Abstract U-Pb geochronology on baddeleyite is a powerful technique that can be applied effectively to chronostratigraphy. In southern Africa, the Kaapvaal Craton hosts well-preserved Mesoarchean Paleoproterozoic geological record, including Neoarchean Ventersdorp Supergroup. It overlies Witwatersrand Supergroup and its world-class gold deposits. The comprises Klipriviersberg Group, Platberg Pniel Group. However, exact timing of formation controversial. Here we present 2789 ± 4 Ma 2787 2...

Abstract This work reports the first data on Variscan metamorphic evolution of Marmarosh/Maramuresh massif in Outer Eastern Carpathians. Geothermobarometry determinations coupled with U-Th-Pb dating monazite, apatite, titanite and rutile were used to construct P-T-t paths refine geodynamic pre-Alpine crystalline basement. These clockwise evolve from 560–630 MPa 515–535 °C c. 900–1180 north (Ukraine), while southern nappe (Romania), conditions 455–620 545–555 °C, through 670–745 540–560...

Abstract Wastes accumulated at Piekary Śląskie, Poland, are the result of 150 years continuous working Orzeł Biały smelting plant. Slags composed of: oxides (spinel, hematite, zincite); silicates and aluminosilicates (olivine, monticellite–kirschteinite, titanite, merwinite, pyroxene, melilite, feldspars: plagioclases plumbean K-feldspar, nepheline, kalsilite, leucite); sulfides (pyrrhotite, rudashevskyite, galena), metallic phases (pure iron iron–arsenic mixture) secondary (gypsum,...

The Tatra granitoid pluton (Central Western Carpathians, Poland/Slovakia) is an example of composite polygenetic intrusion, comprising many magmatic pulses varying compositionally from diorite to granite. U–Pb LA-MC-ICP-MS zircon dating successive magma batches indicates the presence episodes at 370–368, 365, 360, 355 and 350–340 Ma, all together covering a time span 30 Ma activity. partial resorption recycling former material (“petrological cannibalism”) was result incremental growth...

In the Variscan Western Tatra granites hybridization phenomena such as mixing and mingling can be observed at contact of mafic precursors dioritic composition more felsic granitic host rocks. The textural evidence include: plagioclase–K-feldspar–sphene ocelli, hornblende- biotite-rimmed quartz plagioclase with Ca-rich spike zonation, inversely zoned K-feldspar crystals, clots, poikilitic mixed apatite morphologies, phenocrysts. apparent pressure range magma event was calculated 6.1 kbar to...

ABSTRACT The High Tatra granite intrusion is an example of a Variscan syn-tectonic, tongue-shaped intrusion. In some portions the intrusion, structures occur which appear to be sedimentary origin. These include similar graded bedding, cross-bedding, troughs and flame structures, K-feldspar-rich cumulates magmatic breccias. Formation these might related changing magma properties, including crystal fraction, development mush decrease in viscosity, stimulated by influx mafic high volatile...

Detailed cathodoluminescence (CL) imaging of zircon crystals, coupled with Laser Ablation Multi-Collector Inductively Coupled Plasma Mass Spectrometry (LA-MC-ICP-MS) U-Pb dating was used to develop new insights into the evolution granitoids from High Tatra Mountains. The results show two distinct age groups (350±5 Ma and 337±6 Ma) recorded cores rims domains, respectively. Obtained point that last magmatic activity in granitoid intrusion occurred at ca. 330 Ma. previously suggested 314...

This study presents apatite LA-ICP-MS U-Pb age and trace elements concentrations data from different granite types the Tatra Mountains, Poland. Apatite monazite xenotime-bearing High was dated at 339 ± 5 Ma. The LREE patterns reflect two of magmas that contributed to this layered magma series. a hybrid allanite-bearing diorite Goryczkowa Unit 340 4 Ma with depletion reflecting role allanite titanite during crystallization. crystals cumulative rock Western Mountains were 344 3 is one main REE...

