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Lyon's Mineral Show
  
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chris
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PostPosted: Sep 28, 2014 13:49    Post subject: Lyon's Mineral Show  

MinéraLyon, the Lyon's Mineral Show will take place on November 7-9 in Lyon. This year, there will be a special exhibit of minerals from the Oisans, France and from La Mure coal mine which produced beautiful specimens of sphalerite, bournonite, tetrahedrite, ...

More info about the show at : https://www.mineralyon.fr/Index.html

I will try to write a report if I have time to attend the show.

Chris



MineraLyon - 39eme-salon-international.jpg
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 Viewed:  44529 Time(s)

MineraLyon - 39eme-salon-international.jpg



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PostPosted: Nov 09, 2014 12:28    Post subject: Re: Lyon's Mineral Show  

The Lyon's show took place this week-end. As usual, I didn't have time to take photos of the show itself (I'm too talkative for that), but I had the opportunity to take photos of the exhibits. This year it was Oisans & La Mure (which is a nearby mineral locality). Please note some photos have been digitally enhanced to correct my poor photographic skills. However these enhancements only match what the visitor would have seen if he had had the opportunity to visit the show.

The Oisans is a region located in the French Alps. It consists of 6 valleys corresponding to the drainage basin of the Romanche river and of its tributaries : Eau d'Olle, Lignare, Sarenne, Vénéon and Ferrand.

It covers parts of several massifs : Belledonne, Taillefer, Grandes Rousses, Arves and Ecrins. The Ecrins' part being a National Park, crystal hunters focus on the other massifs.

Gardette : gold mine operated from 1781. Even if it never produced much gold, it produced high quality quartz crystals with a metallic brightness to due growth streaks reflecting light at an unusual angle. Many exhibit the famous Dauphiné habit. These crystals sometimes have a 84°33 law referred as « La Gardette » and described by Weiss in 1829. More rarely, smoky quartz is found in association with the uranium bearing brannerite. Besides Quartz, the mine produced chalcopyrite, brannerite, ankerite, siderite, gold...

Challanches : operated from 1767 until the end of the 18th century. 10 tons of silver was extracted during that period, making the mine a rather small one compared with other silver mines. The antimony oxide Allemonite was identified for the first time in 1783. Even if most specimens of the 30 species recorded at the mines were not collectible grade, the area was so rich geologically speaking that the French School of Mines discussed the idea of opening an branch near the mine when it was operating.

Other worthy localities are Cornillon for epidote, Armentier and La Rampe des Commères for the axinite, La Combe de La Selle for prehnite...



Oisans.JPG
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 Viewed:  43995 Time(s)

Oisans.JPG


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PostPosted: Nov 09, 2014 12:34    Post subject: Re: Lyon's Mineral Show  

A couple of specimens for the Challanches. When possible the label is added to give the approximate size of the specimen...


argent_challanches.jpg
 Mineral: Silver
 Locality:
Les Chalanches Mine, Allemond (Allemont), Oisans-Romanche, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  44017 Time(s)

argent_challanches.jpg



quartz_epidote_challanches.jpg
 Mineral: Quartz, Epidote
 Locality:
Les Chalanches Mine, Allemond (Allemont), Oisans-Romanche, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  44022 Time(s)

quartz_epidote_challanches.jpg



Challanches.JPG
 Description:
Overview of the Challanches' area over Allemond in the Belledonne Massif.
 Viewed:  43956 Time(s)

Challanches.JPG


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PostPosted: Nov 09, 2014 12:50    Post subject: Re: Lyon's Mineral Show  

On the other side the the Romanche's valley, Cornillon produced mostly epidote, quartz, axinite.


