Abstract
In hard rock terrain the exploration of groundwater is essentially the detection of thick weathered residuum or of zones of intense jointing and fracturing and hence is extremely complex. The present study incorporates the radial vertical electrical sounding (VES) method in understanding the behaviour of rock fracturing at shallow depths in an area of Purulia district, West Bengal, India. The results show that the trends of joints and fractures derived from the radial VES are in striking agreement with those obtained from detailed measurement on the rock exposures. This study further reveals that a saturated fractured system exists at shallow depth and occurs at places in more than one horizon. In this area, granites have developed predominant joints and fractures trending along NESW and E-W directions, while in amphibolites and metabasics the trends are consistently along N-S and WNW-ESE directions. An attempt has also been made to infer the subsurface rock types from this integrated study.
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