In situ zircon U–Pb and Lu–Hf isotope systematic on magmatic rocks: Insights on the crustal evolution of the Neoproterozoic Goiás Magmatic Arc, Brasília belt, Central Brazil

AbstractIn situ U–Pb and Hf analyses were used for crustal zircon xenocrysts from Triassic kimberlites exposed in the Rangnim Massif of North Korea to identify components of the basement hidden in the deep crust of the Rangnim Massif and to clarify the crustal evolution of the massif. The U–Pb age spectrum of the zircons has a prominent population at 1.9–1.8 Ga and a lack of Archaean ages. The data indicate that the deep crust and basement beneath the Rangnim Massif are predominantly of Palaeoproterozoic age, consistent with the ages of widely exposed Palaeoproterozoic granitic rocks. In situ zircon Hf isotope data show that most of the Palaeoproterozoic zircon xenocrysts have negative ϵHf(t) values (−9.7 to +0.7) with an average Hf model age of 2.86 ± 0.02 Ga (2σ), which suggests that the Palaeoproterozoic basement was not juvenile but derived from the reworking of Archaean rocks. Considering the existence of Archaean remanent material in the Rangnim Massif and their juvenile features, a strong crustal reworking event is indicated at 1.9–1.8 Ga, during which time the pre-existing Archaean basement was exhausted and replaced by a newly formed Palaeoproterozoic basement. These features suggest that the Rangnim Massif constitutes the eastern extension of the Palaeoproterozoic Liao–Ji Belt of the North China Craton instead of the Archaean Liaonan Block as previously thought. A huge Palaeoproterozoic orogen may exist in the eastern margin of the Sino-Korean Craton.

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Contrasting Sr Nd Hf isotope systematics in Early Jurassic magmatic rocks from the Lhasa terrane: Implications for the lithospheric architecture of the Lhasa terrane

Lithos ◽

10.1016/j.lithos.2021.106050 ◽

2021 ◽

pp. 106050

Author(s):

Li-E Gao ◽

Lingsen Zeng ◽

Haitao Wang ◽

Jiahao Gao ◽

Zhen Shang ◽

...

Keyword(s):

Early Jurassic ◽

Hf Isotope ◽

Lhasa Terrane ◽

Magmatic Rocks ◽

Isotope Systematics

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Archaean to Palaeoproterozoic crustal evolution of the Aravalli mountain range, NW India, and its hinterland: The U–Pb and Hf isotope record of detrital zircon

Precambrian Research ◽

10.1016/j.precamres.2011.03.005 ◽

2011 ◽

Vol 187 (1-2) ◽

pp. 155-164 ◽

Cited By ~ 70

Author(s):

Parampreet Kaur ◽

Armin Zeh ◽

Naveen Chaudhri ◽

Axel Gerdes ◽

Martin Okrusch

Keyword(s):

Detrital Zircon ◽

Hf Isotope ◽

Mountain Range ◽

Crustal Evolution ◽

Isotope Record

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Mafic magmatism associated with the Goiás magmatic arc in the Anicuns region, Goiás, central Brazil: Sm–Nd isotopes and new ID-TIMS and SHIMP U–Pb data

Journal of South American Earth Sciences ◽

10.1016/j.jsames.2003.11.001 ◽

2004 ◽

Vol 16 (7) ◽

pp. 599-614 ◽

Cited By ~ 34

Author(s):

Jorge Henrique Laux ◽

Márcio Martins Pimentel ◽

Elton Luiz Dantas ◽

Richard Armstrong ◽

Alan Armele ◽

...

Keyword(s):

Nd Isotopes ◽

Mafic Magmatism ◽

Magmatic Arc ◽

Central Brazil

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Dynamic Metasomatism: Stable Isotopes, Fluid Evolution, and Deformation of Albitite and Scapolite Metagabbro (Bamble Lithotectonic Domain, South Norway)

Geofluids ◽

10.1155/2018/9325809 ◽

2018 ◽

Vol 2018 ◽

pp. 1-22 ◽

Cited By ~ 3

Author(s):

Ane K. Engvik ◽

Heinrich Taubald ◽

Arne Solli ◽

Tor Grenne ◽

Håkon Austrheim

Keyword(s):

