File:Purple jade (metaphonolite) Bursa Province, northwestern Turkey.jpg
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[edit]DescriptionPurple jade (metaphonolite) Bursa Province, northwestern Turkey.jpg |
Purple jade (= finely-crystalline jadeite-K-feldspar-lawsonite-aegerine metamorphite) (10.2 cm across at its widest) - blueschist facies metaphonolite from Bursa Province (probably near Akpinar in southern Bursa Province), northwestern Turkey. Purple or lavender-colored jade is very rare. Such rocks are known from Burma, Turkey, and parts of Central America. Purple jade from Turkey is a polymineralic metamorphic rock with a complex origin. Published research indicates that this material was originally Paleozoic- or Mesozoic-aged phonolite lava, an alkaline, intermediate, extrusive igneous rock. During the Late Cretaceous, at about 80 Ma, blueschist facies metamorphism (= high-pressure, low-temperature) altered the phonolites into rocks dominated by jadeite pyroxene, potassium feldspar, lawsonite, and aegerine pyroxene, with minor monazite, phengite, and secondary sericite. During the Cenozoic, tectonic uplift, surficial exposure, and paleoerosion of these blueschist-facies rocks resulted in them being incorporated in landslide deposits (debris flow breccias). Turkish purple jade is collected as loose paleoclasts eroded from these Middle Miocene debris flow breccias. |
Date | |
Source | Purple jade (metaphonolite) (Paleozoic or Mesozoic protolith; Late Cretaceous metamorphism, 80 Ma; paleoclast in Middle Miocene debris flow breccia; Bursa Province, northwestern Turkey) |
Author | James St. John |
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This image was originally posted to Flickr by jsj1771 at https://www.flickr.com/photos/47445767@N05/14915985567. It was reviewed on 1 September 2014 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0. |
1 September 2014
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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/11 |
ISO speed rating | 80 |
Date and time of data generation | 15:03, 7 May 2012 |
Lens focal length | 11.614 mm |
Orientation | Normal |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
Software used | Adobe Photoshop CS2 Macintosh |
File change date and time | 02:22, 1 September 2014 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 15:03, 7 May 2012 |
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APEX shutter speed | 5.90625 |
APEX aperture | 6.90625 |
APEX exposure bias | −0.33333333333333 |
Maximum land aperture | 4 APEX (f/4) |
Metering mode | Pattern |
Flash | Flash fired, compulsory flash firing, red-eye reduction mode |
Supported Flashpix version | 1 |
Color space | sRGB |
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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 |
Supported Flashpix version | 1 |
Image width | 3,824 px |
Image height | 2,756 px |
Date metadata was last modified | 22:22, 31 August 2014 |
IIM version | 2 |