Cenozoic diatreme field in Chubut （Argentina） as evidence of phreatomagmatic volcanism accompanied with extensive Patagonian plateau basalt volcanism？

作     者：Karoly Nemeth Ulrike Martin Miguel J. Haller Viviana I. Alric 

作者机构：Institute of Natural Resources Volcanic Risk Solutions M_asse_y Uniyer_sity Palmerston North New Zealand. Department of Mapping Geological Institute of Hungary Stefainia 14 Budapest H- 1143 Hungary. Geo-Zentrum an der KTB Am Bohrturm 2 92670 Windischeschenbach Germany. Universidad Nacional de la Patagonea San Juan Bosco Bvard Brown 3700 （9120） Puerto Ma.dryn Argentina. Centro Nacional Patagenico-CONICET Bvard. Brown 3500 （9120） Puerto Madryn Argentina. 

出 版 物：《Episodes》 (地质幕（英文版）)

年 卷 期：2007年第30卷第3期

页      面：217-223页

核心收录：

学科分类：070801[理学-固体地球物理学] 07[理学] 0708[理学-地球物理学] 

主　　题：新生界 火山 地下水湿生植物 玄武岩 

摘      要：In Patagonia, Argentina, at the northern border of the Patagonian Cenozoic mafic plateau lava fields, newly discovered diatremes stand about I00 m above the sur- rounding plain. These diatremes document phreato- magmatic episodes associated with the formation of the volcanic fields. The identified pyroclastic and intrusive rocks are exposed lower diatremes of former phreato- magmatic volcanoes and their feeding dyke systems. These remotely located erosional remnants cut through Paleozoic granitoids and Jurassic/Cretaceous alternating siliciclastic continental successions that are rela-