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Improving Mindat.orgMore suspicious pyrope

6th Jan 2017 13:02 UTCReiner Mielke Expert

http://www.mindat.org/loc-209832.html looks like typical almandine in biotite schist to me.

6th Jan 2017 13:37 UTCUwe Kolitsch Manager

The cited paper says:

(...)

"The peridotite garnet displays pyrope contents of 67±73 mol %. The remainder consists mainly of almandine (15±19 mol %) and grossular (2±8 mol %). The Cr2O3 varies up to concentrations of 2 wt %. The garnet composition in the pyroxenite is nearly identical to that in the peridotites, the only difference being considerably lower Cr2O3 contents, around 0.1 wt %. The analysed garnets are relatively homogeneous (...)

6th Jan 2017 13:44 UTCDavid Von Bargen Manager

Well, if you look at the article written about the location you would find that the rocks are pyrope bearing peridotites. The garnet in the garnetites are more or less in the middle of pyrope, grossular and almandine.

https://www.researchgate.net/publication/225693806_Garnet-bearing_ultramafic_rocks_from_the_Erzgebirge_and_their_relation_to_other_settings_in_the_Bohemian_Massif
 
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