U–Pb chronology and geochemistry of detrital monazites from major African rivers: Constraints on the timing and nature of the Pan-African Orogeny

Itano, Keita; Iizuka, Tsuyoshi; Chang, Qing; Kimura, Jun–Ichi; Maruyama, Shigenori

doi:10.1016/j.precamres.2016.07.008

Cited by 52 publications

(29 citation statements)

References 183 publications

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“…The genesis of the detrital monazite can be well explained by the significant variation in the major element composition. The significant and independent variations in [Th/U] N , [Gd/Lu] N and [Eu/Eu*] N are the most striking geochemical feature of the detrital monazite (Itano, Iizuka, Chang, Kimura, & Maruyama, ). Below, we discuss the REE patterns and variations in [Th/U] N , [Gd/Lu] N and [Eu/Eu*] N to constrain the genesis of the detrital monazite.…”

Section: Discussionmentioning

confidence: 99%

“…90) in igneous rocks (Kelts, Ren, & Anthony, ). In contrast, monazite from metamorphic rocks commonly has moderate [Th/U] N values (<20; Itano et al, ).…”

Section: Discussionmentioning

confidence: 99%

“…The detrital monazite in this study is characterized by significant enrichment in LREEs over HREEs with a very steep negative trend. Owing to the higher distribution coefficients for HREEs in the coexistence minerals, the monazite can exhibit extreme HREE depletion (Itano et al, ). Garnet is the major repository of HREEs in metamorphic rocks and garnet growth reactions correspond to monazite breakdown and vice versa (Pyle, Spear, Rudnick, & McDonough, ; Yang & Rivers, ).…”

Section: Discussionmentioning

confidence: 99%

“…Garnet and monazite are commonly abundant in medium‐ to high‐grade metamorphic rocks (Štípská et al, ). It is therefore reasonable to expect that the detrital monazite that is highly depleted in HREEs ([Gd/Lu] N of >500) originated mainly from garnet‐bearing metamorphic rocks with typically medium to high grades (Itano et al, ). However, the growth of garnet and zircon is limited in low‐grade metamorphic rocks (Spandler, Hermann, Arculus, & Mavrogenes, ).…”

Section: Discussionmentioning

confidence: 99%

“…According to the variations in major element composition, we carried out the genetic classification of the monazite from the Ganchaigou and Dongchaishan‐Weitai sections. The detrital monazite was classified by the variation in major element composition after Itano et al (). Please see Table .…”

Section: Discussionmentioning

confidence: 99%

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Provenance analysis of detrital monazite, zircon and Cr‐spinel in the northern Tibetan Plateau: Implications for the Paleozoic tectonothermal history of the Altyn Tagh and Qimen Tagh Ranges

Wen

Wang

et al. 2019

Basin Research

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Sediment provenance studies have proven to be an effective method to extract the sediment provenance and tectonic process information recorded by detrital minerals. In this contribution, we conducted detrital monazite and zircon U‐Pb geochronology and detrital Cr‐spinel major element chemistry analyses on samples from the Qaidam Basin to reconstruct the spatial and temporal evolution of the Altyn Tagh Range and the Qimen Tagh Range in the northern Tibetan Plateau. Based on the significant variation in [Th/U]N, [Gd/Lu]N and [Eu/Eu*]N and the U‐Pb ages of the monazite and zircon, the South Altyn Tagh subduction‐collision belt and the North Qimen Tagh Range were, respectively, the main provenances of the Ganchaigou section and the Dongchaishan‐Weitai section in the Qaidam Basin in the Cenozoic. Paleozoic peak metamorphism, retrograde granulite‐facies metamorphism and amphibolite‐facies metamorphism in the South Altyn Tagh subduction‐collision belt were well recorded by the detrital monazite. In comparison, the detrital zircon is a better indicator of igneous events than detrital monazite. Synthesizing the detrital monazite, zircon and Cr‐spinel data, we concluded that the South Altyn Tagh Ocean and Qimen Tagh Ocean existed in the early Paleozoic and that the Altyn Tagh terrane and Qimen Tagh terrane experienced different Paleozoic tectonothermal histories. The collision between the Qaidam terrane and the Azhong terrane occurred at ca. 500 Ma. The Middle Ordovician was the key period of transformation from the collision‐induced compressional environment to an extensional environment in the area of the South Altyn Tagh Range. In the early Paleozoic, the Qimen Tagh area was characterized by the subduction of oceanic crust.

