Associated amphibole & chrysotile asbestos
Does anyone know of locations where BOTH chrysotile and amphibole asbestiform minerals occur together? Any references?
I've found a couple locations listed in Mindat that have chrysotile and more or less acicular actinolite/tremolite, but not clearly asbestiform.
I had an inquiry from a retired lawyer in the area looking for a reference that shows both types of asbestos can occur together.
Thanks,
Jim Murowchck
University of Missouri-Kansas City
Thanks for clearing that up!
Natalie Deseta
Wits University
On 28 Feb 2014 6:49 PM, "Murowchick, James" MurowchickJ@umkc.edu wrote:
Does anyone know of locations where BOTH chrysotile and amphibole
asbestiform minerals occur together? Any references?
I've found a couple locations listed in Mindat that have chrysotile and
more or less acicular actinolite/tremolite, but not clearly asbestiform.
I had an inquiry from a retired lawyer in the area looking
for a reference that shows both types of asbestos can occur together.
Thanks,
Jim Murowchck
University of Missouri-Kansas City
MSA-talk mailing list
MSA-talk@minlists.org
http://lists.minlists.org/mailman/listinfo/msa-talk
Jim
At the risk of pissing off the lawyers, I would not give lawyers a single reference because then it opens the potential that all chrysotile asbestos could then be argued to possibly contain amphibole asbestos. As I recall, there are a few places with there are traces of amphibole in chrysotile deposits (Quebec?), but that is generally not the case.
The trade industry and lawyers have done a great disservice to the public be equating all “asbestos” to be health hazards whereas it is only clear that the amphibole asbestos is the hazard and chrysotile is no worse that any other dust one breaths (and certainly ordinary rock dust (plowed soils, etc) is much more dangerous if it contains any quartz).
my 2 cents.
John Dilles
Professor of Geology
College of Earth, Ocean, and Atmospheric Sciences
104 CEOAS Admin Bldg
Oregon State University
Corvallis OR 97331-5503
ph 541-737-1245; fax 541-737-1200
dillesj@geo.oregonstate.edu
On Feb 28, 2014, at 8:49 AM, Murowchick, James MurowchickJ@umkc.edu wrote:
Does anyone know of locations where BOTH chrysotile and amphibole asbestiform minerals occur together? Any references?
I’ve found a couple locations listed in Mindat that have chrysotile and more or less acicular actinolite/tremolite, but not clearly asbestiform.
I had an inquiry from a retired lawyer in the area looking for a reference that shows both types of asbestos can occur together.
Thanks,
Jim Murowchck
University of Missouri-Kansas City
MSA-talk mailing list
MSA-talk@minlists.org
http://lists.minlists.org/mailman/listinfo/msa-talk
02/28/14
John Dilles' comments are well put. Non-asbestiform tremolite amphibole can be
found in small amounts in some chrysotile deposits. That's all the lawyers need to
know. Since they believe all amphibole is asbestiform, then any deposit with any
amphibole is subject to litigation.
Mac
Malcolm Ross
1608 44th St. NW, Washington DC 20007, phone: 202-338-6572
E-mail: mrdrr@comcast.net
----- Original Message -----
From: John Dilles dillesj@science.oregonstate.eduTo: James Murowchick MurowchickJ@umkc.eduCc: msa-talk@minlists.orgSent: Fri, 28 Feb 2014 17:54:53 -0000 (UTC)Subject: Re: [MSA-talk] Associated amphibole & chrysotile asbestos
Jim
At the risk of pissing off the lawyers, I would not give lawyers a single reference because then it opens the potential that all chrysotile asbestos could then be argued to possibly contain amphibole asbestos. As I recall, there are a few places with there are traces of amphibole in chrysotile deposits (Quebec?), but that is generally not the case.
The trade industry and lawyers have done a great disservice to the public be equating all “asbestos” to be health hazards whereas it is only clear that the amphibole asbestos is the hazard and chrysotile is no worse that any other dust one breaths (and certainly ordinary rock dust (plowed soils, etc) is much more dangerous if it contains any quartz).
my 2 cents.
