Journal Title
Title of Journal: Contrib Mineral Petrol
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Abbravation: Contributions to Mineralogy and Petrology
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Publisher
Springer Berlin Heidelberg
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Authors: Vratislav Hurai Klaus Simon Uwe Wiechert Jochen Hoefs Patrik Konečný Monika Huraiová Jacques Pironon Jozef Lipka
Publish Date: 1998/10/01
Volume: 133, Issue: 1-2, Pages: 12-29
Abstract
Globules of irondominated 59–69 wt FeOtot and titaniumdominated 435 wt TiO2 oxide melts have been detected in igneous xenoliths from PliocenetoPleistocene alkali basalts of the Western Carpathians Fluid inclusion and mineral composition data indicate immiscible separation of the highironoxide melt HIM at magmatic temperatures The HIM separation occurred during clinopyroxene augite accumulation in an alkali trachybasalt and continued during crystallization of amphibole kaersutite and Kfeldspar anorthoclase the latter coexisting with trachyte and alkalic rhyolite residual melts Some HIM was also expelled from subalkalic rhyolite 70–77 SiO2 coexisting with An27–45 plagioclase and quartz in granitic tonalitetrondhjemite xenoliths Oxygen fugacities during HIM separation range from −14 to +06 log units around the QFM buffer A close genetic relationship between HIMhosted xenoliths and mantlederived basaltic magma is documented by mineral 18O values ranging from 49 to 59‰ VSMOW δD values of gabbroic kaersutite between −61 and −86‰ VSMOW are in agreement with a presumed primary magmatic water source Most trace elements except Li Rb and Cs have preferentially partitioned into the HIM The HIM/Simelt partition coefficients for transition elements Sc V Cr Co Ni and base metals Zn Cu Mo are between 2–160 resulting in extreme enrichment in the HIM La and Ce also concentrate in the silicic melt whereas TbTm in the HIM Hence the immiscible separation causes REE fractionation and produces residual silicic melt enriched in LREE and depleted in HREE The weak fractionation among TbTm and Yb Lu can be attributed to recurrent extraction of the HIM from the magmatic system while flat HREE chondritenormalized patterns are interpreted to indicate no or little loss of the HIM
Keywords:
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Other Papers In This Journal:
- Precise estimation of pressure–temperature paths from zoned minerals using Markov random field modeling: theory and synthetic inversion
- Formation of cordierite-bearing lavas during anatexis in the lower crust beneath Lipari Island (Aeolian arc, Italy)
- An Early Cretaceous garnet pressure–temperature path recording synconvergent burial and exhumation from the hinterland of the Sevier orogenic belt, Albion Mountains, Idaho
- Crystal reaming during the assembly, maturation, and waning of an eleven-million-year crustal magma cycle: thermobarometry of the Aucanquilcha Volcanic Cluster
- Origin of phlogopite-orthopyroxene inclusions in chromites from the Merensky Reef of the Bushveld Complex, South Africa
- An empirical garnet (YAG) – xenotime thermometer
- Magma storage and mixing conditions for the 1953–1974 eruptions of Southwest Trident volcano, Katmai National Park, Alaska
- In situ Re–Os isotopic analysis of platinum-group minerals from the Mayarí-Cristal ophiolitic massif (Mayarí-Baracoa Ophiolitic Belt, eastern Cuba): implications for the origin of Os-isotope heterogeneities in podiform chromitites
- Reply to comments by Sengupta, Raith and Dasgupta on S. B. Bhattacharya and R. K. Kar (2002)
- Trace element mapping by LA-ICP-MS: assessing geochemical mobility in garnet
- Metasomatized lithospheric mantle beneath Turkana depression in southern Ethiopia (the East Africa Rift): geochemical and Sr–Nd–Pb isotopic characteristics
- In situ observations of bubble growth in basaltic, andesitic and rhyodacitic melts
- NanoSIMS mapping and LA-ICP-MS chemical and U–Th–Pb data in monazite from a xenolith enclosed in andesite (Central Slovakia Volcanic Field)
- Phosphorus-controlled trace element distribution in zircon revealed by NanoSIMS
- Hydroxyl in olivines from mantle xenoliths in kimberlites of the Siberian platform
- Electrical conductivity of orthopyroxene and plagioclase in the lower crust
- Chromite in komatiites: 3D morphologies with implications for crystallization mechanisms
- In situ Sr isotopic analyses of epidote: tracing the sources of multi-stage fluids in ultrahigh-pressure eclogite (Ganghe, Dabie terrane)
- Source components of the Gran Canaria (Canary Islands) shield stage magmas: evidence from olivine composition and Sr–Nd–Pb isotopes
- The stability and origin of sodicgedrite in ultrahigh-temperature Mg-Al granulites: a case study from the Gondwana suture in southern India
- Plagioclase in the Skaergaard intrusion. Part 1: Core and rim compositions in the layered series
- The Campanian Ignimbrite (southern Italy) geochemical zoning: insight on the generation of a super-eruption from catastrophic differentiation and fast withdrawal
- Melting of clinopyroxene + magnesite in iron-bearing planetary mantles and implications for the Earth and Mars
- Experimental calibration of a garnet–clinopyroxene geobarometer for mantle eclogites
- A case for hornblende dominated fractionation of arc magmas: the Chelan Complex (Washington Cascades)
- Melting phase relations of a mica–clinopyroxenite from the Milk River area, southern Alberta, Canada
- Shoshonite and sub-alkaline magmas from an ultrapotassic volcano: Sr–Nd–Pb isotope data on the Roccamonfina volcanic rocks, Roman Magmatic Province, Southern Italy
- The role of slab melting in the petrogenesis of high-Mg andesites: evidence from Simbo Volcano, Solomon Islands
- Evolution of the Taupo Volcanic Center, New Zealand: petrological and thermal constraints from the Omega dacite
- Multi-stage metasomatism of diamondiferous eclogite xenoliths from the Udachnaya kimberlite pipe, Yakutia, Siberia
- Hercynian, Pan-African, Proterozoic and Archean ion-microprobe zircon ages for a Betic-Rif core complex, Alpine belt, W Mediterranean – consequences for its P - T - t path
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