Blake excursion at Vulcano (Aeolian Islands, Italy): Revised K-Ar and 40 Ar/ 39 Ar ages
作者: Hervé GuillouVincent ScaoSébastien Nomade
作者单位: 1Laboratoire des Sciences du Climat et de L’Environnement (IPSL-CEA-CNRS-UVSQ), Domaine du CNRS Bât., 12, Avenue de la Terrasse, 91198 Gif sur Yvette, France
刊名: Quaternary Geochronology, 2016, Vol.35 , pp.77-87
来源数据库: Elsevier Journal
DOI: 10.1016/j.quageo.2016.06.002
关键词: GeochronologyExcursion40 Ar/ 39 ArVolcanism
英文摘要: Abstract(#br)In this study, we combine the unspiked K-Ar and the 40 Ar/ 39 Ar methods to refine the dating of the directional excursion recorded in a lava sequence from Vulcano (Aeolian Islands, Italy) and attributed to the Blake excursion. This approach evidences some errors in the K-Ar dating of the Vulcano sections (erroneous determination of K contents, insufficient gas clean-up). Coupled with the inability of the unspiked method to evidence excess/fractionated 40 Ar and/or xenocrystic contamination, we consider the 40 Ar/ 39 Ar technique the most appropriate one for calibrating time scales by the K-Ar clock. Our new five ages assess that the directional excursion as recorded in the Vulcano section belongs to the termination of the Blake excursion that we date at 110.7 ± 1.6 ka. We...
全文获取路径: Elsevier  (合作)
影响因子:4.015 (2012)