Mineral records of magma storage and crystallization on the Moon

月球上岩浆储存和结晶的矿物记录

基本信息

批准号：
2594636
负责人：
金额：
--
依托单位：
University of Manchester
依托单位国家：
英国
项目类别：
Studentship
财政年份：
2021
资助国家：
英国
起止时间：
2021 至无数据
项目状态：
未结题

来源：
https://gtr.ukri.org/projects?ref=studentship-2594636
关键词：
Mineral records magma storage crystallization

项目摘要

The Moon preserves a remarkable record of volcanism on a small rocky terrestrial planet. Lunar lavas were mainly erupted between ~4.35 and 3 billion years ago, with some areas of the Moon being volcanically active as recently as a billion years ago. The lunar lavas were sourced by partial melts from different regions of the lunar mantle, giving rise to a range of geochemical affiliations and crystallization histories. Different lunar magma compositions are thought to have reached the lunar surface via different storage and crystallization pathways, but the pressures and temperatures of magma storage and crystallization are not well known. The aim of this project is therefore to develop new mineral-melt thermobaromers in order to investigate the record of magma storage and crystallization on the Moon. We seek to answer questions such as: Did the lunar magmas stall and crystallize in crustal mush chambers, or did they ascend rapidly from the melting region to the surface? At what pressures and temperatures did crystals nucleate and grow? What can crystal records tell us about subsurface magmatic systems and volcanic eruption styles on rocky planets? The project will exploit recent advances in mineral-melt thermobarometers calibrated for terrestrial magmas to develop new clinopyroxene-melt and olivine-melt thermobarometers that are specifically calibrated for the Na-poor magma compositions and highly reducing conditions relevant to the Moon and rocky asteroids such as Vesta. We will then apply these new methods to suites of lunar lavas sampled by the Apollo astronauts to gain new insights into the architecture of lunar magmatic systems.

月亮在一个小岩石的陆地星球上保留了卓越的火山作用记录。月球熔岩主要在约4.35至30亿年前爆发，而在十亿年前，月球的某些地区在火山上处于活跃状态。月球熔岩是由来自月球地幔不同区域的部分熔体来源的，产生了一系列地球化学隶属关系和结晶历史。人们认为不同的月球岩浆成分已经通过不同的存储和结晶途径到达了月球表面，但是岩浆存储和结晶的压力和温度尚不清楚。因此，该项目的目的是开发新的矿物融化热物体，以研究月球上岩浆存储和结晶的记录。我们试图回答以下问题：Lunar Magmas摊位和在地壳糊状室中结晶，还是它们从熔化区域迅速上升到表面？在什么压力和温度下，晶体成核和生长？ Crystal Records可以告诉我们关于岩石行星上的地下岩浆系统和火山喷发样式的什么？该项目将利用针对陆生岩浆校准的矿物融合热量计学的最新进展，以开发新的斜粘二烯融合和橄榄石熔融热计量机，这些热量计特征是针对Na-Poor Magma组成以及与月球和岩石类小企业相关的NA-POOR MAGMA组成以及高度还原的条件。然后，我们将把这些新方法应用于阿波罗宇航员采样的月球熔岩套件，以获得对月球岩浆系统建筑的新见解。