Early Cretaceous Volcanism in Central and Eastern Argentina During Gondwana Break-Up

冈瓦纳大陆分裂期间阿根廷中部与东部的早白垩纪火山

地球科学

售   价:
442.00
出版时间
2016年04月15日
装      帧
平装
ISBN
9783319295916
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页      码
135
语      种
英语
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图书简介
This book analyzes the Early Cretaceous volcanic processes in Misiones Province and in Sierra Chica de Córdoba (Argentina). The volcanism in Misiones is tholeiitic and belongs to the Parana Magmatic Province (PMP), which extends throughout South America. In contrast, the volcanism in Córdoba is geographically restricted and of alkaline nature, representing a potassic locality peripheral to the PMP. To understand the causes of and geodynamic processes involved in these volcanisms, a new 40Ar /39Ar of 129.6 ± 1 Ma of a trachyte from Sierra Chica de Córdoba is presented. This dating points out that the volcanism in Sierra Chica de Córdoba slightly postdates PMP lavas. Moreover, complementary geochemical analyses from Misiones Province are presented and compared with those from the whole PMP in order to characterize its source
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