Mineral Information Layer for Oregon-Release 2 (MILO-Release 2) is a geospatial database that stores and manages information regarding Oregon's mineral occurrences, prospects, and mines. Understand that recreation in or around inactive mine sites is extremely dangerous, and can result in serious injury or death. Stay out and stay alive!
MILO-Release 2 is intended for use as reference material supporting local- to statewide-scale mineral resource and environmental assessments.
The predecessor and foundation for MILO-Release 2 is an older database called MILOC (Mineral Information Layer for Oregon by County). DOGAMI published the database in 1993 for the purpose of providing the state with a mineral resource database (Gray, 1993). It was subsequently converted to a GIS format and renamed MILO (i.e. MILO-Release 1). However, DOGAMI did not release the first version of MILO to the public. MILOC was originally published in dBASE III+ format, within which was information for location, commodity, and other data for an estimated 7,899 mineral occurrences, prospects, and mines. MILO-Release 2 now lists 21,101 mineral occurrences, prospects, and mines. These sites are linked to available commodity information, like its precursor, such as metals (elements, metallic, and oxides), industrial minerals (non-metallic minerals and materials, including gemstones), mineral fuel (coal and oil shale), and construction aggregate (sand & gravel and stone). The substantial increase in sites, nearly three-fold, can be attributed partly to data "pulls" from the following sources: 1) A data "pull" off of the U.S. Geological Survey's Mineral Resources Data System (MRDS) and (CRIB) and U.S. Bureau of Mines' Mineral Industry Location Subsystem (MILS) main frame databases resulted in the addition of approximately 700 records not included in MILOCO and subsequent unpublished versions of MILO (i.e. MILO-Release 1). 2) Two unpublished data sets from the Oregon Department of Transportation listing aggregate sources and quality tests revealed that about 2,000 aggregate sources were not listed in MILOCO and subsequent unpublished versions of MILO (i.e. MILO-Release 1). Furthermore, each of Oregon's 1:24,000-scale topographic quadrangle maps was inspected for mining-related marks/symbols, e.g. aggregate site(s) (borrow pits, quarries, and gravel pits) and mine/prospect site(s). This effort added a substantial number of new sites, nearly 9,000 to MILO-Release 2. Although the data for MILO-Release 2 are statewide in extent, coverage varies from county to county. This is because the data collection was contingent upon the above sources with which we have not established ties. The attribute table for MILO-Release 2 may contain some errors, but care has been taken to prevent duplications and omissions within table and between the databases compiled for it, so far as possible. Additionally, mineral-related data are subject to change as new data are obtained, therefore updates to the database are expected. Please be aware that errors are possible because of the aforementioned data retrevial efforts and not least of which are the inherent problems between the databases compiled. However, so far as possible care has been taken to mitigate these issues but the attribute table for MILO-Release 2 may contain errors, duplications, and omissions.
publication date
The Oregon Department of Geology and Mineral Industries makes no warranty as to the currency, completeness, accuracy or utility of any specific data contained herein. This disclaimer applies both to individual use of the data and aggregate use with other data. It is strongly recommended that careful attention be paid to the contents of this metadata file. User should use caution when geospatially overlaying this data set upon other geospatial data set(s) and should not make legally binding decisions from this or other related data analysis. Any person using the information presented here should fully understand the data collection and compilation process before beginning their analysis/use. The burden of determining fitness for use lies with the user. If the user has modified the data in any way, they are obliged to describe the types of modifications they have performed. User specifically agrees not to misrepresent this data set, nor to imply that changes they made were approved by DOGAMI. This coverage cannot serve as a substitute for site-specific investigation(s) by qualified practitioner(s). Site-specific data may give results that differ from the data provide herein. To ensure distribution of the most current public information, please refer requests for data to the DOGAMI. To avoid the risk of misinterpretation, invalid results, and erroneous conclusions, the users must consider the original data source, collection methodology, and any other conditions specific to every data element and each data set as a whole. Potential users are advised to consult with the Department of Geology and Mineral Industries to gain an understanding of the inherent limitations of this data set and its scope of inference. Also, the user must be aware that errors and conditions originating from physical sources and data entry may be reflected in the data, and that the digital processing performed during preparation, storage, and transmission of the data set may have exacerbated such errors and/or introduced additional ones.
E-mail contact preferred
MILO-Release 2 is a large database developed over several decades by DOGAMI's researchers and reporters. Funding for the compilation of MILO-Release 2 is through a grant obtained from the Oregon Department of Transportation (ODOT/Fedral Highway Administration (FHWA) Contract/Grant No. 686 and Interagency Agreement between ODOT and DOGAMI, No. 25296. Acknowledgment of ODOT's funding and DOGAMI would be appreciated in products derived from this compiled data.