axinite_epidote_cornillon.jpg
 Mineral: Axinite-(Fe), Epidote
 Locality:
Cime du Cornillon (Cornillon), Le Bourg d'Oisans, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  44209 Time(s)

axinite_epidote_cornillon.jpg



c_epidote_cornillion.jpg
 Mineral: Epidote
 Locality:
Cime du Cornillon (Cornillon), Le Bourg d'Oisans, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  44014 Time(s)

c_epidote_cornillion.jpg



c_epidote_cornillon.jpg
 Mineral: Epidote
 Locality:
Cime du Cornillon (Cornillon), Le Bourg d'Oisans, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  44050 Time(s)

c_epidote_cornillon.jpg



c_epidote_quartz_cornillon.jpg
 Mineral: Epidote, Quartz
 Locality:
Cime du Cornillon (Cornillon), Le Bourg d'Oisans, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  44401 Time(s)

c_epidote_quartz_cornillon.jpg



quartz_epidote_cornillion.jpg
 Mineral: Epidote, Quartz
 Locality:
Cime du Cornillon (Cornillon), Le Bourg d'Oisans, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  44055 Time(s)

quartz_epidote_cornillion.jpg



quartz_epidote_cornillon.jpg
 Mineral: Epidote, Quartz
 Locality:
Cime du Cornillon (Cornillon), Le Bourg d'Oisans, Isère, Auvergne-Rhône-Alpes, France
 Description:
Quartz with epidote inclusions
 Viewed:  44175 Time(s)

quartz_epidote_cornillon.jpg


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PostPosted: Nov 09, 2014 13:04    Post subject: Re: Lyon's Mineral Show  

On the way from Grenoble to Bourg d'Oisans, the visitor leaves the Lignare's Valley on his right. Near the Ornon's pass, some quartz was found.


quartz_ame_col_ornon.jpg
 Mineral: quartz
 Locality:
Col d'Ornon, Lignarre Valley, Ornon, Isère, Auvergne-Rhône-Alpes, France
 Description:
Faden quartz
 Viewed:  43968 Time(s)

quartz_ame_col_ornon.jpg


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PostPosted: Nov 09, 2014 13:17    Post subject: Re: Lyon's Mineral Show  

Just above Bourg d'Oisans in the municipality of Villard Notre Dame lays the most famous (gold) quartz mine of the French Alps: La Gardette. It produced impressive quartz specimens, and some other minerals as well.


Gardette.JPG
 Description:
One of the entrances of the now sealed mine.
 Viewed:  43917 Time(s)

Gardette.JPG



ga_quartz_brides.jpg
 Mineral: Quartz
 Locality:
La Gardette Mine, La Gardette mining area, Villard-Notre-Dame, Le Bourg d'Oisans, Grenoble, Isère, Auvergne-Rhône-Alpes, France
 Description:
This specimen is not from the main shaft but from a nearby one : Brides
 Viewed:  43956 Time(s)

ga_quartz_brides.jpg



ga_quartz_brides_2.jpg
 Mineral: Quartz
 Locality:
La Gardette Mine, La Gardette mining area, Villard-Notre-Dame, Le Bourg d'Oisans, Grenoble, Isère, Auvergne-Rhône-Alpes, France
 Description:
Same specimen from above
 Viewed:  43884 Time(s)

ga_quartz_brides_2.jpg



ga_quartz_gardette.jpg
 Mineral: Quartz
 Locality:
La Gardette Mine, La Gardette mining area, Villard-Notre-Dame, Le Bourg d'Oisans, Grenoble, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43874 Time(s)

ga_quartz_gardette.jpg



ga_quartz_gardette_.jpg
 Mineral: Quartz
 Locality:
La Gardette Mine, La Gardette mining area, Villard-Notre-Dame, Le Bourg d'Oisans, Grenoble, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43872 Time(s)

ga_quartz_gardette_.jpg



ga_quartz_gardette_2.jpg
 Mineral: Quartz
 Locality:
La Gardette Mine, La Gardette mining area, Villard-Notre-Dame, Le Bourg d'Oisans, Grenoble, Isère, Auvergne-Rhône-Alpes, France
 Description:
Japan Law or should I say "Mâcle de la Gardette" ?
 Viewed:  43927 Time(s)

ga_quartz_gardette_2.jpg



ga_quartz_gardette_3.jpg
 Mineral: Quartz
 Locality:
La Gardette Mine, La Gardette mining area, Villard-Notre-Dame, Le Bourg d'Oisans, Grenoble, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43909 Time(s)

ga_quartz_gardette_3.jpg



ga_quartz_gardette_4.jpg
 Mineral: Quartz
 Locality:
La Gardette Mine, La Gardette mining area, Villard-Notre-Dame, Le Bourg d'Oisans, Grenoble, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43954 Time(s)

ga_quartz_gardette_4.jpg


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PostPosted: Nov 09, 2014 13:25    Post subject: Re: Lyon's Mineral Show  

