Regional Gravity Anomalies Attributable to Basic Intrusions in Orogenic Belts
Large positive Bouguer anomalies overlie the coastal region of northern Norway. In terms of amplitude, extent and their location within an orogenic belt they resemble the Ivrea anomaly of the southern border region of the Alps (Closs 1965). This latter anomaly is interpreted as being due to a large...
| Published in: | Geophysical Journal International |
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| Main Author: | |
| Format: | Text |
| Language: | English |
| Published: |
Oxford University Press
1966
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| Online Access: | http://gji.oxfordjournals.org/cgi/content/short/12/1/29 https://doi.org/10.1111/j.1365-246X.1966.tb03099.x |
| Summary: | Large positive Bouguer anomalies overlie the coastal region of northern Norway. In terms of amplitude, extent and their location within an orogenic belt they resemble the Ivrea anomaly of the southern border region of the Alps (Closs 1965). This latter anomaly is interpreted as being due to a large basic intrusion which might have some direct causal relationship with the development of Alpine nappes (Closs 1965, p. 98). The Norwegian anomaly is similarly interpreted in terms of massive basic or ultra-basic bodies. These intrusions appear to pre-date considerably the late Caledonian development of overthrust tectonics but may well be related to nappe tectonics earlier than the main Caledonian metamorphism. |
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