Improvement of Raman Spectroscopic Densimetry for Carbon Dioxide Fluid

2015 Fiscal Year Final Research Report

• Project/Area Number: 25287139
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Petrology/Mineralogy/Economic geology
• Research Institution: Hokkaido University
• Principal Investigator: Yamamoto Junji 北海道大学, 総合博物館, 准教授 (60378536)
• Co-Investigator(Kenkyū-buntansha): KAGI Hiroyuki 東京大学, 理学系研究科, 教授 (70233666) ; ISHIBASHI Hidemi 静岡大学, 理学部, 講師 (70456854)
• Co-Investigator(Renkei-kenkyūsha): SUZUKI Toshihiro 独立行政法人海洋研究開発機構, 地球内部ダイナミクス領域, 技術研究副主幹 (40235974)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 流体包有物 / マントル捕獲岩 / 地質圧力計

Outline of Final Research Achievements

We improved Raman spectroscopic densimetry for a CO2 fluid using a micro-Raman spectrometer with high spectral resolution. For precise determination of CO2 density, we obtained the separation of wavenumbers between two main peaks of the CO2 Raman spectrum, with a precision of <<0.006 cm-1. This precision will be enhanced to <<0.003 cm-1 by increasing counts, corresponding to a density precision of <<0.0009 g/cm3, which is approximately one order of magnitude less than that reported in earlier studies.

Free Research Field

マントル化学