Aqueous alteration without initial water: possibility of organic-induced hydration of anhydrous silicates in meteorite parent bodies

Abstract Early evolution of Solar System small bodies proceeded through interactions mineral and water. Melting water ice accreted with particles to the parent body results in formation secondary minerals, so-called aqueous alteration. Formation phyllosilicates from anhydrous silicates is a typical alteration effect recorded primitive meteorites. In addition water, organic matter could have been also significant component meteorite bodies. However, role not well understood. We conducted heating experiment silicate (olivine) mixture compounds which simulated primordial System. Dissolution precipitation features were confirmed on olivine surface after at 300 °C for 10 days, proto-phyllosilicates formed area. Magnesite was detected as concomitant phase. These minerals be evidence carbonation induced by generated decomposition hydroxy groups. Our result showed that situ hydrated mineral–organic interaction without initial presence It further implies contact can occur inside H 2 O snow line but matter, initially Water one candidate hydrous formation, example, ordinary chondrites S-type asteroids line. Although origin under debate, generation may explain D-rich because known D rich.