Pardee, J T (1922): Description of manganese nodules collected in a metamorphic limestone Cambrian formation near Philipsburg, Montana [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.855762, Supplement to: Pardee, JT (1922): Deposits of manganese ore in Montana, Utah, Oregon, and Washington. Contributions to economic geology, 1921, Part I, Metals and nonmetals except fuels, US Geological Survey Bulletin, 725C, 141-243, https://pubs.usgs.gov/bul/0725c/report.pdf
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Abstract:
In the Philipsburg district, in western Montana a low arch of a Paleozoic limestones has been cut and deformed on the east and a south sides by a small batholith of Tertiary granodiorite. The manganese deposits are confined to an area of about 2 square miles underlain by sedimentary rocks and adjacent to the granodiorite body. The ore, chiefly pyrolusite, was apparently derived from rhodochrosite that was abundant in the veins and had replaced the adjacent limestones. The oxide ore is found chiefly within 600 feet of the surface, though one small body was mined at a depth of 700 feet. Commonly these bodies are aggregates of nodules or spheroids that range in size from that of an egg to that of a coconut or larger. In some places they show an irregular texture somewhat like that of a sponge, and in others the material composing them is loose and friable and apparently structureless. Psilomelane is the principal constituent of many of the nodules, in which it forms layers that alternate with softer oxides.
Source:
Grant, John Bruce; Moore, Carla J; Alameddin, George; Chen, Kuiying; Barton, Mark (1992): The NOAA and MMS Marine Minerals Geochemical Database. National Geophysical Data Center, NOAA, https://doi.org/10.7289/V52Z13FT
Further details:
Warnken, Robin R; Virden, William T; Moore, Carla J (1992): The NOAA and MMS Marine Minerals Bibliography. National Geophysical Data Center, NOAA, https://doi.org/10.7289/V53X84KN
Project(s):
Coverage:
Median Latitude: 46.340758 * Median Longitude: -113.270479 * South-bound Latitude: 46.335225 * West-bound Longitude: -113.270588 * North-bound Latitude: 46.346290 * East-bound Longitude: -113.270369
Minimum DEPTH, sediment/rock: -150.0 m * Maximum DEPTH, sediment/rock: -42.5 m
Event(s):
Comment:
From 1983 until 1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions. At the time it was the most extended data compilation on ferromanganese deposits world wide. Initially published in a proprietary format incompatible with present day standards it was jointly decided by AWI and NOAA to transcribe this legacy data into PANGAEA. This transfer is augmented by a careful checking of the original sources when available and the encoding of ancillary information (sample description, method of analysis...) not present in the NOAA-MMS database.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Pardee, J T | |||
| 2 | Latitude of event | Latitude | Pardee, J T | |||
| 3 | Longitude of event | Longitude | Pardee, J T | |||
| 4 | Elevation of event | Elevation | m | Pardee, J T | ||
| 5 | Sample ID | Sample ID | Pardee, J T | |||
| 6 | DEPTH, sediment/rock | Depth sed | m | Pardee, J T | Geocode | |
| 7 | Depth, top/min | Depth top | m | Pardee, J T | ||
| 8 | Depth, bottom/max | Depth bot | m | Pardee, J T | ||
| 9 | Position | Position | Pardee, J T | |||
| 10 | Deposit type | Deposit type | Pardee, J T | |||
| 11 | Quantity of deposit | Quantity | Pardee, J T | |||
| 12 | Size | Size | Pardee, J T | |||
| 13 | Sediment type | Sediment | Pardee, J T | |||
| 14 | Comment | Comment | Pardee, J T | |||
| 15 | Comment | Comment | Pardee, J T | |||
| 16 | Description | Description | Pardee, J T | |||
| 17 | File name | File name | Pardee, J T | |||
| 18 | Uniform resource locator/link to image | URL image | Pardee, J T |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
26 data points