CAJ | 학술논문

对蒙古国南戈壁地区查干苏布尔加和苏廷斑岩型矿床的容矿花岗岩进行SHRIMP锆石U-Th-Pb同位素测定，结果表明查干苏布尔加斑岩型铜钼矿床矿化花岗闪长岩的侵位年龄为368±4Ma，苏廷铜矿花岗岩的侵位年龄为333±4Ma，表明它们形成于不同的时代。结合已有资料提出，蒙古南戈壁地区发育2条时代不同的斑岩型铜矿带：一条为晚泥盆世，以欧玉陶勒盖和查干苏布尔加矿床为代表；另一条为中晚石炭世，以苏廷及曼达赫斑岩型矿床为代表。同时，结合区域资料，初步探讨了2条斑岩成矿带的成矿地质背景。
대몽고국남과벽지구사간소포이가화소정반암형광상적용광화강암진행SHRIMP고석U-Th-Pb동위소측정，결과표명사간소포이가반암형동목광상광화화강섬장암적침위년령위368±4Ma，소정동광화강암적침위년령위333±4Ma，표명타문형성우불동적시대。결합이유자료제출，몽고남과벽지구발육2조시대불동적반암형동광대：일조위만니분세，이구옥도륵개화사간소포이가광상위대표；령일조위중만석탄세，이소정급만체혁반암형광상위대표。동시，결합구역자료，초보탐토료2조반암성광대적성광지질배경。
Granitic porphyries hosting the Tsagaan Suvarga and Shuteen porphyry-type copper deposits in the South Gobi, Mongo?lia, were dated by using SHRIMP zircon U-Th-Pb technique. The dating results show that the Tsagaan Suvarga granodiorite and Shuteen granite were emplaced at 368±4Ma and 333±4Ma, respectively, suggesting that they formed in two different geological ep?ochs. In combination with data available, the authors hold that there are two metallogenic zones of porphyry-type copper deposits with different ages in the South Gobi area of Mongolia: one is Late Devonian in age, which is represented by Oyu Tolgoi and Tsagaan Suvarga copper deposits, and the other is Late Carboniferous in age, with the Shuteen and Mandah deposits being typical ones. The geological settings of the two porphyry-type metallogenic zones are preliminarily discussed in the context of regional tec?tonic evolution.