Microgravity survey in 2009-2010 around Bacman geothermal field, Philippines - gravity corrections and interpretations

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dc.contributor Jarðhitaskóli Háskóla Sameinuðu þjóðanna is
dc.contributor.author Monasterial, Jonathan Lee C. is
dc.date.accessioned 2020-07-03T09:48:42Z
dc.date.available 2020-07-03T09:48:42Z
dc.date.issued 2016
dc.identifier.issn 1670-7427
dc.identifier.uri http://hdl.handle.net/10802/24004
dc.description Í: Geothermal training in Iceland 2015, bls. 495-516 is
dc.description.abstract A microgravity survey was conducted in 2009-2010 around the Bacman geothermal field, Philippines. The observed gravity readings were subjected to the standard reduction process such as tidal, instrumental drift, latitude, and terrain corrections using Gravos, Gnet, Terra and Terrb reduction programs. Free-air and Bouguer corrections were calculated by using the Bouguer program. After these corrections, the optimum reduction density was determined analytically by using the Parasnis method. To enhance the local anomalies, the regional trend in the Bouguer maps was removed. The regional field was estimated to be planar. Positive anomalies in the central part of the field are within the Bacman Fault Zone. These are interpreted to be dense, intrusive rocks such as diorite which are present beneath this area based on core samples. In addition, these anomalies extend to the western and northern regions of the field near Mts. Tikolob and Kayabon and may be related to the resistivity anomaly seen in the western part of the field. Negative anomalies represent the sedimentary formations and collapse features in the southeastern and northern parts of the area, respectively. Using limiting depth analysis, the dense intrusive rock was approximated as a spherical body and its centre was found to be at a depth of around 900 m. In addition, an irregularly shaped body was assumed to be present beneath the western parts of the field and a depth to the top of this body was found to be about 1750 m. is
dc.format.extent 1 rafrænt gagn (22 bls.). is
dc.language.iso en
dc.publisher United Nations University is
dc.publisher Orkustofnun is
dc.relation.ispartofseries United Nations University., UNU Geothermal Training Programme, Iceland. Report ; 2015 : 23
dc.relation.uri http://os.is/gogn/unu-gtp-report/UNU-GTP-2015-23.pdf
dc.subject Jarðhiti is
dc.subject Jarðeðlisfræði is
dc.subject Filippseyjar is
dc.title Microgravity survey in 2009-2010 around Bacman geothermal field, Philippines - gravity corrections and interpretations en
dc.title.alternative Geothermal training in Iceland en
dc.type Bók is
dc.identifier.gegnir 991011828769706886


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