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地球学报  2004 

吉林大椅子山火山年代学、地球化学特征及其排气量的估算

Keywords: 大椅子山火山,晚更新世,地球化学,铀系组分法,排气量估算

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Abstract:

利用铀系组分法测得龙岗大椅子山火山喷发时间为距今71±9ka,属于晚更新世。各类喷发物的岩石化学、地球化学特征表明,它们形成于同一岩浆源。根据岩石学方法,结合Thordarson(1996)等人的排气模型,估算此次喷发向大气层输送的HCl、HF总量分别为7.36Mt和5.21Mt。

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