Multidisciplinary exploration of the BOG volcanogenic massive-sulphide prospect, Bathurst, New Brunswick, Canada

Abstract

The BOG volcanogenic massive sulphide occurrence lies in the Brunswick Camp., within 3 km of the now mined out Wedge deposit, in New Brunswick Canada. Orientation soil sampling identified an outstanding CuPbZn anomaly reflecting the prospect after a routine survey conforming to normal industry standards had failed to locate anomalous conditions. The BOG occurrence is mantled by 1 to 2 m of very local till overlain by up to 1 m of bog. The prospect was found after drill testing a strong base metal anomaly defined by a deep overburden survey of 73 holes following up the soil anomaly. The first hole intersected a 3.8-m zone averaging 18% Pb + Zn, 0.78% Cu. 70 ppm Ag and 1.3 ppm Au, but subsequent drilling did not lead to a commercial discovery. Diamond drilling of known geophysical anomalies near the BOG prospect has not been rewarded by discovery. Orientation geophysical surveys have also failed to detect the BOG prospect, leading to the conclusion that the occurrence is too small to be geophysically responsive. Distribution of ore, pathfinder and alteration elements define halos and zoning patterns in bedrock which are reflected in the geochemistry of immediately overlying deep overburden. The B-horizon soil survey shows similar patterns but a larger target is provided with anomalous zones displaced up to 50 m from their source in bedrock.