Steve Ludington, USGS, Scientist Emeriti vector digital data 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). 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 None planned 91.975800 131.333844 53.790945 23.804001 None mineral resources None 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. USGS Steve Ludington Scientist Emeriti mailing and physical

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Menlo Park California 94025-3561 UNITED STATES 650-329-5371 650-329-5491 slud@usgs.gov Ludington, Steve, Mihalasky, M.J., Frost, T.P., Light, T.D., and Miller, R.J. Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcGIS 10.0.4.4000 Vector Entity point 86 8.9831528411952133e-009 8.9831528411952133e-009 Decimal Degrees D WGS 1984 WGS 1984 6378137.0 298.257223563 EASIA_pCu_Deposits_prospects Porphyry copper deposits and significant prospects in East Asia GMRAP OBJECTID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. Coded_ID Coded, unique identifier assigned to permissive tract Coded, unique identifier assigned to permissive tract GMRAP Tract_name Informal name of permissive tract containing this deposit or prospect. GMRAP NAME Site name GMRAP NAME_OTHER Other names used for the site GMRAP INCLUDES 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. GMRAP SITESTATUS 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. GMRAP deposit "deposit" is used if both Cu tonnage and grade have been reported for the site. GMRAP prospect "prospect" is used if site tonnage and grade information is not available. GMRAP occurrence "occurrence" refers to sites that have been mentioned in the report text, but do not meet the definition of deposit or prospect. GMRAP CODE_CNTRY 2-letter country code International Organization for Standardization(ISO)3166 Country Country(countries) in which deposit or prospect is located GMRAP STATE_PROV State or province GMRAP LATITUDE Latitude in decimal degrees. -90.000 to 90.000. Negative south of the equator. GMRAP LONGITUDE Longitude in decimal degrees. -180.000 to 180.000. Negative east of the Greenwich meridian. GMRAP AGE_MA 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. GMRAP Depo_Type 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. GMRAP Depo_Subty 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. GMRAP AGE_METHOD Method for absolute age determination GMRAP AGE_REF Short reference for age information. Inference means the age assignment was subjective, based on geologic inference GMRAP Strat_age Stratigraphic age of deposit GMRAP COMM_MAJOR Major commodities, expressed as chemical symbols GMRAP COMM_MINOR Minor commodities (byproducts, coproducts), expressed as chemical symbols GMRAP TONNAGE_MT Tonnage in millions of metric tons. GMRAP CU_PCT Average copper grade in weight percent. GMRAP MO_PCT Average molybdenum grade in weight percent. GMRAP AU_MO Ratio of Au (g/t) to Mo (wt. %), calculated GMRAP Au_ppm Average gold grade in parts per million GMRAP Ag_ppm Average silver grade in parts per million GMRAP Con_Cu_t Contained copper in metric tons, calculated GMRAP Comments1 comments regarding deposits and prospects, including partial tonnage and grade, if known GMRAP Comments2 Continuation of comments GMRAP DEV_STATUS 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. GMRAP Comments3 Continuation of comments GMRAP Geog_com Geographic name of mountain range, region, or metallogenic belt GMRAP Loc_com Comments regarding quality of location data GMRAP Ore_minera Ore and other sulfide minerals present, as reported in literature cited GMRAP Igneous_ro Names of igneous rocks associated with the deposit or prospect, as reported in literature cited GMRAP SOURCE Source of the record if the data are from an existing database. When source was other than from a specific database, "literature" is entered. GMRAP SOURCE_ID Unique identifier for the record used in the source database. Field is blank if source is literature. GMRAP UPDATER Name of person last updating the record GMRAP GMRAP_ID Unique GMRAP-defined identifier for each record. GMRAP Updated Date of update or addition to this database GMRAP Ref_short Abbreviated source reference. See SIR 2010-5090_X appendices for complete reference citation GMRAP Rank rank GMRAP Fig1_ID figure 1 ID GMRAP U.S. Geological Survey Information Services mailing

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