Cacheuta Mine, Cerro de Cacheuta, Sierra de Cacheuta, Cacheuta District, Luján de Cuyo department, Mendoza Province, Argentina

New insights into the fine-grained, opaque selenide veinlets of the Sierra de Cacheuta, Mendoza Province, Argentina. Photo 25, please compare Photo 4. Single and twinned euhedral grains and radially grown crystal aggregates of ferroselite (bright cream) grown inside a host-rock fragment, consisting mainly of K Feldspar. Next to them (upper left) ...

© Günter Grundmann, Detmold

New insights into the fine-grained, opaque selenide veinlets of the Sierra de Cacheuta, Mendoza Province, Argentina. Photo 4. Single and twinned euhedral grains and radially grown crystal aggregates of ferroselite (bright cream) grown inside a host rock fragment. Next to them (upper right) are titanomagnetite pseudomorphs. Polished section, plane ...

© Günter Grundmann, Detmold

New insights into the fine-grained, opaque selenide veinlets of the Sierra de Cacheuta, Mendoza Province, Argentina. Photo 6. Goethite (g) pseudomorph after ankerite (?) cemented by acicular malachite (m) embedded in clausthalite (cl, white). Polished section, reflected light image, width 1 mm, plane polarized light. Günter Grundmann photo, ...

© Günter Grundmann, Detmold

Black klockmannite with white reflections off minute cleavages with minor light blue-green chalcomenite and an unidentified green mineral.

© Van King

New insights into the fine-grained, opaque selenide veinlets of the Sierra de Cacheuta, Mendoza Province, Argentina. Photo 3. Detail from photo 2 showing yellowish or brownish pseudomorphs consisting of a framework of oriented leucoxene lamellae originating in response to the alteration of titanomagnetite containing oriented ilmenite laths. ...

© Günter Grundmann, Detmold

New insights into the fine-grained, opaque selenide veinlets of the Sierra de Cacheuta, Mendoza Province, Argentina. Photo 2, please compare Photo 1, and Photo 10. Detail of a trachyte host rock fragment within a strongly foliated selenide veinlet, see photo 1. Interstices and heavily altered phenocrysts are filled with greenish or bluish ...

© Günter Grundmann, Detmold

New insights into the fine-grained, opaque selenide veinlets of the Sierra de Cacheuta, Mendoza Province, Argentina. Photo 1, please compare Photo 10, and Photo 22. Dispersed-light dark field image of Se-vein Type-4 (2.2-cm-thick, 6.6-cm-wide, embedded in resin, surface rolling grinded, with 1.200 mesh SiC abrasive), with layers and lenses of ...

© Günter Grundmann, Detmold

New insights into the fine-grained, opaque selenide veinlets of the Sierra de Cacheuta, Mendoza Province, Argentina. Photo 20. Detail from Se vein type-4. Dispersed-light dark field image of an acicular aggregate of molybdomenite (colorless transparent) showing internal reflections, partly stained by inclusions of goethite (red-brown,) and ...

© Günter Grundmann, Detmold

Dark gray to black granular achávalite. Obtained about 1986 from Gilbert Gauthier. Specimen was supposedly "type material" but no museum source was indicated. Sample is available for serious scientific study.

© Van King

New insights into the fine-grained, opaque selenide veinlets of the Sierra de Cacheuta, Mendoza Province, Argentina. Photo 8. Dispersed light dark field image of Se-veinlet Type-2 (1-cm-thick, 2.1-cm-wide, embedded in resin, surface rolling grinded, with 1200 mesh SiC abrasive) with eucairite (olive brown) showing a strongly foliated and folded ...

© Günter Grundmann, Detmold

New insights into the fine-grained, opaque selenide veinlets of the Sierra de Cacheuta, Mendoza Province, Argentina. Photo 14. Detail from Se vein Type 3: Replacement relics of krut’aite-(g1) (kr). The original rectangular shapes of the krut’aite crystals are outlined by patchily distributed trogtalite-(g1) (tr) and tyrrellite (g2) (ty). ...

© Günter Grundmann, Detmold

New insights into the fine-grained, opaque selenide veinlets of the Sierra de Cacheuta, Mendoza Province, Argentina. Photo 18. Reflected light digital image (200-μm-wide) of clausthalite (white) partially replaced by end-member Krut’aite (blue), end-member petříčekite (blue-violet), molybdomenite (dark-grey), and native selenium (light ...

