TY - JOUR
T1 - Lunar and martian silica
AU - Kayama, Masahiro
AU - Nagaoka, Hiroshi
AU - Niihara, Takafumi
N1 - Funding Information:
for inviting Masahiro Kayama to submit to the Special Issue “Mineralogy of Quartz and Silica Minerals” of “Minerals”. We are deeply indebted to Loker He (?ssistant Editor, Minerals) for coordinating our paper. This work was partly supported by the Astrobiology Center of National Institutes of Natural Sciences (NINS) (Grant Number AB291023) and Kurita Water and Environment Foundation (Grant Number 17D006) to T.N.
PY - 2018/7
Y1 - 2018/7
N2 - Silica polymorphs, such as quartz, tridymite, cristobalite, coesite, stishovite, seifertite, baddeleyite-type SiO2, high-pressure silica glass, moganite, and opal, have been found in lunar and/or martian rocks by macro-microanalyses of the samples and remote-sensing observations on the celestial bodies. Because each silica polymorph is stable or metastable at different pressure and temperature conditions, its appearance is variable depending on the occurrence of the lunar and martian rocks. In other words, types of silica polymorphs provide valuable information on the igneous process (e.g., crystallization temperature and cooling rate), shock metamorphism (e.g., shock pressure and temperature), and hydrothermal fluid activity (e.g., pH and water content), implying their importance in planetary science. Therefore, this article focused on reviewing and summarizing the representative and important investigations of lunar and martian silica from the viewpoints of its discovery from lunar and martian materials, the formation processes, the implications for planetary science, and the future prospects in the field of “micro-mineralogy”.
AB - Silica polymorphs, such as quartz, tridymite, cristobalite, coesite, stishovite, seifertite, baddeleyite-type SiO2, high-pressure silica glass, moganite, and opal, have been found in lunar and/or martian rocks by macro-microanalyses of the samples and remote-sensing observations on the celestial bodies. Because each silica polymorph is stable or metastable at different pressure and temperature conditions, its appearance is variable depending on the occurrence of the lunar and martian rocks. In other words, types of silica polymorphs provide valuable information on the igneous process (e.g., crystallization temperature and cooling rate), shock metamorphism (e.g., shock pressure and temperature), and hydrothermal fluid activity (e.g., pH and water content), implying their importance in planetary science. Therefore, this article focused on reviewing and summarizing the representative and important investigations of lunar and martian silica from the viewpoints of its discovery from lunar and martian materials, the formation processes, the implications for planetary science, and the future prospects in the field of “micro-mineralogy”.
KW - Apollo samples
KW - Hydrothermal fluid activity
KW - Igneous process
KW - Lunar and martian meteorites
KW - Mars
KW - Moon
KW - Remote-sensing observation
KW - Shock metamorphism
KW - Silica
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U2 - 10.3390/min8070267
DO - 10.3390/min8070267
M3 - Review article
AN - SCOPUS:85049258409
VL - 8
JO - Minerals
JF - Minerals
SN - 2075-163X
IS - 7
M1 - 267
ER -