File:Microdiamondiferous ultrapotassic minette (Akluilâk Dike System, Paleoproterozoic, 1.832 Ga; Gibson Lake area, Central Churchill Province, northern Canada) 2.jpg
![File:Microdiamondiferous ultrapotassic minette (Akluilâk Dike System, Paleoproterozoic, 1.832 Ga; Gibson Lake area, Central Churchill Province, northern Canada) 2.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/4/45/Microdiamondiferous_ultrapotassic_minette_%28Akluil%C3%A2k_Dike_System%2C_Paleoproterozoic%2C_1.832_Ga%3B_Gibson_Lake_area%2C_Central_Churchill_Province%2C_northern_Canada%29_2.jpg/800px-thumbnail.jpg?20201102170250)
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Captions
Captions
What the heck type of rock iS this??
Summary
[edit]DescriptionMicrodiamondiferous ultrapotassic minette (Akluilâk Dike System, Paleoproterozoic, 1.832 Ga; Gibson Lake area, Central Churchill Province, northern Canada) 2.jpg |
English: Minette from the Precambrian of Canada. (4.2 centimeters across at its widest)
This is an ultrapotassic minette, a rare intrusive igneous rock. Minettes are potassic mica lamprophyres. The dark crystals are biotite mica. The light-colored crystals are orthoclase feldspar. This particular minette is microdiamondiferous, and comes from the Akluilâk Dike System of the Central Churchill Province, northern Canada. The Akluilâk Dikes were intruded during the late Paleoproterozoic, at about 1.832 billion years ago. Microdiamonds found in these rocks are ~2 billion years old. Locality: Gibson Lake area, Gibson-MacQuoid Lake Belt, ~120 km northwest of Rankin Inlet, District of Keewatin, Northwest Territories (sensu lato) (“Nunavut”), northern Canada (approximately 63º 35’ North latitude, 93º 30’ West longitude) See MacRae et al. (1996) for more info.: MacRae, N.D., A.E. Armitage, A.R. Miller, J.C. Roddick, A.L. Jones & M.P. Mudry. 1996. The diamondiferous Akluilâk lamprophyre dyke, Gison Lake area, N.W.T. in Searching for diamonds in Canada. Geological Survey of Canada Open File 3228: 101-107. |
Date | |
Source | https://www.flickr.com/photos/47445767@N05/49945482657/ |
Author | James St. John |
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/49945482657. It was reviewed on 2 November 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
2 November 2020
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 17:02, 2 November 2020 | ![]() | 2,412 × 1,793 (3.83 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/49945482657/ with UploadWizard |
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Camera manufacturer | Canon |
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Camera model | Canon PowerShot D10 |
Exposure time | 1/60 sec (0.016666666666667) |
F-number | f/10 |
ISO speed rating | 80 |
Date and time of data generation | 15:32, 27 May 2020 |
Lens focal length | 9.681 mm |
Width | 4,000 px |
Height | 3,000 px |
Bits per component |
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Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
Software used | Adobe Photoshop Elements 16.0 (Macintosh) |
File change date and time | 10:04, 28 May 2020 |
Exif version | 2.21 |
Date and time of digitizing | 15:32, 27 May 2020 |
Meaning of each component |
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Image compression mode | 3 |
APEX shutter speed | 5.90625 |
APEX aperture | 6.65625 |
APEX exposure bias | −0.66666666666667 |
Maximum land aperture | 3.625 APEX (f/3.51) |
Metering mode | Pattern |
Flash | Flash fired, compulsory flash firing, red-eye reduction mode |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 16,460.904761905 |
Focal plane Y resolution | 16,483.517241379 |
Focal plane resolution unit | inches |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Custom image processing | Normal process |
Exposure mode | Manual exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Scene capture type | Standard |
Lens used | 6.2-18.6mm |
Date metadata was last modified | 06:04, 28 May 2020 |
Unique ID of original document | 9548DA0A04089EC9EF8A7490006D8266 |
IIM version | 2 |