P. Richter's research while affiliated with University of Wuerzburg and other places

Publications (14)

Article
Comprehensive geochemical investigations of metabasites yielded constraints for a correlation of, or discrimination between the different tectonic units within the northeast Bavarian crystalline basement. The Münchberg nappe pile consists of at least five large tectonic units which exhibit differences in lithology, in part also in metamorphic grade...
Article
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The Spessart Crystalline Complex, north-west Bavaria contains two orthogneiss units of granitic to granodioritic composition, known as the Rotgneiss and Haibach gneiss, respectively, which are structurally conformable with associated metasediments. The igneous origin of the Rotgneiss is apparent from field and textural evidence, whereas strong defo...
Article
The metagabbro-amphibolite sequences in the KTB pilot hole contain intercalations of talc-chlorite-amphibole felses (or ''hosbachites''), which show transitional contacts to the adjacent metagabbros. The hosbachites are characterized by relics of a primary igneous texture and still contain igneous minerals like clinopyroxene, biotite and pseudomorp...
Article
Matchless is one of several metamorphosed massive copper-zinc sulfide deposits associated with the Matchless amphibolite belt in the upper Proterozoic Damara orogen (SWA/Namibia). In the footwall of the ore shoots are pyrite-bearing quartz-muscovite-(chlorite) schists with interlayered bands of massive pyrite-quartz rock and a distinctive biotite-r...
Article
Major-, trace- and rare-earth element chemistry studies of metabasite intercalations within different tectonic units of the East Bavarian crystalline basement leads to the following geochemical classification: The flaser amphibolites of the Erbendorf-Vohenstrauss Zone (ZEV) exhibit an enriched, E-MORB- or intraplate-like tholeiitic character, where...
Article
Zusammenfassung Die Orthogneise des Spessartkristallins lassen sich von einem granitischen bis granodioritischen Magma von S-Typ-Charakter ableiten, das durch Anatexis kontinentaler Kruste entstanden sein mu\ und in ein relativ oberflächennahes Krustenniveau intrudierte. Die Platznahme erfolgte vor 410–420 Ma, d. h. im Silur. Die Spurenelement-Must...
Article
On the Island of Andros, Cycladic Blueschist Belt, metamorphosed ferromanganoan sediments occur in widespread lateral distribution. They form concordant layers and lenses within a uniform sequence of quartz-rich metapelitic schists which can be derived from pelagic siliceous mudstones. Three main types of ferromanganoan metasediments were geochemic...
Article
The metamorphic complex of Samos is composed mainly of marbles and phyllites, typically with intercalations of serpentinites, meta-gabbros, blueschists, and greenschists. The meta-gabbros show typical flaser-structures, but contain frequent textural relics of the igneous protolith as well as relict clinopyroxene and brown hornblende. Primary plagio...
Article
The Habachtal emerald deposit, Hohe Tauern, is composed of blackwall sequences of the type: serpentinite — talc schist — chlorite schist or actinolite schist — biotite schist —albite gneiss and/or micaschist. 2 serpentinites, 33 blackwall rocks, 9 micaschists, 10 albite gneisses, and 5 aplitic gneisses were analyzed for major elements, and for Li,...