As I said earlier, La Gardette not only produced Quartz, but other mineral species as well such as:


ga_barite_chalco_gardette.jpg
 Mineral: Barite, Chalcopyrite
 Locality:
La Gardette Mine, La Gardette mining area, Villard-Notre-Dame, Le Bourg d'Oisans, Grenoble, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43956 Time(s)

ga_barite_chalco_gardette.jpg



ga_chalco_gardette.jpg
 Mineral: Chalcopyrite, Quartz
 Locality:
La Gardette Mine, La Gardette mining area, Villard-Notre-Dame, Le Bourg d'Oisans, Grenoble, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43887 Time(s)

ga_chalco_gardette.jpg



ga_chalco_malachite_gardette.jpg
 Mineral: Chalcopyrite, Malachite
 Locality:
La Gardette Mine, La Gardette mining area, Villard-Notre-Dame, Le Bourg d'Oisans, Grenoble, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43912 Time(s)

ga_chalco_malachite_gardette.jpg



ga_galene_or_quartz_fume_la_gardette.jpg
 Mineral: Galena, Quartz, Gold
 Locality:
La Gardette Mine, La Gardette mining area, Villard-Notre-Dame, Le Bourg d'Oisans, Grenoble, Isère, Auvergne-Rhône-Alpes, France
 Description:
A rare combination: galena on smoky quartz (smoky quartz is due to bannerite irradiation of quartz) and gold.
 Viewed:  43927 Time(s)

ga_galene_or_quartz_fume_la_gardette.jpg



ga_pyrite_chalco_gardette.jpg
 Mineral: Chalcopyrite, Pyrite
 Locality:
La Gardette Mine, La Gardette mining area, Villard-Notre-Dame, Le Bourg d'Oisans, Grenoble, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43919 Time(s)

ga_pyrite_chalco_gardette.jpg



ga_tetra_azurite_gardette.jpg
 Mineral: Tetrahedrite, Azurite
 Locality:
La Gardette Mine, La Gardette mining area, Villard-Notre-Dame, Le Bourg d'Oisans, Grenoble, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  44186 Time(s)

ga_tetra_azurite_gardette.jpg



ga_tetra_pseudo_azurite_gardette.jpg
 Mineral: Azurite after Tetrahedrite
 Locality:
La Gardette Mine, La Gardette mining area, Villard-Notre-Dame, Le Bourg d'Oisans, Grenoble, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  44236 Time(s)

ga_tetra_pseudo_azurite_gardette.jpg



ga_quartz_macle_gardette.jpg
 Mineral: Quartz
 Locality:
La Gardette Mine, La Gardette mining area, Villard-Notre-Dame, Le Bourg d'Oisans, Grenoble, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43875 Time(s)

ga_quartz_macle_gardette.jpg


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PostPosted: Nov 09, 2014 14:24    Post subject: Re: Lyon's Mineral Show  

The Grandes Rousses massif hosts the Alpes d'Huez ski resort. Famous for the Tour de France steep run, the massif also hosts several mineral spots. Amongst them Le Rocher de l'Armentier, La Balme d'Auris. These spots produced awesome axinite. Other minerals to note: Baryte, quartz, hematite, ...


