UNITED STATES DEPARTMENT OF THE INTERIOR GEOLOGICAL SURVEY Data used to prepare a map showing the location of significant gold mines in Montana by David Frishman(1), J. E. Elliott(1), E. E. Foord(1), R. C. Pearson(1) and W. H. Raymond(1) Open-File Report 90-0242A (paper copy) and 90-0242B (diskette) 1990 Any use of trade names is for descriptive purposes only and does not imply endorsement by the U.S. Geological Survey. This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards and stratigraphic nomenclature. Although these data have been used by the U.S. Geological Survey and have been successfully imported into a number of database and spreadsheet programs, no warranty, expressed or implied, is made by the USGS as to how successfully or accurately the data can be imported into any specific application software running on any specific hardware platform. The fact of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in connection therewith. (1)U.S. Geological Survey Denver, Colorado 80225-0046 Contents Page Section 1. Text ............................................. 1 Introduction ................................... 1 Authorship and Acknowledgements ..................... 1 Computer Files ................................. 1 References Cited ................................ 8 Section 2. Data for Map Compilation ............................... 9 Section 3. Sources of Data ..................................... 92 Illustrations Table 1. Structure of MT-AU.ASC ................................ 4 2. Structure of MTAUSUB1.ASC and MTAUSUB2.ASC ............. 6 3. Structure of MTAUREFS.ASC ............................ 8 Section 1. INTRODUCTION Frishman and others (1990) presented a map showing the location of placer and lode mines and prospects in Montana that produced or might be capable of producing more than 500 troy ounces of gold. This report and diskette contain the data used to prepare that map and its accompanying text. The data are being made available both in paper copy and as ASCH files distributed on a diskette for use with computer database or spreadsheet programs. AUTHORSHIP AND ACKNOWLEDGMENTS W. H. Raymond compiled all the data for placer mines. For the lode mines and prospects, responsibilities for data compilation were divided among the authors based on latitude and longitude. R. C. Pearson compiled data for lode mines and prospects between 45° and 46° north latitude, 111° and 114° west longitude (the Dillon l°x 2° quadrangle and the western half of the Bozeman l°x 2° quadrangle); J. E. Elliott compiled data for lode mines and prospects between 46° and 47° north, 112° and 114° west (the Butte quadrangle) and 45° and 46° north, 109° and 111° west (the west half of the Billings and the east half of the Bozeman quadrangle); and E. E. Foord compiled data for mines and prospects between 46° and 47° north, 110° and 112° west (the White Sulphur Springs quadrangle). D. Frishman compiled data for the remainder of the State, merged and edited the data, produced the computer files, and organized and prepared this report. The authors appreciate the suggestions made by Anna Wilson of the U.S. Geological Survey. Data were initially compiled using a computer program written by R. B. Taylor and others (1986). Susan Huffman of the U.S. Geological Survey Technology Information Center modified and compiled this program to suite our specific needs and her help is gratefiilly acknowledged. COMPUTER FILES The diskette contains ten files. Three of these files correspond to the three sections of the paper copy of this document. The other seven files duplicate the data contained in the first three but these seven files are in a slightly different format as explained below. Filename Contents MTAU.DOC Section 1 of the paper copy-this text MT-AUASC Section 2 of the paper copy-comma- and quote-delimited data used to prepare the map (Frishman and others, 1990). MTAUSUB1ASC Same as MT-AUASC but broken into two subsets for use in programs MTAUSUB2ASC that will not accept long input lines (see below) MTAUREFS.DOC Section 3 of paper copy-Sources of Data in bibliographic format. MTAUREFS ASC Comma- and quote delimited version of MTAUREFS.DOC. MTAUAUTHASC Four comma- and quote-delimited files that together contain the same MTAUDATEASC information as do MTAUREFS.DOC and MTAUREFSASC. MTAUTITLASC MTAUCITEASC The contents of the files on the diskette are described hi more detail below. File MTAU.DOC (= paper copy Section 1): This text. File MT-AU.ASC (= paper copy Section 2): A comma- and quote-delimited ASCII file containing all the information used to construct the map (plus accompanying text) showing gold mines and prospects in Montana (Frishman and others, 1990). The comma- and quote-delimited format was chosen