Estimation of Bouguer Density Precision: Development of Method for Analysis of La Soufriere Volcano Gravity Data
<p><a href="http://dx.doi.org/10.17014/ijog.vol3no3.20084" target="_blank">http://dx.doi.org/10.17014/ijog.vol3no3.20084</a></p><p>The precision of topographic density (Bouguer density) estimation by the Nettleton approach is based on a minimum corre...
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doaj-0ffface3a9d043d68595f6a21a9242ad2020-11-25T02:00:25ZengGeological AgencyIndonesian Journal on Geoscience2355-93142355-93062014-06-013315115910.17014/ijog.3.3.151-15956Estimation of Bouguer Density Precision: Development of Method for Analysis of La Soufriere Volcano Gravity DataHendra Gunawan0Micheldiament Micheldiament1Valentin Mikhailov2Pusat Vulkanologi dan Mitigasi Bencana Geologi, Jl. Diponegoro No. 57, Bandung, IndonesiaUniversité Paris Diderot (Paris 7) - Institut de Physique du Globe de Paris (IPGP), Geophysique spatiale et planétaire, Bâtiment Lamarck, 5 rue Thomas Mann-75205, ParisInstitute of Physics of the Earth, Russian Academy of Sciences, 10B. Gruzinskaya, Moscow, 123995<p><a href="http://dx.doi.org/10.17014/ijog.vol3no3.20084" target="_blank">http://dx.doi.org/10.17014/ijog.vol3no3.20084</a></p><p>The precision of topographic density (Bouguer density) estimation by the Nettleton approach is based on a minimum correlation of Bouguer gravity anomaly and topography. The other method, the Parasnis approach, is based on a minimum correlation of Bouguer gravity anomaly and Bouguer correction. The precision of Bouguer density estimates was investigated by both methods on simple 2D syntetic models and under an assumption free-air anomaly consisting of an effect of topography, an effect of intracrustal, and an isostatic compensation. Based on simulation results, Bouguer density estimates were then investigated for a gravity survey of 2005 on La Soufriere Volcano-Guadeloupe area (Antilles Islands). The Bouguer density based on the Parasnis approach is 2.71 g/cm3 for the whole area, except the edifice area where average topography density estimates are 2.21 g/cm3 where Bouguer density estimates from previous gravity survey of 1975 are 2.67 g/cm3. The Bouguer density in La Soufriere Volcano was uncertainly estimated to be 0.1 g/cm3. For the studied area, the density deduced from refraction seismic data is coherent with the recent Bouguer density estimates. New Bouguer anomaly map based on these Bouguer density values allows to a better geological intepretation.</p> <p> </p> <p> </p>https://ijog.geologi.esdm.go.id/index.php/IJOG/article/view/56Bouguer densityfree-air anomalyBouguer anomaly |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Hendra Gunawan Micheldiament Micheldiament Valentin Mikhailov |
spellingShingle |
Hendra Gunawan Micheldiament Micheldiament Valentin Mikhailov Estimation of Bouguer Density Precision: Development of Method for Analysis of La Soufriere Volcano Gravity Data Indonesian Journal on Geoscience Bouguer density free-air anomaly Bouguer anomaly |
author_facet |
Hendra Gunawan Micheldiament Micheldiament Valentin Mikhailov |
author_sort |
Hendra Gunawan |
title |
Estimation of Bouguer Density Precision: Development of Method for Analysis of La Soufriere Volcano Gravity Data |
title_short |
Estimation of Bouguer Density Precision: Development of Method for Analysis of La Soufriere Volcano Gravity Data |
title_full |
Estimation of Bouguer Density Precision: Development of Method for Analysis of La Soufriere Volcano Gravity Data |
title_fullStr |
Estimation of Bouguer Density Precision: Development of Method for Analysis of La Soufriere Volcano Gravity Data |
title_full_unstemmed |
Estimation of Bouguer Density Precision: Development of Method for Analysis of La Soufriere Volcano Gravity Data |
title_sort |
estimation of bouguer density precision: development of method for analysis of la soufriere volcano gravity data |
publisher |
Geological Agency |
series |
Indonesian Journal on Geoscience |
issn |
2355-9314 2355-9306 |
publishDate |
2014-06-01 |
description |
<p><a href="http://dx.doi.org/10.17014/ijog.vol3no3.20084" target="_blank">http://dx.doi.org/10.17014/ijog.vol3no3.20084</a></p><p>The precision of topographic density (Bouguer density) estimation by the Nettleton approach is based on a minimum correlation of Bouguer gravity anomaly and topography. The other method, the Parasnis approach, is based on a minimum correlation of Bouguer gravity anomaly and Bouguer correction. The precision of Bouguer density estimates was investigated by both methods on simple 2D syntetic models and under an assumption free-air anomaly consisting of an effect of topography, an effect of intracrustal, and an isostatic compensation. Based on simulation results, Bouguer density estimates were then investigated for a gravity survey of 2005 on La Soufriere Volcano-Guadeloupe area (Antilles Islands). The Bouguer density based on the Parasnis approach is 2.71 g/cm3 for the whole area, except the edifice area where average topography density estimates are 2.21 g/cm3 where Bouguer density estimates from previous gravity survey of 1975 are 2.67 g/cm3. The Bouguer density in La Soufriere Volcano was uncertainly estimated to be 0.1 g/cm3. For the studied area, the density deduced from refraction seismic data is coherent with the recent Bouguer density estimates. New Bouguer anomaly map based on these Bouguer density values allows to a better geological intepretation.</p> <p> </p> <p> </p> |
topic |
Bouguer density free-air anomaly Bouguer anomaly |
url |
https://ijog.geologi.esdm.go.id/index.php/IJOG/article/view/56 |
work_keys_str_mv |
AT hendragunawan estimationofbouguerdensityprecisiondevelopmentofmethodforanalysisoflasoufrierevolcanogravitydata AT micheldiamentmicheldiament estimationofbouguerdensityprecisiondevelopmentofmethodforanalysisoflasoufrierevolcanogravitydata AT valentinmikhailov estimationofbouguerdensityprecisiondevelopmentofmethodforanalysisoflasoufrierevolcanogravitydata |
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