Fen Complex, Norway

Fen Complex, Norway

The Fen complex in Nome, Telemark, Norway is a region noted for an unusual suite of igneous rocks. Several varieties of carbonatite are present in the area as well as lamprophyre, ijolite and other highly alkalic rocks. It is the type locality for fenite, a metasomatic rock commonly found around carbonatite and alkali intrusives.

The Fen complex is a roughly circular area about three kilometres in diameter. It is located just west of the Oslo graben. Radiometric age dating on the carbonatites gave an age of 539 +/- 14 Myr. The host rocks for the intrusions are middle Proterozoic granites and gneiss and the complex was associated with the Cambrian rifting of the cratonic rocks.

The complex is a protected location because of the rare minerals and rock types found there. The rocks were first described by W. C. Brøgger in 1921.

References

* Faure, Gunter (2000) "Origin of Igneous Rocks", Springer, ISBN 3-540-67772-0
* [http://www.mindat.org/loc-14357.html Mindat location description]


Wikimedia Foundation. 2010.

Игры ⚽ Поможем решить контрольную работу

Look at other dictionaries:

  • Fen (disambiguation) — The term fen or the acronym FEN can refer to:* Fen, a type of wetland, similar to a marsh or bog. * Fen (name), a Chinese given name *Fen Barefoot, a character in the Battle Arena Toshinden video game series * An invented alternative plural of… …   Wikipedia

  • Carbonatite — Carbonatites (pronEng|kɑrˈbɒnətaɪt) are intrusive or extrusive igneous rocks defined by mineralogy that comprises more than 50 volume % carbonate minerals. Carbonatites may be confused with marble, and may require geochemical… …   Wikipedia

  • Business and Industry Review — ▪ 1999 Introduction Overview        Annual Average Rates of Growth of Manufacturing Output, 1980 97, Table Pattern of Output, 1994 97, Table Index Numbers of Production, Employment, and Productivity in Manufacturing Industries, Table (For Annual… …   Universalium

  • Europe — /yoor euhp, yerr / for 1; /yoo roh pee, yeuh / for 2, n. 1. a continent in the W part of the landmass lying between the Atlantic and Pacific oceans, separated from Asia by the Ural Mountains on the E and the Caucasus Mountains and the Black and… …   Universalium

  • river — river1 riverless, adj. riverlike, adj. /riv euhr/, n. 1. a natural stream of water of fairly large size flowing in a definite course or channel or series of diverging and converging channels. 2. a similar stream of something other than water: a… …   Universalium

  • Health and Disease — ▪ 2009 Introduction Food and Drug Safety.       In 2008 the contamination of infant formula and related dairy products with melamine in China led to widespread health problems in children, including urinary problems and possible renal tube… …   Universalium

  • High Speed 1 — approaching the Medway Viaducts …   Wikipedia

  • pottery — /pot euh ree/, n., pl. potteries. 1. ceramic ware, esp. earthenware and stoneware. 2. the art or business of a potter; ceramics. 3. a place where earthen pots or vessels are made. [1475 85; POTTER1 + Y3] * * * I One of the oldest and most… …   Universalium

  • Contents of the United States diplomatic cables leak (Europe) — Content from the United States diplomatic cables leak has depicted Europe and related subjects extensively. The leak, which began on 28 November 2010, occurred when the website of WikiLeaks an international new media non profit organisation that… …   Wikipedia

  • Cinema of the United Kingdom — List of British films 1888 1919 1920s 1930s 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”