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Muy buen respuesta, sí señor. Te estás convirtiendo en un grande de la petrología. Un abrazo Vicente El 22/06/2011 14:17, José Alberto Padrón-Navarta escribió: > Dear Trisrota, > To my knowledge you have a good chance to discriminate them just > looking at the texture itself and the mineral assemblage. 'Real' > spinifex texture olivine is needle-like or bladed, but most commonly > skeletal or feathery. Spinifex-like or pseudospinifex olivine > (metamorphic origen) is needle-like or bladed, but no skeletal nor > feathery. Moreover in the pseudospinifex there is no glass in the > matrix and used to have other hydrous primary minerals like talc, > chlorite and tremolite. > > There is a vast literature for the 'real' spinifex texture. For > metamorphic spinifex-like texture you may be referred to Oliver et al. > 1972, Evans and Trommsdorff , 1974, Snoke and Calk, 1978, Bakke and > Korneliussen, 1986, Trommsdorff et al. 1998, Padrón-Navarta et al. 2010. > > Good luck, > Cheers, > > José Alberto Padrón-Navarta > Departamento de Mineralogía y Petrología > Universidad de Granada, > Spain > > > El 22/06/2011 1:17 PM, Trisrota Chaudhuri escribió: >> >> Dear all, >> Please forgive my ignorance. But can please let me know how to >> demarcate between spinifex textured olivine and aciclar metamorphic >> olivine? Is there any textural or distinct mineral association? >> Best Regards, >> -- >> Trisrota Chaudhuri, >> JRF of Indian Statistical Institute and Jadavpur University, >> Kolkata, India. >> >