© Günter Grundmann, Detmold

New insights into the fine-grained, opaque selenide veinlets of the Sierra de Cacheuta, Mendoza Province, Argentina. Photo 7. Dispersed-light dark field image of Se-veinlet Type-1 (1.7-cm-thick, 2.3-cm-wide, surface rolling grinded, with 1200 mesh SiC abrasive) with eucairite (olive brown) as the main selenide interspersed with irregularly ...

© Günter Grundmann, Detmold

New insights into the fine-grained, opaque selenide veinlets of the Sierra de Cacheuta, Mendoza Province, Argentina. Photo 26. Twinned euhedral grains of ferroselite (bright cream) grown inside a host rock fragment. Polished section, plane polarized reflected light digital image, width 100 μm. Günter Grundmann photo, Frank N. Keutsch ...

© Günter Grundmann, Detmold

New insights into the fine-grained, opaque selenide veinlets of the Sierra de Cacheuta, Mendoza Province, Argentina. Photo 28. Detail from Se-vein Type-3: Subhedral pseudo-hexagonal crystal of tyrrellite (ty) partially replaced by clausthalite (cl) in association with klockmannite (kl). Reflected light digital image, 200-μm-wide, plane ...

© Günter Grundmann, Detmold

New insights into the fine-grained, opaque selenide veinlets of the Sierra de Cacheuta, Mendoza Province, Argentina. Photo 5, please compare Photo 10. Irregular dark-brown patches of bitumen (bit) as fracture fillings cementing the host-rock fragments from the vein wall inwards. The bright grains are pseudomorphs of TiO2 after titanomagnetite. ...

© Günter Grundmann, Detmold

New insights into the fine-grained, opaque selenide veinlets of the Sierra de Cacheuta, Mendoza Province, Argentina. Photo 15. Detail from Se-vein Type-3: Originally cubically shaped and oscillatory grown krut’aite-(g1) crystal traced by thin zones of trogtalite-(g1) (see white arrows). Other replacement and alteration products are ...

© Günter Grundmann, Detmold

New insights into the fine-grained, opaque selenide veinlets of the Sierra de Cacheuta, Mendoza Province, Argentina. Photo 22, please compare photo 1, and photo 10. Dispersed-light dark field image of Se-veinlet Type-4 (second half) from Sierra de Cacheuta (2.2-cm-thick, 6.6-cm-wide, embedded in resin, polished surface). The opaque metallic ...

© Günter Grundmann, Detmold

New insights into the fine-grained, opaque selenide veinlets of the Sierra de Cacheuta, Mendoza Province, Argentina. Photo 24, please compare Photo 16. Detail from Se vein Type-1: Flattening of granularly textured eucairite (green and brown rotation tints) showing a network of extensional fractures outlined by klockmannite (red, white and grey ...

© Günter Grundmann, Detmold

New insights into the fine-grained, opaque selenide veinlets of the Sierra de Cacheuta, Mendoza Province, Argentina. Photo 11. Detail from Se vein Type 1: A granular aggregate of eucairite (eu), klockmannite (kl), and naumannite (nau) is partially replacing a host rock fragment along the grain boundaries of K-feldspar (black) and hematite (he, ...

© Günter Grundmann, Detmold

New insights into the fine-grained, opaque selenide veinlets of the Sierra de Cacheuta, Mendoza Province, Argentina. Photo 13. Detail from Se vein Type 3: Few preserved remnants of former subhedral krut’aite-(g1) crystals (k) project into a cavity (black) of the host rock. The originally rectangular shapes of the krut’aite crystals are ...

© Günter Grundmann, Detmold

New insights into the fine-grained, opaque selenide veinlets of the Sierra de Cacheuta, Mendoza Province, Argentina. Photo 27. Detail from Se-vein Type-3: Subhedral crystals of tyrrellite (ty) crystal partially replaced by clausthalite (cl) in association with krut’aite of end-member composition, eskebornite (es) and unnamed alteration ...

© Günter Grundmann, Detmold

New insights into the fine-grained, opaque selenide veinlets of the Sierra de Cacheuta, Mendoza Province, Argentina. Photo 12. Detail from Se vein Type 1: A granular aggregate of eucairite (eu), klockmannite (kl), and naumannite (n) shows inclusions of clausthalite (cl). Reflected light image, 500-μm-wide, plane polarized light. Günter ...

