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Todo Chile

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Development of a red TL detection system for a single grain of quartz This study deals with the dating by thermoluminescence (TL) of quartz from six volcanic formations of the Saint Lucia Island (Lesser Antilles Arc) Subsequently, Berger (1992) showed that TL signals from 4 to 11 ?m grains of glass separated from tephra beds can be used to accurately date volcanic deposits spanning the Holocene to middle Pleistocene age range. Attempts have been made to date Quaternary volcanic events in the Chaine-des-Puys by using the red thermoluminescence signal from quartz in pyroclastic ash layers, and sediments heated by lava flows (Pilleyre et al., 1992). With regard to anomalous fading, additional work is required to determine whether storage at elevated temperatures can assist in removal of the fading component of the luminescence signals. (más…)