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Uwe Kolitsch's Photo Gallery

Claude Guillemin in the field in Congo

Claude Guillemin while collecting dioptase at Renéville.
Photo from http://www.annales.org/archives/x/guillemin.html, (c) Ecole des mines de Paris
Copyright: © Ecole des mines de Paris      Photo ID: 895624     Uploaded by: Uwe Kolitsch   View Count: 16   Approval status: User gallery    Type: Photo - 451 x 464 pixels (0.2 Mpix)

V4V-2J4Slag (Var: Bodeachat)

Ober river, Elend, Oberharz am Brocken, Harz, Saxony-Anhalt, Germany

Bluish slag ("Bodeachat") from the river Bode near Elend/Mandelholz.
(From Wikipedia.)
Copyright: © Hannes Grobe      Photo ID: 890900     Uploaded by: Uwe Kolitsch   View Count: 16   Approval status: Public galleries    Type: Photo - 1870 x 1596 pixels (3.0 Mpix)

Arenal Volcano viewed from the Arenal Observatory Lodge

Arenal Volcano, Alajuela Province, Costa Rica

The Arenal Volcano viewed from the Arenal Observatory Lodge. Lake Arenal is visible on the left.
(From Wikipedia.)
Copyright: © Christophe Meneboeuf      Photo ID: 890616     Uploaded by: Uwe Kolitsch   View Count: 6   Approval status: Public galleries    Type: Photo - 3165 x 960 pixels (3.0 Mpix)

Fumarole activity in the crater

Poás Volcano, Alajuela Province, Costa Rica

Fumarole activity in the crater.
(From Wikipedia.)
Copyright: © Mario Roberto Duran Ortiz      Photo ID: 890614     Uploaded by: Uwe Kolitsch   View Count: 4   Approval status: Public galleries    Type: Photo - 4662 x 1600 pixels (7.5 Mpix)

View of the crater

Poás Volcano, Alajuela Province, Costa Rica

View of the crater before the 2017 eruption.
(From Wikipedia.)
Copyright: © Peter Andersen      Photo ID: 890610     Uploaded by: Uwe Kolitsch   View Count: 8   Approval status: Public galleries    Type: Photo - 2592 x 1944 pixels (5.0 Mpix)

2KJ-FG8Hematite : Fe2O3, Djurleite : Cu31S16, Epidote : {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH), Calcite : CaCO3, Quartz : SiO2

Multiple photos available
Semmering basis tunnel, Gloggnitz, Industrieviertel, Lower Austria, Austria

SEM micrograph (BSE mode) of a polished section: relic hematite (bright grey), djurleite (bright), epidote (grey, slightly zoned), calcite (dark grey) and quartz (dark).
Sample from the "djurleite paragenesis."

Copyright: © Uwe Kolitsch      Photo ID: 886174     Uploaded by: Uwe Kolitsch   View Count: 19   Approval status: Public galleries    Type: Photo - 5120 x 3840 pixels (19.7 Mpix)

C7G-T61Baryte : BaSO4, Djurleite : Cu31S16, Calcite : CaCO3, Clinochlore : Mg5Al(AlSi3O10)(OH)8, Quartz : SiO2

Multiple photos available
Semmering basis tunnel, Gloggnitz, Industrieviertel, Lower Austria, Austria

SEM micrograph (BSE mode) of a polished section: baryte (bright), djurleite (bit darker), in calcite (dark grey); on the left clinochlore (dark grey); and quartz (dark).
Sample from the "djurleite paragenesis."

Copyright: © Uwe Kolitsch      Photo ID: 886172     Uploaded by: Uwe Kolitsch   View Count: 6   Approval status: Public galleries    Type: Photo - 5120 x 3840 pixels (19.7 Mpix)

LVF-4VTBaryte : BaSO4, Calcite : CaCO3, Quartz : SiO2

Multiple photos available
Semmering basis tunnel, Gloggnitz, Industrieviertel, Lower Austria, Austria

SEM micrograph (BSE mode) of a polished section: baryte (white), calcite (grey), quartz (dark grey).
Sample from the "djurleite paragenesis."

Copyright: © Uwe Kolitsch      Photo ID: 886170     Uploaded by: Uwe Kolitsch   View Count: 5   Approval status: Public galleries    Type: Photo - 5120 x 3840 pixels (19.7 Mpix)

WHD-GKKMalachite : Cu2(CO3)(OH)2, Calcite : CaCO3, Epidote : {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH), Djurleite : Cu31S16, Quartz : SiO2

Semmering basis tunnel, Gloggnitz, Industrieviertel, Lower Austria, Austria

SEM micrograph (BSE mode) of a polished section: malachite (bright grey) in calcite (dark grey), with epidote grains (a bit brighter grey, slightly zoned), djurleite (bright) and quartz (dark).
Sample from the "djurleite paragenesis."
Copyright: © Uwe Kolitsch      Photo ID: 886169     Uploaded by: Uwe Kolitsch   View Count: 9   Approval status: Public galleries    Type: Photo - 5120 x 3840 pixels (19.7 Mpix)

FT9-60PMalachite : Cu2(CO3)(OH)2, Djurleite : Cu31S16, Calcite : CaCO3, Quartz : SiO2

Multiple photos available
Semmering basis tunnel, Gloggnitz, Industrieviertel, Lower Austria, Austria

SEM micrograph (BSE mode) of a polished section: malachite (bright grey), djurleite (bright), quartz (dark) and minor calcite (dark grey).
Sample from the "djurleite paragenesis."

Copyright: © Uwe Kolitsch      Photo ID: 886167     Uploaded by: Uwe Kolitsch   View Count: 8   Approval status: Public galleries    Type: Photo - 5120 x 3840 pixels (19.7 Mpix)
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