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Attribute definitions for mineral occurrences

 
The Greenland Mineral Occurence Map (GMOM) - Attribute definitions for mineral occurrences
For each locality or site on the Greenland Mineral Occurrence Map, a number of attributes describe details about the occurrence. The information becomes available in a table by clicking on a mineral occurrence on the map. For technical reasons to do with the ESRI Arc-environment, the attributes are names abbreviated to a maximum of 10 characters.

Attribute Description

Rec A GIS attribute – used internally by ArcIMS

FID A GIS attribute – used internally by ArcIMS

#SHAPE# A GIS attribute - point, line or polygon.

ID_No Identification number. Each mineral occurrence has been given a unique identification number. Closely situated, similar occurrences have been grouped and one has been chosen to represent the group, and the description is mainly based on this site.

Ref_ID_No Reference identification number. This give the site that has been chosen as the representative mineral occurrence of a group of occurrences, to which also this occurrence belongs.

MO_Name Mineral occurrence name. It refers to the name of the occurrence - in many cases will this name be a geographic place name.

Long_DD Longitude of the mineral occurrence given as decimal degrees. The reference system is World Geodetic System 1984 (WGS 84).

Lat_DD Latitude of the mineral occurrence given as decimal degrees. The reference system is World Geodetic System 1984 (WGS 84)

Signifi Significance of the mineral occurrence, expressed by a simple ranking into the following classes:
Mineral deposit or mine - denotes an operating mine, abandoned mine, or a mineral occurrence that is believed to have a high potential for becoming economically feasible; it could be considered uneconomic because of lack of sufficient information.
Mineral prospect - denotes a mineral occurrence, which has been drilled or investigated in some detail and is believed to have a moderate or small potential for becoming economically feasible.
Mineral showing - denotes a mineral occurrence, which has a significant concentration of ore minerals, but is believed to have no economic feasibility on its own.
Mineral indication - denotes a mineral occurrence of minor extent, with only a small concentration of ore minerals, or an occurrence for which information is currently limited.

UN_Code

United Nation Classification Code. A three digit code describing the economic significance according to the "United Nations international framework Classification for reserves/resources - Solid Fuels and Mineral Commodities" – see the figure here below. The three digit code – EFG - can be described as E = degree of Economic Viability, F = stage of Feasibility Assessment, and G = stage of Geological Assessment.


The following UN-Code Descriptions are relevant:

111
Economic (E1)
Feasibility Study/Mining report (F1)
Detailed exploration (G1)
121
Economic (E1)
Prefeasibility Study (F2)
Detailed exploration (G1)
122
Economic (E1)
Prefeasibility Study (F2)
General exploration (G2)
211
Potentially Economic (E2)
Feasibility study/Mining report (F1)
Detailed exploration (G1)
221
Potentially Economic (E2)
Prefeasibility study (F2)Detailed exploration (G1)
222
Potentially Economic (E2)
Prefeasibility study (F2)General exploration (G2)
331
Intrinsically Economic (E3)
Geological study (F3)
Detailed exploration (G1)
332
Intrinsically Economic (E3)
Geological study (F3)
General exploration (G2)
333
Intrinsically Economic (E3)
Geological study (F3)
Prospecting (G3)
334
Intrinsically Economic (E3)
Geological study (F3)
Reconnaissance (G1)


Figure from UN-ECE (1997).


Comm_Grp

Commodity group describes the main type of commodities present in the selected mineral occurrence according to the following table and examples of the elements/mineral included in the groupsCommodity group Geochemical elements/minerals

Base metals Cu, Pb, Zn, Sn
Light metals Al, Mg, Ti, Li
Iron and ferroalloys Fe, Mn, Cr, Ni, Co, Mo, W, V
Speciality metals REE, Y, Zr, Li, Be, As, Bi, Sb, Cd, Ga, Hg, Nb, Ta
Fissionable metals U, Th
Industrial minerals Graphite, phosphate, cryolite, sillimanite/kyanite, diopside, garnet
Gemstones Diamond, cordierite (dichroite), ruby

Comm_1 Commodity 1. The main commodity of interest – often the most important.

Comm_2 Commodity 2. The second most important commodity.

Comm_3 Commodity 3. The third most important commodity.

Other_Comm Other commodities. Any additional commodities present

GSC_Dep_Ty

Classification into mineral deposit types used by the Geological Survey of Canada for Canadian mineral deposits (Eckstrand et al. 1996), which is adopted here in a slightly modified form to accommodate Greenlandic mineral occurrences. Classifying geological phenomena always implies a degree of simplification and the use of these categories should be regarded as a general way to refer to Greenlandic mineral occurrences to internationally well-known types of mineral deposits:

1.0 Placer uranium, gold
1.2 Placer (Placer Au, Pt)
2.0 Stratiform phosphate
3.0 Stratiform iron
3.2 Algoma-type iron-formation
4.0 Residually enriched deposits
5.0 Evaporites
6.0 Exhalative base metal sulphides
6.3 Volcanic-associated massive sulphide base metals
6.4 Volcanic-associated massive sulphide gold
7.0 Unconformity-associated uranium
8.0 Stratabound clastic-hosted uranium, lead, copper
9.0 Volcanic redbed copper
10.0 Mississippi Valley-type lead-zinc
11.0 Ultramafic-hosted asbestos
12.0 Volcanic-associated uranium
13.0 Vein uranium
14.0 Arsenide vein silver, uranium
15.0 Lode gold
15.2 Quartz carbonate vein gold
15.3 Iron-formation-hosted stratabound gold
16.0 Clastic metasediment-hosted vein silver-lead-zinc
17.0 Vein copper and hydrothermal alteration (Vein copper)
18.0 Vein-stockwork tin, tungsten
19.0 Porphyry copper, gold, molybdenum, tungsten, tin, silver
20.0 Skarn deposit
21.0 Granitic pegmatites
22.0 Kiruna/Olympic Dam-type iron, copper, uranium, gold, silver
23.0 Peralkaline rock-associated rare metals
24.0 Carbonatite-associated deposits
25.0 Diamond (Primary diamond deposits)
25.1 Kimberlite-hosted diamond
26.0 Mafic intrusion (Mafic intrusion-hosted titanium-ore)
27.0 Magmatic nickel-copper-platinum group elements
27.2 Magmatic platinum group elements
28.0 Mafic/ultramafic rocks and related minerals (Mafic/ultramafic-hosted chromite)

*Main categories and selected sub-categories of Canadian mineral deposits types (Eckstrand et al. 1996) used to make a general classification of mineral occurrences in Greenland. Where categories are modified versions of the categories given by Eckstrand et al. (1996), the original names are given in parentheses.

Resources Identified resources for the selected mineral occurrence.

MO_Descrip A summary produced from available info on the selected mineral occurrence, in the form of a hyperlink to a pdf-file

Last_mod Date of latest editing or modification of the selected mineral occurrence.

Attribute definitions for mineral occurrences