Search Results - "SCHWARZ, Winfried H."
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Petrology, geochemistry and tectono-magmatic affinity of gabbroic olistoliths from the ophiolite mélange in the NW Dinaric-Vardar ophiolite zone (Mts. Kalnik and Ivanščica, North Croatia)
Published in Geologia Croatica (2015)“…Previous study of mafic extrusive sequences suggested an 80 Ma period of tectono-magmatic evolution of the ROD from intra-continental rifting during the…”
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U‐Pb dating of zircons from an impact melt of the Nördlinger Ries crater
Published in Meteoritics & planetary science (01-02-2020)“…In situ U‐Pb measurements on zircons of the Ries impact crater are presented for three samples from the quarry at Polsingen. The U‐Pb data of most zircons plot…”
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Al-Mg and U-Pb chronological records of Erg Chech 002 ungrouped achondrite meteorite
Published in Geochimica et cosmochimica acta (15-02-2023)“…Achondrite meteorites are remnants of the earliest planetary differentiation processes in the Solar System. They have been used to anchor short-lived…”
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A Reappraisal of the 40Ar/38Ar Dating Technique via Irradiation with γ‐Rays
Published in Geostandards and geoanalytical research (01-09-2023)“…In a reconnaissance study, we investigated the potential of γ‐ray induced production of 38ArK from 39K for geochronological applications. For this purpose,…”
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Intercalibration of 40Ar– 39Ar age standards NL-25, HB3gr hornblende, GA1550, SB-3, HD-B1 biotite and BMus/2 muscovite
Published in Chemical geology (01-07-2007)“…40Ar– 39Ar dating requires precise and accurate age data of standard fluence monitors. Besides primary calibration of K and 40Ar concentrations (i.e. the ages…”
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Newly detected shock-induced high-pressure phases formed in amphibolite clasts of the suevite breccia (Ries impact crater, Germany): Liebermannite, kokchetavite, and other ultrahigh-pressure phases
Published in Contributions to mineralogy and petrology (01-08-2022)“…Amphibolite clasts in the suevite of the Ries impact crater contain shock-induced melt veins (SMVs) with high-pressure phases such as majoritic garnet,…”
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Modeling the evolution of the parent body of acapulcoites and lodranites: A case study for partially differentiated asteroids
Published in Icarus (New York, N.Y. 1962) (01-09-2018)“…•We model the thermo-chemical evolution of the acapulcoite-lodranite parent body.•We fit the thermo-chronological data and the differentiation degree of…”
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Petrology and U–Pb zircon age of the Variscan porphyroclastic Rand Granite at the southeastern margin of the Central Schwarzwald Gneiss Complex (Germany)
Published in International journal of earth sciences : Geologische Rundschau (01-09-2019)“…The Variscan Rand Granite as defined in this paper is a deformed I-type biotite granite that intruded along the southern-to-southeastern margin of the Central…”
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Carboniferous high-potassium I-type granitoid magmatism in the Eastern Pontides: The Gümüşhane pluton (NE Turkey)
Published in Lithos (01-04-2010)“…The Gümüşhane pluton, a high-K calc-alkaline I-type granodiorite/granite complex, forms an important component of the pre-Liassic basement of the Eastern…”
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Post-collisional adakite-like magmatism in the Ağvanis Massif and implications for the evolution of the Eocene magmatism in the Eastern Pontides (NE Turkey)
Published in Lithos (01-07-2011)“…In the Anatolia, the Caucasus and northwest Iran, the Eocene epoch is characterized by widespread basic to acidic magmatism, whose temporal and spatial…”
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Linking shock textures revealed by BSE, CL, and EBSD with U‐Pb data (LA‐ICP‐MS and SIMS) from zircon from the Araguainha impact structure, Brazil
Published in Meteoritics & planetary science (01-10-2019)“…A silicious impact melt rock from polymict impact breccia of the northern part of the alkali granite core of the Araguainha impact structure, central Brazil,…”
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40Ar-39Ar step-heating of impact glasses from the Nördlinger Ries impact crater-Implications on excess argon in impact melts and tektites
Published in Meteoritics & planetary science (01-06-2014)“…Seven impact melts from various places in the Nördlinger Ries were dated by 40Ar‐39Ar step‐heating. The aim of these measurements was to increase the age data…”
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A Rhaetian 40Ar/39Ar age for the Rochechouart impact structure (France) and implications for the latest Triassic sedimentary record
Published in Meteoritics & planetary science (01-08-2010)“…– 40Ar/39Ar dating of potassium feldspar (primary spherulitic‐blocky and secondary idiomorphic K‐feldspar) separated from impact‐metamorphosed gneiss found…”
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Solar noble gases in an iron meteorite indicate terrestrial mantle signatures derive from Earth’s core
Published in Communications earth & environment (01-12-2021)“…Abstract Noble gases are important tracers of planetary accretion and acquisition of volatiles to planetary atmospheres and interiors. Earth’s mantle hosts…”
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Nature, age, and emplacement of the Spongtang Ophiolite, Ladakh, NW India
Published in Journal of the Geological Society (01-03-2019)“…The Spongtang ophiolite (Ladakh, NW India) constrains the nature of oceanic lithosphere before Indo-Asia collision and key stages in the development of the…”
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Establishing a 14.6 ± 0.2 Ma age for the Nördlinger Ries impact (Germany)-A prime example for concordant isotopic ages from various dating materials
Published in Meteoritics & planetary science (01-04-2010)“…– 40Ar/39Ar dating of recrystallized K‐feldspar melt particles separated from partially molten biotite granite in impact melt rocks from the approximately 24…”
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Post-collisional plutonism with adakite-like signatures: the Eocene Saraycık granodiorite (Eastern Pontides, Turkey)
Published in Contributions to mineralogy and petrology (01-11-2005)“…The post-collisional Saraycik granodiorite intruded into a late Paleocene to early Eocene nappe pile that formed during collision of the Pontides in the North…”
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A Carnian 40Ar/39Ar age for the Paasselkä impact structure (SE Finland)-An update
Published in Meteoritics & planetary science (01-01-2015)“…A recrystallized band of pale feldspathic impact melt in a gneissic impact breccia from the approximately 10 km Paasselkä impact structure in southeast Finland…”
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The two Suvasvesi impact structures, Finland: Argon isotopic evidence for a "false" impact crater doublet
Published in Meteoritics & planetary science (01-05-2016)“…The two neighboring Suvasvesi North and South impact structures in central‐east Finland have been discussed as a possible impact crater doublet produced by the…”
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The Cretaceous-Palaeogene boundary at Gorgonilla Island, Colombia, South America
Published in Terra nova (Oxford, England) (01-02-2016)“…The discovery of a new Cretaceous/Palaeogene (K/Pg) bathyal marine sequence on Gorgonilla Island, SW Colombia, extends the presence of Chicxulub impact…”
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