Hengill geothermal volcanic complex (Iceland) characterized by integrated geophysical observations
Structural features of volcanic and hydrothermal systems can be used to infer the location of magma chambers or productive geothermal areas. The Hengill volcanic triple-junction complex has a well-developed geothermal system, which is being exploited to extract hot fluids that are used for electrica...
Published in: | Geothermics |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2011
|
Subjects: | |
Online Access: | https://gfzpublic.gfz-potsdam.de/pubman/item/item_240971 |
id |
ftgfzpotsdam:oai:gfzpublic.gfz-potsdam.de:item_240971 |
---|---|
record_format |
openpolar |
spelling |
ftgfzpotsdam:oai:gfzpublic.gfz-potsdam.de:item_240971 2023-05-15T16:51:08+02:00 Hengill geothermal volcanic complex (Iceland) characterized by integrated geophysical observations Jousset, P. Haberland, C. Bauer, K. Arnason, K. 2011 application/pdf https://gfzpublic.gfz-potsdam.de/pubman/item/item_240971 eng eng info:eu-repo/semantics/altIdentifier/doi/10.1016/j.geothermics.2010.12.008 https://gfzpublic.gfz-potsdam.de/pubman/item/item_240971 info:eu-repo/semantics/openAccess Geothermics 550 - Earth sciences info:eu-repo/semantics/article 2011 ftgfzpotsdam https://doi.org/10.1016/j.geothermics.2010.12.008 2022-09-14T05:53:51Z Structural features of volcanic and hydrothermal systems can be used to infer the location of magma chambers or productive geothermal areas. The Hengill volcanic triple-junction complex has a well-developed geothermal system, which is being exploited to extract hot fluids that are used for electrical power and heat production. In the framework of the I-GET project, a 4-month temporary seismological network including seven high-dynamic broadband instruments was deployed and 1D transient electromagnetic soundings (TEM) and 3D magnetotelluric (MT) surveys were performed to improve the understanding of the relationships between structural features, seismic activity and fluid production at the Hengill geothermal system. The MT and TEM data set are analysed elsewhere. The analysis of the seismological data set allowed the detection and classification of more than 600 earthquakes, among which long-period (LP) earthquakes were observed for the first time in this area. This work focuses first on a joint inversion for the 3D velocity structure and determination of the locations of the hypocentres from about 250 local volcano-tectonic earthquakes with clear P- and S-wave arrival times. The results confirm those from earlier tomography studies in this area. Integrating the seismic velocity and resistivity models in a semi-quantitative approach by cross-plotting the resistivity model with the velocity ratio VP/VS delineates a structural body with a high seismic velocity ratio and low resistivity that is interpreted as the main heat source of the geothermal system. Article in Journal/Newspaper Iceland GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) Hengill ENVELOPE(-21.306,-21.306,64.078,64.078) Geothermics 40 1 1 24 |
institution |
Open Polar |
collection |
GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) |
op_collection_id |
ftgfzpotsdam |
language |
English |
topic |
550 - Earth sciences |
spellingShingle |
550 - Earth sciences Jousset, P. Haberland, C. Bauer, K. Arnason, K. Hengill geothermal volcanic complex (Iceland) characterized by integrated geophysical observations |
topic_facet |
550 - Earth sciences |
description |
Structural features of volcanic and hydrothermal systems can be used to infer the location of magma chambers or productive geothermal areas. The Hengill volcanic triple-junction complex has a well-developed geothermal system, which is being exploited to extract hot fluids that are used for electrical power and heat production. In the framework of the I-GET project, a 4-month temporary seismological network including seven high-dynamic broadband instruments was deployed and 1D transient electromagnetic soundings (TEM) and 3D magnetotelluric (MT) surveys were performed to improve the understanding of the relationships between structural features, seismic activity and fluid production at the Hengill geothermal system. The MT and TEM data set are analysed elsewhere. The analysis of the seismological data set allowed the detection and classification of more than 600 earthquakes, among which long-period (LP) earthquakes were observed for the first time in this area. This work focuses first on a joint inversion for the 3D velocity structure and determination of the locations of the hypocentres from about 250 local volcano-tectonic earthquakes with clear P- and S-wave arrival times. The results confirm those from earlier tomography studies in this area. Integrating the seismic velocity and resistivity models in a semi-quantitative approach by cross-plotting the resistivity model with the velocity ratio VP/VS delineates a structural body with a high seismic velocity ratio and low resistivity that is interpreted as the main heat source of the geothermal system. |
format |
Article in Journal/Newspaper |
author |
Jousset, P. Haberland, C. Bauer, K. Arnason, K. |
author_facet |
Jousset, P. Haberland, C. Bauer, K. Arnason, K. |
author_sort |
Jousset, P. |
title |
Hengill geothermal volcanic complex (Iceland) characterized by integrated geophysical observations |
title_short |
Hengill geothermal volcanic complex (Iceland) characterized by integrated geophysical observations |
title_full |
Hengill geothermal volcanic complex (Iceland) characterized by integrated geophysical observations |
title_fullStr |
Hengill geothermal volcanic complex (Iceland) characterized by integrated geophysical observations |
title_full_unstemmed |
Hengill geothermal volcanic complex (Iceland) characterized by integrated geophysical observations |
title_sort |
hengill geothermal volcanic complex (iceland) characterized by integrated geophysical observations |
publishDate |
2011 |
url |
https://gfzpublic.gfz-potsdam.de/pubman/item/item_240971 |
long_lat |
ENVELOPE(-21.306,-21.306,64.078,64.078) |
geographic |
Hengill |
geographic_facet |
Hengill |
genre |
Iceland |
genre_facet |
Iceland |
op_source |
Geothermics |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.geothermics.2010.12.008 https://gfzpublic.gfz-potsdam.de/pubman/item/item_240971 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.geothermics.2010.12.008 |
container_title |
Geothermics |
container_volume |
40 |
container_issue |
1 |
container_start_page |
1 |
op_container_end_page |
24 |
_version_ |
1766041250888155136 |