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Polybasite : [Ag6Sb2S7][Ag9CuS4]

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Other keyboard shortcuts:

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Controls - Animation (Spin Rotation)

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For details about 3D refer to: Mindat manuals: Mindat Media Viewer: 3D

To enable/disable 3D stereo display of a compatible stereo pair image press the 3 key. If the left/right images are reversed on your display (this often happens in full-screen mode) press the 4 key to reverse them.

Controls - photo comparison mode

If a photo with activated comparison mode is opened in the viewer, the button appears in the bottom right corner giving access to "Comparison mode settings" menu.

Several layouts are supported: slider and side by-side comparison with up to 6 photos shown synchronously on the screen. On each of the compared photos a view selector is placed, e.g.:  Longwave UV ▼. It shows the name of currently selected view and allows to select a view for each placeholder.

Summary of all keyboard shortcuts

1Fit image to screen
2Fill screen with image
3Switch to 3D display of stereo pair
4Switch left/right images in 3D mode
5Display at full resolution
<, >Make background darker/lighter
H or ?Show/hide this help page
PPlay/Pause Video or Animation
[, ]Backwards/forwards one frame (Animation only)
spaceHide/dim titles and buttons
up arrowShow information box
down arrowHide information box
left arrowPrevious child photo
right arrowNext child photo
shift + left arrowPrevious image on the page
shift + right arrowNext image on the page


Copyright © Jeff Scovil
 
 
 
 
minID: 8FQ-GJL

Polybasite : [Ag6Sb2S7][Ag9CuS4]

Copyright © Jeff Scovil  - This image is copyrighted. Unauthorized reproduction prohibited.
Dimensions: 10 mm x 7 mm x 7 mm

A significant cluster of brightly irridescent (especially magenta and green) overlapping hexagonal bladed polybasite xl rosettes up to 16x14mm, with numerous fully terminated steel gray and brightly irridescent stephanite xls (up to 10x7x 7mm) on both ends of the cluster and intermixed with the polybasite blades; scattered around are clusters and sprays of white translucent barite?

4.4cm x2.1cm x2.4cm

In the Collection of Jim and Gail Spann

This photo has been shown 2286 times
Photo added:7th Sep 2010
Dimensions:1000x664px (0.66 megapixels)
Camera:NIKON D2Xs

Data Identifiers

Mindat Photo ID:332868 📋 (quote this with any query about this photo)
Long-form Identifier:mindat:1:4:332868:9 📋
GUID:36ccb254-574f-4622-8281-d5191925c11a 📋
Specimen MinID8FQ-GJL (note: this is not unique to this photo, it is unique to the specimen)

Discuss this Photo

PhotosPolybasite - Elsa Mine, Elsa, Galena Hill, Mayo Mining District, Yukon, Canada

11th Jan 2016 22:54 UTCRichard Gunter Expert

Are these not restricted to the Husky Mine?

12th Jan 2016 00:13 UTCReiner Mielke Expert

That is what I thought as well, at least in such good crystals.

12th Jan 2016 08:19 UTCAlfredo Petrov Manager

The Husky mine page does say: "There were occurrences of these irridescent crystals in other stopes, and indeed other mines in the camp, but little was saved."

12th Jan 2016 15:40 UTCRichard Gunter Expert

Hi Alfredo:


I have never seen them for sale from anywhere else. I wonder who sold this to the Spann's?

12th Jan 2016 16:22 UTCAlfredo Petrov Manager

Dealers are under intense pressure from their customers to give out more specific locality information than they have available. So if a field collector/miner brings them a polybasite from a generic "Elsa", and they've previously seen very similar looking pieces from the "Husky mine", then the new piece becomes "Husky mine" too. Unwarranted specificity, but that's human psychology :-S

So, the fact that almost all other pieces are sold labelled "Husky mine" is not necessarily evidence that they really all came from there (although they could have).

Another way the drive to unwarranted specificity works is that a piece labelled "Elsa" becomes "Elsa mine". Anyway, I'm just theorizing, not having any personal knowledge of the Yukon. Hopefully some Yukon expert like Mark Mauthner will chime in here with real data.

12th Jan 2016 19:12 UTCRichard Gunter Expert

Hi Alfredo:


You are quite correct with the locality information. The Husky Mine Polybasites seem very specific in their locality so Mark should know if Elsa produced anything significant. There was considerable mineralogical zonation in the Galena Hill camp and it was written up in the Canadian Mineralogist. The primary silver mineral was in the Tetrahedrite-Tennantite series with distinctive Sb:As ratios for the various deposits.

12th Jan 2016 21:25 UTCRob Woodside 🌟 Manager

Thanks Richard. We currently have posted at Galena Hill, ""The “galena mines” in the Keno Hill-Galena Hill area were really silver mines, with up to 200 or more oz Ag per ton of ore, most of it in galena." (Peter Tarassoff)"


Could you please supply the reference for, "The primary silver mineral was in the Tetrahedrite-Tennantite series with distinctive Sb:As ratios for the various deposits."


Mark handled most of the specimens and was very excited to get back a tetrahedrite that had been mistakenly labelled as something else. Very few specimens have survived.

12th Jan 2016 22:19 UTCRichard Gunter Expert

Hi Rob:


I will post the reference in the Galena Hill locality page.

13th Jan 2016 01:27 UTCRob Woodside 🌟 Manager

Thanks Richard
 
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