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Payenia Quaternary flood basalts（southern Mendoza, Argentina）：Geophysical constraints on their volume

ISSN号：1005-9903
期刊名称：《中国实验方剂学杂志》
时间：0
分类：P588.145[天文地球—岩石学;天文地球—地质学] TH133.3[机械工程—机械制造及自动化]
作者机构：[1]Instituto de Estudios Andinos Don Pablo Groeber (I DEAN), UBA-CONICET, Argentina, [2]Instituto de Investigaci6n en Paleobiologia y Geologia, Universidad Nacional de Rio Negro - CONICET, Argentina, [3]Instituto Geofisico y Sismologico Ing. Volponi, Universidad Nacional de San Juan. CONICET, Argentina
相关基金：Acknowledgments Dr. A. Burd and an anonymous are thanked for their critical comments that helped to improve the manuscript. Thanks also go to the editors for improvement and help with the language. This is the contribution R-174 of IDEAN.

作者： Mauro G.Spagnuolo[1], Darío L.Orts[2], Mario Gimenez[3], Andres Folguera[1], Victor A.Ramos[1]

关键词：体积计算, 玄武岩, 阿根廷, 物理约束, 第四纪, 数字高程模型, 重力数据, 地理信息系统, Payenia, Gravimetric model, Plume , Uplift, Andes

中文摘要：

The Quaternary volcanic province of Payenia is located in southern Mendoza and northern Neuquén provinces of Argentina and is characterized by a dominant basaltic composition. The volcanic province covers an area larger than 40,000 km2 and its origin and evolution has been the center of several studies.In this study we analyzed gravity data together with more accurate volcanic volumes calculations in order to investigate the subsurface structure of the Payenia volcanic province. The volume of material was calculated using digital elevation models and geographic information system(GIS) techniques to estimate the volume of material erupted and then, with those values, make an estimation of the intrusive material that could be located within the crust. The results of the calculations were compared with different 2D-sections constructed to model the gravity data and compare with the observed satellite gravity. After evaluating different models which have been generated to match both: the observed gravity data and the subsurface material calculated, we discuss those that best fit with observation. The results clearly indicate that the lithosphere is attenuated below the region.

英文摘要：

The Quaternary volcanic province of Payenia is located in southern Mendoza and northern Neuquén provinces of Argentina and is characterized by a dominant basaltic composition. The volcanic province covers an area larger than 40,000 km2 and its origin and evolution has been the center of several studies.In this study we analyzed gravity data together with more accurate volcanic volumes calculations in order to investigate the subsurface structure of the Payenia volcanic province. The volume of material was calculated using digital elevation models and geographic information system（GIS） techniques to estimate the volume of material erupted and then, with those values, make an estimation of the intrusive material that could be located within the crust. The results of the calculations were compared with different 2D-sections constructed to model the gravity data and compare with the observed satellite gravity. After evaluating different models which have been generated to match both： the observed gravity data and the subsurface material calculated, we discuss those that best fit with observation. The results clearly indicate that the lithosphere is attenuated below the region.