Preservation and peripheral prospecting of Duobaoshan porphyry copper deposit in Heilongjiang Province

The Early Ordovician Duobaoshan porphyry copper deposit is one of the best preserved deposits in the Paleozoic Duobaoshan island arc belt, as the overlying thick Ordovician and Silurian sedimentary strata have kept the deposit from being denuded. Through the geological background analysis of the regional Cu-Au deposits/occurrences, it is found that the Ordovician and Silurian strata forming the arc-basin system of Duobaoshan island arc belt are well developed, and the superposed Cu anomaly concentration center is a favorable target area for Duobaoshan-type porphyry copper deposits. The deep concealed adakitic intrusive rock mass in the target area, then, is the key to achieve prospecting breakthrough.