Cenozoic tectonic evolution of southeastern Thailand derived from low-temperature thermochronology
Cenozoic tectonic evolution of southeastern Thailand derived from low-temperature thermochronology
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DOI：
10.1144/jgs2018-167
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发表时间：
2019-08
影响因子：
2.7
通讯作者：
Simon Nachtergaele;S. Glorie;C. Morley;P. Charusiri;P. Kanjanapayont;P. Vermeesch;A. Carter;G. Van Ranst;J. De Grave
中科院分区：
文献类型：
--
作者：
Simon Nachtergaele;S. Glorie;C. Morley;P. Charusiri;P. Kanjanapayont;P. Vermeesch;A. Carter;G. Van Ranst;J. De Grave
低温热年代学技术，特别是磷灰石（U-Th）/He和磷灰石裂变径迹测年，被用来重建泰国东南部的热历史。该地区被与新生代美平和三塔断层有关的巨大而复杂的断层网所包围。这些都是从卫星图像中确定的，并经实地观察证实。新的磷灰石裂变径迹和磷灰石（U-Th）/He数据收集这些断层网络内的结晶基底块。获得的年龄范围从48至24 Ma，与大多数样品聚类之间的36和24 Ma。热历史模拟表明，泰国东南部的晚始新世-渐新世暴露的花岗岩和变质基底岩石的折返。折返是区域性的，并与始新世晚期-渐新世早期沿着美平断层和三塔断层的左旋断层活动同时发生。此外，这种折返发生在泰国湾东部的陆内离岸裂谷盆地和半地堑盆地发育的同裂谷阶段。由于沿着巽他大陆复杂的板块边界不断变化的板块构造力，折返阶段在中新世早期结束。补充材料：AFT数据、径向图和热历史建模的详细程序可在https://doi.org/10.6084/m9.figshare.c.4633064上获得。
Low-temperature thermochronological techniques, specifically apatite (U–Th)/He and apatite fission-track dating, were used to reconstruct the thermal history of southeastern Thailand. This area is intersected by vast and complex fault networks related to the Cenozoic Mae Ping and Three Pagodas Faults. These were identified from satellite imagery and confirmed by field observations. New apatite fission-track and apatite (U–Th)/He data were collected from crystalline basement blocks within these fault networks. Ages obtained range from 48 to 24 Ma, with most of the samples clustering between 36 and 24 Ma. Thermal history modelling indicates late Eocene–Oligocene exhumation of the exposed granitic and metamorphic basement rocks in southeastern Thailand. Exhumation was regional and was contemporaneous with sinistral fault activity during the late Eocene–early Oligocene along the Mae Ping Fault and Three Pagodas Fault. Moreover, this exhumation occurred coevally with a synrift phase of intracontinental offshore rift basin and half-graben basin development in the eastern Gulf of Thailand. The phase of exhumation ended in the early Miocene, as a result of the changing plate-tectonic forces along the complex plate boundaries of Sundaland. Supplementary material: AFT data, radial plots and the detailed procedure of thermal history modelling are available at https://doi.org/10.6084/m9.figshare.c.4633064