Re: For Ralph Nesbitt about mineralogical terms

From: jacques jedwab (jjedwab_at_ulb.ac.be)
Date: 12/28/04 

Date: 28 Dec 2004 08:25:52 GMT

.....

> Dear Mr Nesbitt,
>
>.........
> > Sergey
> >
> Ralph Nesbitt
>
>
> Thank you very much for your prompt. The matter was about
> interrelation in Russian and English terms. Your reference is very
> helpful in this sense, though I did not find there the term "mafic"
> which Carey used - that was my question. Could you tell, what means
> just "mafic" (in words either in composition percents). Now, the page
> you advised adds a question of term "aphanitic", which also is absent
> in the dictionary, to understand the correspondence in Russian. Could
> you also explain this last?
>
> Thank you,
>
> Sergey & Olga Karavashkin

Take any Geologicheskii Slovar (the one by Krishtofovicha,Moscow 1955, is
OK) and you find entries for : "mafityi", "maficheskyi
mineralyi"...Reference is to the words coined by Johannsen, q.v. The term
is a broad one, covering Mg-Fe magmas and minerals, as opposed to "sial,
sialic", covering Si-Al minerals and magmas, without precise percentile
compositions attached to the terms.

The mentioned Geol. Slovar has also entries for "afanerityi, afanitovyie
porodyi, afanitovaia struktura".

J.J.