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Zeitliche und räumliche Verteilung von Mineralvergesellschaftungen in spätquartären Sedimenten des Arktische Ozeans und ihre Nützlichkeit als Klimaindikatoren während der Glazial/Interglazial-Wechsel (Regional and temporal variations of mineral assemblages in Arctic Ocean sediments as climate indicator during glacial/interglacial changes).

Vogt, Christoph (PANGAEA, 2003-12-04)

ZEMKORITE, A NEW CARBONATE FROM KIMBERLITES OF YAKUTIA

Ushchapovskaya Z.F.; Kashayev A.A.; Sizykh Y.I.; Yegorov N.K.; Bogdanov G.V. (1988)

In the Udachnaya kimberlite pipe in the Daldyn field, Yakutia, the authors discovered and studied in our Institute the new carbonate Na2Ca(CO3)2, called zemkorite and close in composition to the known carbonate nyerereite, ...

ZEOLITES AND COEXISTING AUTHIGENIC MINERALS IN MIOCENE TUFFS OF THE ALAçATı (ÇEşME) AREA, TURKEY

Kaçmaz H.; Köktürk U. (2006)

The zeolites and coexisting minerals of the silicic vitric tuffs in the Alaçatı (Çeşme) area, west of İzmir (Turkey), were studied. Mordenite is the most abundant zeolite in tuffs of the Alaçatı area and usually coexists ...

ZEOLITES IN HYDROTHERMALLY ALTERED ROCKS

Utada M. (2001)

Over the past 40 years, two universally accepted maxims of geology dealing with zeolite minerals have been shown to be incorrect: the first is that zeolites occur primarily as cavity fillings in basaltic igneous rocks, and ...

ZINC IN SPINELS OF PERIDOTITE XENOLITHS FROM PLIOCENE BASANITES OF THE VITIM VOLCANIC FIELD

Litasov K.D.; Mekhonoshin A.S. (2000)

A group of low-temperature peridotites with equigranular mosaic texture is distinguished among spinel peridotite xenoliths from Pliocene basanites of the Dzhilinda River. The mineral compositions of these peridotites are ...

ZINC MOBILITY AND SPECIATION IN SOIL COVERED BY CONTAMINATED DREDGED SEDIMENT USING MICROMETER-SCALE AND BULK-AVERAGING X-RAY FLUORESCENCE, ABSORPTION AND DIFFRACTION TECHNIQUES

Isaure M.-P.; Manceau A.; Geoffroy N.; Laboudigue A.; Tamura N.; Marcus M.A. (2005)

The mobility and solid-state speciation of zinc in a pseudogley soil (pH = 8.2–8.3) before and after contamination by land-disposition of a dredged sediment ([Zn] = 6600 mg kg−1) affected by smelter operations were studied ...

ZINC SORPTION TO BIOGENIC HEXAGONAL-BIRNESSITE PARTICLES WITHIN A HYDRATED BACTERIAL BIOFILM

Toner B.; Sposito G.; Manceau A.; Webb S.M. (2006)

Biofilm-embedded Mn oxides exert important controls on trace metal cycling in aquatic and soil environments. The speciation and mobility of Zn in particular has been linked to Mn oxides found in streams, wetlands, soils, ...

'ZIPPER-RIFT': A TECTONIC MODEL FOR NEOPROTEROZOIC GLACIATIONS DURING THE BREAKUP OF RODINIA AFTER 750 MA

Eyles N.; Januszczak N. (2004)

The ‘Snowball Earth’ model of Hoffman et al. [Science 281 (1998) 1342] has stimulated renewed interest in the causes of glaciation in Earth history and the sedimentary, stratigraphic and geochemical response. The model ...

ZIRCON (U-TH)/HE THERMOCHRONOMETRY: HE DIFFUSION AND COMPARISONS WITH 40AR/39AR DATING

Reiners P.W.; Spell T.L.; Nicolescu S.; Zanetti K.A. (2004)

(U-Th)/He chronometry of zircon has a wide range of potential applications including thermochronometry, provided the temperature sensitivity (e.g., closure temperature) of the system be accurately constrained. We have ...

ZIRCON AGE CONSTRAINTS ON SEDIMENT PROVENANCE IN THE CASPIAN REGION

Allen M.B.; Morton A.C.; Fanning C.M.; Ismail-Zadeh A.J.; Kroonenberg S.B. (2006)

Sensitive high-resolution ion microprobe (SHRIMP) U-Pb ages for detrital zircons from the Caspian region reveal the age ranges of basement terrains that supplied the sediment. One sample from the modern Volga river has ...

Zircon ages and Hf isotopic constraints on sources of clastic metasediments of the Slyudyansky high-grade complex, southeastern Siberia: Implication for continental growth and evolution of the Central Asian Orogenic Belt

Kovach V.; Salnikova E.; Wang K.-L.; Jahn B.M.; Chiu H.-Y.; Reznitskiy L.; Kotov A.; Iizuka Y.; Chung S.-L. (2013)

We present results of combined in situ U–Pb dating of detrital zircons and zircon Hf and whole-rock Nd isotopic compositions for high-grade clastic metasedimentary rocks of the Slyudyansky Complex in eastern Siberia. This ...

