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首页> 外文期刊>Australian Geomechanics >LARGE EARTHQUAKE RECURRENCE IN THE SPRIGG-OROGEN, SOUTH AUSTRALIA AND IMPLIC ATIONS FOR EARTHQUAKE HAZARD ASSESSMENT
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LARGE EARTHQUAKE RECURRENCE IN THE SPRIGG-OROGEN, SOUTH AUSTRALIA AND IMPLIC ATIONS FOR EARTHQUAKE HAZARD ASSESSMENT

机译：南澳大利亚斯普里格造山带的大型地震复发及其对地震危害评估的意义

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摘要

The Australian continent is actively deforming at a range of scales in response to far-field stresses associated with plate margins, and buoyancy forces associated with mantle dynamics. On the smallest scale (several 10's of km), fault-related deformation associated with far-field stress partitioning has modified surface topography at rates of up to approximately 100 m/Myr. This deformation is evidenced in the record of historical earthquakes, and in the pre-historic record in the landscape. Paleoseismological studies indicate that few places in Australia have experienced a maximum magnitude earthquake since European settlement, and that faults in most areas are capable of hosting potentially catastrophic earthquakes with magnitudes in excess of 7.0. South Australia is well represented in terms of its pre-historic earthquake record. Seismogenic faulting in the last 5-10 million years is thought to be responsible for generating more than 30-50% of the contemporary topographic relief separating the highlands of the Flinders and Mt Lofty Ranges from adjacent plains, and perhaps as much as a third of the strain budget of the entire continent is accommodated there. Adelaide itself straddles several faults which are arguably some of Australia's most active. Decisions relating to the siting and construction of the built environment should therefore be informed with knowledge of the local neotectonics.
机译：澳大利亚大陆正在积极应对各种规模的变形，以应对与板块边缘相关的远场应力以及与地幔动力学相关的浮力。在最小的尺度上（几分之十公里），与远场应力分配相关的与断层有关的变形以最高约100 m / Myr的速率改变了表面形貌。这种变形在历史地震的记录以及景观的史前记录中得到了证明。古地震学研究表明，自欧洲定居以来，澳大利亚很少有地方经历过最大地震，而且大多数地区的断层都能够承受超过7.0级的潜在灾难性地震。在史前地震记录方面，南澳大利亚的代表性很好。人们认为，在过去的5到1千万年间，地震成因造成了超过30-50％的当代地形起伏，将弗林德斯山脉和高山山脉的高地与相邻的平原区分开，可能占三分之一。整个大陆的应变预算都存放在这里。阿德莱德本身跨越了几个断层，这些断层可以说是澳大利亚最活跃的断层。因此，应在了解当地新构造论的基础上，作出与建筑环境选址和建设有关的决定。

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