Reconstructing geologic histories of volcanic fields on Earth and Mars

小规模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。拟议的研究计划调查地球和火星上不同的火山群和火山岩。 古瑟夫陨石坑，火星 火星探测车勇气号发现了各种各样的火山和热液蚀变岩石。需要一种技术来区分原生岩石成分和叠印蚀变。一旦岩石成分被解卷，它们就可以用来关联分层单位、蚀变条件和局部蚀变梯度图，以便解开火星的岩浆和水历史。 陆相火山岩气田 我建议通过地质填图、全岩地球化学和40Ar/39Ar年代学来研究俄勒冈州罗克斯堡-圣诞湖(FRCL盆地)和新墨西哥州红山火山场(RHVF)火山活动的寿命、喷发速度和成分变异性。火山作用的时间和变化将提供过去气候的迹象。全岩组成和岩石学模拟将有助于了解弧后地幔熔融和上(岩石圈)地幔的不均一性和同化速率。

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.