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Poudrette Quarry: Carletonite
  
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Roger Warin




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PostPosted: May 29, 2023 04:28    Post subject: Poudrette Quarry: Carletonite  

Hello,
It seems important to me to talk about carletonite, this mineral currently flooded in Poudrette quarry, Mont St Hilaire, Quebec.
In addition, the use of the binocular was essential.



01-Carletonite#A1_R.jpg
 Mineral: Carletonite
 Locality:
Poudrette Quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
 Description:
 Viewed:  15363 Time(s)

01-Carletonite#A1_R.jpg



02-Carletonite#4-01-ABC-2_R.jpg
 Mineral: Carletonite
 Locality:
Poudrette Quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
 Description:
 Viewed:  15382 Time(s)

02-Carletonite#4-01-ABC-2_R.jpg



03-Carletonite#1-1ABC-1_R.jpg
 Mineral: Carletonite
 Locality:
Poudrette Quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
 Description:
a nice tetragonal prism
 Viewed:  15405 Time(s)

03-Carletonite#1-1ABC-1_R.jpg



04-Carletonite#2-1ABC_R.jpg
 Mineral: Carletonite
 Locality:
Poudrette Quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
 Description:
bevel on edge
Miller indices ?
 Viewed:  15336 Time(s)

04-Carletonite#2-1ABC_R.jpg



05-Carletonite#5-1ABC-1a_R.jpg
 Mineral: Carletonite
 Locality:
Poudrette Quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
 Description:
with feldspar, microcline ?
 Viewed:  15376 Time(s)

05-Carletonite#5-1ABC-1a_R.jpg



06-Carletonite#6-1ABC-1b_R1.jpg
 Mineral: Carletonite
 Locality:
Poudrette Quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
 Description:
 Viewed:  15385 Time(s)

06-Carletonite#6-1ABC-1b_R1.jpg



07-Carletonite#8-01a_R.jpg
 Mineral: Carletonite
 Locality:
Poudrette Quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
 Description:
another prism, a nice classic view
 Viewed:  15382 Time(s)

07-Carletonite#8-01a_R.jpg


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Roger Warin




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PostPosted: Jun 29, 2023 09:06    Post subject: Poudrette Quarry (continued) : Leifite  

The Poudrette Quarry at Mont-Saint-Hilaire in Quebec is a great exception for mineralogists. Alas, this great quarry complex is now drowned.
This alkaline igneous intrusion is not embedded in a mass of silica (quartz) and many very different silicates could have developed, trapping alkaline cations at a high level and also beryllium. The Si and Al concentrations are low. Quartz is missing.
Leifite is a rare but unusual tectosilicate: it forms the leifite group.
Leifite often occurs as fibroradiated aggregates of hexagonal, colorless or greyish prisms.
Such an aggregate (4cm wide) is found at the foot of the main serandite crystal. He is not very photogenic.
The following pictures show the reverse side of a master piece of serandite, of which we do not pay attention to the whitish gangue of feldspars (albite) pierced with black needles of aegirine.



Leifite-on-serandite#9-bd_R.jpg
 Mineral: Leifite with Serandite
 Locality:
Poudrette Quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
 Description:
Hexagonal prisms
 Viewed:  14821 Time(s)

Leifite-on-serandite#9-bd_R.jpg



Leifite-on-serandite#8-C_R.jpg
 Mineral: Leifite with Serandite
 Locality:
Poudrette Quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
 Description:
another aspect of aggregate
 Viewed:  14800 Time(s)

Leifite-on-serandite#8-C_R.jpg



Serandite-Leifite-#10-AB-b_R.jpg
 Mineral: Leifite on Serandite
 Locality:
Poudrette Quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
 Description:
on serandite crystals, same area with binocular
reverse view
 Viewed:  14795 Time(s)

Serandite-Leifite-#10-AB-b_R.jpg



Serandite-Leifite-#1a_R.jpg
 Mineral: Leifite on Serandite
 Locality:
Poudrette Quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
 Description:
 Viewed:  14771 Time(s)

Serandite-Leifite-#1a_R.jpg



Serandite-Leifite-#2AB_R.jpg
 Mineral: Leifite on Serandite
 Locality:
Poudrette Quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
 Description:
a micro Master piece of leifite
 Viewed:  14818 Time(s)

Serandite-Leifite-#2AB_R.jpg



Serandite-Leifite-#5-1a_R.jpg
 Mineral: Albite with Aegirine
 Locality:
Poudrette Quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
 Description:
with aegyrine
Back ground
 Viewed:  14789 Time(s)

Serandite-Leifite-#5-1a_R.jpg


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Roger Warin




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PostPosted: Aug 09, 2023 00:13    Post subject: Re: Poudrette Quarry: Carletonite  

About Poudrette Quarry
I examine again my specimens from Mont St Hilaire, an exceptionally remarkable site, because there is relatively little silicon and so you escape the quartz.
A large sample of analcime from Poudrette Quarry bears crystals of natrolite and rhodochrosite.
On the back side are a few large broken needles of black aegirine (ex acmite). Or arfvedsonite, an amphibole.
While handling the specimen, a small shard broke off. A priori I thought of a burst of rhodochrosite.
In fact, it is a pyroxene, tan in color with strong refractivity and high relief. What is it? I'm thinking aegirine.



