English version
	INDUSTRIMINERALDATABASEN
	Registrering 1867 - 313 Kjerkhaugen
	(Objekt Id: 37242) (Sist oppdatert: 01.09.2022)

Mineralisering

	Genese:		Form:
	Hovedtekstur:		Min. fordeling:

Kornstørrelse:

	Strøk/Fall:		Retning:
			Feltstupning:

Stratigrafisk klassifikasjon av vertsbergart

Æra:

Periode:

	Provins:
	Geotek.enhet:
	Tektonisk complex:
	Intrusivt komplex:

Gruppe:

Formasjon:

Opplysning(er) i fritekstformat

Fri tekst

Forekomsten er en del av en geofysisk anomali som strakker seg fra Osetvannet of SØ over i ca. 500 meter lengde. Grafitt ble funnet på noen små blottninger på selve Kjerkhaugen. Rønning et al 2018 og 2019 viser detaljerte geofysiske kart og profiler.

Litteraturfortegnelser:

Fra NGU's Referansearkiv.:

Rønning, J.S.;Gautneb, H.; Larsen, B.E.; Baranwal, V.C.; Davidsen, B.; Engvik, A.K.; Gellein, J.; Knezevic, J.; Ofstad, F.; Xiuyan Ren; Viken, G. , 2019

	Geophysical and geological investigations of graphite occurrences in Vesterålen, Northern Norway, in 2018 and 2019

;Norges geologiske undersøkelse;RAPPORT;NGU-rapport; No.2019.031;212 sider

Abstrakt:

Several potential graphite occurrences in Vesterålen were selected for follow-up work based on helicopter-borne geophysical data. The purpose for this is to confirm the existence of the graphite and next to briefly evaluate the quality and quantity of the graphite-bearing structures. The goal for the project, which is sponsored by Nordland county administration, is to increase the knowledge of each individual graphite occurrence. By doing so, the interest in graphite prospecting in Northern Norway may increase, effective prospecting can be implemented, and land planning can be developed with appropriate regard for areas with potential for economic graphite.

Rønning, J.S.; Gautneb, H.; Larsen, B.E.; Knezevic, J.; Baranwal, V.C.; Elvebakk, H.; Gellein, J.; Ofstad, F.; Brönner, M. , 2018

	Geophysical and geological investigations of graphite occurrences in Vesterålen and Lofoten, Northern Norway 2017

;Norges geologiske undersøkelse;RAPPORT;NGU-rapport; No.2018.011;180 sider

Abstrakt:

As a part of the MINN project (Minerals in Northern Norway), a helicopter-borne geophysical survey was performed in Lofoten and Vesterålen in 2013. Electromagnetic data from this survey showed up anomalies that may be caused by large graphite mineralisation. With financial support from Nordland County, NGU has performed geophysical and geological follow-up work to 1) confirm the existence of graphite and 2) Briefly evaluate the quantity and quality of graphite structures. The project started in 2015 and the results from the first two years are reported by Gautneb et al. (2017) and Rønning et al. (2017). Follow-up work performed in 2017 is reported in this report. 15 locations have been investigated in total in 2017. The degree of detail in these studies varies from just a few lines of simple electromagnetic measurements (EM31) to electric measurements such as Self Potential (SP), Charged Potential (CP) and Electric Resistivity Traversing (ERT) in combination with Induced Polarisation (IP). In two areas, Sommarland and Haugsnes in Bø municipality, two short core drilling bore holes were made. The selection of follow-up objects was based on both magnetic and electromagnetic data from helicopter-borne measurements. All results from the 2017 work are reported here. Where possible, the volume of graphite is estimated based on the total strike length, the width of individual zones (from drilling, observations and width of EM31 measurements) and an assumed depth extent of 100 m. In these areas, an estimation of graphite tonnage is also given.

