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タイトル: Gravity Measurements and Data Reduction for Bouguer Anomaly Map of Peru
その他のタイトル: ペルーにおける重力測定・データ処理およびブーゲ異常図
著者: Fukao, Yoshio
Kono, Masaru
Yamamoto, Akihiko
Saito, Matsuhiko
Nawa, Kazunari
Giesecke, Alberto
Perales, Crisolfo
著者(別言語): 深尾, 良夫
河野, 長
山本, 明彦
斉藤, 松彦
名和, 一成
ギーセッケ, アルベルト
ペラレス, クリソルフォ
キーワード: Andes
Gravity anomaly
Mountain building
発行日: 2000年3月21日
出版者: 東京大学地震研究所
掲載誌情報: 東京大学地震研究所彙報. 第74冊第2号, 2000.3.21, pp. 161-266
抄録: We collected all the data of gravity measurements carried out over the last 40 years by Institute Geofisico del Peru (IGP). Because of the long time since data collection, some of the information needed for data reduction were lost over the years. This loss made it difficult for us to determine all of the gravity values unambiguously and consistently from the presently available IGP data alone. Accordingly, there was a need for independently determined gravity stations to which the measurements done by IGP may be compared. In order to provide reference gravity values, we utilized Japanese survey data collected between 1980 and 1984, and conducted more surveys in various parts of Peru in the period between 1995 and 1998. These gravity stations number more than 800, and provide three or more reference points for each of the IGP survey routes. Using these references, the gravity values were calculated for the IGP dataset and Bouguer corrections were applied. Finally, a Bouguer anomaly map of Peru was produced based on these data. This paper reports all the procedures involved in the data reduction, discusses the reliability of the reduced data, and points out the main features of the Bouguer anomaly map.
URI: http://hdl.handle.net/2261/13175
ISSN: 00408972


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