Fact Sheet for Deposit Area 806

					Norsk versjon
	THE INDUSTRIAL MINERAL DATABASE
	Deposit Area 806 - 310
	(Last updated 05.des.2024)

Name of Deposit Area : Meisholt

(Object Id : 0806,310,00,00)

Location

County :

Telemark (08)

Municipality :

Skien (0806)

Map 1:50000:

Nordagutu (1713-4)

Map 1:250000:

Skien

Marking point:

Longitude:

9.5588690

Latitude:

59.3260750

EU89-UTM Zone 32

(Coordinates IS confirmed)

X-coord:

531803 m.

Y-coord:

6576494 m.

Commodity

Main Type:

Other industrial minerals

Sub Type:

Apatite

Importance

Public: (No data)

Economical: Not classified/evaluated

Mineralization

Era: Period:

Dating: Method:

Genesis: Form:

Main texture: Min. distribution:

Main grain size:

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

Free text

There are two main excavation pits, both of small size around 3m x 3m x 1m. In the northernmost excavation pit the predominant host rock is a coarse-grained monzonite, however, syenitic portions are also observed. The rock contains 2cm feldspar crystals with interstitial mafic minerals occurring as fine-grained aggregates (around 15-30%), which is crossed (sharp contact) by the mineralisation comprising a fine- to medium grained rock containing feldspar, clinopyroxene, magnetite, ilmenite and apatite. The magnetic susceptibility increases from 50x10-6 SI in the coarse-grained monzonite to 100-150 50x10-6 SI in the transitional portion, to up to 300 in the massive portions. In the southern excavation pit the host rock is dark-coloured and mainly fine-grained with some feldspar laths of up to 1cm within the fine matrix. Within this fine-grained rock there are some 30-40cm pockets of massive magnetite and apatite mineralisation, with magnetic susceptibility up to 700x10-6 SI. The massive ore consists of 50% of subhedral augite 30%, surrounded by 30% of Fe-Ti oxides (titanomagnetite and ilmenite) and 15% of apatite. The contact between mineralization and the host syenite is sharp and over a 3 cm thin area, the mineralization dominated by augite (80%), while Fe-Ti oxide account for only 5% of the rock and apatite 10%. Whole-rock analysis, on a single sample indicate concentrations of 3.6 wt% P2O5, 10 wt% TiO2 and 55 wt% Fe2O3tot in the massive mineralization.

Bibliography:

References not to be found in NGU's Reference Archive.:

Wang, Y., Coint, N., Mansur, E. T., Acosta-Gongora, P., Miranda, A. C. R., Nasuti, A. & Baranwal, V. C. (2024). Leveraging Domain Expertise in Machine Learning for Critical Metal Prospecting in the Oslo Rift: A Case Study for Fe-Ti-P-Rare Earth Element Mineralization. Minerals 14, 377.

Fieldsamples

Sample No. Sample type Miscellanrous

SILJ121207 Bedrock

Sampler :Peter Ihlen/Nolwenn Coint

Comment :This occurence is also registere in the ore database.magnetite rich ore

No. of registrated element analyses = 1

No. of registrated oxide analyses = 1

SILJ121208 Bedrock

Sampler :Peter Ihlen/Nolwenn Coint

Comment :This occurence is also registere in the ore database.pyroxene rich rock in contact with magn ore

No. of registrated element analyses = 1

No. of registrated oxide analyses = 1

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

Analyse Results

from

Deposit Area 806 - 310 Meisholt

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

Sample No. Sample Type Cu* Zn* Co* Ni* Ba* Mo* Sn*

SILJ121207 Bedrock 57 415 63 48 39 54.00 101

SILJ121208 Bedrock 49 215 31 64 240 7.20 12

------------------

Sample No. Ga* V* Cr* Th* U* W* Rb* Sr* Y*

SILJ121207 66.30 653 72 14.30 5.30 1 -5.0 57.0 238.0

SILJ121208 23.40 192 167 14.20 2.80 1 45.4 282.0 200.0

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Sample No. Zr* Nb* Ta* Cs* La* Ce* Pr* Nd* Sm*

SILJ121207 1430.00 70.10 0.20 293.00 641.00 81.70 301.00 54.40

SILJ121208 3400 146.50 6.60 0.90 264.00 610.00 77.70 298.00 56.90

------------------

Sample No. Eu* Gd* Tb* Dy* Ho* Er* Tm* Yb* Lu*

SILJ121207 6.50 44.00 6.80 41.90 9.30 29.30 4.90 37.30 6.40

SILJ121208 8.00 45.80 7.00 40.40 8.00 22.40 3.30 22.10 3.30

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Sample No. F* Sc* Hf*

SILJ121207 -0 55.00 865.00

SILJ121208 0 54.70 76.00

Oxide analyses
( All values are in % )

Sample No. Sample Type SiO2 Al2O3 TiO2 Fe2O3 MnO MgO CaO

SILJ121207 Bedrock 17.30 1.22 15.70 44.20 0.74 5.55 7.23

SILJ121208 Bedrock 47.40 6.07 1.99 12.70 0.51 9.66 14.60

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Sample No. Na2O K2O P2O5 Loss Sum

SILJ121207 0.75 0.17 1.61 -0.85 94.00

SILJ121208 2.14 1.63 1.48 0.17 98.00

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

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

Sample No.	Sample Type	Cu*	Zn*	Co*	Ni*	Ba*	Mo*	Sn*
SILJ121207	Bedrock	57	415	63	48	39	54.00	101
SILJ121208	Bedrock	49	215	31	64	240	7.20	12

Sample No.	Ga*	V*	Cr*	Th*	U*	W*	Rb*	Sr*	Y*
SILJ121207	66.30	653	72	14.30	5.30	1	-5.0	57.0	238.0
SILJ121208	23.40	192	167	14.20	2.80	1	45.4	282.0	200.0

Sample No.	Zr*	Nb*	Ta*	Cs*	La*	Ce*	Pr*	Nd*	Sm*
SILJ121207		1430.00	70.10	0.20	293.00	641.00	81.70	301.00	54.40
SILJ121208	3400	146.50	6.60	0.90	264.00	610.00	77.70	298.00	56.90

Sample No.	Eu*	Gd*	Tb*	Dy*	Ho*	Er*	Tm*	Yb*	Lu*
SILJ121207	6.50	44.00	6.80	41.90	9.30	29.30	4.90	37.30	6.40
SILJ121208	8.00	45.80	7.00	40.40	8.00	22.40	3.30	22.10	3.30

Sample No.	F*	Sc*	Hf*
SILJ121207	-0	55.00	865.00
SILJ121208	0	54.70	76.00

Sample No.	Sample Type	SiO2	Al2O3	TiO2	Fe2O3	MnO	MgO	CaO
SILJ121207	Bedrock	17.30	1.22	15.70	44.20	0.74	5.55	7.23
SILJ121208	Bedrock	47.40	6.07	1.99	12.70	0.51	9.66	14.60

Sample No.	Na2O	K2O	P2O5	Loss	Sum
SILJ121207	0.75	0.17	1.61	-0.85	94.00
SILJ121208	2.14	1.63	1.48	0.17	98.00