Fine needle sulphide intergrowths (black) in a carbonate grain (light colored) and chromediopside (green). Pseudomorph of carbonate on orthopyroxene (enstatite) in garnet websterite (sample M4/01). Xenolite from the Mir kimberlite pipe.
Equipment and technique:
Olympus BX51 optical microscope equipped with Olympus COLOR VIEW III photo-video camera. Transmitted cross-polarized light, active Lazo lens. Image width 0.8 mm.
Laboratory, institution:
Laboratory of High Pressures Minerals Crystallization (Institute of Geology and Mineralogy, Siberian Branch of Russian Academy of Sciences) and Novosibirsk State University.
Crystallographically oriented mineral inclusions (colored) in a garnet grain (dark) from the xenolite of garnet websterite (sample M5/01), kimberlite pipe Mir (Yakutia).
Equipment and technique:
Olympus BX51 optical microscope equipped with Olympus COLOR VIEW III photo-video camera. Transmitted cross-polarized light, active Lazo lens. Image width 0.8 mm.
Laboratory, institution:
Laboratory of High Pressures Minerals Crystallization (Institute of Geology and Mineralogy, Siberian Branch of Russian Academy of Sciences) and Novosibirsk State University.
Charoite from Yakutia, Russia. This silicate forms the bluish layers and veins swirling around the more blocky crystals of feldspar. The rock has a mylonitic fabric and charoite represents the matrix mineral where deformation is preferentially partitioned.
Equipment and technique:
Thin section: rock cut, sliced and thinned down to a regular 30-micron thickness.
Microscope: Zeiss Axioscop 40 Pol
Camera: Zeiss Axiocam MRc5
Photomicrograph under polarized light, crossed polarizers plus two red tint plates (rotated as to reach the preferred colors)
Magnification: 10X
NO IMAGE PROCESSING AFTER SHOOT
Laboratory, institution:
Dipartimento di Geoscienze,
Universita' di Padova.
I captured this fossil in a limestone of unknown provenance from the teaching collection of my Department.
The purpose is purely aesthetic.
Equipment and technique:
Microscope: Zeiss Axioscop 40 Pol
Camera: Zeiss Axiocam MRc5
Photomicrograph under polarized light, crossed polarizers plus two red tint plates (rotated as to reach the preferred colors)
Magnification: 10X lens
NO IMAGE PROCESSING AFTER SHOOT
Laboratory, institution:
Dipartimento di Geoscienze,
Universita' di Padova.
Ocean Jasper from Madagascar. Close-up of two "spherules" in the fine-grained silica matrix, resulting from devitrification of the rhyolitic lava upon cooling.
Equipment and technique:
Microscope: Zeiss Axioscop 40 Pol
Camera: Zeiss Axiocam MRc5
Photomicrograph under transmitted polarized light, crossed polarizers plus two red tint plates (rotated as to reach the preferred colors)
Magnification: 20X
NO IMAGE PROCESSING AFTER SHOOT
Laboratory, institution:
Dipartimento di Geoscienze,
Universita' di Padova.
Cataloguing of the Elba Island mineral collection of the Natural History Museum of Milan, Italy. The photo show a Uranopolycrase group of 8 mm with zircon and xenotime from Fonte del Prete, San Piero in Campo, Campo nell'Elba, Elba Island, Livorno Province, Tuscany, Italy.
Equipment and technique:
Canon EOS 40D with Nikon Bellow and Carl Zeiss Luminar 40 mm lens.
Laboratory, institution:
Natural History Museum of Milan, Italy - Dr. Federico Pezzotta.
Cataloguing of the Elba Island mineral collection of the Natural History Museum of Milan, Italy. The photo show a Beryl crystal of 4.1 mm from La Speranza (Pisani's Quarry), San Piero in Campo, Campo nell'Elba, Elba Island, Livorno Province, Tuscany, Italy.
Equipment and technique:
Canon EOS 40D with Nikon Bellow and Carl Zeiss Luminar 40 mm lens.
Laboratory, institution:
Natural History Museum of Milan, Italy - Dr. Federico Pezzotta.
Cataloguing of the Elba Island mineral collection of the Natural History Museum of Milan, Italy. The photo show an Elbaite multicolor crystal of 7 mm from San Silvestro vein, San Piero in Campo, Campo nell'Elba, Elba Island, Livorno Province, Tuscany, Italy.
Equipment and technique:
Canon EOS 40D with Nikon Bellow and Carl Zeiss Luminar 63 mm lens.
Laboratory, institution:
Natural History Museum of Milan, Italy - Dr. Federico Pezzotta.
Nanoscale inclusions in diamond (sulphide and graphite intergrowths). On the spike of the graphite crystal the melt-fluid inclusion is placed. Some additional inclusions are placed on the right side. Dislocations around inclusions can be clearly seen.
Equipment and technique:
Transmission electron microscope Phillips CM200 (LaB6), 200 kV.
Co-author (if present):
Richard Wirt
Laboratory, institution:
GFZ Potsdam. Department of Experimental Geochemistry.
Sphalerite inclusion with fine chalcopyrite emulsion in form of a scenic mask (gray) in subhedral chalcopyrite intergrowth (yellow) with pyrite (white) and calcite (dark). Ivanovskoye cobalt-copper deposit (South Urals).
Equipment and technique:
Carl Zeiss Axiolab optical microscope, objective 20υ, reflected light. Canon PowerShot A520 digital camera (Auto mode). Edited in Adobe Photoshop (Auto Levels, Unsharp Mask). Image width 0.40 mm.
Copper-cobalt ores from Katanga province (Rep. of the Congo). Cavernous and porous brown iron ore intergrowing with quartz, hydromica, kaolinite and malachite, native copper and cuprite (on the photo).
Micromorphology of palaeosoils of the middle and late Pleistocene
Image:
Short description of the scientific work:
The structure of palaeosoils of the Kamensky soil complex, B horizon (200-250 000 a) reveal an irony secondary phase hosting quartz inclusions and situated within a clay-dust mass. Thus the horizon was formed under sedentary-illuvial processes.
Equipment and technique:
Palaeosoil thin sections. LOMO Mikmed-2 optical microscope equipped with a video camera. DuaMorph Cito 2.0 control software.
Laboratory, institution:
Laboratory of Evolution Geography. Institute of Geography of the Russian Academy of Sciences.
Pecularity of the micromorphology of palaeosoils of the middle and late Pleistocene
Image:
Short description of the scientific work:
Humus soil horizon of the Kamensky soil complex contains humus-clay secondary phases within a humus-dust mass. This is a result of interchange of humus and illuvial processes.
Equipment and technique:
Palaeosoil thin sections. LOMO Mikmed-2 optical microscope equipped with a video camera. DuaMorph Cito 2.0 control software.
Laboratory, institution:
Laboratory of Evolution Geography. Institute of Geography of the Russian Academy of Sciences.
Birefringence of diamond is due to high internal strain within crystals. The highest strain shown on a photo is located between growth sectors having fibrous structure.