Verification of the Nice model by the search for Edgeworth-Kuiper belt objects in brecciated meteorites

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K05339
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Petrology/Mineralogy/Economic geology
• Research Institution: The University of Tokyo
• Principal Investigator: Mikouchi Takashi 東京大学, 大学院理学系研究科(理学部), 准教授 (30272462)
• Research Collaborator: ZOLENSKY Michael ; HOFFMANN Viktor ; GOODRICH Cyrena ; NAGAO Keisuke
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 角レキ岩隕石 / エッジワースカイパーベルト天体 / ニースモデル / エンスタタイトコンドライト / スターダスト探査

Outline of Final Research Achievements

The Nice model predicts the possibility that the fragments of Edgeworth-Kuiper belt objects (EKBO) are present in the regolith of outer asteroid bodies. In this study I paid attention to foreign clasts in regolith brecciated meteorites and analyzed them using optical and electron microscopy, EPMA, Raman spectroscopy and synchrotron XRD. I could not discover possible EKBO materials, but found aqueously altered enstatite chondrites in Kaidun meteorite and discussed the possibility of the origin of earth water.

Free Research Field

惑星物質科学