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About ImpsoniteHide

Vitreous, Sub-Metallic, Dull
A variety of Pyrobitumen

Impsonite is a black, carbonaceous substance, with a specific gravity of 1.10–1.25 and a carbon content of 50–85%. It is described as an asphaltic pyrobitumen, derived from a fluid bitumen which polymerized after filling a vein. The term was coined by George Homans Eldridge in 1901, referring to the asphaltic material in the Impson Valley in southeastern Oklahoma, later known as the Jumbo mine. The asphaltic material in the Impson Valley was later reclassified as grahamite, based on solubility and chemical similarities with the type grahamite of West Virginia.

Physical Properties of ImpsoniteHide

Vitreous, Sub-Metallic, Dull

Geological EnvironmentHide

Geological Setting:
Veins in sedimentary rocks

Other Language Names for ImpsoniteHide


Varieties of ImpsoniteHide

ArkositeAn organic compound, said to be a variety of Impsonite

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for ImpsoniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Eldridge, G. H. (1901) The asphalt and bituminous rock deposits of the United States: Part 1-Director's report and a paper on asphalt and bituminous rock deposits. Twenty-second annual report of the United States Geological Survey to the Secretary of the Interior, 1900-01: no. 22; pt. 1-01-14, pp. 209-364. United States Geological Survey
Richardson, C., (1910) Grahamite, a Solid Native Bitumen. J. Am. Chem. Soc., 1910, 32 (9), pp 1032–1049
Cardott, B. J. (1988) Organic petrology of epi-impsonite at Page, Oklahoma, USA. 5th annual meeting The Society for Organic Petrology

Internet Links for ImpsoniteHide

Localities for ImpsoniteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
  • Tyrol
    • Kufstein District
      • Brixlegg
        • Geyer - Silberberg District
          • Silberberg
            • West slope ("Am Geyer")
Der Aufschluß (2006)
  • Lapland
    • Rovaniemi
[var: Arkosite] Guice, G. L., Törmänen, T., Johanson, B., & Lahaye, Y. (2017). Offset-type PGE mineralisation in the Sotkavaara Intrusion, northern Finland: an association with zones of low-cr clinopyroxenite. Applied Earth Science, 126(2), 61-62.
  • Lower Saxony
    • Göttingen District
      • Osterode am Harz
        • Lerbach
Andreas Gerstenberg
  • Schleswig-Holstein
    • Pinneberg
      • Klein Nordende
Urbigkeit, k. (1987): Die Mineralien der Kalkgrube Lieth bei Elmshorn. LAPIS 12 (2), 25-29
  • Arkansas
William E. Ham (1956) Asphaltite in the Ouachita Mountains : Oklahoma Geological Survey Mineral Report 30
  • Oklahoma
    • Le Flore Co.
Ham, W.E. (1956) Asphaltite in the Ouachita Mountains. Mineral Report 30, Oklahoma Geological Survey, Norman Oklahoma, 12 pages.; Cardott, B. J. (1988). Organic petrology of epi-impsonite at Page, Oklahoma, USA. 5th annual meeting The Society for Organic Petrology
Mineral and/or Locality  
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