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: H P Zeck M J Whitehouse
Publish Date: 1999/02/01
Volume: 134, Issue: 2-3, Pages: 134-149
Abstract
Ionmicroprobe analysis of zircons from an andalusitebearing orthogneiss within the major Alpujárride nappe complex in the central part of the Betic Cordilleras has yielded a Hercynian age of 285 ± 5 2σ Ma for euhedral rims interpreted as the magmatic age of the andalusitebearing biotite granite parent rock for the gneisses Zircon age zoning systematics suggest a Paleozoic sedimentation age for the parent material for the anatectic source rock Zircon cores represent several groups of ages 1 Archean c 27 Ga 2 Early Proterozoic 22–20 Ga 3 Middle Proterozoic 11–09 Ga 4 PanAfrican 08–05 Ga including a welldefined event at 612 ± 13 2σ Ma Paragenetic and textural relations indicate that gneissification took place during a highP 12–13 kbar lowT 450–500 °C collisional event during which the primary Alpine nappe pile was produced The second and final Alpine tectonometamorphic event led to reorganization of the primary nappe pile by extensional tetonics with coeval very fast rock uplift and cooling from c 8 to c 1 kbar and c 600 to 100 °C within the period 195–185 Ma The fast uplift/cooling stage was triggered by slab breakoff which is thought to have induced diapiric underplating by highT asthenospheric material This may have heated the collisional wedge causing thermal weakening which might have advanced the late stage fast uplift/cooling The Alpine events did not leave a zircon crystallization record The inherited Archean–PanAfrican zircon age pattern corresponds to that established for the Hercynian basement in central and southern Europe which is considered as reworked Gondwana crust Deeper levels of core complexes within the BeticRif belt thus belong to the preTriassic basement of the Tethyan realm BeticLigurian lithosphere and represent reworked material ultimately derived from Archean and Proterozoic rock complexes from the Gondwana crustal domain This study implies that thermobarometry of rock complexes which went through several phases of tectonometamorphic reworking may render ambiguous results if based upon field observations and petrography alone Zircon ionmicroprobe dating may provide additional constraints required to arrive at a feasible tectonometamorphic history that is PTt trajectory for such rock complexes
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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
- Immiscible separation of metalliferous Fe/ Ti-oxide melts from fractionating alkali basalt: P - T - f O2 conditions and two-liquid elemental partitioning
- 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
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