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Petrochemistry and Tectonic Setting of the Middle Triassic Arc-Like Volcanic Rocks in the Sayabouli Area, NW Laos

Xin Qian Qinglai Feng Yuejun Wang Wenqiang Yang Chongpan Chonglakmani Denchok Monjai

Xin Qian, Qinglai Feng, Yuejun Wang, Wenqiang Yang, Chongpan Chonglakmani, Denchok Monjai. Petrochemistry and Tectonic Setting of the Middle Triassic Arc-Like Volcanic Rocks in the Sayabouli Area, NW Laos[J]. Journal of Earth Science, 2016, 18(3): 365-377. doi: 10.1007/s12583-016-0669-5
引用本文: Xin Qian, Qinglai Feng, Yuejun Wang, Wenqiang Yang, Chongpan Chonglakmani, Denchok Monjai. Petrochemistry and Tectonic Setting of the Middle Triassic Arc-Like Volcanic Rocks in the Sayabouli Area, NW Laos[J]. Journal of Earth Science, 2016, 18(3): 365-377. doi: 10.1007/s12583-016-0669-5
Xin Qian, Qinglai Feng, Yuejun Wang, Wenqiang Yang, Chongpan Chonglakmani, Denchok Monjai. Petrochemistry and Tectonic Setting of the Middle Triassic Arc-Like Volcanic Rocks in the Sayabouli Area, NW Laos. Journal of Earth Science, 2016, 18(3): 365-377. doi: 10.1007/s12583-016-0669-5
Citation: Xin Qian, Qinglai Feng, Yuejun Wang, Wenqiang Yang, Chongpan Chonglakmani, Denchok Monjai. Petrochemistry and Tectonic Setting of the Middle Triassic Arc-Like Volcanic Rocks in the Sayabouli Area, NW Laos. Journal of Earth Science, 2016, 18(3): 365-377. doi: 10.1007/s12583-016-0669-5

Petrochemistry and Tectonic Setting of the Middle Triassic Arc-Like Volcanic Rocks in the Sayabouli Area, NW Laos

doi: 10.1007/s12583-016-0669-5

Petrochemistry and Tectonic Setting of the Middle Triassic Arc-Like Volcanic Rocks in the Sayabouli Area, NW Laos

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出版历程
  • 收稿日期:  2016-06-12
  • 修回日期:  2016-06-12
  • 刊出日期:  2016-06-12

Petrochemistry and Tectonic Setting of the Middle Triassic Arc-Like Volcanic Rocks in the Sayabouli Area, NW Laos

doi: 10.1007/s12583-016-0669-5

摘要: The volcanic rocks from the Sayabouli area in northwestern Laos have been poorly stu- died. These volcanic rocks are traditionally mapped as the Permian–Early Triassic sequences on the geological map. One basaltic-andesite from the Sayabouli area yields a zircon U-Pb age of 237.7±1.7 Ma, suggesting a Middle Triassic origin. All basalt and basaltic-andesite samples from the Sayabouli area show depletions in HFSEs (e.g., Nb, Ta, Ti) and have high LILE/HFSE ratios, and exhibit the geochem- ical affinity to the continental arc volcanic rocks and are geochemically similar to the continental arc volcanic rocks from the Phetchabun belt in northeastern Thailand, suggesting a Late Permian–Middle Triassic continental margin in the Sayabouli area of northwestern Laos and Phetchabun area of nor- theastern Thailand. Our data indicate that the Phetchabun arc volcanic belt through the western Loei sub-belt can be linked to the Sayabouli area in northwestern Laos.

English Abstract

Xin Qian, Qinglai Feng, Yuejun Wang, Wenqiang Yang, Chongpan Chonglakmani, Denchok Monjai. Petrochemistry and Tectonic Setting of the Middle Triassic Arc-Like Volcanic Rocks in the Sayabouli Area, NW Laos[J]. Journal of Earth Science, 2016, 18(3): 365-377. doi: 10.1007/s12583-016-0669-5
引用本文: Xin Qian, Qinglai Feng, Yuejun Wang, Wenqiang Yang, Chongpan Chonglakmani, Denchok Monjai. Petrochemistry and Tectonic Setting of the Middle Triassic Arc-Like Volcanic Rocks in the Sayabouli Area, NW Laos[J]. Journal of Earth Science, 2016, 18(3): 365-377. doi: 10.1007/s12583-016-0669-5
Xin Qian, Qinglai Feng, Yuejun Wang, Wenqiang Yang, Chongpan Chonglakmani, Denchok Monjai. Petrochemistry and Tectonic Setting of the Middle Triassic Arc-Like Volcanic Rocks in the Sayabouli Area, NW Laos. Journal of Earth Science, 2016, 18(3): 365-377. doi: 10.1007/s12583-016-0669-5
Citation: Xin Qian, Qinglai Feng, Yuejun Wang, Wenqiang Yang, Chongpan Chonglakmani, Denchok Monjai. Petrochemistry and Tectonic Setting of the Middle Triassic Arc-Like Volcanic Rocks in the Sayabouli Area, NW Laos. Journal of Earth Science, 2016, 18(3): 365-377. doi: 10.1007/s12583-016-0669-5

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