revised: 05-Feb-2015

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

In the interests of standardization and interoperability, we are migrating our geologic maps into the USGS NCGMP09 data model. However, our well data model is still actively being used. Documentation for the NMBGMR geology data model is being provided for users with legacy data in this model. We also hope that it will provoke discussion in the ongoing effort to improve NCGMP09 and other models.

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)