Use of induced polarization and exploratory drilling atDeep-study of silicic zone bearing gold in listvenite of northeast
|Category||Economic geology & mineral exploration|
|Location||21th symposium on geosciences|
|Holding Date||21 May 2008|
Important of listvenite rocks and specially breccia arsenic ? sulfide silicic veins in this rocks (silicic listvenite type bearing gold) in the south of Mokhtaran (south of Birjand) is by reason of gold exploration. In the studied area, especially in thrust and contact of fault location have formed many sulfide silicic veins in body of silicic ? carbonatic listvenite and serpentinic ultrabasic host rocks. Chemical analysis of rock samples and so concentrate of pyrite particles in the artificial heavy mineral samples of this veins show the most content of gold in the part listvenite complex.
Geophysical exploration research to induced polarization (IP) method on this veins state IP high intensity in relation to host rock and another listvenite parts because of concentration of sulfide minerals (pyrite, chalcopyrite and arsenopyrite). Often, extent of anomalies is towards west and maximum depth is 80 meters.
On the base of exploratory cores study, eastern part of the area shows well adjusting to IP profiles, as well is distinguished carbonatic?oxidan zone in upper parts in relation to sulfide zone in under parts.
Gold with pyrite, chalcopyrite, and ? was deposited as fracture filling (disseminate texture) and co?timing to cryptocrystaline silica, and a few after alteration of ultrabasic and in place of thrusting, surface of faults and fractures and veinlets and to pay attention with operation of carbonatic listvenite part as geochemical bar.
However, this arsenic? sulfide silicic vein can be considered as important aim for detail exploration of gold in listvenitic complex.