Fission track and fault kinematics analyses for new insight into the Late Cenozoic tectonic regime changes in West-Central Sulawesi (Indonesia)
Fission track and fault kinematics analyses for new insight into the Late Cenozoic tectonic regime changes in West-Central Sulawesi (Indonesia)
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DOI：
10.1016/j.tecto.2005.10.036
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发表时间：
2006-02
期刊：
影响因子：
2.9
通讯作者：
O. Bellier;M. Sébrier;D. Seward;Thierry Beaudouin;M. Villeneuve;Eka Putranto
中科院分区：
文献类型：
--
作者：
O. Bellier;M. Sébrier;D. Seward;Thierry Beaudouin;M. Villeneuve;Eka Putranto
中苏拉威西左旋走滑断裂系统(CSFS)位于印度尼西亚东部太平洋板块、印澳板块和欧亚板块之间的三重结合部内，由北北西的Palu-Koro(PKF)断裂和ESE Matano断裂组成。断裂运动学和裂变径迹分析表明，晚新生代中苏拉威西变形是三个连续构造体制的结果：(1)晚中新世-早上新世(5 Ma)的WNW向缩短，其特征是沿PKF的扭压变形和POSO地区的挤压。这一构造是邦盖-苏拉地块与苏拉威西碰撞的结果。由于中苏拉威西地块被库尔德工人党限制向北挤压，它在当地产生了一个扭压体制。(2)与W向伸展有关的上新世塌陷构造体制。与这些事件同时发生的还有区域降温和折返作用。(3)中苏拉威西地块向北运动和北苏拉威西俯冲(托米尼湾)后弧后扩张的共同作用下形成的第四纪张张体制。
The left-lateral strike-slip Central Sulawesi Fault System (CSFS, composed of the NNW Palu–Koro (PKF) and the ESE Matano faults) is located within the eastern Indonesian triple junction between the Pacific, Indo-Australian and Eurasian plates. Fault kinematic and fission-track analyses show that the Late Cenozoic central Sulawesi deformation results from three successive tectonic regimes: (1) A Late Miocene–early Pliocene (5 Ma) WNW-trending shortening characterized by transpressional deformation along the PKF and compressional in the Poso area. This tectonics resulted from the collision between the Banggai–Sula block with Sulawesi. It produced locally a transpressional regime as a consequence of the northward extrusion of the Central Sulawesi block limited by the PKF. (2) A Pliocene collapse tectonic regime associated with W-trending extension. Coeval with these events regional cooling and exhumation took place. (3) A Quaternary transtensional regime resulting from the combined effects of the Central Sulawesi block northward motion, and extension related to back-arc spreading behind the North Sulawesi subduction (Tomini Gulf).