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首页> 外文会议>Proceedings of The 39th IPA convention and exhibition-Working together to accelerate solutions in anticipating indonesia's energy crisis >PALEOSTRESS ANALYSIS OF THE GRINDULU FAULT IN PACITAN AND SURROUNDING AREA AND ITS IMPLICATION TO THE REGIONAL TECTONIC OF EAST JAVA
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PALEOSTRESS ANALYSIS OF THE GRINDULU FAULT IN PACITAN AND SURROUNDING AREA AND ITS IMPLICATION TO THE REGIONAL TECTONIC OF EAST JAVA

机译：帕金坦及周边地区Grindulu断层的古成因分析及其对东爪哇地区构造的启示

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Paleostress terminologically consists of two words:rnpaleo and stress. Paleo means of past time, and stressrnmeans forces worked in an area; thus paleostressrnmeans forces occured in geologic past times. In otherrnwords, paleostress is related to orientations of stress.rnThe Grindulu Fault an active fault segment in Javarnthat could potentially produce earthquakes. Thernlineament of the Grindulu Fault is from SW-NErnacross the Tegalombo Sub-district, Pacitan District,rnProvince of East Java. Paleostress of the GrindulurnFault was conducted using stress inversion of faultrnslip data as the main data.rnThe results of the stress inversion show fivernpaleostress orientations defined from fault slip data:rn(1) ESE-WNW SHmax in the Cretaceous-LaternOligocene; (2) SE-NW SHmax in the LaternOligocene; (3) SSE-NNW SHmax in the LaternOligocene-early of Early Miocene; (4) S-N SHmaxrnin thernEarly Miocene; (5) SSW-NNE SHmax in the MiddlernMiocene to present. The Grindulu Fault itself is arnleft-lateral strike-slip fault (sinistral) formed in thernEarly Miocene with S-N paleostress in a pure strikesliprnstress regime condition and then changes to arntranstensive stress regime condition at MiddlernMiocene until present with SSW-NNE stressrndirection. The final stress state (SSW-NNE) is in therndirection of the India oceanic plate beneath south ofrnJava Island. Today, the Grindulu Fault is normal leftlateralrnslip fault with transtensive stress regime (R’rn0.29-1.07). According to the 3D top basementrnmodeling, it shows one of the lineaments is NE-SW,rnas an old pattern, the Complex of Meratus Mountainrnlineament. This pattern also has the same strike as thernGrindulu Fault. Thus, the Grindulu Fault is formedrnfrom reactivation of preexisting NE-SW faults as anrnold pattern in its basement.
机译：古应力在术语上由两个词组成：rn古和应力。过去的时间意味着古老的手段，压力手段在一个地区起作用。因此，古应力手段是在过去的地质时代发生的。换句话说，古应力与应力的方向有关。Grindulu断层是爪哇岛的活动断层，有可能引起地震。 Grindulu断层的底线来自东爪哇省Pacitan区的Tegalombo分区的SW-NErnacross。 GrindulurnFault的古应力以断层滑动数据的应力反演为主要数据进行。应力反演的结果表明，由断层滑动数据定义了五种古应力方向：rn（1）白垩纪-晚新世渐新世的ESE-WNW SHmax； （2）拉特渐新世中的SE-NW SHmax; （3）早中新世的晚新世中的SSE-NNW SHmax； （4）中新世早期的S-N SHmaxrn； （5）中新世以来的SSW-NNE SHmax。 Grindulu断层本身是在纯中走滑应力状态条件下在中新世早期以S-N古应力形成的向左走向走滑断裂（正弦），然后在中新世中变为无张应力状态，直到出现SSW-NNE应力方向。最终应力状态（SSW-NNE）是在Java岛南部以下的印度洋板块的方向。如今，Grindulu断层是正常的左侧滑移断层，具有张应力状态（R′rn0.29-1.07）。根据3D顶层地下室建模，它显示出其中一种构造是NE-SW，是旧模式，即Meratus Mountainrnlineament复合体。该模式与格林杜鲁断层也有相同的走向。因此，Grindulu断层是通过将先前存在的NE-SW断层重新激活而形成的，其基底为阿诺德模式。

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