U-Pb detrital zircon geochronology of sedimentary rocks in NE Vietnam: Implication for Early and Middle Devoni-an Palaeogeography
U-Pb detrital zircon geochronology of sedimentary rocks in NE Vietnam: Implication for Early and Middle Devoni-an Palaeogeography
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DOI：
10.15625/0866-7187/39/4/10727
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发表时间：
2017-09
影响因子：
1.5
通讯作者：
P. Königshof;U. Linnemann;T. Phương
中科院分区：
文献类型：
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作者：
P. Königshof;U. Linnemann;T. Phương
越南东北部杜孙半岛的岩石主要由古生代硅质碎屑岩组成。总的沉积记录代表了靠近海岸线的河流-三角洲进积沉积。给出了东红河盆地凡参组和凡洪组两个样品的碎屑锆石U-Pb分析结果。用LA-SF电感耦合等离子体质谱(LA-SF)-电感耦合等离子体质谱(ICP-MS)技术分析了锆石的U、Th和Pb同位素。各组最年轻的锆石沉积年龄分别为407.1±9.5 Ma和406.3±4.0 Ma。这两个样品的锆石簇支持越南东北部靠近喜马拉雅西部的假设位置。
Rocks of the Do Son Peninsula in NE Vietnam are mainly composed of Palaeozoic siliciclastics. The overall sedimentary record represents fluvial to deltaic prograding deposits close to a shoreline. We present detrital zircon U-Pb analytical results from two samples, the Van Canh and the Van Huong Formations (east Red River Basin). Zircons were analyzed for U, Th, and Pb isotopes by LA-SF ICP-MS techniques. The youngest zircon of each formation provides maximum ages of sedimentation at 407.1 ± 9.5 Ma and 406.3 ± 4.0 Ma. The zircon cluster of both samples supports the postulated position of NE Vietnam close to the western Himalaya.