because we felt it was the most generic format available and would be acceptable as input for the largest number of database and spreadsheet programs. MT-AU.ASC contains all the data; the longest ASCII string in this file is 344 characters including spaces and delimiters. The structure of this file is shown in table 1. Files MTAUSUB1.ASC and MTAUSUB2.ASC (not included in the paper copy): Two comma- and quote-delimited files provided for use in those programs that will not accept an input string over 254 or 255 characters. These abbreviated versions are structured as shown in table 2. Together, MTAUSUB1.ASC AND MTAUSUB2.ASC contain all the information in MT-AU.ASC. The fields for map number, site name, and the references are included in both of the abbreviated files. In MTAUSUB1, the longest single ASCII string is 249 characters, in MTAUSUB2 it is 227 characters (including spaces and delimiters). File MTAUREFS.DOC (= paper copy Section 3): An ASCH file listing bibliographic citations for the references used as sources of data. This file is a text file formatted as a conventional reference list. File MTAUREFS.ASC (not included in paper copy): Contains the same data as MTAUREFS.DOC but in comma- and quote delimited format. The numerical key to these references are the numbers in the "Sources of data" fields, fields "Ref. 1" though "Ref. 5." The structure of MTAUREFS.ASC is shown in table 3; the longest ASCII string in the file is 371 characters including spaces and delimiters. Files MTAUAUTH.ASC (authors), MTAUDATE.ASC (date), MTAUTTTL.ASC (title) and MTAUCITE.ASC (citation) (not included in paper copy): Four files duplicating the information in MTAUREFS.ASC provided for those programs that will not accept long input strings. Each file contains the reference number numeric key (field 1 from MTAUREFS.ASC) followed by the author(s) (MTAUAUTH), the date (MTAUDATE), the title (MTAUTTTL) and the citation (MTAUCITE). The structure of the files is a single "S" field followed by an alphanumeric field the same length as the correlative field in table 3. The longest ASCII string in each of these four files is six characters longer than the correlative field shown under "Field type" in table 3. The eight comma- and quote-delimited ASCII files contain data only. The user must provide field names or column identifiers acceptable to the database or spreadsheet being used. The field names listed in the tables below are for purposes of reference only they won't be accepted by some programs (e.g., among IBM-compatible personal computer programs, dBase III will not accept spaces in a field ID, Reflex won't accept a hyphen (minus sign), etc.). The files contain location information as latitude and longitude in both degrees-minutes-seconds (DMS) and decimal degrees (DD) formats. In some cases, the two may not agree exactly. Some locations were determined using a digitizer, and the digitizing program used reported the results as degrees, minutes, and seconds with the seconds specified to three decimal places. The DD data were calculated from the DMS data before the DMS data were rounded to the nearest second for inclusion in the table, so differences between the DMS and DD values may be as large as 0.5 seconds (0.0002 degrees). This only represents, at most, about 15 meters on the ground, but where the two numbers disagree, the DD value is in all cases more accurate. Table 1. Structure of MT-AU ASC. Field Field name Field type1 and Field contents number width 1 Map No. S Map number 2 Site name A61 Primary site name 3 Dist-area A35 Mining district or area 4 County A15 County A 5 Prime quad. A24 Topographic quadrangle or other map used to determine latitude and longitude 6 Scale N "Prime quad." scale 7 Commodities A29 Commodities present (see text for explanation) 8 Size S Deposit size category code (1= smallest, 4= largest see text for size categories) 9 Hr. lith. A58 Host rock lithology 10 Age hr. A17 Host rock age 11 Age miner. A14 Age of hypogene mineralization 12 As. ig. lith. A58 Associated igneous rocks (if any) 13 Age as. ig. A17 Age of associated igneous rocks 14 Latitude N Latitude (decimal degrees) 15 Longitude N Longitude (decimal degrees) 16 LatD S Latitude degrees 17 LatM S Latitude minutes 18 LatS S Latitude seconds 19 LonD S Longitude degrees 20 LonM S Longitude minutes 21 LonS S Longitude seconds 22 Ref. I3 S Source of data 1 23 Ref. 2 S Source of data 2 24 Ref. 3 S Source of data 3 25 Ref. 4 S Source of data 4 26 Ref. 5 S Source of data 5 27 Synonym 1 A54 28 Synonym 2 A36 Synonyms 1 through 7. These are either 29 Synonym 3 A39 true synonyms or names of mines whose 30 Synonym 4 A35 production is lumped with that of the mine 31 Synonym 5 A26 listed under "Site name." 32 Synonym 6 A8 33 Synonym 7 A14 1.