CAJ | 학술논문

粤北连平地区钨锡多金属矿床类型主要为石英脉型.采用云母Ar-Ar法和石英包裹体Rb-Sr法.分别获得:锯板坑含钨锡石英脉中的云母Ar-Ar坪年龄为(139.2±1.5)Ma(等时线年龄为143.6±3.9 Ma,MSWD:0.30):鸡啼石含钨石英脉中石英包裹体Rb-Sr等时线年龄为(155.4±5.1)Ma(MSWD=2.1).结果表明该区存在燕山早期和燕山早晚过渡期两期钨锡多金属成矿作用,并且认为:(1)鸡啼石钨矿为南岭地区中生代大规模成岩成矿作用高峰期(150～160 Ma)的产物;(2)南岭地区140 Ma左右也有大型钨锡多金属矿的形成.这一成果为研究区域成矿规律,指导区域找矿提供了重要同位素年代学依据.
월북련평지구오석다금속광상류형주요위석영맥형.채용운모Ar-Ar법화석영포과체Rb-Sr법.분별획득:거판갱함오석석영맥중적운모Ar-Ar평년령위(139.2±1.5)Ma(등시선년령위143.6±3.9 Ma,MSWD:0.30):계제석함오석영맥중석영포과체Rb-Sr등시선년령위(155.4±5.1)Ma(MSWD=2.1).결과표명해구존재연산조기화연산조만과도기량기오석다금속성광작용,병차인위:(1)계제석오광위남령지구중생대대규모성암성광작용고봉기(150～160 Ma)적산물;(2)남령지구140 Ma좌우야유대형오석다금속광적형성.저일성과위연구구역성광규률,지도구역조광제공료중요동위소년대학의거.
Quartz veins constitute the main metallogenic type of tungsten -tin polymetallic deposits in Lianping area, northern Guangdong Province. In this study, ~(40)Ar-~(39)Ar dating of mica from tungsten-tin bearing quartz veins in the Jubankeng ore deposit yielded a plateau age of (139.2 ±1.5) Ma with an isochron age of (143.6 ± 3.9) Ma (MSWD =0.30), and Rb-Sr dating of fluid inclusions in quartz from the Jitishi tungsten deposit produced an isochron age of (155.4 ±5.1)Ma(MSWD=2.1). These results show that there exist two metallogenic epochs in Lianping area: one is Early Yangshanian, during which the Jitishi tungten deposit was formed and the gigantic diagenetic and metallogenic peak of Nanling region occurred, and the other is the transitional period from Early to Late Yangshanian, during which the Jubankeng tungsten-tin polymetallic deposit was formed. These data provide important geochronologic constraints for regional metallogenic regularity research and mineral exploration in this region.