(Last updated: 21.03.2024)
|
|
Norsk versjon | ||||
| THE ORE DATABASE | |||||
| Occurence 4613 - 006 Haugesundgangen | |||||
| (Object Id: 4734) (Last updated: 21.03.2024) |
|||||
|
|
| Location |
| County: | Vestland | Municipality: | Bømlo (4613) |
| Map 1:50000: | Bømlo (1114-2) | Map 1:250000: | Haugesund |
| Coordinate system: | EU89-UTM Zone 32 |
| East: | 284494 m. | North: | 6625260 m. |
| Longitude: | 5.1685090 | Latitude: | 59.7092760 |
| Show on map |
|
|
| Resource |
| Resource Type: | Precious metals (Au,Ag,PGE) | Resource Subtype: | Gold | |
| Element(s): | Au Cu |
| Importance |
| Raw material meaning: | Little Importance (reg. 26.05.2015) |
| Resources and production |
| Activity: | Mining | Reserves: | ||
| Operating method: | Open pit and underground mining | Historical production: | 6 thousand tons |
Products |
| Element/product | Crude ore grade or quality | Reg. date | |
| Au | 1.14 ppm | 21.03.2024 |
Operations |
| From - To | Activity | Comments | |
| 1890 - 1891 | Regular production | ||
| 1930 - 1980 | Sampling | ||
| 1984 - 1984 | Core drilling | Company/Institution :NGU | |
| 1991 - 1991 | Sampling |
Mineralization |
| Genesis: | Hydrothermal vein | Form: | Plate | |
| Main texture: | Vein network | Min. distribution: | Disseminated (<20 % ore minerals) |
| Main grain size: | Fine grained (< 1 mm) | Main alteration: | Chloritisation |
| Strike/Dip: | 18 / 76 | Direction: | ||
| Plunge: |
| Stratigraphic classification of host rock |
| Era: | Period: |
| Province: | Caledonides | |
| Geotec.unit: | Hardangerfjord Nappe Complex | |
| Tectonic complex: | ||
| Igneous complex: | Lykling Ophiolite Complex |
| Group: | Formation: |
Mineralogy |
| Relationship | Mineral | Amount | |
| Gangue mineral | Chlorite | Major mineral (>10%) | |
| Gangue mineral | Carbonate | Subordinate mineral (1-10%) | |
| Gangue mineral | Quartz | Subordinate mineral (1-10%) | |
| Ore mineral | Pyrite | Subordinate mineral (1-10%) | |
| Ore mineral | Gold | Accessory mineral (<1%) | |
| Ore mineral | Chalcopyrite | Accessory mineral (<1%) |
Lithology: |
| Relationship | Rock | Origin | |
| Unknown | Doleritt | Intrusive Original rock :Dolerite |
|
| Unknown | Gabbro | Intrusive Original rock :Gabbro |
|
| 535 (-46\+46) mill. years;..Method:Rb/Sr | |||
| Metamorphic facies :Greenschist |
Structures |
| Location: | Type: | Orientation(360 gr.): | Relation to min.: | |
| Unknown | Shear plane | Strike/Dip :18 / 76 | Syn-mineralisation ;...Effect :Controls |
Information(s) in free text format |
| Free text |
| The Bømlo deposits are mesothermal gold-bearing quartz veins in shear zones in the Lykling ophiolite complex, frequently following the contacts of dolerite dykes. The veins and their chloritised and carbonatised wallrocks are characterized by the presence of coarse-grained native gold, giving spectacular hand specimens that are extracted today. Analyses of bulk samples are normally in the range of 2–5 g/t Au. A few, minor Cu-Zn and Fe-sulphide (‘vasskis’) occurrences are related to metabasalts and felsic metavolcanic rocks overlying the ophiolite complex |
Bibliography: |
| From NGU's Reference Archive: |
| Amaliksen, Knut Gunnar , 1984 |
| Gullforekomster på Bømlo, Diamantboringer. |
| ;Norges geologiske undersøkelse;FAGRAPPORT;NGU-rapport; No.84.016;14 pages |
| Abstract: | |