Stable Isotopes ◽

Chemical Evolution ◽

Metal Transport ◽

Ductile Deformation ◽

Crustal Evolution ◽

Fluid Type ◽

Isotopic Data ◽

Magmatic Rocks ◽

Stable Isotopic ◽

Magmatic Fluids

New stable isotopic data from mineral separates of albite, scapolite, amphibole, quartz, and calcite of metasomatic rocks (Bamble lithotectonic domain) give increased knowledge on fluid type, source, and evolution during metamorphism. Albite from a variety of albitites givesδ18OSMOWvalues of 5.1–11.1‰, while quartz from clinopyroxene-bearing albitite gives 11.5–11.6‰.δ18OSMOWvalues for calcite samples varies between 3.4 and 12.4‰and shows more consistentδ13C values of −4.6 to-6.0‰. Amphibole from scapolite metagabbro yields aδ18OSMOWvalue of 4.3 to 6.7‰andδDSMOWvalue of −84 to −50‰, while the scapolite givesδ18OSMOWvalues in the range of 7.4 to10.6‰. These results support the interpretation that the original magmatic rocks were metasomatised by seawater solutions with a possible involvement from magmatic fluids. Scapolitisation and albitisation led to contrasting chemical evolution with respect to elements like P, Ti, V, Fe, and halogens. The halogens deposited as Cl-scapolite were dissolved by albitisation fluid and reused as a ligand for metal transport. Many of the metal deposits in the Bamble lithotectonic domain, including Fe-ores, rutile, and apatite deposits formed during metasomatism. Brittle to ductile deformation concurrent with metasomatic infiltration illustrates the dynamics and importance of metasomatic processes during crustal evolution.

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Magma mixing revealed from in situ zircon U–Pb–Hf isotope analysis of the Muhuguan granitoid pluton, eastern Qinling Orogen, China: implications for late Mesozoic tectonic evolution

International Journal of Earth Sciences ◽

10.1007/s00531-013-0900-x ◽

2013 ◽

Vol 102 (6) ◽

pp. 1583-1602 ◽

Cited By ~ 14

Author(s):

Rui Liu ◽

Jian-Wei Li ◽

Shi-Jian Bi ◽

Hao Hu ◽

Mi Chen

Keyword(s):

Tectonic Evolution ◽

Magma Mixing ◽

Isotope Analysis ◽

Hf Isotope ◽

Qinling Orogen ◽

Late Mesozoic ◽

Granitoid Pluton

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U–Pb Age and Hf Isotope Geochemistry of Detrital Zircons from Cambrian Sandstones of the Severnaya Zemlya Archipelago and Northern Taimyr (Russian High Arctic)

Minerals ◽

10.3390/min10010036 ◽

2019 ◽

Vol 10 (1) ◽

pp. 36 ◽

Cited By ~ 1

Author(s):

Victoria B. Ershova ◽

Andrei V. Prokopiev ◽

Andrey K. Khudoley ◽

Tom Andersen ◽

Kåre Kullerud ◽

...

Keyword(s):

Detrital Zircon ◽

Isotope Geochemistry ◽

High Arctic ◽

Detrital Zircons ◽

Hf Isotope ◽

Magmatic Arc ◽

Novaya Zemlya ◽

Late Neoproterozoic ◽

Severnaya Zemlya ◽

Severnaya Zemlya Archipelago

U–Pb and Lu–Hf isotope analyses of detrital zircons collected from metasedimentary rocks from the southern part of Kara Terrane (northern Taimyr and Severnaya Zemlya archipelago) provide vital information about the paleogeographic and tectonic evolution of the Russian High Arctic. The detrital zircon signatures of the seven dated samples are very similar, suggesting a common provenance for the clastic detritus. The majority of the dated grains belong to the late Neoproterozoic to Cambrian ages, which suggests the maximum depositional age of the enclosing sedimentary units to be Cambrian. The εHf(t) values indicate that juvenile magma mixed with evolved continental crust and the zircons crystallized within a continental magmatic arc setting. Our data strongly suggest that the main provenance for the studied clastics was located within the Timanian Orogen. A review of the available detrital zircon ages from late Neoproterozoic to Cambrian strata across the wider Arctic strongly suggests that Kara Terrane, Novaya Zemlya, Seward Peninsula (Arctic Alaska), Alexander Terrane, De Long Islands, and Scandinavian Caledonides all formed a single tectonic domain during the Cambrian age, with clastics predominantly sourced from the Timanian Orogen.

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