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	THE ORE DATABASE
	Occurence 3316 - 011 Tingelstadtjern
	(Object Id: 5885) (Last updated: 17.02.2005)

Mineralization

	Era:	Proterozoic	Period:	Mesoproterozoic
	Genesis:	Unknown	Form:	Irregular
	Main texture:	Structureless	Min. distribution:	Irregular (scattered)

Main grain size:

Very unevenly grained

Main alteration:

	Strike/Dip:		Direction:
			Plunge:

Stratigraphic classification of host rock

Era:

Proterozoic

Period:

Mesoproterozoic

	Province:	South Norwegian Basement Province
	Geotec.unit:	Kongsberg Complex
	Tectonic complex:
	Igneous complex:

Group:

Formation:

Mineralogy

	Relationship	Mineral	Amount
	Gangue mineral	Serpentine	Major mineral (>10%)
	Gangue mineral	Magnesite	Subordinate mineral (1-10%)
	Gangue mineral	Talc	Subordinate mineral (1-10%)
	Ore mineral	Hematite	Major mineral (>10%)
	Ore mineral	Magnetite	Subordinate mineral (1-10%)

Lithology:

	Relationship	Rock	Origin
	Host rock	Serpentinite
			Metamorphic facies :Amphibolite
	Wall rock	Quartz feldspar gneiss
			Metamorphic facies :Amphibolite

Structures

	Location:	Type:	Orientation(360 gr.):	Relation to min.:
	Wall rock	Foliation	Strike/Dip :310 / 68

Information(s) in free text format

Free text

Denne gruva befinner seg 200-250 m sør for Tingelstadtjern , ca 2 km sørvest for Vestre Spone. Det er tett skog i området. Gruva består av to ca. 100 m lange grøfter i N-S retning (~ 160o). Det er også en tverrgrøft med retning tilnærmet øst-vest (~ 80o) helt i sør. Grøftene er 2-4 m dype og 2-5 m brede. På grunn av den tette skogen og undervegetasjon som også dekker tipphaugene, er det vanskelig å bedømme størrelsen på driftene, men det er nok anslagsvis 4000 kbm materiale i tipphaugene. På tipphaugene ligger det en god del rustne malm-kibber og det er rester av en taubane som strekker seg ned til veien som går opp mot Skuterud koboltgruver. Mineralisering består av rik, men uregelmessig fordelt impregnasjon av hematitt med mindre mengder magnetitt, i form av uregelmessige og grovkornede aggregater i lys grønn serpentin og spredte korn av talk. Enkelte steder er det også en god del hvit magnesitt. Mineraliseringen er tilknyttet en serpentinitt som ligger langs en tektonisk sone i granittisk gneiss. Denne sonen består i enkelte partier langs grensen mot gneissen av nærmest ren talk. Serpentinen har dels fin grønn farge og er såkalt "edel-serpentin".

Bibliography:

From NGU's Reference Archive:

Jøsang, Ottar , 1960

	Serpentine-magnesite deposits at Modum.

;Norges geologiske undersøkelse;EKSKURSJONSGUIDE; TIDSSKRIFTARTIKKEL;NGU; No.212o;5-8 pages

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.

Fieldsamples

	Sample No.	Sample type	Miscellanrous
	BU0079.01	Dump	Sampler: T. Bjerkgård/I. Henderson/...Stored: Løkken/...Size(kg): 3 Comment: Rich impregnation of hematite with subordinate magnetite in coarse aggregates in light green serpentinite, scattered flakes of talc. No. of registrated element analyses = 1
	BU0079.02	Dump	Sampler: T. Bjerkgård/I. Henderson/...Stored: Løkken/...Size(kg): 3 Comment: Rich impregnation of hematite with subordinate magnetite in coarse aggregates in light green serpentinite, scattered flakes of talc and aggregates of magnesite. No. of registrated element analyses = 1
	BU0079.03	Dump	Sampler: T. Bjerkgård/I. Henderson/...Stored: Løkken/...Size(kg): 3 Comment: Scattered aggregates of magnetite in green serpentinite No. of registrated element analyses = 1

NB! All analyse values are shown at the end of the printout.:

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Analyse Results

from

Deposit Area 3316 - 011 Tingelstadtjern

Element analyses

( *=parts pr. million, #=parts pr.billion, Negative values means below detection limit value.)

Sample No.	Sample Type	Cu*	Zn*	Pb*	Co*	Ni*	Ag*	Au#
BU0079.01	Dump	13	5	2	1	20	.3	1.0
BU0079.02	Dump	3	3	2	1	12	.2	5.0
BU0079.03	Dump	5	6	2	4	55	.2	1.0

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Sample No.	Pt#	Pd#	As*	Cd*	Ba*	Mo*	Sb*	Bi*	S%
BU0079.01	1.0	1.0	63	.2	2	2.00	2	2	-.01
BU0079.02	1.0	1.0	57	.1	1	1.00	2	2	-.01
BU0079.03	1.0	1.0	58	.1	2	1.00	2	2	-.01

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Sample No.	V*	Cr*	Mn*	Fe%	Th*	U*	W*	Sr*	La*
BU0079.01	10	7	93	6.18	2.00	4.00	1	11.0	16.00
BU0079.02	5	15	76	4.09	2.00	4.00	1	8.0	17.00
BU0079.03	30	7	178	5.99	1.00	4.00	1	21.0	4.00

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Sample No.	B*
BU0079.01	177
BU0079.02	96
BU0079.03	124

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The fact sheet was created on 19.04.2024

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