<metadata>
<idinfo>
<citation>
<citeinfo>
<origin>Steve Ludington, USGS, Scientist Emeriti</origin>
<title>EASIA_pCu_Deposits_prospects</title>
<geoform>vector digital data</geoform>
</citeinfo>
</citation>
<descript>
<abstract>Mineral resource assessments provide a synthesis of available information about the distribution of mineral deposits in the Earth's crust. A probabilistic mineral resource assessment of undiscovered resources in porphyry copper deposits in China, eastern Mongolia, and eastern Russia was done as part of a global mineral resource assessment. The assessment was conducted using a three-part form of mineral resource assessment based on mineral deposit models (Singer, 1993). Refer to the accompanying mineral resource assessment report for additional details. This shapefile represents the locations and attributes of porphyry copper deposits and significant prospects compiled for the porphyry copper assessment. The digital data are provided as a shapefile (ESRI ArcMap version 9.3).</abstract>
<purpose>To: (1) delineate permissive areas (tracts) where undiscovered porphyry copper deposits may occur within the upper 1 km of the Earth's crust; (2) provide a database of known porphyry copper deposits and significant prospects; (3) estimate numbers of undiscovered deposits within those permissive tracts; and (4) provide probabilistic estimates of amounts of copper (Cu), molybdenum (Mo), gold (Au), and silver (Ag) that could be contained in undiscovered deposits for each permissive tract</purpose>
</descript>
<status>
<update>None planned</update>
</status>
<spdom>
<bounding>
<westbc>91.975800</westbc>
<eastbc>131.333844</eastbc>
<northbc>53.790945</northbc>
<southbc>23.804001</southbc>
</bounding>
</spdom>
<keywords>
<theme>
<themekt>None</themekt>
<themekey>mineral resources</themekey>
</theme>
</keywords>
<accconst>None</accconst>
<useconst>This spatial database is not meant to be used or displayed at any scale larger than 1:1,000,000 (for example, 1:500,000). Any hardcopies utilizing these datasets shall clearly indicate their source. If the user has modified the data in any way, they are obligated to describe the types of modifications they have performed on the hardcopy map. User specifically agrees not to misrepresent these data sets, nor imply that changes they made were approved by the U.S. Geological Survey.</useconst>
<ptcontac>
<cntinfo>
<cntorgp>
<cntorg>USGS</cntorg>
<cntper>Steve Ludington</cntper>
</cntorgp>
<cntpos>Scientist Emeriti</cntpos>
<cntaddr>
<addrtype>mailing and physical</addrtype>
<address>345 Middlefield Road</address>
<address>Room 2214</address>
<city>Menlo Park</city>
<state>California</state>
<postal>94025-3561</postal>
<country>UNITED STATES</country>
</cntaddr>
<cntvoice>650-329-5371</cntvoice>
<cntfax>650-329-5491</cntfax>
<cntemail>slud@usgs.gov</cntemail>
</cntinfo>
</ptcontac>
<datacred>Ludington, Steve, Mihalasky, M.J., Frost, T.P., Light, T.D., and Miller, R.J.</datacred>
<native>Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcGIS 10.0.4.4000</native>
</idinfo>
<spdoinfo>
<direct>Vector</direct>
<ptvctinf>
<sdtsterm>
<sdtstype>Entity point</sdtstype>
<ptvctcnt>86</ptvctcnt>
</sdtsterm>
</ptvctinf>
</spdoinfo>
<spref>
<horizsys>
<geograph>
<latres>8.9831528411952133e-009</latres>
