Details
| Original language | English |
|---|---|
| Title of host publication | Mantle Plumes |
| Subtitle of host publication | A Multidisciplinary Approach |
| Pages | 465-476 |
| Number of pages | 12 |
| ISBN (electronic) | 978-3-540-68046-8 |
| Publication status | Published - 2007 |
| Externally published | Yes |
Abstract
We study the gravity field of the western Rhenish Massif, Germany, to search for relationships to the mantle source of the recent Eifel volcanism. First we compile the available gravity data from the region and present them as Bouguer gravity map. This map does hardly show any anomaly univocally related to the Eifel plume, even after careful wavelength filtering the data. Forward modelling of the Bouguer gravity field with the seismological low-velocity anomaly in the upper mantle as input anomaly finds that the seismological model corresponds to an approximately -10 mGal anomaly (1 mGal is 10-5 m s-2). Such a tiny signal can be hardly recognized in the real data: Intrusions of magmatic high-density dykes and sills may even hide or reverse the expected negative mantle gravity signal which makes the situation even worse. As conclusion we find that a gravity signal of the Eifel plume cannot be seen in the available Bouguer data, but that this negative result is at least consistent with the seismological mantle models. Furthermore the forward modelling results suggest that small-scale upper mantle plumes may not be recognized as a Bouguer anomaly underneath a typical heterogeneous continental lithosphere.
ASJC Scopus subject areas
- Environmental Science(all)
- General Environmental Science
- Earth and Planetary Sciences(all)
- General Earth and Planetary Sciences
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Mantle Plumes: A Multidisciplinary Approach. 2007. p. 465-476.
Research output: Chapter in book/report/conference proceeding › Contribution to book/anthology › Research › peer review
}
TY - CHAP
T1 - Gravity Observations in the Western Rhenish Massif and Forward Modelling of the Eifel Plume Bouguer Anomaly
AU - Ritter, Joachim R.R.
AU - Mathar, Jan P.
AU - Jordan, Michael
AU - Gabriel, Gerald
PY - 2007
Y1 - 2007
N2 - We study the gravity field of the western Rhenish Massif, Germany, to search for relationships to the mantle source of the recent Eifel volcanism. First we compile the available gravity data from the region and present them as Bouguer gravity map. This map does hardly show any anomaly univocally related to the Eifel plume, even after careful wavelength filtering the data. Forward modelling of the Bouguer gravity field with the seismological low-velocity anomaly in the upper mantle as input anomaly finds that the seismological model corresponds to an approximately -10 mGal anomaly (1 mGal is 10-5 m s-2). Such a tiny signal can be hardly recognized in the real data: Intrusions of magmatic high-density dykes and sills may even hide or reverse the expected negative mantle gravity signal which makes the situation even worse. As conclusion we find that a gravity signal of the Eifel plume cannot be seen in the available Bouguer data, but that this negative result is at least consistent with the seismological mantle models. Furthermore the forward modelling results suggest that small-scale upper mantle plumes may not be recognized as a Bouguer anomaly underneath a typical heterogeneous continental lithosphere.
AB - We study the gravity field of the western Rhenish Massif, Germany, to search for relationships to the mantle source of the recent Eifel volcanism. First we compile the available gravity data from the region and present them as Bouguer gravity map. This map does hardly show any anomaly univocally related to the Eifel plume, even after careful wavelength filtering the data. Forward modelling of the Bouguer gravity field with the seismological low-velocity anomaly in the upper mantle as input anomaly finds that the seismological model corresponds to an approximately -10 mGal anomaly (1 mGal is 10-5 m s-2). Such a tiny signal can be hardly recognized in the real data: Intrusions of magmatic high-density dykes and sills may even hide or reverse the expected negative mantle gravity signal which makes the situation even worse. As conclusion we find that a gravity signal of the Eifel plume cannot be seen in the available Bouguer data, but that this negative result is at least consistent with the seismological mantle models. Furthermore the forward modelling results suggest that small-scale upper mantle plumes may not be recognized as a Bouguer anomaly underneath a typical heterogeneous continental lithosphere.
UR - http://www.scopus.com/inward/record.url?scp=80051660113&partnerID=8YFLogxK
U2 - 10.1007/978-3-540-68046-8_16
DO - 10.1007/978-3-540-68046-8_16
M3 - Contribution to book/anthology
AN - SCOPUS:80051660113
SN - 9783540680451
SP - 465
EP - 476
BT - Mantle Plumes
ER -