Zircon and muscovite ages, geochemistry, and Nd–Hf isotopes for the Aktyuz metamorphic terrane: Evidence for an Early Ordovician collisional belt in the northern Tianshan of Kyrgyzstan

Kröner A.; Alexeiev D.V.; Hegner E.; Rojas-Agramonte Y.; Corsini M.; Chao Y.; Wong J.; Windley B.F.; Liu D.; Tretyakov A.A. (2012)

The Aktyuz metamorphic terrane in the Kyrgyz northern Tianshan consists of granitoid gneisses and migmatites with subordinate paragneisses, greenschists, presumed meta-ophiolites, and garnet amphibolite dykes that contain ...

ZIRCON CRYSTAL MORPHOLOGY, TRACE ELEMENT SIGNATURES AND HF ISOTOPE COMPOSITION AS A TOOL FOR OETROGENETIC MODELLING: EXAMPLES FROM EASTERN AUSTRALIAN GRANITOIDS

Belousova E.A.; Griffin W.L.; O'Reilly S.Y. (2006)

In situ laser ablation inductively coupled plasma mass spectrometry analysis of trace elements, U-Pb ages and Hf isotopic compositions of magmatic zircon from I- and S-type granitoids from the Lachlan Fold Belt (Berridale ...

ZIRCON CRYSTAL MORPHOLOGY, TRACE ELEMENT SIGNATURES AND HF ISOTOPE COMPOSITION AS A TOOL FOR PETROGENETIC MODELLING: EXAMPLES FROM EASTERN AUSTRALIAN GRANITOIDS

Belousova E.A.; Griffin W.L.; Oreilly S.Y. (2006)

In situ laser ablation inductively coupled plasma mass spectrometry analysis of trace elements, U–Pb ages and Hf isotopic compositions of magmatic zircon from I- and S-type granitoids from the Lachlan Fold Belt (Berridale ...

ZIRCON GEOCHRONOLOGY OF THE ALEKSANDROV METAMORPHIC COMPLEX, SOUTHERN URALS

Krasnobaev A.A.; Cherednichenko N.V. (2004)

The Aleksandrov Complex (AC) of metamorphic rocks is restricted to the long-lived Zyuratkul Fault on the western slope of the southem Urals, 2-3 km east of the known Taratash Complex. It makes up a NNE-trending tectonic ...

ZIRCON GEOCHRONOLOGY OF THE SALDA METAMORPHIC COMPLEX, CENTRAL URALS

Krasnobaev A.A.; Davydov V.A. (2003)

Investigations of zircon geochronology of the Salda metamorphic complex are continued in case of metamorphic rocks in eastern slope of Middle Urals. Results of the investigations make it possible to compare analytic and ...

ZIRCON MEGACRYSTS FROM KIMBERLITE: OXYGEN ISOTOPE VARIABILITY AMONG MANTLE MELTS

Valley J.W.; Spicuzza M.J.; Kinny P.D.; Schulze D.J. (1998)

The oxygen isotope ratios of Phanerozoic zircons from kimberlite pipes in the Kaapvaal Craton of southern Africa and the Siberian Platform vary from 4.7 to 5.9‰ VSMOW. High precision, accurate analyses by laser reveal ...

ZIRCON PARAGENESES IN MIGMATITES OF THE PRE-RIPHEAN CRYSTALLINE BASEMENT OF THE SIKHOTE ALIN

Levashev G.B.; Semenova N.N.; Sapin V.I. (1989)

Microprobe study of zircon parageneses in migmatites of different origin shows that the geochemical properties of zircon could be used to solve important petrological and geochemical problems. The standards employed for ...

ZIRCON REACTION AND STABILITY OF THE U-PB ISOTOPE SYSTEM DURING INTERACTION WITH CARBONATE FLUID: EXPERIMENTAL HYDROTHERMAL STUDY

Rizvanova N.G.; Levchenkov O.A.; Maslenikov A.V.; Komarov A.N.; Makeev A.F.; Levskiy L.K.; Belous A.E.; Bezmen N.I. (2000)

The interpretation of metamorphically induced U-Pb isotopic discordance requires a thorough understanding of zircon-fluid interactions. With this aim we have studied the behaviour of metamict and crystalline zircon phases ...

ZIRCON SHRIMP AGE AND GEOCHEMISTRY OF CAIZHONG GRANITE FROM EAST TIANSHAN, XINJIANG, CHINA

Li W.; Xia B.; Wang Q.; Wang H.; Wang K. (2006)

SHRIMP U-Pb age for zircons, major and trace elements and Nd-Sr isotopic compositions for biotite monzonitic granite of Caizhong in Kangguertage area in eastern Tianshan of the Xinjiang are studied in this paper. A 206Pb/238U ...

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