GMC Minerals Summary Explanation

Mineral Prospect Inventory Header

Item	Definition
Company	Only available for prospects with no detailed inventory
Prospect Name	GMC listed prospect name
Mystery Dot
Location Type	Type of geolocation for prospect (see details below)
USGS ARDF #	Unique United States Geological Survey label assigned to each site. First two letters comprise the quadrangle code, followed by a three digit number.
GMC Data Report	None or see web link at bottom of balloon
Minerals Summary Explanation	This file
Reality Check	Link to web page for advice and data limitations
Alaska GMC	Link to GMC web page

Location Type

Value	Definition
Single Prospect	Average location of boreholes
Prospects Group	Represents average of two or more prospects
Claim Area	Center of claim area
Area Centroid	Center of geographic area such as basin or island
Unresolved	No lat/long location

Mineral Prospect Borehole Summary

Item	Definition
Borehole	"-blank-" if empty or partial/full borehole #
Top	Borehole top of available samples at GMC
Bottom	Borehole bottom of available samples at GMC
Box Count	Number of intervals with samples inventoried for borehole
Core Size	Generic references to core diameter (see details below)
Sample Type	Description of the core or sample's current form (see details below)

Core Size

Value	Definition
E core	About 21.6/.85 (mm/in)
A core	About 27.0/1.1 (mm/in)
B core	About 36.5/1.4 (mm/in)
N core	About 47.6/1.9 (mm/in)
H core	About 63.5/2.5 (mm/in)
P core	About 85.0/3.3 (mm/in)
Mixed Core Sizes	Several different core diameters
Other	Such as chips or hand samples

Sample Type

Value	Definition
Whole	Undivided core
Half Cut	Core cut in half
Split	Core cracked in half
Chips	Pea-gravel chips of unknown preparation
Residue	Core fallen out of box
Mixed	Mixed core and hand samples
Hand	Hand samples
Empty	Core box is empty

Still have questions? Feel free to view the formal metadata.