scispace - formally typeset
Search or ask a question
Topic

Granulite

About: Granulite is a research topic. Over the lifetime, 6763 publications have been published within this topic receiving 268925 citations.


Papers
More filters
Journal ArticleDOI
TL;DR: In this article, single zircon U−Pb and Pb-Pb ages and Nd isotope data for orthogneisses and metapelites collected around Lilongwe and farther south in the region around Blantyre and Zomba were reported.

109 citations

Journal ArticleDOI
TL;DR: In this paper, a granulite of igneous origin from the Kataragama klippe in southern Sri Lanka yielded discordant ion microprobe data that suggest emplacement of the protolith at 1770-1880 Ma.
Abstract: Controversy concerning the age of regional granulite-grade metamorphism in Sri Lanka stems from the fact that different isotopic systems apparently record different events. Published isotopic data show that zircons from igneous and sedimentary protoliths experienced considerable Pb-loss at 550 Ma and that new growth of zircon, monazite, rutile and garnet between $$539 \pm 6 and 608 \pm 3 Ma$$ probably dates near-peak metamorphic conditions. Upper concordia intercept ages between ~670 and ~1950 Ma for magmatic zircons from high-grade orthogneisses and charnockites date igneous emplacement and also support the occurrence of granulite metamorphism after ~670 Ma. A granulite of igneous origin from the Kataragama klippe in southern Sri Lanka yielded discordant ion microprobe data that suggest emplacement of the protolith at 1770-1880 Ma. Thus a Rb-Sr whole-rock age of $$1930 \pm 130 Ma$$ from the same suite is unlikely to reflect isotopic homogenization during granulite formation, and we interpret this and oth...

109 citations

Journal ArticleDOI
01 Apr 2000-Lithos
TL;DR: In this article, three high-pressure granulite samples given mineral-WR isochron ages of 1846±76, 1743±79 and 1752±30 Ma.

109 citations

Journal ArticleDOI
TL;DR: Granulite facies orthogneiss of the Arthur River Complex (ARC) at Milford Sound, western Fiordland records a complex Early Cretaceous magmatic and orogenic history for the Pacific Gondwana margin that culminated in the emplacement and burial of a dioritic batholith, the Western FIordland Orthognes (WFO) as mentioned in this paper.
Abstract: Granulite facies orthogneiss of the Arthur River Complex (ARC) at Milford Sound, western Fiordland records a complex Early Cretaceous magmatic and orogenic history for the Pacific Gondwana margin that culminated in the emplacement and burial of a dioritic batholith, the Western Fiordland Orthogneiss (WFO). Enstatite-bearing mafic to intermediate protoliths of the ARC and WFO intruded the middle to upper crust. The early deformation history of the ARC is preserved in the Pembroke Granulite, where two-pyroxene S1 assemblages that reflect P 750 °C were only patchily recrystallized during later deformation. S1 is cut by garnet-bearing, leucogabbroic to dioritic veins, which are cut by distinctive D2 fractures involving anorthositic veins and garnet–diopside–plagioclase-bearing reaction zones. These zones are widespread in the ARC and WFO and record conditions of P≈14 kbar and T >750 °C. Garnet–clinopyroxene-bearing corona reaction textures that mantle enstatite in both the ARC and WFO reflect Early Cretaceous burial by approximately 25 km of continental crust. Most of the ARC is formed from the Milford and Harrison Gneisses, which contain steeply dipping S4 assemblages that envelop the Pembroke Granulite and involve garnet, hornblende, diopside, clinozoisite, rutile and plagioclase, with or without kyanite. The P–T history of rocks in western Fiordland reflects pronounced Early Cretaceous convergence-related tectonism and burial, possibly related to the collision and accretion of island arc material onto the Pacific Gondwana margin.

108 citations

Journal ArticleDOI
TL;DR: In this article, it was shown that texturally unequilibrated high grade high-grade rocks which experienced no mineral reactions and remained devoid of free fluids during exhumation, like granulites or eclogites, are likely to represent isotopic relics.

108 citations


Network Information
Related Topics (5)
Metamorphism
18.3K papers, 655.8K citations
97% related
Zircon
23.7K papers, 786.6K citations
95% related
Continental crust
11.1K papers, 677.5K citations
94% related
Basalt
18.6K papers, 805.1K citations
93% related
Subduction
22.4K papers, 1.1M citations
92% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023126
2022301
2021177
2020203
2019148
2018142