© Günter Grundmann, Detmold

New insights into the fine-grained, opaque selenide veinlets of the Sierra de Cacheuta, Mendoza Province, Argentina. Photo 21. Eskebornite (light-brown) and clausthalite (bright) largely replaced by unknown CuFe selenites (light-grey to dark-grey) of strongly varying Cu/Fe ratios, from Cu > Fe to Cu = Fe to Cu < Fe, possibly representing ...

© Günter Grundmann, Detmold

New insights into the fine-grained, opaque selenide veinlets of the Sierra de Cacheuta, Mendoza Province, Argentina. Photo 23. Detail from Se vein Type 3: Lens-shaped crystal of hematite (he) is partially replaced by a corona of goethite, in a matrix of fine-grained klockmannite (kl) and clausthalite. Reflected light digital image, 500-μm-wide, ...

© Günter Grundmann, Detmold

New insights into the fine-grained, opaque selenide veinlets of the Sierra de Cacheuta, Mendoza Province, Argentina. Photo 9. Dispersed-light darkfield image of Se-veinlet Type-3 (1.5-cm-thick, 2.5-cm-wide, embedded in resin, surface rolling grinded, with 1200 mesh SiC abrasive) with a strongly foliated and folded mélange of eskebornite (light ...

© Günter Grundmann, Detmold

New insights into the fine-grained, opaque selenide veinlets of the Sierra de Cacheuta, Mendoza Province, Argentina. Photo 19. Reflected light digital image (200-μm-wide) of an unnamed Cu selenide (grey) in association with clausthalite (white). Plane polarized light; un = unnamed Cu selenide, pet = end-member petříčekite. Günter Grundmann ...

© Günter Grundmann, Detmold

Black Achávalite grain Ex Chris Deroo collection Acquired from Rik Dillen at the monthly MKA meeting on 12 November 2021

New insights into the fine-grained, opaque selenide veinlets of the Sierra de Cacheuta, Mendoza Province, Argentina. Photo 10, please compare Photo 1, and Photo 22. Dispersed-light dark field image of Se-veinlet Type-4, detail from photo 1 (2.2-cm-thick, 4-cm-wide, embedded in resin, surface rolling grinded, with 1200 mesh SiC abrasive) with ...

© Günter Grundmann, Detmold

The microstructure of Se mineralization from Cacheuta, Argentina. Cross-section through a foliated selenide veinlet perpendicular to the main foliation, illustrating extremely fine-grained klockmannite (strong pale orange to greyish anisotropy), in association with eskebornite (bluish to brownish anisotropy), chalcopyrite (olive brown to bluish ...

© Günter Grundmann, Detmold

New insights into the fine-grained, opaque selenide veinlets of the Sierra de Cacheuta, Mendoza Province, Argentina. Photo 17. Brittle deformation (d3) caused detachment and fragmentation of fine-grained klockmannite (blue-grey) and clausthalite (bright) perpendicular to the vein selvage and flattening of the selenides. Notably, large portions of ...

© Günter Grundmann, Detmold

The microstructure of Se mineralization from Cacheuta, Argentina. Fine-grained granular aggregate of eucairite (Eca – light brownish grey to greenish grey) in association with klockmannite (Kl – cream to greenish grey to blue pleochroism), naumannite (Nau – bluish grey) and clausthalite (Cth - white). For further explanations see ...

© Günter Grundmann, Detmold.

New insights into the fine-grained, opaque selenide veinlets of the Sierra de Cacheuta, Mendoza Province, Argentina. Photo 16. Detail from Se vein Type-1: Flattening of granularly textured eucairite (eu) showing a network of extensional fractures outlined by klockmannite (kl). Subsequent compression created multiple kinkbands in the klockmannite, ...

© Günter Grundmann, Detmold

The microstructure of Se mineralization from Cacheuta, Argentina. Fine-grained granular aggregate of eskebornite (Ebn – light brown), partially replaced along cracks and cleavage by klockmannite (Kl – cream to greenish grey to blue pleochroism), in association with clausthalite (Cth - white) and subhedral crystals of tyrrellite (Ty – ...

© Günter Grundmann, Detmold.

