched various structural trends in the region. IP and resistivity models identified shallow veins and bodies with considerable resistivity and chargeability. Large charged bodies were detected at a depth of ≥ 60m. Most magnetic anomalies examined by the IP survey are charged, and their chargeability increases with depth.
| Pages | 70-74 |
| Year | 2024 |
| Issue | 1 |
| Volume | 8 |
