Fact Sheet for <b>Occurence 4215

					Norsk versjon
	THE INDUSTRIAL MINERAL DATABASE
	Occurence 4215 - 306 Glamsland
	(Object Id: 8378) (Last updated: 06.02.2015)

Location

County:

Agder

Municipality:

Lillesand (4215)

Map 1:50000:

Lillesand (1511-1)

Map 1:250000:

Arendal

Coordinate system:

EU89-UTM Zone 32

East:

459071 m.

North:

6457681 m.

Longitude:

8.3025480

Latitude:

58.2583130

Show on map

Resource

Resource Type:

Feldspar

Resource Subtype:

Pegmatitic feldspar

Importance

Raw material meaning:

Local Importance (reg. 07.02.2015)

Resources and production

	Activity:	Mining	Reserves:
	Operating method:	Open pit mining	Historical production:

Products

Element/product Crude ore grade or quality Reg. date

Pegmatitic feldspar % 15.10.2024

Operations

From - To Activity Comments

Regular production

Mineralization

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:

Mineralogy

Mineral Amount

Quartz Major mineral (10-50%)

Plagioclase Major mineral (10-50%)

Potassic feldspar Major mineral (10-50%)

Muscovite Subordinate mineral (1-10%)

Biotite Subordinate mineral (1-10%)

Chlorite Accessory mineral (<1%)

Garnet Accessory mineral (<1%)

Information(s) in free text format

Free text

Glamsland pegmatittbrudd ligger ca. 3 km vest for Lillesand. Pegmatitten består hovedsakelig av det som på Sørlandet kalles "tint" som er en grovkornig blanding mineraler av granittisk sammensetning. Ca.40% oligoklas, ca, 30% mikroklin, ca. 27% kvarts og 2 - 3% jernholdige mineraler. Like ved bruddene, ble det i 1968 bygd ferdig et flotasjonsverk som floterte ut kvarts, plagioklas (oligoklas), kalifeltspat (mikroklin) og biotitt. Forekomsten ble drevet de siste år av Sibelco Nordic, men driften ble nedlagt i 2011.

Bibliography:

From NGU's Reference Archive:

Kristoffersen, Marte , 1997

Evaluering av potensielle pegmatittforekomster i Glamslandfeltet.

;NTNU Bergavd.;AVHANDLING

Fieldsamples

Sample No. Sample type Miscellanrous

HK-11 Hand specimen

Sampler: Peter Ihlen/...Stored: Løkken

Comment: Gulrosa K-feltspat med noen innesl. av kvarts

No. of registrated oxide analyses = 1

HK-2 Hand specimen

Sampler: Peter Ihlen/...Stored: Løkken

Comment: K-feltspat

No. of registrated oxide analyses = 1

HK-3 Hand specimen

Sampler: Peter Ihlen/...Stored: Løkken

Comment: Plagioklas

No. of registrated oxide analyses = 1

HK-5 Hand specimen

Sampler: Peter Ihlen/...Stored: Løkken

Comment: Blekrosa K-feltspat

No. of registrated oxide analyses = 1

HK-7 Hand specimen

Sampler: Peter Ihlen/...Stored: Løkken

Comment: Blekrosa K-feltspat med kvartsinneslutninger

No. of registrated oxide analyses = 1

HK-9 Hand specimen

Sampler: Peter Ihlen/...Stored: Løkken

Comment: Gulrosa K-feltsp. m. parall. bånd av grafisk kv.

No. of registrated oxide analyses = 1

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

Analyse Results

from

Deposit Area 4215 - 306 Glamsland

Oxide analyses
( All values are in % )

Sample No. Sample Type SiO2 Al2O3 TiO2 Fe2O3 MgO CaO Na2O

HK-11 Hand specimen 69.90 16.30 0.00 0.03 0.01 0.08 1.68

HK-2 Hand specimen 70.50 19.00 0.00 0.09 0.04 2.21 8.27

HK-3 Hand specimen 65.00 18.00 0.00 0.04 0.00 0.09 1.90

HK-5 Hand specimen 66.60 17.10 0.00 0.01 0.02 0.08 2.17

HK-7 Hand specimen 65.40 18.30 0.00 0.04 0.01 0.10 2.31

HK-9 Hand specimen 65.50 18.40 0.00 0.05 0.01 0.24 2.67

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

Sample No. K2O Sum

HK-11 11.73 100.00

HK-2 0.68 101.00

HK-3 13.54 99.00

HK-5 12.39 98.00

HK-7 13.01 99.00

HK-9 12.22 99.00

	Element/product	Crude ore grade or quality	Reg. date
	Pegmatitic feldspar	%	15.10.2024

	Genesis:		Form:
	Main texture:		Min. distribution:

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

	Mineral	Amount
	Quartz	Major mineral (10-50%)
	Plagioclase	Major mineral (10-50%)
	Potassic feldspar	Major mineral (10-50%)
	Muscovite	Subordinate mineral (1-10%)
	Biotite	Subordinate mineral (1-10%)
	Chlorite	Accessory mineral (<1%)
	Garnet	Accessory mineral (<1%)

Sample No.	Sample Type	SiO2	Al2O3	TiO2	Fe2O3	MgO	CaO	Na2O
HK-11	Hand specimen	69.90	16.30	0.00	0.03	0.01	0.08	1.68
HK-2	Hand specimen	70.50	19.00	0.00	0.09	0.04	2.21	8.27
HK-3	Hand specimen	65.00	18.00	0.00	0.04	0.00	0.09	1.90
HK-5	Hand specimen	66.60	17.10	0.00	0.01	0.02	0.08	2.17
HK-7	Hand specimen	65.40	18.30	0.00	0.04	0.01	0.10	2.31
HK-9	Hand specimen	65.50	18.40	0.00	0.05	0.01	0.24	2.67

Sample No.	K2O	Sum
HK-11	11.73	100.00
HK-2	0.68	101.00
HK-3	13.54	99.00
HK-5	12.39	98.00
HK-7	13.01	99.00
HK-9	12.22	99.00