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PhotosMaucherite - mixed w nickeline & cromite?

10th Aug 2020 08:05 UTCKaszon Kovacs

Maucherite

La Gallega Mine, Ojén lherzolite massif, Ojén, Málaga, Andalusia, Spain

I have a small doubt please.

Somebody knowledgeable about this site told me that currently I will not be able to find visible maucherite on the dumps. That it will only be micro grains surrounding nickeline grains (that is spread within cromite).

In historical pieces from this mine maucherite was maybe more abundant?

Or it was a special event to find it almos pure? ( Or is this piece maybe also somewhat mixed with nickeline and cromite?)

Do we have anybody out there familiar w the paragenesis of this mine?

Thanks a lot!

10th Aug 2020 08:57 UTCHerwig Pelckmans

Hi Kaszon,

Below is a good way to possibly find the information you are looking for. I wrote it in detail so everyone can see what we sometimes (have to) do to find answers to questions.

The question you ask is about a specific mineral from a specific location.

So go to the page of the mineral first, in this case:

https://www.mindat.org/min-2599.html

Since the question is about a specific location, go to the locality list:

https://www.mindat.org/min-2599.html#autoanchor18

There, you will find the location listed under Spain. For this mine, is mentioned:

- - - - La Gallega Mine

Am Min 57:3 pp 354-363; Econ Geol (1990) 85:112-132

The first reference is Am(erican) Min(eralogist) (Volume) 57: p(pages) 345-363. This is an old article in this periodical that is open access to everyone. These articles can be found on the server of the MSA (= Min. Soc. of America) :

http://www.minsocam.org/MSA/AmMin/TOC/

In their TOC (= Table Of Content), a link will take you to all the scanned articles of that year:

http://www.minsocam.org/msa/collectors_corner/amtoc/toc1972.htm

The article we look for is : http://www.minsocam.org/ammin/AM57/AM57_354.pdf

Even though it is on westerveldite, it has a lot of info on the maucherite associated with the former mineral. Reading this article might provide the answer you're looking for.

So let us know if it answered your question, please!

Cheers, Herwig

ACAM & MKA (Belgium)

10th Aug 2020 10:49 UTCKaszon Kovacs

Thank you so much Herwig for your detailed answer!

Super valuable process steps, I have taken good note of the free availability of old issues of this Journal.

I have now read the paragenesis and the formation chapters. It gave me really fascinating insights into the As-Fe-Ni system represented by the minerals in question. I see that maucherite is formed by transformation from nickeline.

I hope to pass by the dumps of this mine one day, for which this text is a very good backgroud.

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