Exploration refers to the act of searching or prospecting for mineral resources, as defined by law, by geological, geochemical or geophysical surveys, remote sensing, test pitting, trenching, drilling, shaft sinking, tunneling or any other means, for the purpose of determining the existence, extent, quantity, and quality of resources in an area, and the feasibility of utilizing these resources for profit. (Sec. 4(l), R.A. No. 7586 as amended by R.A. No. 11038)