Grandes_Rousses.JPG
 Description:
 Viewed:  43904 Time(s)

Grandes_Rousses.JPG



ar_axinite_armentier.jpg
 Mineral: Axinite-(Fe)
 Locality:
Rochers de l'Armentier, Le Bourg d'Oisans, Grenoble, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  44060 Time(s)

ar_axinite_armentier.jpg



ar_axinite_quartz_armentier.jpg
 Mineral: Axinite-(Fe), Quartz
 Locality:
Rochers de l'Armentier, Le Bourg d'Oisans, Grenoble, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43872 Time(s)

ar_axinite_quartz_armentier.jpg



ar_epidote_quartz_armentier.jpg
 Mineral: Epidote, Quartz
 Locality:
Rochers de l'Armentier, Le Bourg d'Oisans, Grenoble, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43855 Time(s)

ar_epidote_quartz_armentier.jpg



ba_axinite_balme_auris.jpg
 Mineral: Axinite-(Fe)
 Locality:
La Balme d'Auris, Le Bourg d'Oisans, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43798 Time(s)

ba_axinite_balme_auris.jpg



gr_hematite_grandes_rousses.jpg
 Mineral: Hematite
 Locality:
Alpe d'Huez, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43881 Time(s)

gr_hematite_grandes_rousses.jpg



gr_quartz_Alpes_huez.jpg
 Mineral: Quartz
 Locality:
Alpe d'Huez, Isère, Auvergne-Rhône-Alpes, France
 Description:
Even if it is less common than in the Mont-Blanc, you can sometimes find smoky quartz in the Grandes Rousses as illustrated by this very specimen
 Viewed:  43827 Time(s)

gr_quartz_Alpes_huez.jpg



GR_quartz_siderite_cassini.jpg
 Mineral: Quartz, Siderite
 Locality:
Croix de Cassini, Alpe d'Huez, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43843 Time(s)

GR_quartz_siderite_cassini.jpg



ri_barite_quartz_ribauds.jpg
 Mineral: Barite, Quartz
 Locality:
Le Ribaud, Le Bourg d'Oisans, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43855 Time(s)

ri_barite_quartz_ribauds.jpg



ri_quartz_chlorite_ribauds.jpg
 Mineral: Quartz, Chlorite
 Locality:
Le Ribaud, Le Bourg d'Oisans, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43929 Time(s)

ri_quartz_chlorite_ribauds.jpg



ri_quartz_vert_calcite_ribauds.jpg
 Mineral: Quartz, Calcite
 Locality:
Le Ribaud, Le Bourg d'Oisans, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43794 Time(s)

ri_quartz_vert_calcite_ribauds.jpg



quartz_hematite_grandes_rousses.jpg
 Mineral: Quartz, Hematite
 Locality:
Le Ribaud, Le Bourg d'Oisans, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43828 Time(s)

quartz_hematite_grandes_rousses.jpg


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PostPosted: Nov 09, 2014 14:31    Post subject: Re: Lyon's Mineral Show  

Facing La Balme d'Auris on the other side of the Romanche's valley, the nearby Rampe des Commères. It produced the same mineralogy as its counterpart on the other side. Higher quartz with chlorite phantoms is found around the Deux-Alpes Ski resort.


rc_axinite_calcite_rampe_commeres.jpg
 Mineral: Axinite-(Fe), Calcite
 Locality:
Rampe des Commères, Le Bourg d'Oisans, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43864 Time(s)

rc_axinite_calcite_rampe_commeres.jpg



rc_quartz_axinite_epidote_rampe_commeres.jpg
 Mineral: Quartz, Axinite-(Fe), Epidote
 Locality:
Rampe des Commères, Le Bourg d'Oisans, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43917 Time(s)

rc_quartz_axinite_epidote_rampe_commeres.jpg



2a_quartz_fantome_2_alpes.jpg
 Mineral: Quartz, Chlorite
 Locality:
Deux-Alpes, Le Bourg d'Oisans, Isère, Auvergne-Rhône-Alpes, France
 Description:
Typical quartz phantom from this locality
 Viewed:  43811 Time(s)

2a_quartz_fantome_2_alpes.jpg


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PostPosted: Nov 09, 2014 14:37    Post subject: Re: Lyon's Mineral Show  

