Fact Sheet for Deposit Area 301

					Norsk versjon
	THE NATURAL STONE DATABASE
	Deposit Area 301 - 606
	(Last updated 16.feb.2010)

Name of Deposit Area : Grinda

(Object Id : 0301,606,00,00)

Location

County :

Oslo (03)

Municipality :

Oslo (0301)

Map 1:50000:

Oslo (1914-4)

Map 1:250000:

Oslo

Marking point:

Longitude:

10.7526490

Latitude:

59.9698570

EU89-UTM Zone 32

(Coordinates IS confirmed)

X-coord:

597840 m.

Y-coord:

6649349 m.

Commodity

	Main Type:	Granite and other igneous rocks	Sub Type:	Syenite
			Brickstone(Y/N):	N

Production

Activity:	Stone quarrying	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.sep.2004 by Leif Furuhaug)

Historical: Yes , (Confirmed 24.sep.2004 by Leif Furuhaug)

Deposit rock

Lithology: Weathering colour:

Era: Period:

Dating: Method:

Genesis: Form:

Main texture:

Main grain size: Main alteration:

Strike/Dip: Direction:

Plunge:

Stratigraphic classification of host rock

Era: Period:

Province:

Geotec.unit:

Tectonic complex:

Igneous complex:

Group: Formation:

Information(s) in free text format

Description

Bruddet er ganske lite, 10 m x 10 m med 1-2 m avsenkning. Syenitten er ganske skarp rød og har feltspatkrystaller på ca. 1 cm. Store inneslutninger av hornfels og RP i dette området.

Location

Grinda ligger mellom Sognsvann og Maridalsvann, i sørenden av Oslomarka.

Photo(s) from the Deposit area:

Photo no. 1 showing Bruddet"

Bibliography:

From NGU's Reference Archive:

Oxaal, John , 1916

Norsk granit

;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU; No.76;1-220 pages

Abstract:

This work is a report of granite and the granite industry in Norway. It contains a description of the various fields of granite and similar rocks from a scientific as well as from a technical and economical standpoint. The geological occurrence of the various rocks, their chemical and mineralogical composition, are thoruoughlyoughly treated, also the questions of practical interest, as the quality and other technical properties, further the problems of location and conditions for transport, conditions for quarrying and otherquestions of interest in the utilization of the various occurrences of granite. Granite: This chapter consideres first the mineralogical and chemical composition of the granite, and the various types of granite resulting from the varying composition; thereafter the most important structural types and how these are dependent on the geological appearance of the rock. Lakkolites and other froms assumed by granite masses when injected into the crust of the earth, are mentioned; some examples of beautifully formed lakkolites are also mentioned. The question of sheet structure and rift in the granite are of great importance in its utilization, and are of interest both practically and theoretically.

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

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