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.
>>
>
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