Higher in the Romanche Valley towards Briançon, just above the Chambon's Dam, you enter the Ferrand's Valley. In this sedimentary part of the area you can find scepter quartz. When going back to the Romanche Valley the Briançon's road reaches an old mine : le Grand Clot.


quartz_sceptre_ferrand.jpg
 Mineral: Quartz
 Locality:
Vallée du Ferrand, Le Bourg d'Oisans, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43766 Time(s)

quartz_sceptre_ferrand.jpg



quartz_sceptre_ferrand_2.jpg
 Mineral: Quartz
 Locality:
Vallée du Ferrand, Le Bourg d'Oisans, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43805 Time(s)

quartz_sceptre_ferrand_2.jpg



galene_clots.jpg
 Mineral: Galena
 Locality:
Le Grand Clot Mine, La Grave, Briançon, Hautes-Alpes, Provence-Alpes-Côte d'Azur, France
 Description:
 Viewed:  43861 Time(s)

galene_clots.jpg


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PostPosted: Nov 09, 2014 14:52    Post subject: Re: Lyon's Mineral Show  

We leave the Romanche Valley and move west to another valley: the Vénéon Valley whose name comes from the stream flowing between it's steep slopes. Just above Bourg d'Arud, and at the entrance of the Ecrins National Park, stands a famous mineralogical spot : Le Plan du Lac.


pdl.JPG
 Description:
Rochers de l'Armentier, Le Bourg d'Oisans, Isère, Rhône-Alpes, France
 Viewed:  43826 Time(s)

pdl.JPG



pdl_anatase_plan_du_lac.jpg
 Mineral: Anatase
 Locality:
Plan-du-Lac, Saint Christophe en Oisans, Le Bourg d'Oisans Comune, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43763 Time(s)

pdl_anatase_plan_du_lac.jpg



pdl_anatase_plan_du_lac_2.jpg
 Mineral: Anatase
 Locality:
Plan-du-Lac, Saint Christophe en Oisans, Le Bourg d'Oisans Comune, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43738 Time(s)

pdl_anatase_plan_du_lac_2.jpg



pdl_anatase_plan_du_lac_3.jpg
 Mineral: Anatase
 Locality:
Plan-du-Lac, Saint Christophe en Oisans, Le Bourg d'Oisans Comune, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43782 Time(s)

pdl_anatase_plan_du_lac_3.jpg



pdl_quartz_ame_plan_du_lac.jpg
 Mineral: Quartz
 Locality:
Plan-du-Lac, Saint Christophe en Oisans, Le Bourg d'Oisans Comune, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  44113 Time(s)

pdl_quartz_ame_plan_du_lac.jpg



pdl_quartz_calcite_plan_du_lac.jpg
 Mineral: Quartz, Calcite
 Locality:
Plan-du-Lac, Saint Christophe en Oisans, Le Bourg d'Oisans Comune, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43768 Time(s)

pdl_quartz_calcite_plan_du_lac.jpg



pdl_rutile_anastase_plan_du_lac.jpg
 Mineral: Rutile, Anatase
 Locality:
Plan-du-Lac, Saint Christophe en Oisans, Le Bourg d'Oisans Comune, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43899 Time(s)

pdl_rutile_anastase_plan_du_lac.jpg



pdl_sphene_plan_du_lac.jpg
 Mineral: Titanite, Quartz
 Locality:
Plan-du-Lac, Saint Christophe en Oisans, Le Bourg d'Oisans Comune, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  44009 Time(s)

pdl_sphene_plan_du_lac.jpg


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chris
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PostPosted: Nov 09, 2014 15:02    Post subject: Re: Lyon's Mineral Show  

Up ahead, just above Saint Christophe en Oisans, lays the La Selle's Valley. It produced impressive prehnite. Crystal hunting is no longer possible in this valley.


