Eso es porque he tenido y tengo grandes maestros.
Ahí va un regalito (lo encontró mi tío en El Hierro las pasadas navidades)
https://picasaweb.google.com/bertopadron/EH1001?authkey=Gv1sRgCJvM_5OuuaSUiAE#5621341049200132242
Un abrazo,
José Alberto
El 23/06/2011 11:42 AM, Vicente López Sánchez-Vizcaíno escribió:
> 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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