vermiculite ore concern

Vermiculite Ore Concern

What is Vermiculite? - The Vermiculite Association

Vermiculite is mined using open cast mining techniques where the ore is separated from other minerals and then screened or classified into several basic particle sizes. Every care is taken in mining operations to minimize the impact on the environment and to restore land to its natural condition when mining ends.

Asbestos - Vermiculite - EH: Minnesota Department of Health

In its pure form, vermiculite is clean, odorless, nontoxic and sterile. Recent findings about vermiculite ore contaminated with tremolite asbestos have caused concern over possible health effects for workers and others who had long-term contact.

Vermiculite Toxicity | Garden Guides

From 1925 to 1990, vermiculite ore mined near Libby, Mont., accounted for more than half of the global production and supply. During the mining process, asbestos and asbestos fibers were mined and mixed with vermiculite. It is primarily the asbestos-contaminated vermiculite that has posed the greatest health concern.


few ore bodies have been found to contain more than tiny trace amounts. Nevertheless serious public concern was generated because of the known occurrences of asbestos in vermiculite deposits such as those in Montana that

Libby vermiculite exposure and risk of developing asbestos ...

Vermiculite from other sources is not known to be associated with any substantial adverse health effects [ 2, 3 ]; however, the vermiculite ore mined in Libby contained elongate mineral particles identified as a mixture of asbestiform amphiboles, including winchite, richterite, and tremolite asbestos [ 4 ].


The Vermiculite Institute is being organized to provide a voice to those who desire a more proactive resource. It is true the Libby, Montana vermiculite mine contained asbestos; and it is true that many miners and some plant workers who had regular exposure to the mine and to the crude vermiculite from that mine have developed health problems.

Vermiculite Home Page for Information about Vermiculite ...

Other helpful sites about vermiculite include: The Vermiculite Association--- The Vermiculite Association is an international association of vermiculite mining companies and expanders.Although not all mining companies and expanding companies belong to the Vermiculite Association (for instance, The Schundler Company is not a member), you can find the name of many manufacturers at this site and ...

Protect Your Family from Asbestos-Contaminated Vermiculite ...

Concerns about Asbestos-contaminated Vermiculite Insulation A mine near Libby, Montana, was the source of over 70 percent of all vermiculite sold in the United States from 1919 to 1990. There was also a deposit of asbestos at that mine, so the vermiculite from Libby was contaminated with asbestos.

Vermiculite - Wikipedia

Nevertheless, homes or structures containing vermiculite or vermiculite insulation dating from before the mid-1990s—and especially those known to contain the "Zonolite" brand—may contain asbestos, and therefore may be a health concern.


An estimated 105 exfoliation facilities in the US received vermiculite ore from the Libby mine. Because environmental contamination is more likely, exfoliation facilities (both former and current) that are thought to have received asbestos-contaminated ore from Libby, MT are of primary concern …

Vermiculite FAQs | Dudley Services, Inc.

When vermiculite (Zonolite ore) is disturbed it can release asbestos fibers into the air which increases the risk of lung cancer, mesothelioma, asbestosis and other asbestos related diseases. If the area containing the vermiculite is avoided and left undisturbed, then risk of …

Vermiculite | Avid Environmental

Of concern is vermiculite ore produced by the Libby Mine in Montana from 1924 into the late 1980s, the mine officially closed in 1990. During production it was packaged and sold as "Zonolite" Attic Insulation and many other brand names in the U.S. and Canada.

Vermiculite is a porous mineral used as insulation, and to ...

Oct 08, 2012 · Vermiculite is a mineral ore that is composed of hydrated laminar magnesium-aluminum-iron silicate (1). Vermiculite ores may also contain a range of other minerals including asbestos (1). All vermiculite does not necessarily contain asbestos, however, much of the vermiculite from Libby

final strategy for further assessment of vermiculite ...

Vermiculite Ore. Vermiculite is a mineral ore that can include asbestos as a harmful wastet was first found in the year 1824 in the english county of worchester, massachusetts but was not commercially mined until the year 1923fter the processes of mining and milling, the ore is then later heated to exfoliate and to be formed into a substance that is fire.

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