<longres>8.9831528411952133e-009</longres>
<geogunit>Decimal Degrees</geogunit>
</geograph>
<geodetic>
<horizdn>D WGS 1984</horizdn>
<ellips>WGS 1984</ellips>
<semiaxis>6378137.0</semiaxis>
<denflat>298.257223563</denflat>
</geodetic>
</horizsys>
</spref>
<eainfo>
<detailed>
<enttyp>
<enttypl>EASIA_pCu_Deposits_prospects</enttypl>
<enttypd>Porphyry copper deposits and significant prospects in East Asia</enttypd>
<enttypds>GMRAP</enttypds>
</enttyp>
<attr>
<attrlabl>OBJECTID</attrlabl>
<attrdef>Internal feature number.</attrdef>
<attrdefs>ESRI</attrdefs>
<attrdomv>
<udom>Sequential unique whole numbers that are automatically generated.</udom>
</attrdomv>
</attr>
<attr>
<attrlabl>Shape</attrlabl>
<attrdef>Feature geometry.</attrdef>
<attrdefs>ESRI</attrdefs>
<attrdomv>
<udom>Coordinates defining the features.</udom>
</attrdomv>
</attr>
<attr>
<attrlabl>Coded_ID</attrlabl>
<attrdef>Coded, unique identifier assigned to permissive tract Coded, unique identifier assigned to permissive tract</attrdef>
<attrdefs>GMRAP</attrdefs>
</attr>
<attr>
<attrlabl>Tract_name</attrlabl>
<attrdef>Informal name of permissive tract containing this deposit or prospect.</attrdef>
<attrdefs>GMRAP</attrdefs>
</attr>
<attr>
<attrlabl>NAME</attrlabl>
<attrdef>Site name</attrdef>
<attrdefs>GMRAP</attrdefs>
</attr>
<attr>
<attrlabl>NAME_OTHER</attrlabl>
<attrdef>Other names used for the site</attrdef>
<attrdefs>GMRAP</attrdefs>
</attr>
<attr>
<attrlabl>INCLUDES</attrlabl>
<attrdef>Names of deposits that have been combined with the primary deposit as a result of the spatial aggregation rule used for calculating grades and tonnages. For porphyry copper, the spatial rule is 2 km.</attrdef>
<attrdefs>GMRAP</attrdefs>
</attr>
<attr>
<attrlabl>SITESTATUS</attrlabl>
<attrdef>Development status of the site. Values are "deposit" or "prospect". Deposit means the site has both tonnage and grade reported for the principal commodity (Cu for porphyry copper). Prospect applies to all other sites.</attrdef>
<attrdefs>GMRAP</attrdefs>
<attrdomv>
<edom>
<edomv>deposit</edomv>
<edomvd>"deposit" is used if both Cu tonnage and grade have been reported for the site.</edomvd>
<edomvds>GMRAP</edomvds>
</edom>
</attrdomv>
<attrdomv>
<edom>
<edomv>prospect</edomv>
<edomvd>"prospect" is used if site tonnage and grade information is not available.</edomvd>
<edomvds>GMRAP</edomvds>
</edom>
</attrdomv>
<attrdomv>
<edom>
<edomv>occurrence</edomv>
<edomvd>"occurrence" refers to sites that have been mentioned in the report text, but do not meet the definition of deposit or prospect.</edomvd>
<edomvds>GMRAP</edomvds>
</edom>
</attrdomv>
</attr>
<attr>
<attrlabl>CODE_CNTRY</attrlabl>
<attrdef>2-letter country code</attrdef>
<attrdefs>International Organization for Standardization(ISO)3166</attrdefs>
</attr>
<attr>
<attrlabl>Country</attrlabl>
<attrdef>Country(countries) in which deposit or prospect is located</attrdef>
<attrdefs>GMRAP</attrdefs>
</attr>
<attr>
<attrlabl>STATE_PROV</attrlabl>
<attrdef>State or province</attrdef>
<attrdefs>GMRAP</attrdefs>
</attr>
<attr>
<attrlabl>LATITUDE</attrlabl>
<attrdef>Latitude in decimal degrees. -90.000 to 90.000. Negative south of the equator.</attrdef>
<attrdefs>GMRAP</attrdefs>
</attr>
<attr>
<attrlabl>LONGITUDE</attrlabl>
