File:Nephrite jade (Pounamu Ultramafics, Pounamu Ultramafic Belt, South Island, New Zealand) 3 (24069093093).jpg
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Summary
editDescriptionNephrite jade (Pounamu Ultramafics, Pounamu Ultramafic Belt, South Island, New Zealand) 3 (24069093093).jpg |
Nephrite jade from New Zealand. (public display, Montana Bureau of Mines and Geology Mineral Museum, Butte, Montana, USA) Nephrite jade (nephritite) is a crystalline-textured to felted-textured metamorphic rock principally composed of one or more amphibole minerals (tremolite to actinolite, Ca2Mg5Si8O22(OH)2 to Ca2(Mg,Fe)5Si8O22(OH)2). The gorgeous slice of green nephrite jade shown above is from New Zealand's South Island. New Zealand jade has long been collected as fluvial/alluvial clasts that were eroded from a segmented ophiolite called the Pounamu Ultramafic Belt. Ophiolites are fragments of oceanic lithosphere (basaltic crust + uppermost mantle) that have been metamorphosed and plastered onto the edges of continental lithospheric plates by obduction (the opposite of subduction). Pounamu nephrite jade has been interpreted as altered (tectonized) tremolite-rich rocks. Geologic unit: Pounamu Ultramafics Locality: unrecorded/undisclosed locality in the South Island of New Zealand (but very likely a fluvial or alluvial boulder ultimately derived from the the Pounamu Ultramafic Belt) |
Date | |
Source | Nephrite jade (Pounamu Ultramafics, Pounamu Ultramafic Belt, South Island, New Zealand) 3 |
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@N05/24069093093 (archive). It was reviewed on 30 November 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
30 November 2019
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current | 16:50, 30 November 2019 | 3,804 × 2,996 (3.13 MB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via #flickr2commons |
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Camera manufacturer | Canon |
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Camera model | Canon PowerShot D10 |
Exposure time | 1/1 sec (1) |
F-number | f/4.9 |
ISO speed rating | 80 |
Date and time of data generation | 12:06, 14 August 2011 |
Lens focal length | 18.6 mm |
Orientation | Normal |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
Software used | Adobe Photoshop CS2 Macintosh |
File change date and time | 17:13, 29 January 2016 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 12:06, 14 August 2011 |
Meaning of each component |
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Image compression mode | 3 |
APEX shutter speed | 0 |
APEX aperture | 4.59375 |
APEX exposure bias | 0 |
Maximum land aperture | 4.59375 APEX (f/4.91) |
Metering mode | Pattern |
Flash | Flash did not fire, compulsory flash suppression |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 16,460.905349794 |
Focal plane Y resolution | 16,483.516483516 |
Focal plane resolution unit | inches |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Scene capture type | Landscape |
Supported Flashpix version | 1 |
Image width | 3,804 px |
Image height | 2,996 px |
Date metadata was last modified | 12:13, 29 January 2016 |
IIM version | 2 |