Update of the Mineral Resources Data System for California including Mineral Deposit Types

A version of the MRDS database for California with deposit types is provided in the files <MRDS_CA_Enhanced_with_Deposit_Moel_Data.xlsx. and .csv>. Other updates from the version of MRDS available at https://mrdata.usgs.gov/mrds/ include a column identifying duplicate entries (column C, dup_id) and improved consistency in columns representing commodity type (column K, com_type) and primary commodity (column L, commod1). No effort was made to remove or merge duplicate records. Deposit model number (column X, model_no) and model name (column Y, model_name) are explained in the metadata, and in tables 2 through 7. A data dictionary for tables 2 through 7 is provided in table 1. Table 2 <T2_Depsosit-type-comparison.xlsx and .csv> includes a comparison of USGS model types and provisional model types described here with mineral deposit classification systems used in Brazil and Canada. Table 3 <T3_California-deposit-types.xlsx and .csv> includes reference citations for the USGS deposit types identified in California, information on commodities and tectonic classification, and an example of each deposit type in California and outside California. Table 4 <T4_Provisional-deposit-types.xlsx and .csv> lists descriptions of provisional deposit types and an example within California. Table 5 <T5_Miscellaneous-categories.xlsx and .csv> lists several miscellaneous categories included in MRDS. Table 6 <T6_Deposit-types-by-county.xlsx and .csv> lists the number of occurrences of each deposit type in each of the 58 counties of California. Table 7 <T7_Deposit-types-by-county-sorted-by-abundance.xlsx and .csv> lists the same information as in Table 6 sorted by the total number of occurences of each deposit type. The file <References_Tables2-4.pdf> includes references cited in Tables 2, 3, and 4.