Gautneb, Håvard; Rønning, Jan Steinar; Engvik, Ane K.; Henderson, Iain H.C.; Larsen, Bjørn Eskil; Solberg, Janja Knezevic; Ofstad, Frode; Gellein, Jomar; Elvebakk; Harald; Davidsen, Børre , 2020

	The graphite occurrences of northern Norway, a review of geology, geophysics and resources

;ARTIKKEL;Minerals; No.7(10);24 s. sider

Abstrakt:

Artikkel i Minerals 2020 nr. 7 vol. 10. Abstract: There are three provinces in Northern Norway in which occurrences of graphite are abundant; the Island of Senja, the Vesterålen archipelago, and the Holandsfjorden area. From these provinces, we report graphite resources from 28 occurrences. We use a combination of airborne and ground geophysics to estimate the dimensions of the mineralized areas, and, combined with sampling and analysis of the graphite contents, this gives us inferred resources for almost all the occurrences. The average TC (total carbon) content is 11.6%, and the average size is 9.3 Mt or 0.8 Mt of contained graphite. We demonstrate that the Norwegian graphite occurrences have grades and tonnages of the same order of magnitude as reported elsewhere. The graphite-bearing rocks occur in a sequence that encompasses carbonates, meta-arenites, acid to intermediate pyroxene gneisses, and banded iron formations metamorphosed into the granulite facies. Available radiometric dating shows that the graphite-bearing rocks are predated by Archean gneisses and postdated by Proterozoic intrusions of granitic to intermediate compositions.

Navn på prøvepunkt: BD Bø 1813

(Objekt Id: 38759 313,00,01)

Lokalisering

Fylke:

Nordland

Kommune:

Bø (1867)

Kart 1:50000:

Stokmarknes (1132-2)

Kart 1:250000:

Svolvær

Koordinatsystem:

EU89-UTM Zone 33

Øst:

483963 m.

Nord:

7622248 m.

Lengdegrad:

14.6041970

Breddegrad:

68.7115250

Kartvisning

Ressurs

Ressurstype:

Grafitt

Ressursundertype:

Grafitt flak

Feltprøver

	Prøvenr.	Prøvetype	Diverse
	BD Bø 1813	Fastfjell	Prøvetaker: Børre Davidsen Kommentar: Weathered graphitic schist Antall registrerte spesialanalyser = 3

NB! Alle analyseverdier er vist i slutten av utskriften.:

Navn på prøvepunkt: BD Bø 1814

(Objekt Id: 38760 313,00,02)

Lokalisering

Fylke:

Nordland

Kommune:

Bø (1867)

Kart 1:50000:

Stokmarknes (1132-2)

Kart 1:250000:

Svolvær

Koordinatsystem:

EU89-UTM Zone 33

Øst:

484048 m.

Nord:

7622184 m.

Lengdegrad:

14.6063290

Breddegrad:

68.7109560

Kartvisning

Ressurs

Ressurstype:

Grafitt

Ressursundertype:

Grafitt flak

Feltprøver

	Prøvenr.	Prøvetype	Diverse
	BD Bø 1814	Fastfjell	Prøvetaker: Børre Davidsen Kommentar: Bluish sand. Stains the fingers Antall registrerte spesialanalyser = 3

NB! Alle analyseverdier er vist i slutten av utskriften.:

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Analyseresultater

fra

Forekomstområde 1867 - 313 Kjerkhaugen

Spesial analyser

Prøvenr.	Prøvetype	Hva som er målt	Resultat
BD Bø 1813	Fastfjell	Svovelinnhold	.07%
BD Bø 1813	Fastfjell	Karboninnhold	10%
BD Bø 1813	Fastfjell	Totalt organisk karbon	10%
BD Bø 1814	Fastfjell	Svovelinnhold	0%
BD Bø 1814	Fastfjell	Karboninnhold	2.92%
BD Bø 1814	Fastfjell	Totalt organisk karbon	2.85%

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Faktaarket ble generert 25.04.2024

Spørsmål eller kommentarer vedrørende faktaarket kan mailes til: ressursdatabaser@ngu.no

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