Journal of Geology & Geophysics
Open Access

Use of seismic refraction tomography to obtain the thickness and P-Wave velocity of the Weathered Zone in Oru, Imo State, Nigeria

International Conference on Geosciences and Geophysics

October 06-07, 2016 Orlando, USA

Akanbi Eti-Mbuk Stella

University of Jos, Nigeria

Posters & Accepted Abstracts: J Geol Geophys

Abstract :

The Younger Granite rocks of the Jos Plateau and surrounding areas are richly mineralized with cassiterite. Consequently, a lot of mining activities have been carried out over the years in the area, many of which are carried out by trial and error means e.g. (Loto mining). In this study, some locations in the Jos-Bukuru complex were selected for field work which involved a reconnaissance geological survey and 2-D electrical resistivity survey. The strike of joints on rock outcrops revealed a dominant NE-SW trend and the petrographic study revealed dominance of biotite, quartz and feldspar in hand specimen and thin section. The measured apparent resistivity was iteratively subjected to inversion process using RES2DINV software, to generate the 2-D resistivity sections which revealed that the average depth to probable cassiterite bearing alluvium is least at Doi 2 (6 m) and most at Vom 1 (50 m). The average thickness of probable cassiterite bearing alluvium is least at Kwang Rayfield 2 (2 m) and greatest at Chongopyeng 1 (8 m). Suspected igneous intrusions and fractures were observed within the subsurface of Kwang Rayfield 1 and 2, Doi 1 and 2, Rapkparak Shen and Kwata Zawan 1 and 2 profiles. The 2-D resistivity sections for Vom 1 and 2 revealed probable depths to sub-basalt valley to be greater than 50 m and 45 m, respectively. Based on the findings of this study, it can be concluded that though large lodes of cassiterite may have been extracted, there may still be cassiterite deposits in the Naraguta area.

Biography :

Email: akanbieti@gmail.com