河北省涞水县安妥岭钼矿含矿岩体与成矿的关系

安妥岭岩体位于太行山北段岩浆成矿带,目前已发现一个大型钼矿,成矿地质条件良好,找矿潜力较大.含矿岩体是一个复式杂岩体,主要成分顶部核心为石英花岗斑岩,而花岗闪长斑岩、二长花岗斑岩环绕其构成岩体主体;含矿岩石具有富碱富钾的总体特征,Na2O与K2O随SiO2增加而增加.复式含矿岩体控制了矿化的形态和特征,矿化带呈一个倒扣的不规则筒状,在岩体与围岩接触带形成裂隙式充填的脉状矿体,而岩体深部为隐爆角砾岩状矿化和浸染状矿化,属于斑岩型矿床.安妥岭岩体矿化蚀变分带明显,从矿化中心向外蚀变分带为:钾化-硅化带、硅化-绢云母化带、青盘岩化带、泥化-黄铁矿弱硅化带和矽卡岩带.本文就安妥岭钼矿含矿岩体与成矿的关系进行了研究,对安妥岭钼矿的进一步找矿和探讨太行山成矿带斑岩型钼矿的成矿规律都有重要意义.

Relationship Between the Ore-Bearing Rock and Antuoling Mo Deposit in Laishui County,Hebei Province

The Antuoling porphyry body is located in the magma metallogenic belt of the Northern Taihang Mountains.A large molybdenum deposit is discovered with good geological condition of mineralization and prospecting potential in it now.It is a compound porphyry body in which quartz porphyry is in top core and granodiorite-porphyry and monzonite granite-porphyry are surrounded it.The characteristic of ore-bearing rock is rich in alkali and potassic elements.With increase of SiO2,Na2O and K2O increase.The compound porphyry body controls the mineralization pattern and characteristic.Mineralization zone appears an inverted irregular cylinder.Contact zone of the porphyry body and the wall rocks forms faults and fissures filled with vein ore bodies.The deep rock is with cryptoexplosive breccia mineralization and contaminated mineralization.The deposit belongs to porphyry type deposit.The mineralization altered zone is obvious,from the center to outward as potassium-silicified zone,silicified-sericited zone,propylitization zone,argillized-pyrite weak silicified zone and skarm zone.Study on the relationship between the Antuoling Mo deposit and the compound porphyry rock is of big importance for prospecting porphyry-type Mo deposit in the Antuoling Mo deposit and Taihang Mountains metallogenic belt.