The age and petrology of the Chimbadzi Hill Intrusion, NW Zimbabwe: first evidence for early Paleoproterozoic magmatism in Zimbabwe

Manyeruke, Tawanda D.; Blenkinsop, Thomas G.; Buchholz, Peter; Love, David W.; Oberthür, Thomas; Vetter, U.; Davis, Donald W.

doi:10.1016/j.jafrearsci.2004.12.003

Cited by 26 publications

(3 citation statements)

References 21 publications

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“…In the Tarim Craton, ca. 2.3 Ga magmatism from the Quanji massif is interpreted to have formed in a postcollisional extensional tectonic regime displaying a heterogeneous Nd-Hf isotopic compositions, while those from Heluositan Group are formed in continental rift with negative ε Nd(t) values (Zhang et al, 2007;Gong et al, 2014;He et al, 2018 (Tchameni et al, 2001;Manyeruke et al, 2004;Kullerud et al, 2006;French and Heaman, 2010;Kumar et al, 2012;Nilsson et al, 2013;Stepanova et al, 2015).…”

Section: Paleoproterozoic Evolution Of North Vietnammentioning

confidence: 99%

Early Paleoproterozoic magmatism in the Yangtze Block: Evidence from zircon U-Pb ages, Sr-Nd-Hf isotopes and geochemistry of ca. 2.3 Ga and 2.1 Ga granitic rocks in the Phan Si Pan Complex, north Vietnam

Zhao

Cawood

et al. 2019

Precambrian Research

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Our understanding of the early evolution of the Yangtze Block is limited by the sparsely dispersed nature of pre-Neoproterozoic exposures. New, integrated petrographic, zircon U-Pb age and Hf-Nd isotope analyses, and whole-rock geochemical data for early Paleoproterozoic granites in the Phan Si Pan Complex provides new insights into the evolution of the Yangtze Block as well as its role in the Pre-Nuna supercontinent. LA-ICP-MS zircon U-Pb dating of magmatic zircons from quartz monzonite and gneissic granite yielded 207 Pb/ 206 Pb ages of 2306 ± 12 Ma and 2096 ± 15 Ma, respectively. Zircons from the quartz monzonite have ε Hf(t) values ranging from-4.1 to-2.1, corresponding to T DM2 model ages of 3002-2890 Ma, whereas zircons in the gneissic granite have ε Hf(t) values between-0.95 and +1.72 and corresponding T DM2 model ages of 2660-2516 Ma, which are consistent with their whole-rock Nd isotope values. Geochemically, the quartz monzonites are I-type granites. Combined with their relatively high Sr/Y ratios and low Y concentrations, as well as fractionated REE patterns with relatively high LREE but low HREE concentrations, they were probably generated by partial melting of the thickened middle-lower crust under elevated temperature. Geochemical and isotopic signatures suggest that the ca. 2.1 Ga gneissic granites are high-K calc-alkaline, ferroan A-type granites formed by partial melting of juvenile crustal source at high temperature and low pressure with little involvement of ancient crustal material. The Phan Si Pan complex has a distinct early Paleoproterozoic crustal evolution history compared with the other crustal provinces of the Yangtze Block, suggesting independent histories that were not unified until the late Paleoproterozoic during the assembly of Nuna. Moreover, the magmatism and tectonic evolution of the north Vietnam region is broadly similar to that of the Arrowsmith Orogen of the Rae craton in Laurentia suggesting a potential spatial linkage. The geologic record of the Yangtze Block does not support an early Paleoproterozoic shutdown of plate tectonics.

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Section: Paleoproterozoic Evolution Of North Vietnammentioning

confidence: 99%

Early Paleoproterozoic magmatism in the Yangtze Block: Evidence from zircon U-Pb ages, Sr-Nd-Hf isotopes and geochemistry of ca. 2.3 Ga and 2.1 Ga granitic rocks in the Phan Si Pan Complex, north Vietnam

Zhao

Cawood

et al. 2019

Precambrian Research

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“…From the Chimbadzi Hill dyke troctolite that intruded into the Archaean basement near the Magondi Supergroup, baddeleyites were dated at 2,262 ± 2 Ma using U–Pb dating (Manyeruke et al, ). This age is considered coeval to that of basaltic volcanic rocks at the base of the Deweras Group (Manyeruke et al, ), but the direct contact between them has not been observed (Master et al, ; 2013). The Hurungwe Granite that intruded into the Pirwiri Group yielded a SHRIMP U–Pb zircon age of 1997.5 ± 2.6 Ma (McCourt, Hilliard, Armstrong, & Munyanyiwa, ).…”

