Orogenic gold potential in Greenland. Reporting the mineral resource assessment workshop, 19- 21 November 2014

Jochen Kolb, Holger Paulick, Lars Lund Sørensen, Bo Møller Stensgaard, Diogo Rosa

Publikation: Bog/rapportRapport (offentligt tilgængelig)

Resumé

Within the framework of the Global Mineral Resource Assessment Project. Greenlandic orogenic gold resources were estimated to a depth of 1 km. Twenty-eight permissive tracts, covering an area of 254,324 km2, were assessed using what was identified as an appropriate grade/tonnage model, the recently compiled grade-tonnage model from the Finnish Geological Survey (GTK).

The statistical mean estimate number of unknown orogenic gold deposits, in all tracts, is of 66, which are estimated to contain a total of 1,150 metric tons of Au. Among these, 28 undiscovered gold deposits, accounting for an estimated 490 metric tons of Au, are estimated to exist in only six tracts, covering only 11,988 km2. These tracts, with the highest unknown deposit density, correspond to the Tartoq Gold Province (5 unknown deposits and 0.0057 unknown deposits per km2), the Paamiut Gold Province (3 unknown deposits and 0.0036 unknown deposits per km2), the contact of the Central and Southern domains of the Ketilidian Orogen in Western Greenland (6 unknown deposits, and 0.0035 unknown deposits per km2), the contact of the Central and Southern domains of the Ketilidian Orogen in Eastern Greenland (2 unknown deposits, and 0.0023 unknown deposits per km2), the Godthåbsfjord Gold Province (8 unknown deposits, and 0.0016 unknown deposits per km2), and the Ataa Gold Province (4 unknown deposits, 0.0016 unknown deposits per km2). Another 18 unknown orogenic gold deposits, estimated to contain a total of 319 metric tons of Au, are estimated to be present in the four large Caledonian Orogen tracts in East Greenland, extending over an area of 107,919 km2.

While the assessment process is formalised into models and methodology in order to reduce bias, and make these results comparable with those obtained elsewhere, the estimated total should be used with caution and should be regarded as a statistical estimate that reflects the present level of knowledge and investigations that have been undertaken in the assessed tracts. New information, new discoveries, new investigations etc. within a tract should thus, whenever possible, be taken into account while evaluating an area, as this could either decrease or increase its estimated potential.
OriginalsprogEngelsk
UdgivelsesstedCopenhagen
ForlagGEUS
Antal sider98
DOI
StatusUdgivet - 28 mar. 2017

Publikationsserier

NavnDanmarks og Grønlands Geologiske Undersøgelse Rapport
Nummer4
Vol/bind2017

Emneord

  • Greenland

Programområde

  • Programområde 4: Mineralske råstoffer

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