Geophysical investigation using gravity data in Kinigi geothermal field, northwest Rwanda

Jean d.Amour Uwiduhaye, Hideki Mizunaga, Hakim Saibi

研究成果: Contribution to journalArticle査読

17 被引用数 (Scopus)

抄録

A land gravity survey was carried out in the Kinigi geothermal field, Northwest Rwanda using 184 gravity stations during August and September, 2015. The aim of the gravity survey was to understand the subsurface structure and its relation to the observed surface manifestations in the study area. The complete Bouguer Gravity anomaly was produced with a reduction density of 2.4 g/cm3. Bouguer anomalies ranging from −52 to −35 mGals were observed in the study area with relatively high anomalies in the east and northwest zones while low anomalies are observed in the southwest side of the studied area. A decrease of 17 mGals is observed in the southwestern part of the study area and caused by the low-density of the Tertiary rocks. Horizontal gradient, tilt angle and analytical signal methods were applied to the observed gravity data and showed that Mubona, Mpenge and Cyabararika surface springs are structurally controlled while Rubindi spring is not. The integrated results of gravity gradient interpretation methods delineated a dominant geological structure trending in the NW-SE, which is in agreement with the regional geological trend. The results of this gravity study will help aid future geothermal exploration and development in the Kinigi geothermal field.

本文言語英語
ページ(範囲)184-192
ページ数9
ジャーナルJournal of African Earth Sciences
139
DOI
出版ステータス出版済み - 3 2018

All Science Journal Classification (ASJC) codes

  • 地質学
  • 地表過程

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