| I rapporten framlegges borlogger med analyseresultater fra diamantboringene (Pack-Sack) på Haugesundsgangen og Harald Haarfagres gang, (to av Lyklingområdets) gullførende kvarts/skiferganger. Rapporten framlegges som et tillegg til NGU-rapport nr. 1750/35A. Borkjernene viser at mineraliseringen stort sett kun er knyttet til selve kvarts/skifergangene. Følgelig er malmvolumet lavt og av begrenset økonomisk intresse. |
| Wulff, Peter Wilhelm , 1996 |
| En befaring af cirka 100 mineraliseringer i Sunnhordland, SV-Norge |
| ;Norges geologiske undersøkelse;FAGRAPPORT;NGU-rapport; No.96.139;100 pages |
| Abstract: | |
| Forfatteren var sommeren 1994 engasjert av NGU for å gjøre et arbeid i Sunn- hordland i forbindelse med planlagt utgivelse av en publikasjon om Norges gullforekomster. Samtidig kunne Malmdatabasen gjøres ferdig for dette området. Rapporten beskriver resultatene av malmregistrering i Sunnhordland som om- fatter ca. 100 mineraliseringer. Disse er koordinatfestet og geologisk beskrevet. I tillegg er det gitt gruvehistoriske kommentarer av forekomstene og referanser. Resultatene fra denne rapport er innlagt i NGUs Malmdatabase. Rapporten gis av praktiske grunner ut i dansk språkform som den foreligger fra forfatter. |
| Wulff, P.; Stendal, H. , 1995 |
| Gold in Sunnhordland, the caledonides of southwestern Norway. [Abstract] |
| ;Grønlands geologiske undersøgelse;ARTIKKEL;Open file series; Gold mineralization in the Nordic countries and Greenland. Extended; abstracts; No.95/10;116-119 pages |
| Abstract: | |
| Conclusion The Palaeozoic supracrustal rocks of the Sunnhordland area is an important metallogenic zone with gold-bearing quartz veins and massive sulfide mineralization especially Cu and Zn associated with Au and Ag. The gold mineralization in most of the quartz veins is of the mesothermal type. Wulff (1993) and Christensen (1994) concluded that most quartz veins on Bømlo are spatially related to the Sunnhordland Fault Zone (SFZ) or the Hardangerfjord Fault Zone (HFZ). The quartz veins at Vernøy and Hovdaneset is situated not far from SFZ or HFZ thus indicating a relationship. In summary this study has shown that far from all interesting mineralization has been found in the highly prospective Sunnhordland area. The most prospective areas is considered to be along SFZ and HFZ. |
Fieldsamples |
| Sample No. | Sample type | Miscellanrous | |||
| Haugesundsgang-01 | Bedrock |
|
| NB! All analyse values are shown at the end of the printout.: |
Analyse Results |
| from |
| Deposit Area 4613 - 006 Haugesundgangen |
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# |
| Haugesundsgang-01 | Bedrock | 10850 | 62 | 24 | 8 | 8 | 13.2 | 6360.0 |
| ------------------ |
| Sample No. | As* | Cd* | Ba* | Mo* | Sn* | Sb* | Bi* | Se* | Ga* |
| Haugesundsgang-01 | 4 | 4.3 | 10 | 1.96 | 1 | 0 | 2 | 2.00 | 3.23 |
| ------------------ |
| Sample No. | Ge* | In* | S% | V* | Cr* | Mn* | Fe% | Th* | U* |
| Haugesundsgang-01 | -0.05 | 0.45 | 1.78 | 65 | 23 | 707 | 3.38 | 1.96 | 0.80 |
| ------------------ |
| Sample No. | W* | Rb* | Sr* | Y* | Zr* | Nb* | Ta* | Cs* | La* |
| Haugesundsgang-01 | 1 | 0.2 | 87.4 | 4.1 | 26 | 2.10 | 0.13 | 0.08 | 5.50 |
| ------------------ |
| Sample No. | Ce* | Li* | Be* | P* | Sc* | Ti* | Te* | Hf* | Re* |
| Haugesundsgang-01 | 13.40 | 5 | 0 | 440 | 6.20 | 900 | 0.93 | 0.60 | -0 |
| ------------------ |
| Sample No. | Tl* | ||||||||
| Haugesundsgang-01 | -0 |
| The fact sheet was created on 19.04.2024 |
| Questions or comments regarding the fact sheet can be emailed to: ressursdatabaser@ngu.no |
| Copyright © 2024 Geological Survey of Norway |