CAJ | 학술논문

河北省安妥岭钼矿床位于太行山北段，是燕辽钼矿带内著名的钼矿床之一。辉钼矿化呈脉状、薄膜状、浸染状分布于斑岩体及其外接触带中，围岩蚀变为硅化、黄铁矿化、绢云母化、黄铁绢英岩化、青磐岩化等，具有斑岩型钼矿床的基本特征。对矿床中5件辉钼矿样品进行了Re-Os同位素分析，获得模式年龄为（145.7±2.4）～（148.8±2.6） Ma，平均模式年龄为（146.9±1.0）Ma，等时线年龄为（147.3±3.7）Ma，MSWD值为1.5，187Os初始值为（-0.4±2.6）ng/g，表明钼成矿时代为晚侏罗世，属燕山中晚期构造-岩浆-流体活动的产物。样品Re含量为50.42×10-6～104.9×10-6，黄铁矿单矿物δ34 S的变化范围为0.7‰～2.8‰，结合已有的Pb同位素结果，推断成矿物质为壳幔混源，矿床形成于中国北方中生代第二期大规模成矿作用期，处于中国东部构造体制转折阶段。
하북성안타령목광상위우태행산북단，시연료목광대내저명적목광상지일。휘목광화정맥상、박막상、침염상분포우반암체급기외접촉대중，위암식변위규화、황철광화、견운모화、황철견영암화、청반암화등，구유반암형목광상적기본특정。대광상중5건휘목광양품진행료Re-Os동위소분석，획득모식년령위（145.7±2.4）～（148.8±2.6） Ma，평균모식년령위（146.9±1.0）Ma，등시선년령위（147.3±3.7）Ma，MSWD치위1.5，187Os초시치위（-0.4±2.6）ng/g，표명목성광시대위만주라세，속연산중만기구조-암장-류체활동적산물。양품Re함량위50.42×10-6～104.9×10-6，황철광단광물δ34 S적변화범위위0.7‰～2.8‰，결합이유적Pb동위소결과，추단성광물질위각만혼원，광상형성우중국북방중생대제이기대규모성광작용기，처우중국동부구조체제전절계단。
The Antuoling molybdenum deposit in Hebei Province is located in the northern part of the Taihang mountain region in China.It is one of the well-known molybdenum deposits in Yanshan-Liaoning molybdenum ore belt.The main ore-forming types in the deposit include veinlet,film-like,and disseminated molybdenite mineralization,and the mineralization is mainly situated in inner porphyry body and outer contact belts.Hydro-thermal alteration is well developed and is composed of silicification,pyritization,sericitization,pyritization-sericitization and propylitization,with the characteristics of typical porphyry Mo deposits.Re-Os dating of five samples from the Antuoling porphyry-type deposit yield the model age ranging from (145.7 ±2.4 )to (148.8 ±2.6)Ma,with the average model age of (146.9 ±1.0)Ma.The isochron age of (147.3 ±3.7)Ma (initial 187Os=(-0.4 ±2.6)ng/g,and MSWD =1.5)indicates that molybdenum mineralization was formed in Late Jurassic and had spatially and temporally associated with the tectonomagmatic orogenic process in middle-late Yanshanian period in which it is coincident with the large-scale metallogenic event happened in 140 Ma in the northern part of China.The Re contents of the samples ranging from 50.42 ×10 -6 to 104.9 ×10 -6 ,and theδ34 S values of the sulphur isotope ranging from 0.7‰ to 2.8‰,indicate that the ore-forming materials were derived from mixed crust and mantle sources.The Antuoling molybdenum deposit was formed in the Mesozoic second large-scale mineralization period of North China.It is the consequence of the tectonic regime changing from compression to extension.