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La Fourque granodiorite outcrop, Salau, Seix, Cauflens, Ariège, Occitanie, France

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Location is approximate, estimate based on other nearby localities.
Latitude & Longitude (WGS84): 42° 45' 0'' North , 1° 7' 59'' East (est.)
Margin of Error:~0km
Other regions containing this locality:Iberian Peninsula
Locality type:Outcrop
Köppen climate type:Cfb : Temperate oceanic climate
Other/historical names associated with this locality:Midi-Pyrénées

Located South of Salau village, in Haute Vallée du Salat.

Granodiorite and quartz diorite massif (1.2 km2) intruded in Lower/Middle Paleozoic sandstones, pelites and limestones metamorphized into graphitic marbles.

Complex alteration :
- Albitization (replaces granodiorite plagioclases)
- Chloritization (chlorite + sagenite in cleavages replace granodiorite biotites)
- Epidotization (clinozoisite, pyrrhotite and chalcopyrite replacing granodiorite plagioclases and biotite)
- Microclinization (microcline replaces granodiorite plagioclase and quartz after epidotization phase)
- Silicification (quartz, scheelite, arsenopyrite) associated with mylonitization
- Muscovitization

Presence of tension fractures filled with black quartz + arsenopyrite + scheelite or with almandine + hedenbergite.
Presence of inverse shear fractures filled with calcite + quartz + apophyllite + chalcopyrite + galena + sphalerite.

Important contact metamorphism in marbles (diopside, vesuvianite, grossular, tremolite, calcite, clinozoisite and quartz) and metapelites (tremolite, albite, chlorite, clinozoisite and biotite).

Mineral List

27 valid minerals.

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This page contains all mineral locality references listed on This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.


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Bull. Minéral. 110 (1987), 633-644.

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