Citations

... Based on the metamorphic evolution, cooling history, petrographic and geochemical similarities, a close relation of the East Odenwald and the Spessart to the N has been supposed (Korn 1929;Chatterjee 1960;Okrusch and Richter 1986;Altenberger et al. 1990;Dombrowski et al. 1995;Will et al. 2015Will et al. , 2018. The orthogneisses of the Spessart (Red gneiss, 418 ± 18 Ma; Haibacher Gneiss, 410 ± 18 Ma; Dombrowski et al. 1995) have been correlated with similar intrusions of the East Odenwald (Lippolt 1986;Reischmann et al. 2001). ...
... Several studies were devoted to Samos Island that occupies a key-position at the transition between Aegean domain and western Turkey (Figs. 1,2a and 2c) [Mposkos, 1978;Papanikolaou, 1979;Theodoropoulos, 1979;Mposkos & Perdikatsis, 1984;Weidmann et al., 1984;Mezger & Okrusch, 1985;Okrusch et al., 1984;Chen, 1995;Will et al., 1998;Ring et al., 1999b;. The metamorphic succession of Samos consists of four distinct tectono-metamorphic units, from the base to the top. ...
... The ore shoots are elongate and plunge parallel to D 2 fold axes, displaying abundant evidence of plastic flow and pressure solution deformation, metamorphism, and recrystallization (Maiden, 1993). The Matchless mine sequence is structurally overturned (Klemd et al., 1989;Goldberg, 1976;Killick, 1983). The sulfides are hosted in quartzmuscovite-pyrite schist, psammitic schist, magnetite quartzite, chlorite-amphibole-ankerite schist, amphibole schist, and the amphibolite of the Kuiseb formation. ...
... Our understanding of iron-oxide and manganese-oxide/hydroxide ore deposits is based on a geological, geochemical, and geophysical database, such as within the Attic-Cycladic metallogenic belt [Attic-Cycladic Massif or Attic-Cycladic crystalline belt (ACCB)], related to both Mesozoic (e.g., Andros and Evia islands) and Pliocene-Pleistocene (Milos and Santorini islands) submarine hydrothermal activity in the South Aegean Volcanic Arc (SAVA) [1][2][3][4][5][6][7][8][9][10][11], (Figure 1). Most of the current Aegean submarine hydrothermal areas on the SAVA are located at relatively shallow depths (less than 200 m water depth) and are characterized by a large volume of gas released, both because of the degassing of the subducted slab and the mantle wedge as well as the thermal and chemical breakdown of the components of the marine sediments [2,3]. ...
... As shown in Fig. 8b, both WBG and HKG are I-type granitoid (ASI < 1.1 for I-type granitoid; Chappell and White 1974;White and Chappell 1977). The metaluminous character (Frost et al. 2001;Dombrowski et al. 1995;Raju 2017) of WBG and HKG is also confirmed by the common primary assemblages made up of plagioclase + hornblende + biotite. However, the Al-rich metaluminous (ASI = 0.99-1.05; ...
... From petrological studies on talc-chlorite-amphibole felses or hoesbachites, it was inferred that these rocks are the result of complex metasomatic alteration of mafic to ultramafic cumulates under amphibolite-to greenschist-facies conditions (Matthes and Schubert 1967;Schubert 1969;Okrusch et al. 1995). Cumulates form by gravimetric differentiation of early crystals that sink to the bottom of a magma chamber (Hunter 1996). ...
... Formation of the blackwall sequence results in the liberation of significant amounts of Be and enables the formation of emerald in the presence of Cr (Grundmann and Morteani, 1989). The source of Cr for such emeralds is likely to be the altered ultramafic rocks, whereas that of Be is considered to be fluids mobilized during the regional metamorphism of the spatially associated, pre-existing volcanic and sedimentary, e.g., Habachtal deposit, Austria (Grundmann and Morteani, 1989;Morteani and Grundmann, 1977;Okrusch et al., 1981), or pegmatitic rocks, e.g., Leydsdorp deposit, Transvaal (Grundmann and Morteani, 1989). (3) Sedimentary rocks (e.g., carbonaceous shale) with or without pegmatite intrusions. ...
... The metabasaltic rocks of the Randschiefer Formation hosting the ore lenses near Kupferberg have geochemical characteristics indicative of a continental rift setting (Höhn et al., unpubl. data), whereas an intra-plate setting is indicted for the Prasinit-Phyllit Formation, which hosts the ore lenses near Neufang (Okrusch et al. 1989). ...
... Ca, Na, and K act as mobile elements; while elements such as P, Al, and Ti are relatively immobile and elements such as Zr, Sc, and Y are practically immobile (Pearce and Cann, 1973;Winchester and Floyd, 1977; Pearce Table 3 Major elements (wt%) and trace elements (ppm) whole-rock chemistry and Niggli values of metabasites and metapelites from Golgohar mine. Schüssler et al., 1989;Rollinson, 2014), accordingly the use of major elements in the study of amphibolites may not be reliable for geochemical classification and determination of paleotectonic setting. Regarding the metamorphosed basic rocks, the Zr/Ti vs. Nb/Y diagram (Pearce, 1996) was also used and the data suggest basalt, basaltic andesite and andesite compositions (Fig. 8B). ...