<attrdef>Longitude in decimal degrees. -180.000 to 180.000. Negative east of the Greenwich meridian.</attrdef>
<attrdefs>GMRAP</attrdefs>
</attr>
<attr>
<attrlabl>AGE_MA</attrlabl>
<attrdef>Ages are reported in millions of years before the present based on reported absolute ages. This field is blank if no absolute age determination was available.</attrdef>
<attrdefs>GMRAP</attrdefs>
</attr>
<attr>
<attrlabl>Depo_Type</attrlabl>
<attrdef>Porphyry Cu applies to most sites. Porphyry Cu, skarn-related applies to sites where most of the ore is skarn. Porphyry Mo-Cu applies to a class of deposits with low Cu grades and with Mo and Cu grades subequal.</attrdef>
<attrdefs>GMRAP</attrdefs>
</attr>
<attr>
<attrlabl>Depo_Subty</attrlabl>
<attrdef>For the porphyry copper type, deposits and prospects may be classified as the general type or a subtype may specified in the reference cited. Subtype may be based on ratio of Au (in g/t) to Mo in (wt.%) or may be based on geologic indications. Two subtypes may be entered if the the deposit meets the criteria for both.</attrdef>
<attrdefs>GMRAP</attrdefs>
</attr>
<attr>
<attrlabl>AGE_METHOD</attrlabl>
<attrdef>Method for absolute age determination</attrdef>
<attrdefs>GMRAP</attrdefs>
</attr>
<attr>
<attrlabl>AGE_REF</attrlabl>
<attrdef>Short reference for age information. Inference means the age assignment was subjective, based on geologic inference</attrdef>
<attrdefs>GMRAP</attrdefs>
</attr>
<attr>
<attrlabl>Strat_age</attrlabl>
<attrdef>Stratigraphic age of deposit</attrdef>
<attrdefs>GMRAP</attrdefs>
</attr>
<attr>
<attrlabl>COMM_MAJOR</attrlabl>
<attrdef>Major commodities, expressed as chemical symbols</attrdef>
<attrdefs>GMRAP</attrdefs>
</attr>
<attr>
<attrlabl>COMM_MINOR</attrlabl>
<attrdef>Minor commodities (byproducts, coproducts), expressed as chemical symbols</attrdef>
<attrdefs>GMRAP</attrdefs>
</attr>
<attr>
<attrlabl>TONNAGE_MT</attrlabl>
<attrdef>Tonnage in millions of metric tons.</attrdef>
<attrdefs>GMRAP</attrdefs>
</attr>
<attr>
<attrlabl>CU_PCT</attrlabl>
<attrdef>Average copper grade in weight percent.</attrdef>
<attrdefs>GMRAP</attrdefs>
</attr>
<attr>
<attrlabl>MO_PCT</attrlabl>
<attrdef>Average molybdenum grade in weight percent.</attrdef>
<attrdefs>GMRAP</attrdefs>
</attr>
<attr>
<attrlabl>AU_MO</attrlabl>
<attrdef>Ratio of Au (g/t) to Mo (wt. %), calculated</attrdef>
<attrdefs>GMRAP</attrdefs>
</attr>
<attr>
<attrlabl>Au_ppm</attrlabl>
<attrdef>Average gold grade in parts per million</attrdef>
<attrdefs>GMRAP</attrdefs>
</attr>
<attr>
<attrlabl>Ag_ppm</attrlabl>
<attrdef>Average silver grade in parts per million</attrdef>
<attrdefs>GMRAP</attrdefs>
</attr>
<attr>
<attrlabl>Con_Cu_t</attrlabl>
<attrdef>Contained copper in metric tons, calculated</attrdef>
<attrdefs>GMRAP</attrdefs>
</attr>
<attr>
<attrlabl>Comments1</attrlabl>
<attrdef>comments regarding deposits and prospects, including partial tonnage and grade, if known</attrdef>
<attrdefs>GMRAP</attrdefs>
</attr>
<attr>
<attrlabl>Comments2</attrlabl>
<attrdef>Continuation of comments</attrdef>
<attrdefs>GMRAP</attrdefs>
</attr>
<attr>
<attrlabl>DEV_STATUS</attrlabl>
<attrdef>Development Status - the nature of operations at the time the deposit record was created; most values are exploration (the default) and mining, when mining operations are known at the site.</attrdef>
