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Article
Palaeoproterozoic A-type felsic magmatism in the Khetri Copper Belt, Rajasthan, northwestern India: petrologic and tectonic implications
A number of small Palaeoproterozoic granitoid plutons were emplaced in the Khetri Copper Belt, which is an important Proterozoic metallogenic terrane in the northeastern part of Aravalli mountain range. Contig...
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Article
Contact metamorphism and metasomatism at a dolerite-limestone contact in the Gebel Yelleq area, Northern Sinai, Egypt
At the northeastern flank of Gebel Yelleq, northern Sinai, pure limestones of Upper Cretaceous age were subjected to a thermal overprint, caused by a c. 80 m thick Tertiary olivine dolerite sill. Metasomatic supp...
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Article
Phase relations of calc-silicate assemblagesin the Auerbach marble, OdenwaldCrystalline Complex, Germany
In the Odenwald Crystalline Complex, calc-silicate rocks are concentrated at the margins of the marble layer of Auerbach. They were presumably formed by metasomatic exchange between the calcite marble and the...
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Article
Simultaneous horst-basin formation and magmatism during Late Variscan transtension: evidence from 40Ar/39Ar and 207Pb/206Pb geochronology in the Ruhla Crystalline Complex
Ar/39Ar–mica and 207Pb/206Pb–zircon dates are presented and combined with existing P–T data and the sedimentary record. These data indicate that the RCC was faulted into three segments which underwent different e...
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Article
Phase relations of calcic amphibole–orthoamphibole–chlorite- talc assemblages, with applications to ultramafic rocks from the KTB pilot hole, Bavaria
Lenses of ultramafic rocks intercalated within a metagabbro–amphibolite sequence were encountered in the KTB pilot hole. A pervasive metamorphic overprint formed the dominating assemblage calcic amphibole–ort...
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Article
Post-peak re-equilibration in a mafic gneiss from the KTB main hole: implications for the metamorphic evolution
Detailed microprobe investigations were carried out on mineral phases of a mafic garnet–biotite–hornblende and garnet–biotite gneiss from the KTB main hole. The results indicate that the complex zonation patt...
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Article
Orthogneisses in the Spessart Crystalline Complex, north-west Bavaria: Silurian granitoid magmatism at an active continental margin
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 con...
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Article
Talc-chlorite-amphibole felses of the KTB pilot hole, Oberpfalz, Bavaria: Protolith characteristics and phase relationships
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 hosbach...
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Article
Phase relationships and fluid inclusions characteristics of the metamorphosed, stratiform sulfide deposit Matchless, Namibia
Silikatparagenesen im Nebengestein der metamorphen, schichtgebundenen Kupferlagerstätte Matchless, Damara-Orogen, Namibia, ergeben Temperaturen zwischen 550 und 625 °C und Drucke von 6–8 kbar beim Höhepunkt de...