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Woody Thompson
Joined: 08 Mar 2010
Posts: 60
Location: Maine
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 Posted: Jan 30, 2016 08:15 Post subject: Re: A. E. Seaman Mineral Museum, Michigan Technological Univ., Houghton, Michigan |
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| That huge copper slab has a patina and prominent parallel grooves on one side (clearly seen in the "Precise" photo showing the slab about to be hoisted into place). Being a Pleistocene geologist, I wonder if they're glacial grooves (value added!!) ? Or maybe slickensides?
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Susan Robinson
Joined: 05 Aug 2010
Posts: 163
Location: Hancock, MI
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| Posted: Jan 30, 2016 10:48 Post subject: Re: A. E. Seaman Mineral Museum, Michigan Technological Univ., Houghton, Michigan |
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Some sheets of copper from the Nonesuch shale from the White Pine mine that may be slickensides, but the large pieces of float copper which show prominent grooves in them are most likely from glacial action.
George Robinson
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Woody Thompson
Joined: 08 Mar 2010
Posts: 60
Location: Maine
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| Posted: Jan 30, 2016 15:18 Post subject: Re: A. E. Seaman Mineral Museum, Michigan Technological Univ., Houghton, Michigan |
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| Thanks, George! Few mineral "specimens" of any size survive the glacial grinding mill. The glacial markings really do add a lot of interest to this already remarkable copper.
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John Jaszczak
Joined: 05 Oct 2010
Posts: 300
Location: Hancock, MI
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| Posted: Jan 30, 2016 18:39 Post subject: Re: A. E. Seaman Mineral Museum, Michigan Technological Univ., Houghton, Michigan |
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Hi Woody. You should come and visit us and see it in person! - John
_________________
Adjunct Curator, A. E. Seaman Mineral Museum
Professor of Physics
Michigan Technological University |
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Woody Thompson
Joined: 08 Mar 2010
Posts: 60
Location: Maine
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| Posted: Jan 30, 2016 21:04 Post subject: Re: A. E. Seaman Mineral Museum, Michigan Technological Univ., Houghton, Michigan |
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Yes, we really must get out there for a visit. Thanks, John!
Woody
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Robert Seitz
Joined: 29 Dec 2015
Posts: 261
Location: Phoenix, AZ
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| Posted: Jan 30, 2016 21:11 Post subject: Re: A. E. Seaman Mineral Museum, Michigan Technological Univ., Houghton, Michigan |
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| Great mineral museum. I have been in Houghton on recruiting trips about 2 X yearly for last several years & try to visit each time. Good to see what's new as well as old favorites.
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John Jaszczak
Joined: 05 Oct 2010
Posts: 300
Location: Hancock, MI
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| Posted: Feb 13, 2016 10:44 Post subject: Re: A. E. Seaman Mineral Museum, Michigan Technological Univ., Houghton, Michigan |
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The Royal Ontario Museum and the A. E. Seaman Mineral Museum collaborated on this display at the 2016 Tucson Gem and Mineral Show.
| Mineral: | Smithsonite |
| Locality: | | Masua Mine, Masua, Iglesias, Sud Sardegna Province, Sardinia/Sardegna, Italy |  |
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| Description: |
| The two halves of this stalactite were separated in 1956 and are here reunited for the first time. The piece on the right is part of the University of Michigan Mineral Collection (and curated by the A. E. Seaman Mineral Museum under the new Michigan Mineral Alliance) |
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39491 Time(s) |
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_________________
Adjunct Curator, A. E. Seaman Mineral Museum
Professor of Physics
Michigan Technological University |
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John Jaszczak
Joined: 05 Oct 2010
Posts: 300
Location: Hancock, MI
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| Posted: Feb 13, 2016 22:19 Post subject: Re: A. E. Seaman Mineral Museum, Michigan Technological Univ., Houghton, Michigan |
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Associate Curator Christopher Stefano assembled a case of great minerals donated to the museum by Paul and Janet Clifford (Cleveland, Ohio) to display this year in Tucson. I have known Paul and Janet since about 1980. Sorry they couldn't make it to Tucson this year. We appreciate their support.
| Description: |
| Selection of minerals donated by Paul and Janet Clifford to the museum. |
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39471 Time(s) |
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_________________
Adjunct Curator, A. E. Seaman Mineral Museum
Professor of Physics
Michigan Technological University |
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Jamison Brizendine
Joined: 27 Feb 2014
Posts: 128
Location: Northeast Ohio
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| Posted: Feb 15, 2016 10:46 Post subject: Re: A. E. Seaman Mineral Museum, Michigan Technological Univ., Houghton, Michigan |
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Hi John,
Thanks for posting the specimens that the Clifford's donated! I know both of them through our club in Cleveland, Ohio.
I will let them know that you posted a picture of some of their specimens, I think they would appreciate it. I would like to see more of their collection if you have some spare time. They have an outstanding collection.
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John Jaszczak
Joined: 05 Oct 2010
Posts: 300
Location: Hancock, MI
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| Posted: Mar 31, 2016 11:29 Post subject: Re: A. E. Seaman Mineral Museum, Michigan Technological Univ., Houghton, Michigan |
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A famous specimen of silver crystals on copper formerly in the John T. Reeder collection.
| Mineral: | Silver on Copper |
| Locality: | | Kearsarge Mine, Kearsarge, Houghton County, Michigan, USA | |
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| Dimensions: | 5.8 cm wide |
| Description: |
| Excellent elongated silver crystals on a base of copper that was chiseled off of a larger mass. |
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38621 Time(s) |
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_________________
Adjunct Curator, A. E. Seaman Mineral Museum
Professor of Physics
Michigan Technological University |
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John Jaszczak
Joined: 05 Oct 2010
Posts: 300
Location: Hancock, MI
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| Posted: Apr 03, 2016 20:40 Post subject: Re: A. E. Seaman Mineral Museum, Michigan Technological Univ., Houghton, Michigan |
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Congratulations to Bruce Cairncross on his fine Connoisseur's Choice article on Shigaite in the March/April 2016 issue of Rocks and Minerals. A few specimens of Shigaite and associated minerals from Michigan's iron district, which are in the museum's collection, were featured. Here are a few photos of specimens in the article and a few extras.
| Mineral: | Shigaite |
| Locality: | | Bengal Mine, Stambaugh, Menominee Iron Range, Iron County, Michigan, USA | |
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| Dimensions: | 1-cm wide crystal |
| Description: |
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38088 Time(s) |
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| Mineral: | Shigaite |
| Locality: | | Bengal Mine, Stambaugh, Menominee Iron Range, Iron County, Michigan, USA | |
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| Dimensions: | 6-mm wide crystal |
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38004 Time(s) |
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| Mineral: | Shigaite with Seamanite (pink) |
| Locality: | | Bengal Mine, Stambaugh, Menominee Iron Range, Iron County, Michigan, USA | |
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| Description: |
| DM27928 Same specimen as above at lower magnification to also show an associated spray of pink Seamanite crystals with the Shigaite. |
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38174 Time(s) |
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| Mineral: | Seamanite |
| Locality: | | Bengal Mine, Stambaugh, Menominee Iron Range, Iron County, Michigan, USA | |
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| Dimensions: | ~ 5-mm-wide crystal group |
| Description: |
| DM27928 Same specimen as above showing the pink Seamanite crystals in more detail, associated with Shigaite. |
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38022 Time(s) |
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| Mineral: | Shigaite with Rhodochrosite |
| Locality: | | Bengal Mine, Stambaugh, Menominee Iron Range, Iron County, Michigan, USA | |
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| Dimensions: | largest shigatite crystals ~ 5 mm |
| Description: |
| DM30819 Shigaite crystals associated with Rhodochrosite crystals. |
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38032 Time(s) |
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_________________
Adjunct Curator, A. E. Seaman Mineral Museum
Professor of Physics
Michigan Technological University |
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Jordi Fabre
Overall coordinator of the Forum
Joined: 07 Aug 2006
Posts: 5029
Location: Barcelona
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| Posted: Apr 04, 2016 04:39 Post subject: A. E. Seaman Mineral Museum - Shigaite from the Bengal Mine |
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| John Jaszczak wrote: | | Congratulations to Bruce Cairncross on his fine Connoisseur's Choice article on Shigaite in the March/April 2016 issue of Rocks and Minerals. A few specimens of Shigaite and associated minerals from Michigan's iron district, which are in the museum's collection, were featured. Here are a few photos of specimens in the article and a few extras. |
Absolutely, a great job from Bruce! Congratulations to him as well as the Seaman Museum to own so fine specimens.
Here is the article (partial content, full article only for subscribers of the fine Rocks&Minerals magazine) -> Connoisseur's Choice: Shigaite, Kalahari Manganese Field, Northern Cape Province, South Africa
BTW, thanks also to John Jaszczak to publish here the photos as well as always share news from the A. E. Seaman Mineral Museum with the mineralogical community.
