Data for the potential gold mineralization mapping with the applications of Electrical Resistivity Imaging and Induced Polarization geophysical surveys

To identify the potential zones for gold mineralization at the Felda Chiku 3, Gua Musang, Kelantan, East coast Malaysia, twenty-one (21) geophysical survey lines were conducted at the proposed mineral exploration site using the pole - dipole of the electrical resistivity and induced polarization arrays to get the maximum depth of 150 m with 400 m survey length. From the resistivity and chargeability concentration maps, the potential mineralized zones as delineated, was observed to be dominantly concentrated towards the southwest and northern part of the area. The 3D resistivity and chargeability slice model present low resistivity values and high chargeability values that are well correlated which is palpable especially at the depths of 25 m and 50 m respectively. The data showed that the potential mineralized zones are trending approximately north-south directions. Forty (40) drilling locations were proposed for follow-up drilling based on the resistivity and chargeability models.


a b s t r a c t
To identify the potential zones for gold mineralization at the Felda Chiku 3, Gua Musang, Kelantan, East coast Malaysia, twenty-one (21) geophysical survey lines were conducted at the proposed mineral exploration site using the pole -dipole of the electrical resistivity and induced polarization arrays to get the maximum depth of 150 m with 400 m survey length. From the resistivity and chargeability concentration maps, the potential mineralized zones as delineated, was observed to be dominantly concentrated towards the southwest and northern part of the area. The 3D resistivity and chargeability slice model present low resistivity values and high chargeability values that are well correlated which is palpable especially at the depths of 25 m and 50 m respectively. The data showed that the potential mineralized zones are trending approximately north-south directions. Forty (40) drilling locations were proposed for follow-up drilling based on the resistivity and chargeability models.

Value of the data
The choice of the geophysical techniques with the addition of 3-D GIS model to explored for the gold mineral is to improve prospectivity, the quality of the data and the depth of investigations.
The data help in smart decisions and prioritizing the specific location to be drill for gold exploration. The data is extremely applicable in mineral exploration planning and policy formulations, mining site assessment and sensible gold mineralization project that could be implemented in any part of the World.
The data is crucial in pre-gold-mining decisions that help to safe cost and time for the pinpointing the zones of mineral occurrence.

2-D Electrical Resistivity Imaging (E.R.I) and
Induced Polarization (I.P) geophysical survey were conducted at Felda Chiku 3, Gua Musang, Kelantan, to identify the potential gold mineralization zones. Twenty-one (21) survey lines were conducted at the proposed site using pole -dipole array to get maximum depth of about 150 m with 400 m survey length lines. The survey was carried out using 41 and 61 electrodes respectively for the data collection on a multi-core cables. A resistivity meter system with internal microprocessor (ABEM Terrameter SAS4000) controlled the circuitry together with an electronic selector switching unit (ABEM LUND ES 10 -64C) are used to automatically select the appropriate four electrodes for each measurement [1]. The subsurface geological structures of the area where the data was collected is principally in the state of Kelantan and are mainly distributed in the southern part of the central area as shown in Figs. 1 and 2.

Experimental design, materials and methods
The location of the data collection area is in the southern part of central Kelantan State that covered the catchment area of Sungai Galas from the confluence of Sungai Chiku to upstream Sungai Galas. The gold deposits sited in the project area are principally within the hydrothermal veins that includes low sulphide and high sulphide quartz veins together with quartz veins in sheared granitoid and structurally controlled quartz veins. Basically, the sulphide comprises of modest and confined mineral contents within the veins. The high mercury and silver contents in this region could be perhaps due to basic intrusions that could possibly be situated at a depth of about 700 m below the ground surface. The lithologies of this area as showed in the field observations, comprises of lapilli tuff, phyllite, and schist (Fig. 3). Furthermore, the majority of the phyllite and schist rocks units underlain the subsurface structural formations of the study area were occupied with quartz veins from the geological mapping. On the other hand, the quartz veins were filled-up along the foliation, cracks and fractures of the schist and the phyllite geological formations.
The field data collected were initially processed using RES2DINV software, model of inversion sections (pseudo section), with the distance and the depth generated, together with the topographic correction. The electrical resistivity data helped to delineates the geology and subsurface structures underlain the area, whereas the induced polarization data was used for defining the distributions of potential mineralized zones.
Generally, all the resistivity and chargeability data are as presented in the supplementary file in appendix II, with low resistivity and high chargeability anomalies. The dark red to purple colour on the RES2DINV image presented in Fig. 4, indicates zones with high resistivity data values 4 2000 Ω-