The late Quaternary tephrostratigraphical record of the San Gregorio Magno basin (southern Italy)
The late Quaternary tephrostratigraphical record of the San Gregorio Magno basin (southern Italy)
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圣格雷戈里奥马尼奥盆地（意大利南部）晚第四纪地层地层记录
DOI：
10.1002/jqs.1025
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发表时间：
2007
影响因子：
2.3
通讯作者：
P. Petrosino
中科院分区：
文献类型：
--
作者：
R. Munno;P. Petrosino
在南亚平宁地区的San Gregorio Magno盆地的湖泊沉积物中发现了21个原生火山碎屑层。这些沙粒大小的地层的特点是含有明显的幼年碎屑，并与下伏的粘土和粉砂沉积物有明显的基底接触。tephra层已与坎帕尼亚火山地区著名喷发事件的陆地对应层或深海沉积物岩心和Monticchio maar层序的参考层进行了对比。通过对San Gregorio Magno tephra地层的研究，可以推断出San Gregorio Magno盆地的湖泊沉积始于170k年前，至少持续到那不勒斯黄凝灰岩的侵位，该侵位大约发生在15k年前。地层年代学可以测定盆地中不同的沉积速率。湖相记录与海相序列的对比表明，意大利南部发育晚第四纪暖层型。版权所有©2006约翰威利父子有限公司
Twenty‐one primary pyroclastic layers were found embedded in the lacustrine sediments of the San Gregorio Magno basin (Southern Apennines). These sand‐sized layers were characterised by a noticeable juvenile fragments content and by a sharp basal contact with the underlying clay and silt sediments. The tephra layers have been correlated with terrestrial counterparts from well‐known eruptive events of the Campanian volcanic area, or with reference layers from deep sea sediment cores and from the Monticchio maar sequence. The investigation of the San Gregorio Magno tephra layers made it possible to deduce that lacustrine sedimentation at San Gregorio Magno basin began before 170k yr BP and lasted at least until the emplacement of the Neapolitan Yellow Tuff, which occurred about 15k yr BP. The tephrochronology allowed determination of the varying sedimentation rate that occurred in the basin. Correlation of the lacustrine record with marine sequences has allowed development of a late Quaternary tephrostratotype for southern Italy. Copyright © 2006 John Wiley & Sons, Ltd.