Section: Geological Outlinementioning

confidence: 99%

“…Time constraints for the Magondi Supergroup are still not well established because of lack of intrusive igneous rocks or tuff layers. Although baddeleyites in troctolite from the Chimbadzi Hill dyke near the base of the Magondi Supergroup yielded a U–Pb age of 2,262 ± 2 Ma (Manyeruke et al, ), the direct contact between the troctolite and Magondi Supergroup is unclear (Master, Bekker, & Hofmann, ). In addition, there is no report to constrain ages of basement granitoids in the Lomagundi area.…”

Section: Introductionmentioning

confidence: 99%

Age constraints on the Palaeoproterozoic Lomagundi–Jatuli Event in Zimbabwe: Zircon geochronology of the Magondi Supergroup

Sawada

Mugandani²,

Sato

et al. 2019

Terra Nova

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The ca. 2.2–2.1 Ga Magondi Supergroup on the Zimbabwe Craton in Southern Africa is mainly composed of sedimentary rocks deposited in a rift basin/passive continental margin, which record a unique episode in carbon isotope perturbation called the Lomagundi–Jatuli Event (LJE). This study reports new U–Pb ages of detrital zircons from the Deweras and Lomagundi groups of the Magondi Supergroup, and of igneous zircons from underlying granitoids, to constrain the timing of the LJE and to identify the provenance of the Magondi Supergroup. Most analysed detrital zircon grains range in ages between ca. 2.9 and 2.6 Ga. Three ca. 2.3–2.2 Ga detrital zircons from sandstone of the Deweras Group, with the youngest 207Pb‐206Pb age of 2,216 ± 22 Ma, indicate the onset of LJE in the Zimbabwe Craton was almost simultaneous to that in Fennoscandia and the Superior Craton, supporting the global synchronicity of the LJE.

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The Precambrian Mafic Magmatic Record, Including Large Igneous Provinces of the Kalahari Craton and Its Constituents: A Paleogeographic Review

et al. 2018

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The age and petrology of the Chimbadzi Hill Intrusion, NW Zimbabwe: first evidence for early Paleoproterozoic magmatism in Zimbabwe

Cited by 26 publications

References 21 publications

Early Paleoproterozoic magmatism in the Yangtze Block: Evidence from zircon U-Pb ages, Sr-Nd-Hf isotopes and geochemistry of ca. 2.3 Ga and 2.1 Ga granitic rocks in the Phan Si Pan Complex, north Vietnam

Early Paleoproterozoic magmatism in the Yangtze Block: Evidence from zircon U-Pb ages, Sr-Nd-Hf isotopes and geochemistry of ca. 2.3 Ga and 2.1 Ga granitic rocks in the Phan Si Pan Complex, north Vietnam

Age constraints on the Palaeoproterozoic Lomagundi–Jatuli Event in Zimbabwe: Zircon geochronology of the Magondi Supergroup

The Precambrian Mafic Magmatic Record, Including Large Igneous Provinces of the Kalahari Craton and Its Constituents: A Paleogeographic Review

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The age and petrology of the Chimbadzi Hill Intrusion, NW Zimbabwe: first evidence for early Paleoproterozoic magmatism in Zimbabwe

Cited by 26 publications

References 21 publications

Early Paleoproterozoic magmatism in the Yangtze Block: Evidence from zircon U-Pb ages, Sr-Nd-Hf isotopes and geochemistry of ca. 2.3 Ga and 2.1 Ga granitic rocks in the Phan Si Pan Complex, north Vietnam

Early Paleoproterozoic magmatism in the Yangtze Block: Evidence from zircon U-Pb ages, Sr-Nd-Hf isotopes and geochemistry of ca. 2.3 Ga and 2.1 Ga granitic rocks in the Phan Si Pan Complex, north Vietnam

Age constraints on the Palaeoproterozoic Lomagundi–Jatuli Event in Zimbabwe: Zircon geochronology of the Magondi Supergroup

The Precambrian Mafic Magmatic Record, Including Large Igneous Provinces of the Kalahari Craton and Its Constituents: A Paleogeographic Review

Contact Info

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Early Paleoproterozoic magmatism in the Yangtze Block: Evidence from zircon U-Pb ages, Sr-Nd-Hf isotopes and geochemistry of ca. 2.3 Ga and 2.1 Ga granitic rocks in the Phan Si Pan Complex, north Vietnam

Early Paleoproterozoic magmatism in the Yangtze Block: Evidence from zircon U-Pb ages, Sr-Nd-Hf isotopes and geochemistry of ca. 2.3 Ga and 2.1 Ga granitic rocks in the Phan Si Pan Complex, north Vietnam