Show simple item record

dc.contributor.authorIhlen, Peter M.
dc.coverage.spatial18252 Majafjellet
dc.date.accessioned2020-07-15T08:35:03Z
dc.date.available2020-07-15T08:35:03Z
dc.date.issued1993
dc.identifier.issn0800-3416
dc.identifier.urihttps://hdl.handle.net/11250/2666288
dc.description.abstractThe report presents the corelog for 47 diamond-drillholes (total corelength: 3430 m) drilled by A.S. Sulfidmalm and Terra Mining A\/S in the periods 1980-82 and 1985-86, respectively. From the corelogs, the summary corelog-diagrams and the drillhole profiles several conclusions can be drawn regarding ore control and ore genesis. The native gold being generally fine-grained (1-100 um) is strongly intergrown with arsenopyrite and is only locally found as tiny visible grains. Mineralisation of economic potential occurs along a system of brittle dextral shear zones at the margin of the Early Silurian Oksdal granite massif. The mineralisation constitutes fracture fillings, veins and breccias of arseno- pyrite which nearly invariably are hosted by the competent granitoids and pre- existing quartz veins along the shear zones. Although not much can be said about average ore grades the deposit is estimated to have a total reserve potential in the range 550 000 - 850 000 tonnes for a 1 m wide and 100 m deep ore zone with ore density of 2,75 tonnes\/m3. 250 000 tonnes of this preliminary estimate probably contain enough gold for small scale mining. Further work is recommended. Frie emneord: Kaledonidene Malmpotensiale
dc.language.isoeng
dc.relation.ispartofseriesNGU-Rapport (93.003)
dc.rightsNavngivelse 4.0 Internasjonal
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/deed.no
dc.subjectMALMGEOLOGI
dc.subjectGULL
dc.subjectBORHULLSLOGGING
dc.titleThe Kolsvik Au-As-deposit, Bindal, North-Central Norway, I: Corelogs
dc.typeReport
dc.description.localcode34194
dc.source.pagenumber322


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record

Navngivelse 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Navngivelse 4.0 Internasjonal