Glass is ubiquitous in lunar regolith,and volcanism and hypervelocity impacts are the major mechanisms of forming lunar glasses.Volcanic glasses on the Moon occur as quenched skin of basaltic rocks or as glass spherul...Glass is ubiquitous in lunar regolith,and volcanism and hypervelocity impacts are the major mechanisms of forming lunar glasses.Volcanic glasses on the Moon occur as quenched skin of basaltic rocks or as glass spherules in pyroclastic deposits.Lunar volcanic glass spherules are less than 1 mm in diameters,and most are less than 300μm[1].Impact glasses on the Moon are formed by cooling of impact melt and/or condensation of impact vapor,and impact glass spherules have rotational shapes,smooth surfaces,and largely clast-free interiors[2].Recognized impact glass spherules on the Moon are dominantly sub-millimeter in sizes,and few are up to~8 mm in diameter[3].Glass spherules record important information about the mantle composition and the history of lunar volcanism and impact cratering[4].Transparent and translucent glasses on the Moon are less than 1 mm in diameters,and larger ones are dark and opaque[5].Hitherto discovered macro-sized glass globules on the Moon(up to~4 cm in diameter)are opaque impact glass(Fig.1a,b)that usually contains hollows and lithic clasts[6].展开更多
基金supported by the Strategic Priority Program of the Chinese Academy of Sciences(XDB41000000)the Pre-research Project on Civil Aerospace Technologies(D020101,D020202)of China National Space Administration+2 种基金the National Natural Science Foundation of China(41773063)the Key Research Program of Frontier Sciences,Chinese Academy of Sciences(QYZDY-SSWDQC028)the Fundamental Research Funds for the Central Universities。
文摘Glass is ubiquitous in lunar regolith,and volcanism and hypervelocity impacts are the major mechanisms of forming lunar glasses.Volcanic glasses on the Moon occur as quenched skin of basaltic rocks or as glass spherules in pyroclastic deposits.Lunar volcanic glass spherules are less than 1 mm in diameters,and most are less than 300μm[1].Impact glasses on the Moon are formed by cooling of impact melt and/or condensation of impact vapor,and impact glass spherules have rotational shapes,smooth surfaces,and largely clast-free interiors[2].Recognized impact glass spherules on the Moon are dominantly sub-millimeter in sizes,and few are up to~8 mm in diameter[3].Glass spherules record important information about the mantle composition and the history of lunar volcanism and impact cratering[4].Transparent and translucent glasses on the Moon are less than 1 mm in diameters,and larger ones are dark and opaque[5].Hitherto discovered macro-sized glass globules on the Moon(up to~4 cm in diameter)are opaque impact glass(Fig.1a,b)that usually contains hollows and lithic clasts[6].