La_Selle.JPG
 Description:
La Selle, Saint Christophe en Oisans, Isère, Rhône-Alpes, France.
Photo taken from La Toura, a peak located near Les Deux-Alpes ski resort topping 1000m above the valley floor.
 Viewed:  43709 Time(s)

La_Selle.JPG



ls_axinite_prehnite_la_selle_2.jpg
 Mineral: Axinite-(Fe), Prehnite
 Locality:
La Combe de la Selle, Saint-Christophe-en-Oisans, Le Bourg d'Oisans Comune, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43963 Time(s)

ls_axinite_prehnite_la_selle_2.jpg



ls_calcite_prehnite_la_selle.jpg
 Mineral: Calcite, Prehnite
 Locality:
La Combe de la Selle, Saint-Christophe-en-Oisans, Le Bourg d'Oisans Comune, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43710 Time(s)

ls_calcite_prehnite_la_selle.jpg



ls_epidote_la_selle.jpg
 Mineral: Epidote
 Locality:
La Combe de la Selle, Saint-Christophe-en-Oisans, Le Bourg d'Oisans Comune, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43720 Time(s)

ls_epidote_la_selle.jpg



ls_prehnite.jpg
 Mineral: Prehnite
 Locality:
La Combe de la Selle, Saint-Christophe-en-Oisans, Le Bourg d'Oisans Comune, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43643 Time(s)

ls_prehnite.jpg



ls_prehnite_adulaire_byssolite.jpg
 Mineral: Prehnite, Adularia, Actinolite (variety byssolite)
 Locality:
La Combe de la Selle, Saint-Christophe-en-Oisans, Le Bourg d'Oisans Comune, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43732 Time(s)

ls_prehnite_adulaire_byssolite.jpg



ls_prehnite_adulaire_epidote_byssolite.jpg
 Mineral: Prehnite, Adularia, Actinolite (variety byssolite)
 Locality:
La Combe de la Selle, Saint-Christophe-en-Oisans, Le Bourg d'Oisans Comune, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43818 Time(s)

ls_prehnite_adulaire_epidote_byssolite.jpg



ls_prehnite_axinite_la_selle.jpg
 Mineral: Prehnite, Axinite-(Fe)
 Locality:
La Combe de la Selle, Saint-Christophe-en-Oisans, Le Bourg d'Oisans Comune, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43731 Time(s)

ls_prehnite_axinite_la_selle.jpg



ls_prehnite_byssolite_la_selle.jpg
 Mineral: Prehnite, Actinolite (variety byssolite)
 Locality:
La Combe de la Selle, Saint-Christophe-en-Oisans, Le Bourg d'Oisans Comune, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43769 Time(s)

ls_prehnite_byssolite_la_selle.jpg



ls_prehnite_la_selle.jpg
 Mineral: Prehnite
 Locality:
La Combe de la Selle, Saint-Christophe-en-Oisans, Le Bourg d'Oisans Comune, Isère, Auvergne-Rhône-Alpes, France
 Description:
An old timer...
 Viewed:  43679 Time(s)

ls_prehnite_la_selle.jpg



ls_prehnite_la_selle_2.jpg
 Mineral: Prehnite
 Locality:
La Combe de la Selle, Saint-Christophe-en-Oisans, Le Bourg d'Oisans Comune, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43676 Time(s)

ls_prehnite_la_selle_2.jpg


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Michael Shaw
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PostPosted: Nov 09, 2014 16:35    Post subject: Re: Lyon's Mineral Show  

Thanks for the wonderful report Chris. The countryside there is gorgeous.
Michael
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PostPosted: Nov 09, 2014 18:27    Post subject: Re: Lyon's Mineral Show  

Great report, Chris. I am enjoying it very much.

Don

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PostPosted: Nov 09, 2014 18:30    Post subject: Re: Lyon's Mineral Show  

I agree with Michael - looks like a beautiful area to explore, and excellent mineral specimens. Thanks for taking the time to report on the show Christophe, it is much appreciated!
Mike :-)

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PostPosted: Nov 10, 2014 14:55    Post subject: Re: Lyon's Mineral Show  

Hello Folks,

Glad you like. The area is indeed a wonderland for both mineral collectors and hikers, climbers, bikers, ...