The microstructure of Se mineralization from Cacheuta, Argentina. Cross-section through a foliated selenide veinlet perpendicular to the main foliation, illustrating extremely fine-grained klockmannite (Kl - bluish greys), in association with umangite (Um - violet), and clausthalite (Cth - off white). Notably, large portions of klockmannite show ...

© Günter Grundmann, Detmold

The microstructure of Se mineralization from Cacheuta, Argentina. Cross-section through a foliated selenide veinlet perpendicular to the main foliation, illustrating extremely fine-grained klockmannite (Kl - bluish greys), in association with umangite (Um - violet), and clausthalite (Cth - off white), eskebornite (Ebn - light brown). Notably, ...

© Günter Grundmann, Detmold

The microstructure of Se mineralization from Cacheuta, Argentina. Cross-section through a foliated selenide veinlet perpendicular to the main foliation, illustrating extremely fine-grained klockmannite (strong pale orange to greyish anisotropy), in association with umangite (strong orange red shades), and clausthalite (isotropic). Notably, large ...

© Günter Grundmann, Detmold

The microstructure of Se mineralization from Cacheuta, Argentina. Cross-section through a foliated selenide veinlet perpendicular to the main foliation, illustrating extremely fine-grained klockmannite (Kl - bluish greys), in association with umangite (Um - violet), and clausthalite (Cth - off white). Notably, large portions of klockmannite show ...

© Günter Grundmann, Detmold

The microstructure of Se mineralization from Cacheuta, Argentina. Cross-section through a foliated selenide veinlet perpendicular to the main foliation, illustrating a rubble breccia with extremely fine-grained klockmannite (Kl - bluish greys), in association with chalcopyrite (Ccp - yellow), chalcocite (Cc – pale blue), minor bornite (Bn – ...

© Günter Grundmann, Detmold

Blue azurite on black klockmannite.

© Van King

The microstructure of Se mineralization from Cacheuta, Argentina. Cross-section through a foliated selenide veinlet perpendicular to the main foliation, illustrating extremely fine-grained klockmannite (Kl - bluish greys), in association with umangite (Um - violet), and clausthalite (Cth - off white). Notably, large portions of klockmannite show ...

© Günter Grundmann, Detmold

The microstructure of Se mineralization from Cacheuta, Argentina. Cross-section through a foliated selenide veinlet perpendicular to the main foliation, illustrating extremely fine-grained klockmannite (Kl - bluish greys), in association with clausthalite (Cth - off white), eskebornite (Ebn - light brown), chalcopyrite (Ccp - yellow), and minor ...

© Günter Grundmann, Detmold

The microstructure of Se mineralization from Cacheuta, Argentina. Fine-grained granular aggregate of eucairite (strong blue, grey to brown anisotropy) in association with klockmannite (strong pale orange to greyish anisotropy), naumannite (weak bluish to brownish grey anisotropy), clausthalite (isotropic), and eskebornite (weak brownish to ...

© Günter Grundmann, Detmold.

The microstructure of Se mineralization from Cacheuta, Argentina. Fine-grained granular aggregate of eucairite (Eca – light brownish grey to greenish grey) in association with klockmannite (Kl – cream to greenish grey to blue pleochroism), naumannite (Nau – bluish grey), clausthalite (Cth - white), and eskebornite (Ebn – light brown). ...

© Günter Grundmann, Detmold.

The microstructure of Se mineralization from Cacheuta, Argentina. Cross-section through a foliated selenide veinlet perpendicular to the main foliation, illustrating extremely fine-grained klockmannite (Kl - bluish greys), in association with eskebornite (Ebn - light brown), chalcopyrite (Ccp - yellow)), clausthalite (Cth - off white), minor ...

© Günter Grundmann, Detmold

The microstructure of Se mineralization from Cacheuta, Argentina. Fine-grained granular aggregate of eskebornite (weak brownish to bluish grey anisotropy), partially replaced along cracks and cleavage by klockmannite (strong pale orange to greyish anisotropy), in association with clausthalite (isotropic). For further explanations see reference: ...

© Günter Grundmann, Detmold.

The microstructure of Se mineralization from Cacheuta, Argentina. Cross-section through a foliated selenide veinlet perpendicular to the main foliation, illustrating extremely fine-grained klockmannite (Kl - bluish greys), in association with minor umangite (Um - violet), clausthalite (Cth - off white), and minor eskebornite (Ebn - light brown). ...

