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首页> 外文期刊>Journal of Volcanology and Geothermal Research >A 90,000-200,000 Yrs Marine Tephra Record Of Italian Volcanic Activity In The Central Mediterranean Sea
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A 90,000-200,000 Yrs Marine Tephra Record Of Italian Volcanic Activity In The Central Mediterranean Sea

机译：在地中海中部90,000-200,000年海上特非拉火山记录的意大利火山活动

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摘要

A detailed tephrochronological study was undertaken in three deep-sea cores collected in the Tyrrhenian and Ionian Seas. The age and the origin of the marine tephra were inferred from oxygen isotope records of foraminifera and from major element compositions of glass-shards. Seventy-one eruptions were detected in the time interval 90,000-200,000 yrs during which the volcanoes af the Roman and Campanian regions and of the southern Italy were in activity. This is attested by the consistency of the geochemical compositions of both marine and terrestrial deposits. Most of the marine tephra consisted in trachytes and phonolites characterizing a Roman and Campanian origin. Several tephra were proposed as key-horizons for proximal and distal sediments. Among them, one tephra originating from Mount Etna (149,300 yrs) and five tephra from Pantelleria island (130,000 yrs, 163,600 yrs, 192,500 yrs, 197,400 yrs and 198,400 yrs) were northerly dispersed. Several other key horizons originated from the Campanian or Roman provinces were detected as far as 1000 km from the vents.
机译：在第勒尼安海和爱奥尼亚海收集的三个深海岩心中进行了详细的年代学研究。从有孔虫的氧同位素记录和玻璃碎片的主要元素组成可以推断出海生苔藓的年龄和起源。在90,000-200,000年的时间间隔内发现了71次喷发，在此期间，罗马和坎帕尼亚地区以及意大利南部的火山处于活动状态。海洋和陆地沉积物的地球化学组成的一致性证明了这一点。大部分海洋特发拉属都是罗马人和坎帕尼亚人起源的曲折风和方音石。有人提出了几种提弗拉作为近端和远端沉积物的关键地平线。其中，一枚源自埃特纳火山的提菲拉（149,300年）和五枚来自潘泰莱里亚岛的提菲拉（130,000年，163,600年，192,500年，197,400年和198,400年）散布在北部。在距喷口1000公里处还检测到了其他几个来自坎帕尼亚或罗马省的主要层位。

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