File:Native silver-bearing hydrothermal vein (mine near Joachimsthal, Bohemia) 1.jpg
![File:Native silver-bearing hydrothermal vein (mine near Joachimsthal, Bohemia) 1.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/d/dc/Native_silver-bearing_hydrothermal_vein_%28mine_near_Joachimsthal%2C_Bohemia%29_1.jpg/800px-Native_silver-bearing_hydrothermal_vein_%28mine_near_Joachimsthal%2C_Bohemia%29_1.jpg?20210426144247)
Original file (3,564 × 2,509 pixels, file size: 6.75 MB, MIME type: image/jpeg)
Captions
Captions
Summary
[edit]DescriptionNative silver-bearing hydrothermal vein (mine near Joachimsthal, Bohemia) 1.jpg |
English: Tarnished native silver wires in hydrothermal vein rock from Bohemia.
The town of Joachimsthal in Bohemia became rich and famous starting in the early 1500s from the discovery of silver-bearing veins in the surrounding hills. A silver mining boom followed - the silver was used to make coins named after the town - Joachimsthalers, or "thalers" for short (see: www.flickr.com/photos/vitenskapsmuseet/19962171845 ). This is the origin of the word "dollar". The Joachimsthal area has a complex mix of metamorphic and igneous rocks. The most productive set of veins is oriented ~north-south. Other veins sets in the area are oriented east-west and northwest-southeast. A few are oriented northeast-southwest. Vein mineralization occurred in multiple phases over long periods of geologic time. The most important phase was the so-called five-element mineralization, which involved the crystallization of silver, bismuth, cobalt, nickel, and arsenic minerals (plus uranium minerals). This five-element mineralization has occurred elsewhere, for example the Great Bear Lake area (Northwest Territories, Canada); the Cobalt, Ontario area; the Zimmer Lake area (Saskatchewan, Canada); and the Karuizawa Mine area (Japan). In this sample, native silver occurs as clumps of tarnished, twisted wires. The age(s) of polymetallic mineralization in the Joachimsthal area is not well constrained, but apparently occurred at Cretaceous-Tertiary boundary times. Locality: unrecorded/undisclosed mine near the town of Joachimsthal (Jáchymov; Jachymov), Bohemia, northwestern Czech Republic Geologic info. mostly synthesized from: Ondrus et al. (2003) - Geology and hydrothermal vein system of the Jáchymov (Joachimsthal) ore district. Journal of the Czech Geological Society 48: 3-18. |
Date | |
Source | https://www.flickr.com/photos/47445767@N05/51134113544/ |
Author | James St. John |
Licensing
[edit]![w:en:Creative Commons](https://upload.wikimedia.org/wikipedia/commons/thumb/7/79/CC_some_rights_reserved.svg/90px-CC_some_rights_reserved.svg.png)
![attribution](https://upload.wikimedia.org/wikipedia/commons/thumb/1/11/Cc-by_new_white.svg/24px-Cc-by_new_white.svg.png)
- 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@N05/51134113544. It was reviewed on 26 April 2021 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
26 April 2021
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 14:42, 26 April 2021 | ![]() | 3,564 × 2,509 (6.75 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/51134113544/ with UploadWizard |
You cannot overwrite this file.
File usage on Commons
There are no pages that use this file.
Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Camera manufacturer | Canon |
---|---|
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 | 17:10, 12 April 2021 |
Lens focal length | 9.681 mm |
Width | 4,000 px |
Height | 3,000 px |
Bits per component |
|
Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
Software used | Adobe Photoshop Elements 18.0 (Macintosh) |
File change date and time | 18:49, 22 April 2021 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 17:10, 12 April 2021 |
Meaning of each component |
|
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 | 16,460.905349794 |
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 | Manual exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Scene capture type | Standard |
Lens used | 6.2-18.6 mm |
Date metadata was last modified | 14:49, 22 April 2021 |
Unique ID of original document | 5F5BE8EF97F9AE53C3B714663EDACE5A |
IIM version | 24,576 |