Crustal structure and magmatism of North Atlantic continental margins
Article Abstract:
Volcanic margins are characterized by the addition of large volumes of igneous rock to rifting continental crust, with thick adjacent oceanic crust. In contrast, non-volcanic margin rifting is accompanied by minor volcanism, with thin adjacent oceanic crust. The margin off Greenland, Norway and northwest Britain is an example of the former type, while the latter type occurs south off Spain and France. Volume and distribution of rift melt is determined by underlying mantle temperature and decompression, while igeneous distribution is controlled by melt rate and ease of intrusion.
Publication Name: Journal of the Geological Society
Subject: Earth sciences
ISSN: 0016-7649
Year: 1992
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Discussion on extensional tectonics and magmatism as drivers of convection leading to Iberian Pyrite Belt massive sulphide deposits?
Article Abstract:
The ore-fluid convection model is incompatible with the geology of the Iberian Pyrite Belt to accurately identify the mechanisms that caused massive sulphide deposits in the area. The model utilized the entrainment of formation water in flow driven by dikes and sea water convection as convective fluid flow mechanisms. High fluid pressures should have been used as an alternative mechanism for studying a large concentrated flux since the convective mechanisms only provide a large dispersed flux.
Publication Name: Journal of the Geological Society
Subject: Earth sciences
ISSN: 0016-7649
Year: 1996
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Carboniferous magmatism in the Iapetus convergence zone: evidence from deep seismic reflection profiles
Article Abstract:
An analysis of the North East Coast (NEC) deep seismic reflection profile's formation is presented. It is shown that seismic reflectors in the North Sea's UK region exhibit similar patterns with Carboniferous igneous intrusion processes and magmatic underplating in the Iapetus convergence zone. In addition, same-period igneous intrusions under Scotland likewise indicate a relation with the formation's crustal thickening.
Publication Name: Journal of the Geological Society
Subject: Earth sciences
ISSN: 0016-7649
Year: 1992
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