Poudrette#1_R.jpg
 Mineral: Aegirine
 Locality:
Poudrette Quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
 Description:
is it an aegirine ?
shot in cross polarized light
FOV: 0.45mm
 Viewed:  13989 Time(s)

Poudrette#1_R.jpg


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Roger Warin




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PostPosted: Aug 27, 2023 07:32    Post subject: Re: Poudrette Quarry: Carletonite  

Poudrette Quarry, Mont Saint Hilaire, Quebec.
Continuing to explore cabinet-sized specimens, I observed a curious rhodochrosite. Its habit is that of an iron rose. Mindat does not show this aspect, I think.
One question remains: do you confirm the name of the species?



Analcime#1_R.jpg
 Mineral: Analcime
 Locality:
Poudrette Quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
 Description:
specimen width ~185 mm
 Viewed:  13052 Time(s)

Analcime#1_R.jpg



2023-08-21 10-39-31-Rhodo_Poudrette#1-01-a_R.jpg
 Mineral: Rhodochroriste
 Locality:
Poudrette Quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
 Description:
 Viewed:  12981 Time(s)

2023-08-21 10-39-31-Rhodo_Poudrette#1-01-a_R.jpg



2023-08-21 10-39-31-Rhodo_Poudrette#3-01-part_R.jpg
 Mineral: Rhodochrosite
 Locality:
Poudrette Quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
 Dimensions: FOV ~3 cm
 Description:
 Viewed:  13040 Time(s)

2023-08-21 10-39-31-Rhodo_Poudrette#3-01-part_R.jpg


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Tobi
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PostPosted: Aug 27, 2023 08:42    Post subject: Re: Poudrette Quarry: Carletonite  

Roger Warin wrote:
I observed a curious rhodochrosite. Its habit is that of an iron rose. Mindat does not show this aspect, I think.One question remains: do you confirm the name of the species?
Hi Roger, I can't "confirm" it, but I would not doubt this is rhodochrosite. I have seen rhodos from Poudrette Quarry with a habit like this. And the colour would be also typical for many many Poudrette rhodos.

So for what I know about that locality, yes this could be rhodochrosite without a doubt :-)

Regards
Tobi

P.S. I have to correct you about Mindat, there are several photos that show exactly this kind of rhodo:

https://www.mindat.org/photo-84598.html
https://www.mindat.org/photo-703498.html
https://www.mindat.org/photo-43984.html
https://www.mindat.org/photo-395220.html
and for sure some more ;-)
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Pete Richards
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PostPosted: Aug 27, 2023 12:58    Post subject: Re: Poudrette Quarry: Carletonite  

I concur. This is probably rhodochrosite, which was found often at the Poudrette Quarry, including in this habit. Warm hydrochloric acid on a little flake would confirm that it's a carbonate, and that would about rule out any other alternatives. The most likely alternative would be pyrophanite, which occurs in rosettes but with a much more adamantine luster, and of course is not a carbonate.
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Collecting and studying crystals with interesting habits, twinning, and epitaxy
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PostPosted: Aug 30, 2023 08:10    Post subject: Re: Poudrette Quarry: Carletonite  

Thanks Tobi for your insight. These are also beautiful photos.
Thank you Pete for your comments as always relevant.
Although its molecule is simple, I did not know pyrophanite.
Here are some more photos of leifite, before returning to serandite whose crystals are frequently equant and idiomorphic.
I don't really understand the nature of the driving force that leads to fibroradiated aggregates.



Leifite#1-01-b_R.jpg
 Mineral: Leifite
 Locality:
Poudrette Quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
 Description:
 Viewed:  12481 Time(s)

Leifite#1-01-b_R.jpg



Leifite#2-01ABCD.jpg
 Mineral: Leifite
 Locality:
Poudrette Quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
 Description:
 Viewed:  12539 Time(s)

Leifite#2-01ABCD.jpg



Leifite-2C_R.jpg
 Mineral: Leifite
 Locality:
Poudrette Quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
 Description:
 Viewed:  12489 Time(s)

Leifite-2C_R.jpg



Leifite_Da_R.jpg
 Mineral: Leifite
 Locality:
Poudrette Quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
 Description:
 Viewed:  12471 Time(s)

Leifite_Da_R.jpg



Leifite_70889_R.jpg
 Mineral: Leifite
 Locality:
Poudrette Quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
 Description:
 Viewed:  12473 Time(s)

Leifite_70889_R.jpg



Leifite_R.jpg
 Description:
 Viewed:  12495 Time(s)

Leifite_R.jpg


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Roger Warin




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PostPosted: Oct 16, 2023 11:59    Post subject: Re: Poudrette Quarry: Carletonite  

A little perfection in this quite rare assembly:
Serandite, twin on (110).
The 2 twins of serandite have been wonderfully described by Peter Richards.
R.Peter Richards, “Twin laws for serandite from Mont-Saint-Hilaire, Quebec”
Rocks & Minerals, 66, n°1, p. 44 (1991).

The front faces are not in the same plane
The angle is close to 8°.



Serandite-2-_R.jpg
 Mineral: Serandite
 Locality:
Poudrette Quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
 Description:
Rare twin
 Viewed:  9265 Time(s)

Serandite-2-_R.jpg



Serandite-3.jpg
 Mineral: twin on (110)
 Locality:
Poudrette Quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
 Description:
twin on (110)
 Viewed:  9189 Time(s)

Serandite-3.jpg


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