After having a look at the Alpin type minerals of Oisans, we are moving West to La Matheysine, an area located in the South of Grenoble whose largest city is La Mure.

Geologically speaking, the area is a part of the internal coal arc of the northern Alps running from Martigny in Switzerland to Saint-Arey in France. Its widest area is in La Mure where coal productive synclinals stand.

Coal is known from the inhabitants of the area since 1300. At that time it was mined in the traditional way. The industrial mining started at the beginning of the 19th century. La Mure's coal was high quality anthracite whose production topped at a 791 000 To/year in 1966. Anthracite was mostly mined from underground veins (even if coal outcrops were found around the boundaries of the small crystalline structure marking the area : Le dôme de la Mure). Unfortunately coal's consumption declined in France constantly in the 20th century forcing the mine to close in 1997.

But coal is not what made this mine interesting for the collector. Dating back to 1750, Dolomieu, spotted mineral species divided into two main groups :
- Minerals produced by flows though sedimentary rocks (coal, Trias, Lias) : calcite, dolomite, quartz crystals, gypsum, pyrite, siderite.
- Mesothermal veins related to schist and basement metamorphism. These species are associated to large faults leading to open breaks. These species are : sphalerite, pyrite, galena and associated minerals such as bournonite, panabase. The gangue is mainly Baryte, calcite and quartz.

Some parts of the mine produced remarkable mineralisations. For instance level 15 of the Villaret for the sphalerite or level 12 of Les Rioux for sphalerite, pyrite and galena. The complete mineral list is available on Mindat : https://www.mindat.org/loc-156437.html

Note : Unlike the localities of Oisans reported earlier, La Mure coal mine is large enough to extend beyond the city limit. Out of simplicity, locality will only be refered as to La Mure on most of the photos below. For more details, I invite the reader to have a closer look at the Google map (photo #2).

for further information : Le bassin houiller de la mure et ses minéraux par J. Haudour et J. Sarrot-Reynaud



La Mure.jpg
 Description:
La Mure plateau, Isère, Rhône-Alpes, France
 Viewed:  43214 Time(s)

La Mure.jpg



La Mure 2.jpg
 Description:
La Mure plateau, Isère, Rhône-Alpes, France.
Satellite image (C) Google.
 Viewed:  43261 Time(s)

La Mure 2.jpg



lm_aragonite_siderite_la_mure.jpg
 Mineral: Aragonite, Siderite
 Locality:
La Mure coal mines, La Mure, Matheysine-Trièves, Grenoble, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43155 Time(s)

lm_aragonite_siderite_la_mure.jpg



lm_bournonite_siderite_la_mure.jpg
 Mineral: Bournonite, Siderite
 Locality:
La Mure coal mines, La Mure, Matheysine-Trièves, Grenoble, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43181 Time(s)

lm_bournonite_siderite_la_mure.jpg



lm_bournonite_sphalerite_dolomite_la_mure.jpg
 Mineral: Bournonite, Sphalerite, Dolomite
 Locality:
La Mure coal mines, La Mure, Matheysine-Trièves, Grenoble, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43303 Time(s)

lm_bournonite_sphalerite_dolomite_la_mure.jpg



lm_bournonite_sphalerite_siderite_la_mure.jpg
 Mineral: Bournonite, Sphalerite, Siderite
 Locality:
La Mure coal mines, La Mure, Matheysine-Trièves, Grenoble, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43214 Time(s)

lm_bournonite_sphalerite_siderite_la_mure.jpg



lm_dolomite_siderite_la_mure.jpg
 Mineral: Dolomite, Siderite
 Locality:
La Mure coal mines, La Mure, Matheysine-Trièves, Grenoble, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43395 Time(s)

lm_dolomite_siderite_la_mure.jpg



lm_dolomite_siderite_quartz_la_mure.jpg
 Mineral: Dolomite, Siderite, Quartz
 Locality:
La Mure coal mines, La Mure, Matheysine-Trièves, Grenoble, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43179 Time(s)

