Fact Sheet for Deposit Area 623

					Norsk versjon
	THE INDUSTRIAL MINERAL DATABASE
	Deposit Area 623 - 322
	(Last updated 24.jan.2013)

Name of Deposit Area : Dypingdal

(Object Id : 0623,322,00,00)

The deposit area belongs to the Province : Snarum magnesittprovins

Location

County :

Buskerud (06)

Municipality :

Modum (0623)

Map 1:50000:

Krøderen (1715-2)

Map 1:250000:

Hamar

Marking point:

Longitude:

9.8759100

Latitude:

60.0646130

EU89-UTM Zone 32

(Coordinates IS confirmed)

X-coord:

548759 m.

Y-coord:

6658930 m.

Commodity

Main Type:

Magnesium minerals

Sub Type:

Magnesite

Production

Activity:	Mining	Reserves:
Prod. method:	Open pit mining	Production:
Prod. status:	Disused, closed	Volume of dump:

Importance

Public: Little Importance (reg. 18.02.2015)

Economical: Minor interest , (Confirmed 24.jan.2013 by Havard Gautneb)

Mineralization

Era: Period:

Dating: Method:

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Main texture: Min. distribution:

Main grain size:

Strike/Dip: Direction:

Plunge:

Stratigraphic classification of host rock

Era: Period:

Province:

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Information(s) in free text format

Free text

Forekomsten er den samme som Dypingdal magnetittgruve og dypingdal serpentinitt gruve. Adkomst skjer langs en skogsbilvei som går fra Morud stasjon. Forekomsten er flere sonerte kropper med serpentinitt som har en magnesittrik randsone. Største utgående er ca. 12 km2. Forekomsten har produsert magnesitt som ildfast materiale, men er i dag best kjent som forekomst av edel serpentin. Edel serpentin er et dypgrønt mineral som kan inneholde spetter av hvit magnesitt, talk og enkelte ganger svarte magnetittkrystaller. Ved den nedlagte Morud stasjon ved Krøderbanen drevfamlien Steinsvik produksjon av prydgjenstander av edel serpentin. Serpentin-reservene er store sett i lys av den beskjedne produksjonen som foregår.

Photo(s) from the Deposit area:

Photo no. 1 showing Øvre Dypingdal Geologi"

Photo no. 2 showing Profiler Øvre Dypingdal"

Photo no. 3 showing Profiler Øvre Dypingdal"

Photo no. 4 showing Nedre Dypingdal Geologi"

Bibliography:

From NGU's Reference Archive:

Jøsang, Ottar , 1960

Serpentine-magnesite deposits at Modum.

;Norges geologiske undersøkelse;EKSKURSJONSGUIDE; TIDSSKRIFTARTIKKEL;NGU; No.212o;5-8 pages

Jøsang, Ottar , 1966

Geologiske og petrografiske undersøkelser i Modumfeltet.

;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU; No.235;1-148 + p pages

Abstract:

Geological mapping of part of the Modum area, the northernmost part of the Kongsberg-Bamble area in the Precambrian of southern Norway, was carried out. The different rocks are described, and metasomatic processes which have taken place in some of them, are described and discussed. The tectonic features, such as faults, breccias and more of less hypothetical folds are treated. Finally an attempt is made to set up a stratigraphy of the rocks, which most likely are of sedimentary origin. The rocks in the area are amphibolites and gabbros, banded gneisses, pegmatites, different types of micaschists - among which some are sillimanite-bearing-sillimanite granites, quartzites, rocks consisting of magnesite and serpentine (often with a number of rare minerals), scapolite rocks and different sorts of albite rocks. The gabbros always change gradually into amphibolites towards their borders; most of the amphibolites in the area were most probably originally gabbroic rocks. It is shown how sillimanite micaschists with plagioclase gradually change into sillimanite granites by K-metasomatism, whereby the potassium reacts with sillimanite and quartz to give muscovite, and with the plagioclase to give microcline.

Daumann, E. , 1905

Magnesit från Snarum

;TIDSSKRIFTARTIKKEL;Jernkontoret Annaler Bihang; No.6;222-225 pages

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