Fact Sheet for Deposit Area 1870

					Norsk versjon
	THE INDUSTRIAL MINERAL DATABASE
	Deposit Area 1870 - 318
	(Last updated 27.feb.2015)

Name of Industrial Mineral Province : Jennestad grafittfelter

(Object Id : 1870,318,00,00)

Location

County :

Nordland (18)

Municipality :

Sortland (1870)

Map 1:50000:

Myre (1232-4)

Map 1:250000:

Svolvær

Marking point:

Longitude:

15.2433990

Latitude:

68.7543400

EU89-UTM Zone 33

X-coord:

509843 m.

Y-coord:

7626989 m.

Commodity

Main Type:

Graphite

Sub Type:

Graphite

Information(s) in free text format

Free text

The Jennestad province comprice all the old the and abandoned mines and showings in the jennestad area. The extend is described by Gautneb & Tveten. (2000). New and detailed airborne geophysics cover this area.

Bibliography:

From NGU's Reference Archive:

Gautneb, Håvard ; Tveten, Einar , 2000

The geology, exploration and characterisation of graphite deposits in the Jennestad area, Vesterålen, northern Norway

;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU Bulletin; No.436;67-74 pages

Abstract:

This paper reviews graphite exploration in the Jennestad area, Nordland. As a result of helicopter aeromagnetic surveying and subsequent ground geophysics mapping and trenching, some 30, variously sized bodies of graphite schist identified.The graphite-bearing schist occurs associated with dolomite marbles amphibolites and pyroxene gneisses, all of which are intruded by charnockites and granites. The graphite is coarse, fully ordered, crystalline and flaky. Graded up to 40% carbon were found. Gangue minerals in the ore are quartz, plagioclase, K-feldspar, biotite and orthopyroxene. Some of the largest ore bodies contain about 250,000 tonnes each with an average grade of 20% carbon. Bench-scale benefication tests shown that the ore can be upgraded to a maximum grade of 97% C, with a recovery of 89%. It is believed that the graphite schists were originally sediments rich in organic matter which was converted to graphite during granulite-facies metamorphism.

Rodionov, Alexei; Ofstad, Frode; Stampolidis, Alexandros; Tassis, Georgios , 2013

Helicopter-borne magnetic, electromagnetic and radiometric geophysical survey at Langøya in Vesterålen, Nordland

;Norges geologiske undersøkelse;RAPPORT;NGU-rapport; No.2013.044;26 pages

Abstract:

NGU conducted an ariborne geophysical survey in Langøya area in July - August 2013 as part of the MINN-project. This report describes and documents the acquisition, processing and visualization of recorded datasets. The geophysical survey results reported herein are 5650 line km, covering an area of 1050 km2

	Abstract:
	NGU conducted an ariborne geophysical survey in Langøya area in July - August 2013 as part of the MINN-project. This report describes and documents the acquisition, processing and visualization of recorded datasets. The geophysical survey results reported herein are 5650 line km, covering an area of 1050 km2