© Günter Grundmann, Detmold

The microstructure of Se mineralization from Cacheuta, Argentina. Cross-section through a foliated selenide veinlet perpendicular to the main foliation, illustrating extremely fine-grained klockmannite (strong pale orange to greyish anisotropy), in association with umangite (strong orange red shades), and very minor clausthalite (isotropic). ...

© Günter Grundmann, Detmold

The microstructure of Se mineralization from Cacheuta, Argentina. Cross-section through a foliated selenide veinlet perpendicular to the main foliation, illustrating extremely fine-grained klockmannite (strong pale orange to greyish anisotropy), in association with eskebornite (bluish to brownish anisotropy), chalcopyrite (olive brown to bluish ...

© Günter Grundmann, Detmold

The microstructure of Se mineralization from Cacheuta, Argentina. Fine-grained granular aggregate of eucairite (strong blue, grey to brown anisotropy) in association with klockmannite (strong pale orange to greyish anisotropy), naumannite (weak bluish to brownish grey anisotropy) and clausthalite (isotropic). For further explanations see ...

© Günter Grundmann, Detmold.

The microstructure of Se mineralization from Cacheuta, Argentina. Fine-grained granular aggregate of eskebornite (weak brownish to bluish grey anisotropy), partially replaced along cracks and cleavage by klockmannite (strong pale orange to greyish anisotropy), in association with clausthalite (isotropic). For further explanations see reference: ...

© Günter Grundmann, Detmold.

The microstructure of Se mineralization from Cacheuta, Argentina. Cross-section through a foliated selenide veinlet perpendicular to the main foliation, illustrating extremely fine-grained klockmannite (Kl - bluish greys), in association with minor umangite (Um - violet), clausthalite (Cth - off white), anjd eskebornite (Ebn - light brown). ...

© Günter Grundmann, Detmold

The microstructure of Se mineralization from Cacheuta, Argentina. Fine-grained granular aggregates of klockmannite (strong pale orange to greyish anisotropy), clausthalite (isotropic), and eskebornite (weak brownish to bluish grey anisotropy), in association with subhedral crystals of tyrrellite (isotropic). For further explanations see ...

© Günter Grundmann, Detmold.

The microstructure of Se mineralization from Cacheuta, Argentina. Cross-section through a foliated selenide veinlet perpendicular to the main foliation, illustrating a rubble breccia with extremely fine-grained klockmannite (strong pale orange to greyish anisotropy), in association with chalcopyrite (olive brown to bluish anisotropy), chalcocite ...

© Günter Grundmann, Detmold

The microstructure of Se mineralization from Cacheuta, Argentina. Cross-section through a foliated selenide veinlet perpendicular to the main foliation, illustrating extremely fine-grained klockmannite (strong pale orange to greyish anisotropy), in association with umangite (strong orange red shades), clausthalite (isotropic), and eskebornite ...

© Günter Grundmann, Detmold

The microstructure of Se mineralization from Cacheuta, Argentina. Cross-section through a foliated selenide veinlet perpendicular to the main foliation, illustrating extremely fine-grained klockmannite (strong pale orange to greyish anisotropy), in association with umangite (strong orange red shades), and clausthalite (isotropic). Notably, large ...

© Günter Grundmann, Detmold

The microstructure of Se mineralization from Cacheuta, Argentina. Fine-grained granular aggregate of eskebornite (Ebn – light brown), partially replaced along cracks and cleavage by klockmannite (Kl – cream to greenish grey to blue pleochroism), in association with clausthalite (Cth - white). For further explanations see reference: ...

© Günter Grundmann, Detmold.

The microstructure of Se mineralization from Cacheuta, Argentina. Cross-section through a foliated selenide veinlet perpendicular to the main foliation, illustrating extremely fine-grained klockmannite (strong pale orange to greyish anisotropy), in association with umangite (strong orange red shades) and clausthalite (isotropic). Notably, large ...

© Günter Grundmann, Detmold

The microstructure of Se mineralization from Cacheuta, Argentina. Cross-section through a foliated selenide veinlet perpendicular to the main foliation, illustrating extremely fine-grained klockmannite (Kl - bluish greys), in association with minor umangite (Um - violet), clausthalite (Cth - off white), eskebornite (Ebn - light brown), and very ...