Attribute accuracy is tested by manual comparision of the source and hard copy plots. However, for those point that do not have a corresponding mark on a digitial U.S. Geological Survery 1:24,000-scale quadrangle (DRG), the accuracy of this data is dependent on (1) detail level (e.g. location information) of the source material and (2) interpretation procedures for capturing that source. Field checking of the data was not performed.
No duplicated features exist although individual point features may overlap and share the same coorindates but have differences in attribute(s). Because the data were collected and reported by numerous people, the descriptions provided are not highly consistent in structure or terminology or similar characteristics may be described differently.
Attribution of the database is generally sparse, meaning that not all fields are attributed. The spatial data are presented in the form of points representing mines, prospects, and occurrences and the coverage is statewide.
For mines, prospect, and mineral occurrences (including aggregate sources), the positional quality of each varies widely or is entirely unknown especially where their location information was obtained from older published and unpublished sources. For example, in older sources location information is often reported in a narrative format and are accurate within a mile and most to within a quarter mile. Those in newer publications are usually reported by subdivisions of a section of land (Public Land Survey System or PLS) or by latitude and longitude, and consequencely, are probably accurate within a quarter of a mile, and most within an eighth of a mile. The digitizing method for locating the mines, prospects, and mineral occurrences involved heads-up digitization from U.S. Geological Survey Digital Raster (DRG) Image of 1:24,000-scale quadrangles on the computer screen by using a computer mouse to scribe the feature. With that said the following steps were taken to check each point feature's positional accuracy by 1) matching a mark (symbol) on the DRG and 2) inspecting each 2005 Digital Orthophoto Quarter-Quadrangles (DOQQs) for a mine-related distrubance. The accuracy of this data depends on a number of different types of errors: geodetic, machine, cartographic, and random errors. Not least of which depends on the level of detail included in the source material and the interpretation procedures for capturing that source. Nevertheless, the positonal accuracy for many of the sites is much improved, now at least points overlay cooresponding topographic mark. Still accuracy of this data is dependent on the level of detail of the source material and the interpretation procedures for capturing that source, at best this accuracy is no more than 30 to 40 ft.
Vertical accuracy is impacted by the accuracy of the data source and the methods used to locate each mineral occurrence, prospect, and mine.
Agencies that provided data for the original MILOC (and the foundation for this release) include: the Bureau of Land Management (BLM), U.S. Bureau of Mines (USBM), U.S. Forest Service (USFS), U.S. Geological Survey (USGS), Oregon Department of Energy, Oregon Department of Forestry, Oregon Department of Land Conservation and Development, Department of State Lands, Oregon Department of Transportation - Highway Division, and Oregon Department of Water Resources. Also, this data set integrates selected data from DOGAMI's unpublished and published mineral resource reports and maps.
DOGAMI replaced MapInfo Pro's GIS software with GIS software from ERSI. This neccessiated a conversion, in which an earlier version of MILO-Release 2 was converted from a MapInfo Pro .tab file format into ERSI's .shp (shapefile) file format using MapInfo's (Version 9.01) Universal Transformer function.
E-mail contact preferred.
Attributes from the Oregon Digital Geologic Compilation (OGDC-Ver 5) were added to MILO using the intersect point tool from the Hawth's Analysis Tools for ArcGIS.
Internal feature number.
ESRI
Feature geometry.
ESRI
All commodies listed in the literature for this site
Oregon Department of Geology and Mineral IndustriesI and various literature sources
Commodity Type
Oregon Department of Geology and Mineral Industries
Oregon Department of Geology and Mineral Industries
Department of Geology and Mineral Industries
Oregon Department of Geology and Mineral Industries
Oregon Department of Geology and Mineral Industries
Commodity Abbreviation
Oregon Department of Geology and Mineral Industries
A unique identifier which references records of information pertaining to an ODOT owned aggregate pit/quarry or private source
Oregon Department of Transportation
A unique identifier which references records of information pertaining to a mineral property
U.S. Geological Survey's Mineral Resources Data System (MRDS) and (CRIB)
The permit or site number from the Oregon Department of Geology and Mineral Industries, Mineral Land Regulation and Reclamation program. This is the unique record number
DOGAMI
Indicates the operating status of the site at time of last modification
Oregon Department of Geology and Mineral Industries
Mineral occurrence (no workings and/or production)
Raw prospect (minor workings but no production)
Developed prospect (workings but no production)
Mine (present or past producer)
The name of the mineral deposit or mining operation
Place name on U.S. Geological Survey quadrangle map or name referenced in various published and unpublished sources
Other names that the site has had over time, or in the case of placers, names of other gravel bars along a river segment for which one location was chosen for the site name
Name referenced in various published and unpublished sources
Name of individual, company, or operator identified with operation
DOGAMI
County in Oregon where the site is found, single county entry
