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首页> 外文期刊>Tectonophysics: International Journal of Geotectonics and the Geology and Physics of the Interior of the Earth >Late Pleistocene to Holocene record of changing uplift rates in southern Calabria and northeastern Sicily (southern italy, Central Mediterranean Sea)
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Late Pleistocene to Holocene record of changing uplift rates in southern Calabria and northeastern Sicily (southern italy, Central Mediterranean Sea)

机译：晚更新世至全新世记录了卡拉布里亚南部和西西里岛东北部（意大利南部，地中海中部）的隆升率变化

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摘要

A combination of published and new radiometric dates on uplifted Holocene fossil beaches front northeastern Sicily and southern Calabria (southern Italy) is compared with the altitude of the inner margin of the Last Interglacial (LIg) (Late Pleistocene, similar to 124 ka) and older marine terraces in order to gain a regional-scale outline of uplift rates and their temporal changes in a region which is one of the fastest uplifting sectors of the Central Mediterranean Sea. Late Holocene radiocarbon dates from Ioppolo (southern Calabria) and Ganzirri (northeast Sicily), two newly discovered sites are here presented for the first time. The Holocene uplift rates are highest at St. Alessio and Taormina in eastern Sicily (2.4 mm/y) and at Scilla in southwestern Calabria (2.1 mm/y), two sites located across the Messina Straits and which separate the island of Sicily from mainland Italy. Uplift rates decrease towards the south and north from this centre of uplift. Late Holocene uplift rates show an apparent increase of between 64 and 124% when compared with the longer-term uplift rates calculated from the LIg highstand terraces. Furthermore, we discovered that the locations of fastest Late Pleistocene and Late Holocene uplift rates spatially coincide. To what extent the Holocene increase in uplift rates results from incomplete elastic strain release along the major extensional faults which frame the seismotectonic of the area, or indicate a true change in regional tectonic processes, is not resolved. Nonetheless, the heterogeneity of uplift, with a well-defined centre that crosses the Messina Straits, and its persistence at different time-scales indicates a tight connection between wider regional processes and fault-related displacement in controlling crustal instability in this area. (c) 2006 Elsevier B.V. All rights reserved.
机译：将西西里岛东北部和卡拉布里亚南部（意大利南部）隆起的全新世化石海滩上已公布和新的辐射测量日期相结合，并将其与上一次冰期（LIg）（晚更新世，类似于124 ka）及更老的内缘的高度进行比较海洋梯田，以便获得一个区域范围的提速率及其随时间变化的轮廓，该区域是中地中海地区提速最快的地区之一。全新世晚期的放射性碳来自Ioppolo（卡拉布里亚南部）和Ganzirri（西西里东北部），这是两个新发现的地点。在西西里岛东部的圣阿莱西奥和陶尔米纳（2.4毫米/年）和卡拉布里亚西南部的斯希拉（2.1毫米/年），全新世隆升速率最高，这两个地点位于墨西拿海峡两岸，将西西里岛与大陆隔开意大利。从这个隆升中心向南和向北隆升的速率降低。与从LIg高位阶地计算出的长期隆升率相比，全新世晚期隆升率明显增加了64％至124％。此外，我们发现最快的更新世和全新世晚期隆升的位置在空间上是重合的。全新世隆升速率的增加在多大程度上是由沿着该地区地震构造的主要伸展断层释放的不完全弹性应变释放导致的，或表明区域构造过程发生了真正的变化，这一点尚未解决。尽管如此，隆升的非均质性具有清晰的中心，横贯墨西拿海峡，并且其在不同时间尺度上的持续性表明，在控制该地区的地壳不稳定方面，更广泛的区域过程和与断层有关的位移之间存在紧密的联系。 （c）2006 Elsevier B.V.保留所有权利。

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