File:Mawsitsit (chromian jade) (Namshamaw Deposit, Hpakan-Tawmaw Jade Tract, Late Jurassic, 147 Ma; Maw Sit Sit, near Kansi, western Kachin State, Indo-Burma Range, northern Burma) 5 (17062584510).jpg
Original file (5,840 × 1,929 pixels, file size: 6.44 MB, MIME type: image/jpeg)
This file is from a shared repository and may be used by other projects. The description on its file description page there is shown below.
Summary
DescriptionMawsitsit (chromian jade) (Namshamaw Deposit, Hpakan-Tawmaw Jade Tract, Late Jurassic, 147 Ma; Maw Sit Sit, near Kansi, western Kachin State, Indo-Burma Range, northern Burma) 5 (17062584510).jpg |
Chromian jade (“maw sit sit”) from the Hpakan-Tawmaw Jade Tract (near-latest Jurassic, 147 Ma) of northern Burma. (5.95 cm across at its widest) Bright green = chromojadeite Medium to dark gray veins = albite feldspar Black = amphibole Small blackish chunk at far lower left corner = chromite Dark green extending from far lower left corner = kosmochlor Maw sit sit is a very rare, complex, polymineralic metamorphic rock. Minerals reported in this material include chromite (metallic black, FeCr2O4), kosmochlor pyroxene (emerald green to dark green to black, NaCrSi2O6), chromian jadeite pyroxene (a.k.a. chromojadeite) (green, Na(Al,Fe,Cr)Si2O6), chromiferous arfvedsonite amphibole (green or gray or black, Cr-bearing NaNa2Fe5Si8O22(OH)2), and symplectite (green, a finely-crystalline mineral mix of mostly chromian jadeite). Reported matrix minerals include thompsonite zeolite, albite feldspar, and serpentine. Maw sit sit formed under high pressure and low temperature conditions at the rim of serpentinized, chromiferous mantle peridotites. The peridotites were emplaced by obduction as oceanic lithosphere was subducting beneath the Burmese portion of southeastern Asia during the Mesozoic. Geologic unit: northeastern end of the Hpakan-Tawmaw Jade Tract, Hpakan Ultramafic Body, Naga-Adaman Ophiolite Age: Syngenetic zircons indicate that Burmese jades formed at 147 Ma (late Tithonian Stage, near-latest Jurassic. The metamorphic age of the serpentinite host rocks is 163 Ma (Middle Jurassic). Older literature interprets Burmese jadeitite as Tertiary in age, hosted by Late Creatceous to Eocene serpentinized peridotites. Locality: Namshamaw Deposit ("Namshamaw Dike"; “Maw Sit Sit Vein") at Maw Sit Sit, just northwest of Namshamaw, near Kansi (Kanzi), western Kachin State, Indo-Burma Range, northern Burma References on maw sit sit: Colombo, F., C. Rinaudo & C. Trossarelli. 2000. The mineralogical composition of maw-sit-sit from Myanmar. Journal of Gemmology 27(2): 87-92. Harlow, G.E. & E.P. Olds. 1987. Observations on terrestrial ureyite and ureyitic pyroxene. American Mineralogist 72: 126-136. Shi Guang-Hai, Jiang Neng, Liu Yan, Wang Xia, Zhang Zhi-Yu & Xu Yong-Jing. 2009. Zircon Hf isotope signature of the depleted mantle in the Myanmar jadeitite: implications for Mesozoic intra-oceanic subduction between the Eastern Indian Plate and the Burmese Platelet. Lithos 112: 342-350. Shi G.H., B. Stockhert & Cui W.Y. 2005. Kosmochlor and chromian jadeite aggregates from teh Myanmar jadeitite area. Mineralogical Magazine 69: 1059-1075. Yang Chiu Mei Ou. 1984. A terrestrial source of ureyite. American Mineralogist 69: 1180-1183. |
Date | |
Source | Mawsitsit (chromian jade) (Namshamaw Deposit, Hpakan-Tawmaw Jade Tract, Late Jurassic, 147 Ma; Maw Sit Sit, near Kansi, western Kachin State, Indo-Burma Range, northern Burma) 5 |
Author | James St. John |
Licensing
- 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 jsj1771 at https://www.flickr.com/photos/47445767@N05/17062584510. It was reviewed on 6 May 2015 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0. |
6 May 2015
Items portrayed in this file
depicts
some value
23 April 2015
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 19:31, 6 May 2015 | 5,840 × 1,929 (6.44 MB) | commons>Natuur12 | Transferred from Flickr via Flickr2Commons |
File usage
There are no pages that use this file.
Metadata
This file contains additional information, probably added from the digital camera or scanner used to create or digitize it.
If the file has been modified from its original state, some details may not fully reflect the modified file.
Orientation | Normal |
---|---|
Horizontal resolution | 2,400 dpi |
Vertical resolution | 2,400 dpi |
Software used | Adobe Photoshop CS2 Macintosh |
File change date and time | 20:48, 23 April 2015 |
Color space | Uncalibrated |
Image width | 5,840 px |
Image height | 1,929 px |
Date and time of digitizing | 15:23, 23 April 2015 |
Date metadata was last modified | 16:48, 23 April 2015 |
IIM version | 2 |