Reconstructing geologic histories of volcanic fields on Earth and Mars

重建地球和火星火山场的地质历史

• 批准号: 385955-2010
• 负责人: Schmidt, Mariek
• 金额: $ 1.97万
• 依托单位: Brock University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=572907
• 关键词: Reconstructing; geologic; histories; volcanic; fields

The style, timing, distribution, and composition of small-volume basaltic volcanic eruptions are influenced by the climate and tectonic regime in which they form. The proposed research program investigates clusters of diverse volcanoes and volcanic rocks on both Earth and Mars. Gusev Crater, Mars The Mars Exploration Rover Spirit has discovered diverse volcanic and hydrothermally altered rocks. A technique is needed to differentiate primary rock compositions from overprinting alteration. Once rock compositions are deconvolved, they may be used to correlate layered units, alteration conditions, and the mapping of local alteration gradients in order to unravel the magmatic and aqueous history of Mars. Terrestrial volcanic fields I propose to investigate the lifespan, eruption rates, and compositional variability of volcanism in Fort Rock-Christmas Lake (FRCL Basin) in Oregon and in Red Hill Volcanic Field (RHVF) in New Mexico by geologic mapping, whole rock geochemistry, and 40Ar/39Ar geochronology. The timing and alteration of hydrovolcanism will give indication of past climate. Whole rock compositions and petrologic modeling will give insight to mantle melting in back arc setting and heterogeneity and assimilation rates of the upper (lithospheric) mantle.

小体积玄武岩火山喷发的类型、时间、分布和组成受其形成的气候和构造制度的影响。拟议中的研究计划调查了地球和火星上各种各样的火山群和火山岩。