Post-collisional strongly peraluminous granites

Higher Himalayan Crystalline(HHC) complex of the Sikkim Himalaya predominantly consists of high-grade pelitic migmatites.In this study,reaction textures,mineral/bulk rare earth elements (REE),trace element partition coefficients and trace element zoning profiles in garnet are used to demonstrate a complex petrogenetic process during crustal anatexis.With the help of equilibrium REE and trace element partitioning model,it is shown that strong enrichment of Effective Bulk Composition(EBC) is responsible for the zoning in garnet in these rocks.The data strongly support disequilibrium element partitioning and suggest that the anatectic melts associated with mafic selvedges are likely produced by disequilibrium melting because of fast melt segregation process.

Migmatite

Pelite

Disequilibrium

Anatexis

Trace element

Source

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Citations (0)

Mobilization of Gold as a Polymetallic Melt during Pelite Anatexis at the Challenger Deposit, South Australia: A Metamorphosed Archean Gold Deposit

Economic Geology (2002)

A. G. Tomkins

Anatexis

Pelite

Mobilization

10.2113/97.6.1249

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Citations (32)

On the valency state of radiogenic lead in zircon and its consequences

Chemical Geology (2008)

Jan D. Kramers Robert Frei M. Newville Bernd Kober Igor M. Villa

Radiogenic nuclide

Anatexis

Titanite

Pyroxene

Grossular

10.1016/j.chemgeo.2008.09.010

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Citations (66)

Anatexis of interlayered amphibolite and pelite at 10 kbar: effect of diffusion of major components on phase relations and melt fraction

Contributions to Mineralogy and Petrology (1995)

Kjell Petter Skjerlie Alberto E. Patiño Douce

Anatexis

Pelite

10.1007/s004100050113

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Citations (64)

Model systems for anatexis of pelitic rocks

Contributions to Mineralogy and Petrology (1977)

Alan Bruce Thompson John R. Algor

Liquidus

Solidus

Anatexis

Muscovite

Pelite

Migmatite

Cordierite

Metallogeny

Alkali feldspar

10.1007/bf00375575

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Citations (157)

The P–T History of Anatectic Pelites of the Northern East Humboldt Range, Nevada: Evidence for Tectonic Loading, Decompression, and Anatexis

Journal of Petrology (2013)

Benjamin W. Hallett Frank S. Spear

The migmatitic lower plate of the Ruby Mountains–East Humboldt Range (RM–EHR) metamorphic core complex of northeastern Nevada represents a deep section of the hinterland of the Sevier orogenic belt. New major and trace element (Zr-in-rutile, Ti-in-biotite) thermobarometry is aided by garnet zoning analysis and a thermodynamic modeling approach involving melt reintegration. The P–T history for rocks from the Winchell Lake nappe (WLN) is characterized by a phase of high-temperature, nearly isothermal, probably tectonic loading followed by decompression and melting during continued heating from ∼675 to ∼740°C. Rocks of the Lizzies Basin Block (LBB) below the emplacement fault for the WLN allochthon record no evidence of a nearly isothermal phase of tectonic loading and associated metamorphism. Hence a different P–T path characterized by more widespread melting during prograde heating and contraction is compiled for the LBB. Different interpretations are presented for the exhumation history and the context of partial melting in the WLN versus the LBB. Anatexis in pelites of the WLN occurred as a result of dehydration melting reactions that took place in a decompressional phase of the prograde P–T path, in contrast to dehydration melting during contraction in the LBB. The emplacement of the WLN must have been a significant event in the tectonic history of the RM–EHR. These results have important implications regarding the relationship between crustal thickening, syncontractional exhumation, and anatexis within continental orogenic systems.

Anatexis

Pelite

10.1093/petrology/egt057

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Citations (50)

The international mineralogical association

Earth-Science Reviews (1968)

Anatexis

Migmatite

Protolith

10.1016/0012-8252(68)90124-4

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