关键词: 斑岩型钼矿, 　地质特征, 　找矿标志, 　找矿前景

Abstract: Dabaoshan porphyry molybdenum deposit is one of the typical polymetallic deposits in Northern Guangdong Province.According to the geological prospecting and exploration results of the mining area,the geological characteristics of the mining area and the deposit are analyzed,and the prospecting indicators of the mining area are also summarized systematically.The study results show that:①Jurassic stratum is pushed and overlapped by porphyritic mass from NNE to SW in the mining area,the main body of the nappe rock mass is molybdenum orebody,the mineralization of the mining area is mainly for Mo,the local section of the shallow area of the mining area is rich for W,the depth of the mining area is rich for Mo;②the molybdenum orebodies are occurred in the contact zones of granodiorite porphyry and Cambrian clastic rock and dacite porphyry,they are distributed with the shapes of quasilamellar and lenticular,the ore type is mainly for molybdenite ore,and a small amount of pyritemolybdenite ore,molybdenite and pyrite are the main metal metallic minerals, the molybdenum mineralization is occurred with irregular veins and net veins;③Yanshanian mediumacid shallow or ultrashallow intrusions such as granodiorite porphyry and dacite porphyry and the silicification,sericitequartz alteration can be taken as the important prospecting indicators of the porphyry type molybdenum deposit in the mining area.Based on the above 〖CM42-104〗 study results,the further discussion results show that the main orebody (Ⅲ# molybdenum orebody) is 〖LM〗occurred in the bottom of porphyritic mass and the upper of the thrust fault structural surface,the main orebody is closely related to the potassium,sericite and silicification,the length of the orebody controlled in the mining area from the strike direction strike is more than 600 m,the length of the orebody controlled in the mining area from the tendency direction is more than 650 m,the east of 58# exploration line and the depth area are not controlled by exploration engineering,therefore,some prospecting and exploration works is necessary to be conducted along the east of the strike direction and tendency direction of the orebody,and the prospecting potential can be enlarged.

Key words: Molybdenum deposit, Geological characteristics, Prospecting indicator, Prospecting potential