Database fields, all categories

Site identification
	`DEP_ID`	A unique 12-digit system generated sequence number which references records of information pertaining to a mineral property
	`MRDS_ID`	Identification number used to refer to this entry in the Mineral Resources Data System, if the record appeared in that database.
	`MAS_ID`	Identification number for this site as it appeared in the Mineral Availability System/Mineral Industry Locator System database,
	`SITE_NAME`	Current (preferred) form of the name of the site, deposit, or operation to which the record refers.
Geographic location
	`LATITUDE`	Geographic latitude of the site (no specific datum applies; use NAD27 if needed)
	`LONGITUDE`	Geographic longitude of the site (no specific datum applies; use NAD27 if needed)
	`REGION`	Code indicating the geographic region
	`COUNTRY`	Name of the country in which the site is located
	`STATE`	Name of the state or province in which the site is located
	`COUNTY`	Name of the county in which the site is located
Site characteristics
	`OPER_TYPE`	Type of operation existing or proposed at the site.
	`DEP_TYPE`	General type of deposit or resource present at the site.
	`PROD_SIZE`	A broad characterization of the magnitude of production at the site.
	`DEV_STAT`	Status of development of the resource or operation.
	`ORE`	Name of the ore mineral or material found in this deposit.
	`GANGUE`	Name of the gangue mineral or material found in this deposit.
	`OTHER_MATL`	Name of other minerals or materials found in this deposit.
	`OREBODY_FM`	Form and shape of the ore body.
	`WORK_TYPE`	General type of workings at the site.
	`MODEL`	Mineral deposit models that characterize the site. Multiple models are delimited by braces, with a model number for each.
	`ALTERATION`	Geochemical alteration, if any, believed to have been important in forming or modifying the ore materials of a deposit.
	`CONC_PROC`	Geological processes that are believed to have occurred to concentrate ore materials in the deposit
	`PREV_NAME`	Names by which the site or operation has bee known in the past.
	`ORE_CTRL`	Geologic features, typically structural, that exert control over the form, extent, or character of the deposit.
	`REPORTER`	Names of the persons primarily responsible for entering information about the site.
	`HROCK_UNIT`	Lithologic and stratigraphic information regarding the host rocks for the ore deposit
	`HROCK_TYPE`	Controlled term(s) indicating the type of host rocks, taken from Lithclass 6.2
	`AROCK_UNIT`	Lithologic and stratigraphic information regarding the rocks for the ore deposit that are not specifically identified as host ro
	`AROCK_TYPE`	Controlled term(s) indicating the type of associated rocks, taken from Lithclass 6.2
	`STRUCTURE`	Description of geological structures at or near the deposit.
	`TECTONIC`	Description of tectonic setting within which the deposit is found, includes regional geologic structure.
	`REF`	Bibliographic references providing information supporting the database record. Braces delimit multiple references.
	`YFP_BA`	Value < indicates production first began before the year specified in YR_FST_PRD; > indicates production began after that year.
	`YR_FST_PRD`	Year of first production at the site. May be modified by YFP_BA.
	`YLP_BA`	Value < indicates production ended before the year specified in YR_LST_PRD; > indicates production ended after that year.
	`YR_LST_PRD`	Year of last production at the site. May be modified by YLP_BA.
	`DY_BA`	If present, < in this field indicates that discovery occurred prior to the value in DISC_YR; likewise > indicates discovery occu
	`DISC_YR`	Year the site was discovered. The value of DY_BA may modify the meaning of this value.
	`PROD_YRS`	Description of the production history, including breaks or interruptions between first and last production years.
	`DISCR`	Name and address (if known) of the company, organization, or person most closely associated with the discovery of the resource.
Commodities
	`COM_TYPE`	Type of commodities present: metallic (M), non-metallic (N), or both (B)
	`COM_MAJOR`	Major commodities present, a comma-separated list. Commodity qualifiers follow each commodity, delimited by a hyphen.
	`COM_MINOR`	Minor commodities present, a comma-separated list. Commodity qualifiers follow each commodity, delimited by a hyphen.
	`COM_TRACE`	Trace commodities present, a comma-separated list. Commodity qualifiers follow each commodity, delimited by a hyphen.