Fact Sheet for Deposit Area 220

					Norsk versjon
	THE INDUSTRIAL MINERAL DATABASE
	Deposit Area 220 - 303
	(Last updated 20.feb.2006)

Name of Deposit Area : Bleiker

(Object Id : 0220,303,00,00)

Location

County :

Akershus (02)

Municipality :

Asker (0220)

Map 1:50000:

Asker (1814-1)

Map 1:250000:

Oslo

Marking point:

Longitude:

10.4666800

Latitude:

59.8318240

EU89-UTM Zone 32

(Coordinates NOT confirmed)

X-coord:

582218 m.

Y-coord:

6633591 m.

Commodity

Main Type:

Carbonates

Sub Type:

Limestone

Importance

Public: Little Importance (reg. 18.02.2015)

Economical: Minor interest , (Confirmed 20.feb.2006 by Havard Gautneb)

Products

Element/product Crude ore grade or quality

LIME %

Mineralization

Era: Paleozoic Period:

Dating: Method:

Genesis: Form:

Main texture: Min. distribution:

Main grain size:

Strike/Dip: Direction:

Plunge:

Stratigraphic classification of host rock

Era: Paleozoic Period: Silurian

Province: Oslo Region

Geotec.unit:

Tectonic complex:

Igneous complex:

Group: Formation:

Bibliography:

From NGU's Reference Archive:

Holtedahl, Olaf , 1912

Kalkstensforekomster i Kristianiafeltet

;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU; No.63;1-69 pages

Abstract:

Forkortet: The remarkable development in Norway of several chemico-technical branches of industry during the last twenty to thirty years has immensely increased the use of limestone. The object of the present paper is to contribute to our knowledge of the supply of native limestone. It is confined, however, to the occurrence of limestone in the "Oslo Field", indicated on the map, Fig.1, by darker tone. The occurrences in the Oslo Field are all of Ordovician or Silurian Age. As in the case of the palaeozoic sediments, here the lime- stone layers are never horizontal, but, from folding or other causes, are in- clined. The strike in the folded, northern districts is NE-SW to E-W. Descriptions of the several occurrences arranged according to districts menti- oned om pp.12,13 are to be found on pp. 13-63. As the most important occurrences of Ordovician limestone may be mentioned: The Enkrinit-limestone in the Langesund-Skien Valley district, the Gastropod-limestone in the Hadeland, the Mjøs-limestone in the "Mjøsdistrict" of Silurian: the Borealis-Pentamerus- limestone in the Hadeland, the Pentamerus-limestone in the Drammen Valley dis- trict, Bærum-Asker-Lier, Ringerike and the Mjøsdistrict, the Wenlock-limestone in the Langesund-Skien Valley district, the limestone of etage 9 d.

Era:	Paleozoic	Period:
Dating:		Method:
Genesis:		Form:
Main texture:		Min. distribution:

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