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John Jaszczak
Joined: 05 Oct 2010
Posts: 300
Location: Hancock, MI
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| Posted: Apr 06, 2016 09:23 Post subject: Re: A. E. Seaman Mineral Museum, Michigan Technological Univ., Houghton, Michigan |
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Sulfides from Merelani tanzanite district, Tanzania.
The Mineralogical Record published a paper on “Spectacular sulfides from the Merelani tanzanite deposit, Lelatema Mountains [S. Harrison, et. al. 45, 553-570 (2014).] that featured some specimens in the museum's collection.
We featured our wurtzite earlier on these pages
https://www.mineral-forum.com/message-board/download.php?id=34149
Here a a few more specimens from the article.
| Mineral: | Rhodochrosite, Sphalerite, Wurtzite |
| Locality: | | Merelani mines, Merelani Hills, Lelatema Mountains, Simanjiro District, Manyara Region, Tanzania | |
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| Dimensions: | 2.5 cm |
| Description: |
Merelani tanzanite mines, Manyara Region, Tanzania
Pseudomorph of rhodochrosite after octahedral alabandite, associated with sphalerite/wurtzite. The back of the specimen has small sharp octahedral claushalite crystals. |
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37856 Time(s) |
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| Mineral: | Clausthalite |
| Locality: | | Merelani mines, Merelani Hills, Lelatema Mountains, Simanjiro District, Manyara Region, Tanzania | |
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| Dimensions: | 0.7 mm max crystal size |
| Description: |
Merelani tanzanite mines, Manyara Region, Tanzania
Octahedral Clausthalite crystals in a sphalerite/wurtzite vug on the back of the above rhodochrosite/sphalerite/wurtzite specimen. |
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37831 Time(s) |
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_________________
Adjunct Curator, A. E. Seaman Mineral Museum
Professor of Physics
Michigan Technological University |
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John Jaszczak
Joined: 05 Oct 2010
Posts: 300
Location: Hancock, MI
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| Posted: Apr 07, 2016 14:15 Post subject: Re: A. E. Seaman Mineral Museum, Michigan Technological Univ., Houghton, Michigan |
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The size and quality of the alabandite crystals from Merelani were quite a surprise to find. In addition, they have a variety of associated species, including chalcopyrite, tennantite-tetrahedrite, stilbite, rhodochrosite, clausthalite, millerite, wurtzite, tanzanite, diopside, calcite, graphite, laumontite, tremolite, pyrite, chabazite-Ca, and more.
| Mineral: | Alabandite |
| Locality: | | Merelani mines, Merelani Hills, Lelatema Mountains, Simanjiro District, Manyara Region, Tanzania | |
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| Dimensions: | 3.5 cm |
| Description: |
| Merelani tanzanite mines, Manyara Region, Tanzania |
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| Viewed: |
37669 Time(s) |
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| Mineral: | Chalcopyrite on Alabandite |
| Locality: | | Merelani mines, Merelani Hills, Lelatema Mountains, Simanjiro District, Manyara Region, Tanzania | |
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| Dimensions: | 3.5 cm |
| Description: |
| The back side of the above specimen has a thin coating of Chalcopyrite, and also stepped surfaces with associated Tennantite-Tetrahedrite (see below) |
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| Viewed: |
37682 Time(s) |
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| Mineral: | Tennantite-Tetrahedrite |
| Locality: | | Merelani mines, Merelani Hills, Lelatema Mountains, Simanjiro District, Manyara Region, Tanzania | |
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| Description: |
| SEM image of Tennantite-Tetrahedrite crystals on Alabandite. |
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| Viewed: |
37655 Time(s) |
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_________________
Adjunct Curator, A. E. Seaman Mineral Museum
Professor of Physics
Michigan Technological University |
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NeedHelp
Joined: 30 Apr 2015
Posts: 8
Location: Michigan
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| Posted: Apr 10, 2016 21:59 Post subject: Re: A. E. Seaman Mineral Museum, Michigan Technological Univ., Houghton, Michigan |
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| John Jaszczak wrote: | | Dear Needhelp: Please call the museum and speak to the gift shop manager. The gift shop I think has a few books; the best one I know of is a geology and field guide by Ted Bornhorst and Bill Rose. - John |
Thanks, John. (I realize it's almost been a year since you posted that, but I forgot I had asked you for a book recommendation.)
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