<attrdefs>GMRAP</attrdefs>
</attr>
<attr>
<attrlabl>Comments3</attrlabl>
<attrdef>Continuation of comments</attrdef>
<attrdefs>GMRAP</attrdefs>
</attr>
<attr>
<attrlabl>Geog_com</attrlabl>
<attrdef>Geographic name of mountain range, region, or metallogenic belt</attrdef>
<attrdefs>GMRAP</attrdefs>
</attr>
<attr>
<attrlabl>Loc_com</attrlabl>
<attrdef>Comments regarding quality of location data</attrdef>
<attrdefs>GMRAP</attrdefs>
</attr>
<attr>
<attrlabl>Ore_minera</attrlabl>
<attrdef>Ore and other sulfide minerals present, as reported in literature cited</attrdef>
<attrdefs>GMRAP</attrdefs>
</attr>
<attr>
<attrlabl>Igneous_ro</attrlabl>
<attrdef>Names of igneous rocks associated with the deposit or prospect, as reported in literature cited</attrdef>
<attrdefs>GMRAP</attrdefs>
</attr>
<attr>
<attrlabl>SOURCE</attrlabl>
<attrdef>Source of the record if the data are from an existing database. When source was other than from a specific database, "literature" is entered.</attrdef>
<attrdefs>GMRAP</attrdefs>
</attr>
<attr>
<attrlabl>SOURCE_ID</attrlabl>
<attrdef>Unique identifier for the record used in the source database. Field is blank if source is literature.</attrdef>
<attrdefs>GMRAP</attrdefs>
</attr>
<attr>
<attrlabl>UPDATER</attrlabl>
<attrdef>Name of person last updating the record</attrdef>
<attrdefs>GMRAP</attrdefs>
</attr>
<attr>
<attrlabl>GMRAP_ID</attrlabl>
<attrdef>Unique GMRAP-defined identifier for each record.</attrdef>
<attrdefs>GMRAP</attrdefs>
</attr>
<attr>
<attrlabl>Updated</attrlabl>
<attrdef>Date of update or addition to this database</attrdef>
<attrdefs>GMRAP</attrdefs>
</attr>
<attr>
<attrlabl>Ref_short</attrlabl>
<attrdef>Abbreviated source reference. See SIR 2010-5090_X appendices for complete reference citation</attrdef>
<attrdefs>GMRAP</attrdefs>
</attr>
<attr>
<attrlabl>Rank</attrlabl>
<attrdef>rank</attrdef>
<attrdefs>GMRAP</attrdefs>
</attr>
<attr>
<attrlabl>Fig1_ID</attrlabl>
<attrdef>figure 1 ID</attrdef>
<attrdefs>GMRAP</attrdefs>
</attr>
</detailed>
</eainfo>
<distinfo>
<distrib>
<cntinfo>
<cntorgp>
<cntorg>U.S. Geological Survey Information Services</cntorg>
</cntorgp>
<cntaddr>
<addrtype>mailing</addrtype>
<address>P.O. Box 25286</address>
<address>Denver Federal Center</address>
<city>Denver</city>
<state>Colorado</state>
<postal>80225</postal>
<country>UNITED STATES</country>
</cntaddr>
<cntvoice>(888) ASK-USGS</cntvoice>
<cntemail>infoservices@usgs.gov</cntemail>
</cntinfo>
</distrib>
<distliab>See access and use constraints information.</distliab>
<stdorder>
<digform>
<digtopt />
</digform>
</stdorder>
</distinfo>
<metainfo>
<metd>20121114</metd>
<metc>
<cntinfo>
<cntorgp>
<cntorg>USGS</cntorg>
<cntper>Connie L Dicken</cntper>
</cntorgp>
<cntpos>Geologist/GIS Specialist</cntpos>
<cntaddr>
<addrtype>mailing and physical</addrtype>
<address>12201 Sunrise Valley Dr. MS954</address>
<city>Reston</city>
<state>Virginia</state>
<postal>20192</postal>
<country>UNITED STATES</country>
</cntaddr>
<cntvoice>703-648-6482</cntvoice>
<cntfax>703-648-6252</cntfax>
<cntemail>cdicken@usgs.gov</cntemail>
</cntinfo>
</metc>
<metstdn>FGDC Content Standard for Digital Geospatial Metadata</metstdn>
<metstdv>FGDC-STD-001-1998</metstdv>
<mettc>local time</mettc>
</metainfo>
</metadata>