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I agree entirely with Eric, both with regard to the epidotes and allanites report and more generally. I have felt for years (decades?) that the IMA has NOT served our community well, and particularly not the petrologic community. As an example, I continue proudly to use the terms "sphene" and "hypersthene", although they have been officially banned by the IMA nomenclature police. I well understand the need for clear and unambiguous nomenclature to promote efficiency and accuracy of scientific communication, and the IUGS igneous rock nomenclature commissions by and large did a very good job of cleaning up the naming of igneous rocks in the 1970s and 1980s. But I would like to have someone who approves of IMA's work to explain to me what is either ambiguous or unclear about sphene or hypersthene. If recommended nomenclature rules do not serve the two simple ends of promoting conciseness and a lack of ambiguity, then they are likely to be arbitrary and probably are unnecessary. There is nothing wrong with committees or commissions making /recommendations/, but I particularly like Eric's suggestion that members of the relevant scientific societies should put these recommendations to a vote by the parties who will have to use them before such recommendations become official or editorial policy. Bob T. Eric Essene wrote: > All, > But is a stupid report. It should be voted on by the entire > membership, not a small committee. Or have we turned to a dictatorial > structure entirely? Who is in charge here? > eric > > > > On Feb 12, 2010, at 5:33 AM, Christian Chopin, ENS wrote: > >> Dear Shreya, >> >> you may find a good tutorial on how to handle EMP analyses of >> epidotes and allanites in the report of the IMA epidote nomenclature >> committee, attached and available at >> http://eurjmin.geoscienceworld.org/cgi/reprint/18/5/551 >> and a few more allanite-group minerals described in the attached paper. >> With best wishes >> Christian Chopin >> >> Shreya Karmakar a écrit : >>> Dear All, >>> I am working on characterisation of REE minerals (allanite, >>> monazite, pyrochlore,apatite) as part of my M.Sc. dissertation. It >>> would be very helpful if anyone could please refer me to or send me >>> some papers on geochemical analyses of allanite (using EPMA data) >>> and its classification specially.. Regards, >>> Shreya. >> >> >> -- >> ============================================== >> Christian Chopin [log in to unmask] >> Laboratoire de Geologie fax: +33 1 44 32 20 00 >> Ecole normale superieure >> 24 rue Lhomond >> 75005 Paris, France >> http://www.geologie.ens.fr/ >> >> European Journal of Mineralogy website: >> http://eurjmin.geoscienceworld.org/ >> http://www.schweizerbart.de/journals/ejm >> European Mineralogical Union website: >> http://www.univie.ac.at/Mineralogie/EMU/ >> ============================================== >> > -- Dr. Robert J. Tracy Professor of Geosciences Department of Geosciences 5064 Derring Hall, Virginia Tech Blacksburg VA 24061-0420 Office Phone: 540-231-5980 Fax: 540-231-3386 e-mail: [log in to unmask]