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Shallow level dykes and other mafic intrusions of this size are very common but usually classified as dolerite, even when they have quite coarse patches. regards Ralph Bottrill Mineral Resources Tasmania 03 6233 8359 -----Original Message----- From: Metamorphic Studies Group [mailto:[log in to unmask]] On Behalf Of Christian Nicollet Sent: Friday, 30 March 2007 02:00 To: [log in to unmask] Subject: Re: gabbroic intrusions Prof. J. D. Clemens a écrit : > G'day Mazza, > My guess is that people who study gabbroic intrusions would turn > up their noses when faced with piddling 1 km-sized bodies. Therein may > lie your problem. > All the best, > JC Are few meter large gabbroic dykes (in mantle) intrusions with diameter < 1km ????