JaLCDOI 10.18926/ESR/13861
タイトル(別表記) 重力異常データのカラムインバージョンから見積もったモホ不連続面の形状
フルテキストURL earth_science_reports_011_1_1.pdf
著者 福永 真理子| 小田 仁| 志知 竜一|
抄録 We present an inversion method, called "column inversion", to retrieve two-dimensional variation of the depth to the Moho discontinuity from Bouguer gravity anomaly data, assuming that a density jump between the lower crust and upper mantle is regionally invariant. The inversion method is applied to reveal the apatial undulation of the Moho discontinuity in the Chugoku and Shikoku districts, southwest Japan. The result shows that the Moho is deep in the land area and shallow in the sea area. The Moho is anomalously deep in the west regions of Shikoku and Chugoku districts, where the prominent negative gravity anomaly is observed. The two-dimensional variation of the Moho depth is quite similar to that determined by inversion of the first P-arrival time data. The column inversion of the Bouguer gravity anomaly data is proved to be useful for determining the fine structure of the Moho discontinuity undulation.
キーワード Bouguer Gravity Anomaly Column Inversion Moho Discontinuity Chugoku and Shikoku Districts
出版物タイトル Okayama University Earth Science Report
発行日 2004-12-31
開始ページ 1
終了ページ 5
ISSN 1340-7414
言語 English
著作権者 岡山大学地球科学研究報告編集委員会
論文のバージョン publisher
NAID 120002310563