Unknown
Mining District name
Oregon Department of Geology and Mineral Industries and other sources
Physical address or referenced to topogaphic point or feature
Various sources
The letters or single letter that follow the subdivision of township, range, and section system
Public Land Survey System (PLSS)
Section number
Public Land Survey System (PLSS)
1-36
Public Land Survey System
Township number and direction (S)
Public Land Survey System (PLSS)
South
Public Land Survey System
Valid Oregon Township number
Public Land Survey System
Range number and Range character (E-w)
Public Land Survey System (PLSS)
East
Unknown
West
Unknown
Latitude in decimal degree or Y coordinate for center point of each point
ESRI coordinate function
Longitude in decimal degree or X coordinate for center point of each point
ESRI coordinate function
U.S. Geological Survey 1:24,000-scale (24K) topographic map in Oregon where site is located
U.S Geological Survey
U.S. Geological Survey 1:100,000-scale (100K) topographic map in Oregon where the site is located
U.S. Geological Survey
Point of reference in feet. the elevation of the site
Obtained from15 minute digital elevation model
Commodities produced and sold or used
A broad characterization of the magnitude of production at the site
unknown
Production information
Ore material (valuable minerals or mineral material)
General type of deposit or resource present at the site
Type of workings
Description of exploration and/or mine workings
Year the mineral discovery was made
Year that mineral production started
Reference #1
Bibliographic references providing information supporting the database record
Publication Series Information
Page number of reference where site is mentioned or described
Reference #2
Bibliographic references providing information supporting the database record
Publication Series Information
Page number of reference where site is mentioned or described
Reference #3
Bibliographic references providing information supporting the database record
Publication Series Information
Page number of reference where site is mentioned or described
Reference #4
Bibliographic references providing information supporting the database record
Publication Series Information
Page number of reference where site is mentioned or described
Reference #5
Bibliographic references providing information supporting the database record
Publication Series Information
Page number of reference where site is mentioned or described
Reference ID Code- Unique code for each original reference map, expressed as the first 4 letters of the first author's last name, first and middle initials, the year of publication, and occasionally a map identifier
Oregon Department of Geology and Mineral Industries
Map Unit Label- Reference map unit label symbol taken from the original reference map
Oregon Department of Geology and Mineral Industries
Map Unit Name- Reference map unit name taken from the map legend or explanation of map units on the original reference map
Oregon Department of Geology and Mineral Industries
Geologic Merge Unit Label- Label (period delimited) assigned by area geologists that combines all the original map units into 7 different general geologic categories
Oregon Department of Geology and Mineral Industries
Geology General Unit- General geologic rock type of the geologic merge unit label, expressed by the genesis of the unit
Oregon Department of Geology and Mineral Industries
Age Name- Age of geologic merge unit based on the Geologic Time Scale
Oregon Department of Geology and Mineral Industries
Terrane or Group Name- Stratigraphic name (formally or informally named) for the terrane or group
Oregon Department of Geology and Mineral Industries
Formation Name- Stratigraphic name (formally or informally named) for the geologic formation
Oregon Department of Geology and Mineral Industries
Member Name- Stratigraphic name (formally or informally named) for the member type
Oregon Department of Geology and Mineral Industries
Unit Name- Stratigraphic name (formally or informally named) for the unit type
Oregon Department of Geology and Mineral Industries
Geology Rock Type- Characteristic lithology type name for the geologic merge unit label
Oregon Department of Geology and Mineral Industries
ArcGIS Join Key- Concatenation of 'Ref_ID_cod' and 'Map_unit_l' fields without a space in between - for use with joins or relates of data tables in ArcGIS or other GIS software
Oregon Department of Geology and Mineral Industries
The MILO_Release2.dbf attribute table contains all the attributes and values needed to display graphically the shapefile data layer. The items in MILO_Release2.dbf are listed, defined, and described in the section above but not all fields are populated and left blank.
800 NE Oregon Street, Suite 965 #28
Contact the Nature of the Northwest Information Center by e-mail, phone, or letter if a CDROM is needed.
No warranty, expressed or implied is made regarding the accuracy or utility of the data described and/or contained herein, nor shall the act of distribution constitute any such warranty regarding the utility of the data on any computer system or GIS computer program. This disclaimer applies both to individual use of the data and aggregate use with other data. It is strongly recommended that careful attention be paid to the contents of the metadata file associated with these data. The Oregon Department of Geology and Mineral Industries shall not be held liable for improper or incorrect use of these data. This information may be updated without notification.
Contact The Nature of the Northwest Information Center by e-mail, phone, or letter for CDROM order.
Contact The Nature of the Northwest Information Center by e-mail, phone, or letter explaining what products are needed.
800 NE Oregon Street, Suite 965 #28
E-mail contact preferred