Zircon SHRIMP U-Pb dating for island arc volcanic rock of Fangniugou area in Yitong region of Jilin Province
来源期刊：中南大学学报(英文版)2014年第7期
论文作者：JIANG Zheng-long(姜正龙) QIU Hai-jun(邱海峻) PENG Yu-jing(彭玉鲸) ZHANG Wei-min(张为民) LIANG Shuang(梁爽)
文章页码：2877 - 2884
Key words：Yitong, Jilin Province; Fangniugou; volcanic rock; U-Pb dating; zircon SHRIMP dating; volcanic event
Abstract: Polymetallic iron ore sulphate deposits of marine volcanic rock have been developed in the Fangniugou area, Jilin Province, China, but the division of volcanic ore-bearing strata has not been specifically elucidated and there is disagreement about the division. The sampling and SHRIMP U-Pb zircon dating of volcanic rock for Daheishan in the Fangniugou area and the northeast slope of the Duanjiadian were described. The volcanic rock formation period and recorded the volcanic events in the Daheishan mountains were systematically researched. Two samples of high-precision U-Pb zircon dating were used to represent the volcanic rock fomation period of the Late Silurian. The measured data reflect that multiple volcanic activities occurred during the Middle Silurian, Early Silurian, Middle Ordovician and Silurian, and Late Ordovician, probably matching volcanic events in the Songnan Basin identified from zircon dating. At the same time, it is confirmed that a controversial “conglomerate of Daheishan” did in fact develop in the Late Silurian, and those sections of both the Dazigou and Xinlitun-Taoshan with graptolite had been reversed.
JIANG Zheng-long(姜正龙)1, QIU Hai-jun(邱海峻)2, PENG Yu-jing(彭玉鲸)3, ZHANG Wei-min(张为民)4, LIANG Shuang(梁爽)4
(1. School of Ocean Sciences, China University of Geosciences, Beijing 100083, China;
2. Oil and Gas Resources Strategic Research Center of Ministry of Land and Resources, Beijing 100034, China;
3. Regional Survey of Geology & Mineral Resources, Changchun 130012, China
4. Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China)
Abstract:Polymetallic iron ore sulphate deposits of marine volcanic rock have been developed in the Fangniugou area, Jilin Province, China, but the division of volcanic ore-bearing strata has not been specifically elucidated and there is disagreement about the division. The sampling and SHRIMP U-Pb zircon dating of volcanic rock for Daheishan in the Fangniugou area and the northeast slope of the Duanjiadian were described. The volcanic rock formation period and recorded the volcanic events in the Daheishan mountains were systematically researched. Two samples of high-precision U-Pb zircon dating were used to represent the volcanic rock fomation period of the Late Silurian. The measured data reflect that multiple volcanic activities occurred during the Middle Silurian, Early Silurian, Middle Ordovician and Silurian, and Late Ordovician, probably matching volcanic events in the Songnan Basin identified from zircon dating. At the same time, it is confirmed that a controversial “conglomerate of Daheishan” did in fact develop in the Late Silurian, and those sections of both the Dazigou and Xinlitun-Taoshan with graptolite had been reversed.
Key words:Yitong, Jilin Province; Fangniugou; volcanic rock; U-Pb dating; zircon SHRIMP dating; volcanic event