lm_dolomite_siderite_quartz_la_mure.jpg



lm_gypse_la_mure.jpg
 Mineral: Gypsum
 Locality:
La Mure coal mines, La Mure, Matheysine-Trièves, Grenoble, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43277 Time(s)

lm_gypse_la_mure.jpg



lm_siderite_2.jpg
 Mineral: Siderite
 Locality:
La Mure coal mines, La Mure, Matheysine-Trièves, Grenoble, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43231 Time(s)

lm_siderite_2.jpg



lm_siderite_la_mure.jpg
 Mineral: Siderite
 Locality:
La Mure coal mines, La Mure, Matheysine-Trièves, Grenoble, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43148 Time(s)

lm_siderite_la_mure.jpg



lm_sphalerite_calcite_dolomite_la_mure.jpg
 Mineral: Sphalerite, Calcite, Dolomite
 Locality:
La Mure coal mines, La Mure, Matheysine-Trièves, Grenoble, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43178 Time(s)

lm_sphalerite_calcite_dolomite_la_mure.jpg



lm_sphalerite_dolomite_boulangerite_la_mure.jpg
 Mineral: Sphalerite, Dolomite (with Boulangerite inclusions)
 Locality:
La Mure coal mines, La Mure, Matheysine-Trièves, Grenoble, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43356 Time(s)

lm_sphalerite_dolomite_boulangerite_la_mure.jpg



lm_sphalerite_la_mure.jpg
 Mineral: Sphalerite
 Locality:
La Mure coal mines, La Mure, Matheysine-Trièves, Grenoble, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43282 Time(s)

lm_sphalerite_la_mure.jpg



lm_sphalerite_la_mure_2.jpg
 Mineral: Sphalerite
 Locality:
La Mure coal mines, La Mure, Matheysine-Trièves, Grenoble, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43265 Time(s)

lm_sphalerite_la_mure_2.jpg


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PostPosted: Nov 10, 2014 15:06    Post subject: Re: Lyon's Mineral Show  

To finish the report of this year's exhibit, some Baryte specimens found on the nearby municipality of Susville were displayed as well.

For those interested to learn more about both Oisans and La Mure I strongly recommend the visit of Bourg d'Oisans mineral musuem ( https://www.bourgdoisans.fr/spip.php?article138 ) or to read the book written by Seb ( https://www.mineral-forum.com/message-board/viewtopic.php?t=4119 ).

Cheers

Christophe



lm_tetra_la_mure.jpg
 Mineral: Tetrahedrite
 Locality:
La Mure coal mines, La Mure, Matheysine-Trièves, Grenoble, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43210 Time(s)

lm_tetra_la_mure.jpg



lm_tetra_la_mure_2.jpg
 Mineral: Tetrahedrite
 Locality:
La Mure coal mines, La Mure, Matheysine-Trièves, Grenoble, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43237 Time(s)

lm_tetra_la_mure_2.jpg



lm_tetra_sphalerite_siderite_la_mure.jpg
 Mineral: Tetrahedrite, Sphalerite, Siderite
 Locality:
La Mure coal mines, La Mure, Matheysine-Trièves, Grenoble, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43254 Time(s)

lm_tetra_sphalerite_siderite_la_mure.jpg



su_barite_sphalerite_susville.jpg
 Mineral: Barite, Sphalerite, Smithsonite
 Locality:
Le Villaret pit, Susville, Matheysine-Trièves, Grenoble, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43212 Time(s)

su_barite_sphalerite_susville.jpg



su_barite_susville.jpg
 Mineral: Barite
 Locality:
Le Villaret pit, Susville, Matheysine-Trièves, Grenoble, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43130 Time(s)

su_barite_susville.jpg



su_barite_susville_2.jpg
 Mineral: Barite
 Locality:
Le Villaret pit, Susville, Matheysine-Trièves, Grenoble, Isère, Auvergne-Rhône-Alpes, France
 Description:
 Viewed:  43210 Time(s)

su_barite_susville_2.jpg


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