The unique among pyrometallurgical slags, coarse-grained (up to 2.5 cm) segregations 40 cm long) rimmed by "aplitic" border zones occur within holocrystalline historical Zn-smelting slag in Katowice, S Poland. Slag surrounding the consists of olivine, spinel series, melilite, clinopyroxene, leucite, nepheline and sulphides. Ca-olivines, kalsilite mica compositionally similar oxykinoshitalite addition series melilite. Miarolitic massive pegmatite-like are built subhedral crystals...

In the bottom part of tongue-shaped, layered granitoid intrusion, exposed in Western Tatra Mts., apatite-rich granitic rocks occur as pseudo-layers and pockets between I-type hybrid mafic precursors homogeneous S-type felsic granitoids. The are peraluminous (ASI = 1.12–1.61), with P2O5 contents ranging from 0.05 to 3.41 wt.% (<7.5 vol.% apatite), shoshonitic high-K calc-alkaline. Apatite is present long-prismatic zoned crystals (Ap1) large xenomorphic unzoned (Ap2). Ap1 apatite biotite...

Crystalline exotic boulders within the sedimentary sequences of Outer Carpathians likely represent Proto-Carpathian basement, which was exposed and eroded during Mesozoic Cenozoic evolution Western Carpathian basin. The majority were derived from Silesian Ridge, separated Magura Basin Domains, became a source region Late Cretaceous–Early Paleocene tectonism. Felsic crystalline clasts Nappe yield U–Pb zircon magmatic protolith ages 603.7 ± 3.8 Ma 617.5 5.2 while felsic Subsilesian an age...

Abstract The geochemical characteristics as well the LA-MC-ICP-MS U-Pb zircon age relationship between two granitoid suites found in Goryczkowa crystalline core Western Tatra Mountains were studied. petrological investigations indicate that both emplaced at medium crustal level, a VAG (volcanic arc granites) tectonic setting. However, these differ source material melted and represent different magmatic stages: suite 1 represents high temperature, oxidized, pre-plate collision intrusion, ca....

In the crystalline basement of Tatra Mountains (Poland/Slovakia) two types tourmaline-rich breccia zones are described, both having originated from magmatic fluids and showing a 350 ± 1 Ma Re-Os model age.Both T1 brecciated pegmatites T2 vein-breccias cemented by tourmaline-quartz matrix.In breccias, metasomatic replacement feldspars tourmaline overgrowths small Tur 2 tourmalines on primary pegmatitic crystals suggest an important role for processes.The microcrystalline nature...

Activity at the smelting plant Katowice–Szopienice dates back to nineteenth century. Currently, Museum of Zinc has been funded site. Unfortunately, as a result unrest during both World Wars, all technological descriptions were lost. Three historically described samples provided by and additional slag lining collected directly from furnace. "Enriched ore" is dominated ZnS (89.5%) sphalerite wurtzite accompanied gangue minerals. "Roasted composed mainly zincite (74%) resulting oxidation ZnS....

Southeastern Bulgaria is composed of a variety rocks from pre-Variscan (ca. 0.3 Ga) to pre-Alpine sensu lato 0.15 time. The Sakar Unit in this region comprises series granitoids and gneisses formed or metamorphosed during these events. It cut by post-Variscan hydrothermal veins, yet lacks pervasive Alpine deformation. thus represents key unit for detecting potential tectonism associated with the enigmatic Cimmerian Orogenic episode, but limited geochronology has been undertaken on unit. Here...

Abstract This study presents the first complete reconstruction of gold metallurgy in Złoty Stok, Poland. The key parameters process (i.e., temperature smelting and solidification, melt viscosity, oxygen fugacity) are calculated using remnants process: metallurgical slags. slags consist silicate phases olivine, pyroxene), sulfides arsenides pyrrhotite, Fe 2 As), as well glass. These chemically dominated by SiO (&lt; 56.60 wt%), MgO 18.36 FeO 15.36 CaO 15.19 wt%). obtained results indicate...