Fact Sheet for Deposit Area 623

					Norsk versjon
	THE NATURAL STONE DATABASE
	Deposit Area 623 - 603
	(Last updated 14.mar.2019)

Name of Deposit Area : Dypingdal

(Object Id : 0623,603,00,00)

Location

County :

Buskerud (06)

Municipality :

Modum (0623)

Map 1:50000:

Krøderen (1715-2)

Map 1:250000:

Hamar

Marking point:

Longitude:

9.8758860

Latitude:

60.0643620

EU89-UTM Zone 32

(Coordinates IS confirmed)

X-coord:

548759 m.

Y-coord:

6658902 m.

Commodity

	Main Type:	Soapstone and serpentinite	Sub Type:	Serpentinite
			Brickstone(Y/N):	N

Production

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

Importance

Public: Not Assessed (reg. 21.03.2017)

Economical: Could be significant , (Confirmed 23.apr.2003 by Tom Heldal)

Products

Commercial Name Product description

Serpentinite Classification : Colour :

Play of colours : Uniformity :

Lithology : Grain size :

Mineralogy:

Magnesite Major mineral (>10%)

Talc Major mineral (>10%)

Serpentine Major mineral (>10%)

Deposit rock

Lithology: Weathering colour:

Era: Proterozoic Period:

Dating: Method:

Genesis: Form:

Main texture:

Main grain size: Main alteration:

Strike/Dip: Direction:

Plunge:

Stratigraphic classification of host rock

Era: Proterozoic Period:

Province:

Geotec.unit:

Tectonic complex:

Igneous complex:

Group: Formation:

Information(s) in free text format

Description

Forekomsten er den samme som Dypingdal magnetittgruve. 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 drev famlien Steinsvik produksjon av prydgjenstander av edel serpentin. Serpentin-reservene er store sett i lys av den beskjedne produksjonen som foregår.

Bibliography:

From NGU's Reference Archive:

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

Serpentinite	Classification :	Colour :
	Play of colours :	Uniformity :
	Lithology :	Grain size :

		Magnesite	Major mineral (>10%)
		Talc	Major mineral (>10%)
		Serpentine	Major mineral (>10%)

Lithology:		Weathering colour:
Era:	Proterozoic	Period:
Dating:		Method:
Genesis:		Form:
Main texture:

	Province:
	Geotec.unit:
	Tectonic complex:
	Igneous complex: