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2016 Fiscal Year Final Research Report

High-velocity impact of micrometeorites: implication for evolution of asteroid regolith

Research Project

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Project/Area Number 26800235
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Solid earth and planetary physics
Research InstitutionOkayama University

Principal Investigator

Shimaki Yuri  岡山大学, 惑星物質研究所, 助手 (60710548)

Project Period (FY) 2014-04-01 – 2017-03-31
Keywords衝撃変成 / クレーター / 普通コンドライト / 小惑星
Outline of Final Research Achievements

We carried out high-velocity impact-experiments of metal and silicate projectile into regolith of silicates including ordinary chondrites by vertical and horizontal two-stage light-gas-gun in the Institute of Space and Astronautical Science to examine crater formation process and physicochemical evolution of regolith on asteroid surface. A new vacuum impregnation system for embedding crater on regolith was developed. Impact products distribute at depth of two times of projectile diameter from surface. Impact melt consists of sub-micron silicates and metal spherules with trace-element abundance similar to bulk composition.

Free Research Field

数物系科学

URL: 

Published: 2018-03-22  

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