朝鲜平南盆地寒武系黄州群和法洞群的碳同位素漂移事件  

Carbon Isotope Excursions of Cambrian Hwangju and Bopdong Groups in Pyongnam Basin,Korean Peninsula

作　　者：金明哲[1,2] 杨正赫 彭澎 张志越[2,3] 朴贤旭 卞创男 朴雄 郑哲寿 翟明国[2,3] Kim Myong-Cho;Yang Jong-Hyok;Peng Peng;Zhang Zhiyue;Park Hyon-Uk;Byon Chang-Nam;Park Ung;Jong Chol-Su;Zhai Mingguo(Institute of Geology,State Academy of Sciences,Pyongyang 3812100,DPR Korea;Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China;University of Chinese Academy of Sciences,Beijing 100049,China;University of Pyongsong Coal Industry,Pyongsong 999093,DPR Korea)

机构地区：[1]朝鲜国家科学院地质学研究所,朝鲜平壤3812100 [2]中国科学院地质与地球物理研究所,北京100029 [3]中国科学院大学,北京100049 [4]平城煤工业大学,朝鲜平城999093

出　　处：《地球科学》2018年第11期4096-4108,共13页Earth Science

基　　金：国家自然科学基金项目(Nos.41772192;41322018);中国科学院前沿重大基础项目(No.QYZDB-SSW-DQC04281712250)

摘　　要：朝鲜平南盆地寒武系包括黄州群和法洞群下部.为了与邻区及世界其他地区同时期地层进行对比,对黄州群(从下到上分为坪山组、中和组、黑桥组和林村组)和法洞群下部(戊辰组和古丰组)进行了生物地层学和碳酸盐岩碳和氧同位素分析.生物地层学研究表明,坪山组和中和组分别不早于寒武系第三阶和第四阶.坪山组δ^(13)C值变化范围为0～-3.1‰,中和组为-4.7‰～2.0‰,黑桥组为-1.0‰～2.4‰,林村组为-2.6‰～0.4‰,戊辰组为-1.3‰～0.4‰,古丰组为-1.0‰～2.4‰.综合对比分析,坪山组、中和组和黑桥组大致对应寒武系第三阶-第四阶,林村组大致对应第二统与苗岭统界线附近,古丰组大致对应芙蓉统.中和组上部-黑桥组(正漂移)、林村组下部(负漂移)和古丰组中部(正漂移)记录的3个碳同位素漂移事件可能分别对应MICE(mIngxinsi carbon isotope excursion)、ROECE(redlichiid-olenellid extinction carbon isotope excursion)和SPICE(steptoean positive carbon isotope excursion)全球性事件.The Cambrian strata in the Pyongnam basin in Korea include the Hwangju Group and the lower Bopdong Group. To compare the Cambrian strata of this basin with those in the adjacent regions and areas beyond, this paper performs biostratigraphy research and isotope analysis of carbon and oxygen isotopes of typical carbonates of the Hwangju Group （the Pyongsan, Junghwa, Hukgyo and Rimchon Fms.） and the lower Bopdong Group （the Mujin and Kopung Fms.）. Based on biostratigraphic research, the Pyongsan and Junghua Formations should be no lower than Stage 3 and Stage 4, respectively. 313C vatues in the Pyongsan Fro. range from 0 to -3.1‰, Junghua - 4.7‰ to 2.0‰, Hukgyo - 1.0%0 to 2.4‰, Rimchon - 2.6%0 to 0.4‰, Mujin -1.3%0 to 0.4‰, and Kopung -1.0%0 to 2.4‰. Synthetically, it is argued that the Pyongsan, Junghua and Hukgyo Fms. belong to Stages 3-4 of Cambrian, the Rimchon Fm. is around the boundary of Series 2 and Miaoling Series, and the Kopung Fm. belongs to the Furong Series of Cambrian. And the three carbon excursions in the upper Junghwa-Hukgyo Fm. （positive）, the lower Rimchon Fm. （negative） and the middle Kopung Fm. （positive） are comparable to the global events of the mIngxinsi carbon isotope excursion, redlichiid-olenellid extinction carbon isotope excursion and steptoean positive carbon isotope excursion, respectively.

关 键 词：华北克拉通 朝鲜半岛 平南盆地 寒武系 碳同位素漂移 生物地层学 

分 类 号：P539.7[天文地球—古生物学与地层学] P56[天文地球—地质学]