西藏搭格架热泉型铯矿床年代学研究

赵元艺 赵希涛 马志邦. 西藏搭格架热泉型铯矿床年代学研究[J]. 岩石学报, 2006, 22(3): 717-724.
引用本文: 赵元艺 赵希涛 马志邦. 西藏搭格架热泉型铯矿床年代学研究[J]. 岩石学报, 2006, 22(3): 717-724.
ZHAO YuanYi, ZHAO XiTao, MA ZhiBang. Study on chronology for hot spring typed Cs-deposit of Targjia, Tibet[J]. Acta Petrologica Sinica, 2006, 22(3): 717-724.
Citation: ZHAO YuanYi, ZHAO XiTao, MA ZhiBang. Study on chronology for hot spring typed Cs-deposit of Targjia, Tibet[J]. Acta Petrologica Sinica, 2006, 22(3): 717-724.

西藏搭格架热泉型铯矿床年代学研究

  • 基金项目:

    国家科技部973项目2002CB412606课题资助.致谢 本项研究得到国家973项目(印度与亚洲大陆主碰撞带成矿作用)的资助.野外样品采集期间得到王卫东同志的帮助;论文完成过程中得到郑绵平院士和聂凤军研究员的指导与帮助,得到侯增谦研究员与杨岳清研究员的鼓励与支持.论文经侯增谦研究员与曲晓明研究员的审核,并提宝贵意见,特致谢意.

Study on chronology for hot spring typed Cs-deposit of Targjia, Tibet

  • 西藏昂仁县搭格架地热田硅华中的铯达到超大型矿床规模,不同特征的热泉沉积或分布于冈底斯冰期冰碛物的外表或裂隙中,或覆于长马曲上游第5至第1级阶地及现代河床的不同部位.据热泉华野外分布的地貌部位和岩石学特征可将其分为6套.这6套泉华代表性样品的全溶法或等时线法U系测年结果表明:第1套泉华(钙华)形成于晚更新世晚期的末次冰期间冰阶晚期,相当于深海氧同位素第3阶段即MIS 3;第2套泉华(硅华)形成于中更新世晚期的倒数第二次冰期,相当于MIS 8~7;第3套泉华形成于晚更新世早期的末次间冰期,相当于MIS 5;第4套泉华(硅华)形成于晚更新世晚期的末次冰期间冰阶晚期至末次盛冰期早期,相当于MIS 3~2;第5套泉华(硅华)形成于晚更新世末期的末次盛冰期至全新世冰后期,相当于MIS 2~1;第6套泉华即现代硅华.参考前人的ESR年龄测定结果,可将搭格架热泉华的形成分为5个阶段:403~202ka BP,99ka BP左右,39~25ka BP,17~4ka BP与现代.在第3阶段硅华活动早期,有一次钙华活动.
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出版历程
收稿日期:  2005-12-01
刊出日期:  2006-03-31

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