Erik Jonsson's Photo Gallery
P1P-83HGrootfonteinite Pb3O(CO3)2 , Cerussite PbCO3 , Jacobsite Mn2+Fe3+2O4 , Hausmannite Mn2+Mn3+2O4
Kombat Mine, Kombat, Otavi Constituency, Otjozondjupa Region, NamibiaField of View: 5 mm
Grootfonteinite as aggregates of micaceous, highly lustrous subhedral, colourless to grey-white crystals intergrown with cerussite and associated with Mn-Fe oxides (jacobsite, hausmannite). Kombat mine, probably from the Asis West Sector. Photo: E. Jonsson.
Macro photo from type material, see also:
Siidra, O. I., Jonsson, E., Chukanov, N. V., Nekrasova, D. O., Pekov, I. V., Depmeier, W., Polekhovsky, Y. S. & Yapaskurt, V. O. 2018: Grootfonteinite, Pb3O(CO3)2, a new mineral species from the Kombat Mine, Namibia, merotypically related to hydrocerussite. European Journal of Mineralogy 30, 383-391.
Q98-LWERoquesite CuInS2 , Bornite Cu5FeS4 , Wittichenite Cu3BiS3 , Chalcopyrite CuFeS2 , Bismuth Bi , Digenite Cu9S5 , Covellite CuS
Charrier Mine, Laprugne, Vichy, Allier, Auvergne-RhĂŽne-Alpes, FranceField of View: 0.8 mm
Roquesite as a medium-grey aggregate (central right part of image) in pinkish-brownish bornite associated with fracture and grain-boundary-hosted blue digenite and covellite, yellowish chalcopyrite, subhedral light grey (near white) wittichenite (lower left), minor native bismuth (far right, white) and groundmass silicates (darkest grey). Well studied by optical methods and confirmed by SEM-EDS analysis. Charrier mine (type locality), Allier, France. Photomicrograph in plane-polarised reflected light of polished section.
Photo: Erik Jonsson.
0XX-N52Roymillerite Pb24Mg9(Si10O28)(CO3)10(BO3)(SiO4)(OH)13O5 , Rhodochrosite MnCO3 , Cerussite PbCO3 , Jacobsite Mn2+Fe3+2O4
Kombat Mine, Kombat, Otavi Constituency, Otjozondjupa Region, NamibiaField of View: 1.5 mm
SEM back-scattered electron (BSE) image of platy crystals (note cleavage parallell to elongation) of roymillerite, in a groundmass of rhodochrosite, cerussite with associated jacobsite. Kombat mine, probably Asis West Sector.
Studied section from part of cotype specimen. Photo: Erik Jonsson. See also: Chukanov, N. V., Jonsson, E., Aksenov, S. M., Britvin, S. N., Rastsvetaeva, R. K., Belakovskiy, D. I. & Van, K. V. 2017: Roymillerite, Pb24Mg9(Si9AlO28)(SiO4)(BO3)(CO3)10(OH)14O4, a new mineral: mineralogical characterization and crystal chemistry. Physics and Chemistry of Minerals 44, 685-699. DOI 10.1007/s00269-017-0893-2
View of open pit at GĂ„sgruvan
GĂ„sgruvan Quarry, Persberg ore district, Filipstad, VĂ€rmland County, SwedenView of GĂ„sgruvan open pit,two collectors on the lower left for scale. Photo by Erik Jonsson, September 2014.
Leica M Summicron 35mm, Kodak T-Max b/w film.
L9T-JCYMacedonite PbTiO3 , Hausmannite Mn2+Mn3+2O4 , Calcite CaCO3
LĂ„ngban Mine, LĂ„ngban Ore District, Filipstad, VĂ€rmland County, SwedenEuhedral, cubic crystals of translucent yellow macedonite (centre, and lowermost centre) in translucent calcite, with associated hausmannite (greyish, with deep red internal reflexes).
Photomicrograph in reflected, polarised light, nearly crossed polars.
Scale bar (red, upper left) equals 50 micrometers. Focus was set slightly below the surface of the section (cf. slightly blurred hausmannite), to increase visibility of the crystal morphology.
Macedonite verified by SEM-EDS analysis.
View over part of the upper dumps and the Nya Schaktet (New Shaft) headframe at LĂ„ngban
LĂ„ngban Mine, LĂ„ngban Ore District, Filipstad, VĂ€rmland County, SwedenView over part of the upper dumps and the typically red, wooden Nya Schaktet (New Shaft) headframe at LĂ„ngban. This part of the dump is generally prohibited to collect from, and therefore relatively little touched. The original contours of the conical piles of dolomite-rich material (hence their light colour) are very well-preserved.
Photo by Erik Jonsson in August 2006.
8R9-87HLĂ„ngbanshyttanite Pb2Mn2Mg(AsO4)2(OH)4·6H2O , Antigorite Mg3(Si2O5)(OH)4
LÄngban Mine, LÄngban Ore District, Filipstad, VÀrmland County, SwedenSEM photo showing strongly elongated, platy crystals of lÄngbanshyttanite, with minor manganoan antigorite as groundmass/background.
SEM-secondary electron image (SEI). Scale bar in image equals 10 micrometers.
From the type specimen.