By Robert L Virta Usgs Minerals

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  • By Robert L Virta Usgs Minerals

Mineral Industry Surveys

Mineral Industry Surveys. For information, contact: Robert L. Virta, Iron Ore Commodity Specialist (acting) U.S. Geological Survey . 989 National Center . Reston, VA 20192 . Telephone: (703) …

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Mineral Resource of the Month: Talc

When people think of talc, they often think of talcum and baby powder. However, these uses of talc are minor compared to its use in industrial manufacturing. The leading use of talc in the United States is in the production of ceramics, where it is a source of magnesium oxide, serves as a flux to reduce firing temperatures, and improves thermal shock characteristics of the final …

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By Robert L. Virta

(Industrial Minerals, 1999). In ceramics, wollastonite decreases shrinkage and gas evolution during firing, increases green and fired strength, maintains its brightness during firing, …

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Minerals Yearbook: Metals and Minerals

The Minerals Yearbook is an authoritative, annual publication publshed by the U.S. Geological Survey (USGS) that reviews the mineral and material industries of the United States and foreign countries. The Yearbook contains statistical data on materials and minerals and includes information on economic and technical trends and development. The Minerals …

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Earth mineral resource of the month: asbestos

The article discusses the characteristics and feature of asbestos. According to the author, asbestos is a generic name for six needle-shaped minerals that possess high tensile strengths, flexibility, and resistance to chemical and thermal degradation. These minerals are actinolite, amosite, anthophyllite, chrysolite, crocilodite and tremolite.

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National Minerals Information Center

Each chapter of the 2014 edition of the U.S. Geological Survey (USGS) Mineral Commodity Summaries (MCS) includes information on events, trends, and issues for each mineral commodity as well as discussions and tabular presentations on domestic industry structure, Government programs, tariffs, 5-year salient statistics, and world production and ...

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Mineral resource of the month: clays

Clays represent one of the largest mineral commodities in the world in terms of mineral and rock production and use. Many people, however, do not recognize that clays are used in an amazingly wide variety of applications. Use continues to increase worldwide as populations and their associated needs increase. Robert Virta, clay and shale commodity specialist for the U.S. …

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Worldwide asbestos supply and consumption trends from …

The use of asbestos is one of the most controversial issues surrounding the industrial minerals industry. Its carcinogenic nature, an overall lack of knowledge of minimum safe exposure levels, its widespread use for more than 100 years, and the long latency for the development of lung cancer and mesothelioma are the main contributing factors to these …

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Minerals Yearbook

Talc and pyrophyllite by Robert L Virta 75 1 . 75-1 ... Ferromanganese fluorspar furnace Gemstones gold grade gross weight gypsum IMPORTS FOR CONSUMPTION Includes increased Industrial Minerals International Japan kilograms lead lime ... three significant digits totals shown U.S. Census Bureau U.S. Department U.S. Geological Survey U.S. IMPORTS ...

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Kaolin

The article reports on the market performance of kaolin in the U.S. in 2009 and presents an outlook for its 2010 performance. There was a decline in the domestic sales of kaolin from 6.74 measurement ton (Mt) to 5.2 Mt. Companies in the country engaged in kaolin production include Advanced Primary Minerals Corp., Applied Minerals Inc., and Daleco Resources Corp.

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Asbestos: Geology, Mineralogy, Mining, and Uses

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    Mineral Commodity Profiles, Asbestos: Usgs Circular 1255 …

    Mineral Commodity Profiles, Asbestos: Usgs Circular 1255-Kk [Virta, Robert L., U. S. Department of the Interior, United] on Amazon. *FREE* shipping on qualifying offers. …

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    • Worldwide Asbestos Supply and Consumption Trends …

    By Robert L. Virta Circular 1298 U.S. Department of the Interior ... issues surrounding the industrial minerals industry. Its carci-nogenic nature, an overall lack of knowledge of minimum safe exposure levels, its widespread use for more than 100 years, ... Survey (USGS) Open-File Report 03–083, "Worldwide Asbes-

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    USGS Circular 1298

    View or download the PDF (2 ).. Abstract. This Circular updates and supersedes U.S. Geological Survey (USGS) Open-File Report 03–083, "Worldwide Asbestos Supply and Consumption Trends from 1900 to 2000," with the addition of supply and consumption estimates and analysis from 2001 through 2003 and revisions to the consumption estimates for 1998 …

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    Asbestos: Geology, Mineralogy, Mining, and Uses

    These fibers belong to two mineral groups: serpentines and amphiboles. The serpentine group contains a single asbestiform variety: chrysotile; five asbestiform varieties of amphiboles are known: anthophyllite asbestos, grunerite asbestos (amo ... Robert L. Virta: Publication Type: Report: Publication Subtype: USGS Numbered Series: Series Title ...

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    Ball clay

    The article reports on the global market performance of ball clay in 2009 and presents an outlook for its 2010 performance. Several companies mined ball call in the country including Old Hickey Clay Co., Kentucky-Tennessee Clay Co., and H.C. Spinks Clay Co. Information on the decline in ball clay imports and exports is also presented....

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    Mineral Resource of the Month: Talc | U.S. Geological Survey

    When people think of talc, they often think of talcum and baby powder. However, these uses of talc are minor compared to its use in industrial manufacturing. The leading use of talc in the United States is in the production of ceramics, where it is a source of magnesium oxide, serves as a flux to reduce firing temperatures, and improves thermal shock characteristics of …

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    Superseded publication

    The use of asbestos is one of the most controversial issues surrounding the industrial minerals industry. Its carcinogenic nature, an overall lack of knowledge of minimum safe exposure levels, its widespread use for more than 100 years, and the long latency for the development of lung cancer and mesothelioma are the main contributing factors to these controversies.

    WhatsApp: +86 18221755073

    Mineral Resource of the Month: Talc | U.S. Geological Survey

    When people think of talc, they often think of talcum and baby powder. However, these uses of talc are minor compared to its use in industrial manufacturing. The leading use of talc in the United States is in the production of ceramics, where it is a source of magnesium oxide, serves as a flux to reduce firing temperatures, and improves thermal shock characteristics of the final …

    WhatsApp: +86 18221755073

    2011 Minerals Yearbook

    2011 Minerals Yearbook U.S. Department of the Interior U.S. Geological Survey IRON ORE December 2013. IRON ORE—2011. ... (USGS) develops U.S. iron ... By Candice C. Tuck and Robert L. Virta . Domestic survey data and tables were prepared by Michelle B. Blackwell, statistical assistant, and the world production ...

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    Kaolin | U.S. Geological Survey

    The article reports on the market performance of kaolin in the U.S. in 2009 and presents an outlook for its 2010 performance. There was a decline in the domestic sales of kaolin from 6.74 measurement ton (Mt) to 5.2 Mt. Companies in the country engaged in kaolin production include Advanced Primary Minerals Corp., Applied Minerals Inc., and Daleco …

    WhatsApp: +86 18221755073

    Minerals Yearbook: Metals and Minerals

    This volume, covering metals and minerals, contains chapters on approximately 90 commodities. In addition, this volume has chapters on mining and quarrying trends and on statistical surveying methods used by Minerals Information, plus a statistical summary.

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    Mineral resource of the month: natural and synthetic zeolites

    Volcanic rocks containing natural zeolites — hydrated aluminosilicate minerals that contain alkaline and alkaline-earth metals — have been mined worldwide for more than 1,000 years for use as cements and building stone. For centuries, people thought natural zeolites occurred only in small amounts inside cavities of volcanic rock. But in the 1950s and early 1960s, large zeolite …

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