John Dilles
Professor of Geology
College of Earth, Ocean, and Atmospheric Sciences104 CEOAS Admin BldgOregon State UniversityCorvallis OR 97331-5503
ph 541-737-1245; fax 541-737-1200
dillesj@geo.oregonstate.edu
On Feb 28, 2014, at 8:49 AM, Murowchick, James MurowchickJ@umkc.edu wrote:
Does anyone know of locations where BOTH chrysotile and amphibole asbestiform minerals occur together? Any references?
I’ve found a couple locations listed in Mindat that have chrysotile and more or less acicular actinolite/tremolite, but not clearly asbestiform.
I had an inquiry from a retired lawyer in the area looking for a reference that shows both types of asbestos can occur together.
Thanks,
Jim Murowchck
University of Missouri-Kansas City
_______________________________________________MSA-talk mailing listMSA-talk@minlists.orghttp://lists.minlists.org/mailman/listinfo/msa-talk
Dear Malcolm
Thank-you for the comment. You are the expert, and my knowledge largely comes from reading what you have written in the past on this list server and in papers.
I spend about 20-30 minute of lecture time each year on the “asbestos” question when I teach mineralogy to our majors, with the hope that they can understand and pass on the knowledge to others. These sort of mineralogy & geochemistry issues are very important to an industrialized society, so one of our missions is to help the public understand so informed choices are made.
Thank-you.
JOHN
John Dilles
Professor of Geology
College of Earth, Ocean, and Atmospheric Sciences
104 CEOAS Admin Bldg
Oregon State University
Corvallis OR 97331-5503
ph 541-737-1245; fax 541-737-1200
dillesj@geo.oregonstate.edu
On Feb 28, 2014, at 1:39 PM, mrdrr@comcast.net wrote:
02/28/14
John Dilles' comments are well put. Non-asbestiform tremolite amphibole can be
found in small amounts in some chrysotile deposits. That's all the lawyers need to
know. Since they believe all amphibole is asbestiform, then any deposit with any
amphibole is subject to litigation.
Mac
Malcolm Ross
1608 44th St. NW, Washington DC
20007, phone: 202-338-6572
E-mail: mrdrr@comcast.net
----- Original Message -----
From: John Dilles dillesj@science.oregonstate.edu
To: James Murowchick MurowchickJ@umkc.edu
Cc: msa-talk@minlists.org
Sent: Fri, 28 Feb 2014 17:54:53 -0000 (UTC)
Subject: Re: [MSA-talk] Associated amphibole & chrysotile asbestos
Jim
At the risk of pissing off the lawyers, I would not give lawyers a single reference because then it opens the potential that all chrysotile asbestos could then be argued to possibly contain amphibole asbestos. As I recall, there are a few places with there are traces of amphibole in chrysotile deposits (Quebec?), but that is generally not the case.
The trade industry and lawyers have done a great disservice to the public be equating all “asbestos” to be health hazards whereas it is only clear that the amphibole asbestos is the hazard and chrysotile is no worse that any other dust one breaths (and certainly ordinary rock dust (plowed soils, etc) is much more dangerous if it contains any quartz).
my 2 cents.
John Dilles
Professor of Geology
College of Earth, Ocean, and Atmospheric Sciences
104 CEOAS Admin Bldg
Oregon State University
Corvallis OR 97331-5503
ph 541-737-1245; fax 541-737-1200
dillesj@geo.oregonstate.edu
On Feb 28, 2014, at 8:49 AM, Murowchick, James MurowchickJ@umkc.edu wrote:
Does anyone know of locations where BOTH chrysotile and amphibole asbestiform minerals occur together? Any references?
I’ve found a couple locations listed in Mindat that have chrysotile and more or less acicular actinolite/tremolite, but not clearly asbestiform.
I had an inquiry from a retired lawyer in the area looking for a reference that shows both types of asbestos can occur together.
Thanks,
Jim Murowchck
University of Missouri-Kansas City
MSA-talk mailing list
MSA-talk@minlists.org
http://lists.minlists.org/mailman/listinfo/msa-talk