NMBGMR Draft Geologic Data Model - v. 1.0.4
POLYGONS: Mining, Mineralization, & Alteration

revised: 15-Nov-2013

Contents:

Feature Class: Mine_poly

This feature class represents areas affected by mining. The polygons are build from Mine_line. Point features like adits and prospects can be recorded in Mine_point.

Field Name Field Alias Length
(text fields)
Field Type Field Value Default Allow Nulls? Attributes / Examples Description / Notes
FGDC_code " 16 String variable [null] TRUE 30.3.12 FGDC geologic symbol reference number.
MineID " 50 String variable [null] TRUE tailings #1, open pit Single code for polygon identification
Label " 50 String variable [null] TRUE tailings #1, open pit MineID +/- query
MineClass " 50 String variable [null] TRUE dump, mined area, etc

Class of mine area

MineType " 50 String variable [null] TRUE

as needed

 
MineSubTyp MineSubType 50 String variable [null] TRUE

as needed

 
Confidence " 16 String CVD [null] TRUE unspecified, certain, probable, uncertain

confidence regarding feature level ID

Subsurface "   Small integer boolean 0 FALSE 1=subsurface, 0=above surface TRUE for features beneath the ground surface and FALSE for features at ground surface.
General_ID Generalized_ID 50 String variable [null] TRUE

as needed

How to Generalize this polygon.
SourceID " 128 String variable [null] TRUE unknown; unspecified; Smith, 2006b [variable] Feature level metadata (who mapped this); related to bibliographic detail
Descriptn Description 255 String variable [null] TRUE Description of area of polygon (feature level)  

Feature Class: Mineral_poly

This feature class represents overlays for mineralization zones. The polygons are build from Mineral_line. Point features like small pegmatites can be recorded in either Mineral_point, Feature_point, or Data_point.

Field Name Field Alias Length
(text fields)
Field Type Field Value Default Allow Nulls? Attributes / Examples Description / Notes
FGDC_code " 16 String variable [null] TRUE 30.3.12 FGDC geologic symbol reference number.
MinID " 50 String variable [null] TRUE Argillic, Potassic, Hydrothermal, etc. Single code for polygon identification
Label " 50 String variable [null] TRUE Au, Ag? MinID +/- query
MinClass MineralizationClass 50 String CVD [null] TRUE unspecified, disseminated, pegmatite,vein, carbonatite, stratabound, breccia, beach placer, porphyry, skarn, carbonate replacement

Class of mineralization

MinType MineralizationType 50 String CVD [null] TRUE

disseminated: Syenite/gabbro-hosted Cu-Ag-PGE, Y-Zr deposits in alkaline rocks, other [specify]

pegmatite:
qtz-feldspar-mica, qtz-feldspar-mica-REE qtz-feldspar-mica-Nb-Ta qrtz-feldspar-mica-Be, other [specify]

vein:
polymetallic fluorite, REE-Th-U, Cu, Au, Ag, Mo, quartz, calcite, Mn, other [specify]

stratabound:
sedimentary copper, limestone uranium, sandstone uranium, replacement iron

breccia:
U collapse, Cu-U collapse, polymetallic

porphyry:
Cu, Cu-Au, Cu-Mo, Mo

skarn:
Cu-Pb-Zn, Fe

carbonate replacement:
Mn, Mn-Ag, Ag, Pb-Zn-Cu

placer: Au, W, Sn

 
MinSubType MineralizationSubType 50 String variable [null] TRUE ? As needed
Confidence " 16 String CVD [null] TRUE unspecified, certain, probable, uncertain

confidence regarding feature level ID

Subsurface "   Small integer boolean 0 FALSE 1=subsurface, 0=above surface TRUE for features beneath the ground surface and FALSE for features at ground surface.
General_ID Generalized_ID 50 String variable [null] TRUE Propylitic How to Generalize this polygon.
SourceID " 128 String variable [null]   unknown; unspecified; Smith, 2006b [variable] Feature level metadata (who mapped this); related to bibliographic detail
Descriptn Description 255 String variable [null] TRUE Description of area of polygon (feature level)  

Feature Class: Alter_poly

This feature class represents overlays for alteration zones. The polygons are build from Alter_line. Features like mineshafts, prospects, and other mining and mineral related point data can be recorded in either Feature_point or Data_point.

Field Name Field Alias Length
(text fields)
Field Type Field Value Default Allow Nulls? Attributes / Examples Description / Notes
FGDC_code " 16 String variable [null] TRUE 30.3.12 FGDC geologic symbol reference number.
AltID " 50 String variable [null] TRUE Argillic, Potassic, Hydrothermal, etc. Single code for polygon identification
Label " 50 String variable [null] TRUE Argillic?, Au, Ag? AltID +/- query
AltClass AlterationClass 50 String CVD [null] TRUE unspecified, silification, propylitic, sericitic, potassic, albitic, silication, carbonatization, alunitization, argillic, advanced argillic, zeolitization, serpenitinization, talc alteration, oxidation, skarns, hematitization, brecciation, pyrite

Class of alteration

AltType AlterationType 50 String CVD [null] TRUE

silication: greisenization jasperoids

oxidation: supergene, weathering

skarns: calc-silicates, marble, hornfels

 
AltSubType AlterationSubType 50 String CVD [null] TRUE ? As needed
Confidence " 16 String CVD [null] TRUE unspecified, certain, probable, uncertain

confidence regarding feature level ID

Subsurface "   Small integer boolean 0 FALSE 1=subsurface, 0=above surface TRUE for features beneath the ground surface and FALSE for features at ground surface.
General_ID Generalized_ID 16 String variable [null] TRUE Propylitic How to Generalize this polygon.
SourceID " 128 String variable [null]   unknown; unspecified; Smith, 2006b [variable] Feature level metadata (who mapped this); related to bibliographic detail
Descriptn Description 255 String variable [null] TRUE Description of area of polygon (feature level)