File:Millerite vein (late Paleoproterozoic, 1.85 Ga; 4200 Level of the Strathcona Mine, Sudbury Mining District, Ontario, Canada) 1 (15650886299).jpg
Original file (2,772 × 1,719 pixels, file size: 1.57 MB, MIME type: image/jpeg)
Captions
Captions
Summary edit
_1_(15650886299).jpg&action=edit§ion=1){kind=link}
| Description |
Millerite vein from the Precambrian of Ontario, Canada (4.3 cm across at its widest). The Sudbury Complex (Sudbury Basin) in southeastern Canada has intrigued geologists for decades, and not just due to the tremendous economic value of the area’s mineral deposits. Sudbury is one of the largest preserved impact structures on Earth. The impact occurred ~1.85 billion years ago, during the late Paleoproterozoic. The Sudbury Impact Structure is no longer circular or subcircular in shape, however - it's been compessed into a stretched-egg shape from an ancient continental collision event. This rock is a massive millerite vein. Millerite is NiS (nickel sulfide), a scarce mineral. The typical occurrence of millerite is as long, hair-like needles in some geodes. Massive millerite is rare. In this sample, the millerite is mixed with and rimmed by purplish-bluish bornite, a copper iron sulfide mineral (Cu5FeS4). The whitish-gray is calcite. The greenish material coating the bornite (see shadowed bottom portion of photo) is an alteration zone consisting of epidote and/or actinolite and/or chlorite. Geologic context & mineralization age: Strathcona Ni-Cu Sulfide Deposit, hosted in the lower Sudbury Igneous Complex (= ore-bearing norites & gabbros) and footwall breccia and granitic gneiss, Sudbury Impact Structure, mineralization likely syn-impact or early post-impact, late Paleoproterozoic, 1.85 Ga Locality: 4200 Level of the Strathcona Mine (possibly from the "Deep Copper Zone"), just southwest of Mosquito Lake, ~1 km southeast of the town of Levack, northwest of the city of Sudbury, northwestern Sudbury Mining District, southeastern Ontario, southeastern Canada (46° 38' North, 81° 23' West) |
| Date | |
| Source | Millerite vein (late Paleoproterozoic, 1.85 Ga; 4200 Level of the Strathcona Mine, Sudbury Mining District, Ontario, Canada) 1 |
| Author | James St. John |
Licensing edit
_1_(15650886299).jpg&action=edit§ion=2){kind=link}
- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
|
This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/15650886299 (archive). It was reviewed on 10 October 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 01:12, 10 October 2019 | | 2,772 × 1,719 (1.57 MB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via #flickr2commons |
You cannot overwrite this file.
File usage on Commons
There are no pages that use this file.
_1_(15650886299).jpg&oldid=723139291){kind=link}