Gerhard, Ganzfigurbildnis

Signatur des Originals: S 36/F00544

Gerhard Ritter, Rollenbild, Brustbild

Signatur des Originals: S 36/F01648

Irene Triesch, Rollenbild, Brustbild, in: Gerhard Hauptmann: Elga

Signatur des Originals: S 36/F06887

Edvard Grieg, Gerhard Schjelderup, Erica Nissen, Ole Olsen, Johan Svendsen, Christian Sinding {[u.a.], Gruppenbildnis

Signatur des Originals: S 36/F08697

Gerhard Schjedlerup, Brustbild

Signatur des Originals: S 36/F09800

Gerhard Stolze als Loge, Rollenbild, in: Richard Wagner: Das Rheingold, Bayreuther Festspiele, 1960

Signatur des Originals: S 36/F09980

Ellen Daub als Elisabeth Wagner, Gerhard Ritter als Fred Gürtler, Szenenfoto, Doppelbildnis, in: Richard Duschinsky: Komparserie, Frankfurt a. M.: Schauspielhaus, 1933

Signatur des Originals: S 36/F10667

Ludwig Anzengruber, Brustbild - Viktor Blüthgen, Brustbild - Gerhard von Amyntor, Brustbild - Karl Barton, Brustbild - Heinrich Bulthaupt, Brustbild

Signatur des Originals: S 36/F11970

Hans Baur, Werner Siedhoff, Szenenfoto, in: Gerhard Schumann: Gudruns Tod

Signatur des Originals: S 36/F12032

Heinz-Gerhard Zircher, Brustbild

Signatur des Originals: S 36/F11946

Heinrich Gerhard Lentz, Brustbild

Signatur des Originals: S 36/G03289

Geological and geochemical characteristics of the Tersang gold deposit, Malaysia: implications for genesis and gold exploration

The Central gold belt of peninsular Malaysia comprises a number of gold deposits located in the east of the N-S striking Bentong-Raub Suture Zone. The Tersang gold deposit is one of the gold deposits in the gold belt and hosted in sandstone, rhyolite and breccia units. The deposit has an inferred resource of 528,000 ounces of gold. The geochronology of the Tersang deposit has been newly constrained by LA ICP-MS U-Pb zircon dating. The maximum depositional age of the host sedimentary rocks ranges from Early Carboniferous to Early Permian (261.5 ± 4.9 Ma to 333.5 ± 2.5 Ma) for the host sandstone and Late Triassic for the rhyolite intrusion (218.8 ± 1.7 Ma). Textural characteristics of pyrite have revealed five types including (1) Euhedral to subhedral pyrite with internal fracturing and porous cores located in the sandstone layers (pyrite 1); (2) Anhedral pyrite overgrowths on pyrite 1 and disseminated in stage 1 vein (pyrite 2); (3) Fracture-filled or vein pyrite located in stages 1 and 2 vein (pyrite 3); (4) Euhedral pyrite with internal fractures also located in stage 2 vein (pyrite 4); and (5) Subhedral clean pyrite located in the rhyolite intrusion (pyrite 5). Based on pyrite mapping and spot analyses, two main stages of gold enrichment are documented from the Tersang gold deposit. Gold in sandstone-hosted pyrite 1 (mean 4.3 ppm) shows best correlation with Bi and Pb (as evidenced on pyrite maps). In addition, gold in pyrite 3 (mean 8 ppm) located in stage 2 vein shows a good correlation with As, Ag, Sb, Cu, Tl, and Pb. In terms of gold exploration, we suggest that elements such as As, Ag, Sb, Cu, Tl, Bi, and Pb associated with Au may serve as vectoring tools in gold exploration. Our new geological, structural, geochemical and isotopic data together with mineral paragenesis, pyrite chemistry and ore fluid characteristics indicate that the Tersang gold deposit is comparable to a sediment-hosted gold deposit. Our new genetic model suggests deposition of the Permo-Carboniferous sediments followed by intrusion of rhyolitic magma in the Late Triassic. At a later stage, gold mineralisation overprinted the rhyolite intrusion and the sandstone.

Clay mineral and heavy metal composition of sea-bed surface sediments and pre-Holocene sediment samples taken during POLARSTERN cruise ANT-XXIII/9

Surface mineralogical compositions and their association to modern processes are well known from the east Atlantic and south-west Indian sectors of the Southern Ocean, but data from the interface of these areas - the Prydz Bay-Kerguelen region - is still missing. The objective of our study was to provide mineralogical data of reference samples from this region and to relate these mineralogical assemblages to hinterland geology, weathering, transport and depositional processes. Clay mineral assemblages were analysed by means of X-ray diffraction technique. Heavy mineral assemblages were determined by counting of gravity-separated grains under a polarizing microscope. Results show that by use of clay mineral assemblages four mineralogical provinces can be subdivided: i) continental shelf, ii) continental slope, iii) deep sea, iv) Kerguelen Plateau. Heavy mineral assemblages in the fine sand fraction are relatively uniform except for samples taken from the East Antarctic shelf. Our findings show that mineralogical studies on sediment cores from the study area have the potential to provide insights into past shifts in ice-supported transport and activity and provenance of different water masses (e.g. Antarctic slope current and deep western boundary current) in the Prydz Bay-Kerguelen region.