© Günter Grundmann, Detmold

The microstructure of Se mineralization from Cacheuta, Argentina. Fine-grained granular aggregate of eskebornite (Ebn – light brown), partially replaced along cracks and cleavage by klockmannite (Kl – cream to greenish grey to blue pleochroism), in association with clausthalite (Cth - white). For further explanations see reference: ...

© Günter Grundmann, Detmold.

The microstructure of Se mineralization from Cacheuta, Argentina. Cross-section through a foliated selenide veinlet perpendicular to the main foliation, illustrating extremely fine-grained klockmannite (strong pale orange to greyish anisotropy), in association with minor umangite (strong orange red shades), clausthalite (isotropic), eskebornite ...

© Günter Grundmann, Detmold

The microstructure of Se mineralization from Cacheuta, Argentina. Fine-grained granular aggregate of eskebornite (Ebn – light brown) in association with klockmannite (Kl – cream to greenish grey to blue pleochroism), clausthalite (Cth - white) and chalcopyrite (Ccp - yellow). For further explanations see reference: Grundmann, G. and ...

© Günter Grundmann, Detmold.

The microstructure of Se mineralization from Cacheuta, Argentina. Cross-section through a foliated selenide veinlet perpendicular to the main foliation, illustrating extremely fine-grained klockmannite (strong pale orange to greyish anisotropy), in association with umangite (strong orange red shades), and clausthalite (isotropic). Notably, large ...

© Günter Grundmann, Detmold

The microstructure of Se mineralization from Cacheuta, Argentina. Cross-section through a foliated selenide veinlet perpendicular to the main foliation, illustrating extremely fine-grained klockmannite (strong pale orange to greyish anisotropy), in association with umangite (strong orange red shades), and clausthalite (isotropic). Notably, large ...

© Günter Grundmann, Detmold

The microstructure of Se mineralization from Cacheuta, Argentina. Cross-section through a foliated selenide veinlet perpendicular to the main foliation, illustrating extremely fine-grained klockmannite (strong pale orange to greyish anisotropy), in association with minor umangite (strong orange red shades), clausthalite (isotropic), and minor ...

© Günter Grundmann, Detmold

The microstructure of Se mineralization from Cacheuta, Argentina. Cross-section through a foliated selenide veinlet perpendicular to the main foliation, illustrating extremely fine-grained klockmannite (Kl - bluish greys), in association with umangite (Um - violet), and clausthalite (Cth - off white). Notably, large portions of klockmannite show ...

© Günter Grundmann, Detmold

The microstructure of Se mineralization from Cacheuta, Argentina. Cross-section through a foliated selenide veinlet perpendicular to the main foliation, illustrating extremely fine-grained klockmannite (strong pale orange to greyish anisotropy), in association with minor umangite (strong orange red shades), clausthalite (isotropic), and ...

© Günter Grundmann, Detmold

The microstructure of Se mineralization from Cacheuta, Argentina. Fine-grained granular aggregate of eskebornite (weak brownish to bluish grey anisotropy) in association with klockmannite (strong pale orange to greyish anisotropy), clausthalite (isotropic) and chalcopyrite (weak olive brown to blue grey anisotropy). For further explanations see ...

© Günter Grundmann, Detmold.

The microstructure of Se mineralization from Cacheuta, Argentina. Cross-section through a foliated selenide veinlet perpendicular to the main foliation, illustrating extremely fine-grained klockmannite (strong pale orange to greyish anisotropy), in association with minor umangite (strong orange red shades), clausthalite (isotropic), and ...

© Günter Grundmann, Detmold

The microstructure of Se mineralization from Cacheuta, Argentina. Cross-section through a foliated selenide veinlet perpendicular to the main foliation, illustrating extremely fine-grained klockmannite (Kl - bluish greys), in association with umangite (Um - violet), and very minor clausthalite (Cth - off white). Notably, large portions of ...

© Günter Grundmann, Detmold

The microstructure of Se mineralization from Cacheuta, Argentina. Cross-section through a foliated selenide veinlet perpendicular to the main foliation, illustrating extremely fine-grained klockmannite (Kl - bluish greys), in association with umangite (Um - violet), and clausthalite (Cth - off white). Notably, large portions of klockmannite show ...

© Günter Grundmann, Detmold