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Section: Discussionmentioning

confidence: 99%

“…90) in igneous rocks (Kelts, Ren, & Anthony, ). In contrast, monazite from metamorphic rocks commonly has moderate [Th/U] N values (<20; Itano et al, ).…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Provenance analysis of detrital monazite, zircon and Cr‐spinel in the northern Tibetan Plateau: Implications for the Paleozoic tectonothermal history of the Altyn Tagh and Qimen Tagh Ranges

Wen

Wang

et al. 2019

Basin Research

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Phanerozoic Morphotectonic Evolution of the Zimbabwe Craton: Unexpected Outcomes From a Multiple Low‐Temperature Thermochronology Study

et al. 2017

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The fragmentary Phanerozoic geological record of the anomalously elevated Zimbabwe Craton makes reconstructing its history difficult using conventional field methods. Here we constrain the cryptic Phanerozoic evolution of the Zimbabwe Craton using a spatially extensive apatite (U‐Th‐Sm)/He (AHe), apatite fission track (AFT), and zircon (U‐Th)/He (ZHe) data set. Joint thermal history modeling reveals that the region experienced two cooling episodes inferred to be the denudational response to surface uplift. The first and most significant protracted denudation period was triggered by stress transmission from the adjacent ~750–500 Ma Pan‐African orogenesis during the amalgamation of Gondwana. The spatial extent of this rejuvenation signature, encompassing the current broad topographic high, could indicate the possible longevity of an ancient topographic feature. The ZHe data reveal a second, minor denudation phase which began in the Paleogene and removed a kilometer‐scale Karoo cover from the craton. Within our data set, the majority of ZHe ages are younger than their corresponding AHe and AFT ages, even at relatively low eU. This unexpectedly recurrent age “inversion” suggests that in certain environments, moderately, as well as extremely, damaged zircons have the potential to act as ultra‐low‐temperature thermochronometers. Thermal history modeling results reveal that the zircon radiation damage accumulation and annealing model (ZRDAAM) frequently overpredicts the ZHe age. However, the opposite is true for extremely damaged zircons where the ZHe and AHe data are also seemingly incompatible. This suggests that modification of the ZRDAAM may be required for moderate to extreme damage levels.

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Tracing source and palaeo‐weathering conditions of quartzose sandstone in the Cretaceous Cambay Basin: A combined petrographical, geochemical and geochronological approach

Rajak,

Prabhakar,

Banerjee

2023

Geological Journal

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Based on detrital monazite dating, mineral chemistry of tourmaline and rutile, bulk rock geochemistry, modal analysis of petrographic and palaeocurrent data, this study tracks the source of quartzose sandstone within the Cretaceous succession of the Cambay Basin primarily to rocks within the Aravalli‐Delhi Fold Belt. Monazite geochronology shows predominant peaks around 506 ± 11 Ma, 905 ± 12 Ma and a minor peak at 750 ± 20 Ma, 1485 ± 30 Ma relating sediment sources to the Aravalli‐Delhi orogeny and Pan‐African orogeny. The petrographic modal analysis of the moderate‐to‐well‐sorted Himmatnagar Sandstone indicates at least 91% quartz, with minor feldspar and rock fragments. The mineral chemistry of tourmalines in Himmatnagar Sandstone matches with Li‐ and Ca‐poor granitoid, pegmatites, metapelites and quartz tourmaline rocks. The trace element content of rutiles in sandstones corresponds to metapelitic sources. Detrital monazite dates and mineral chemistry of tourmalines and rutiles pinpoint the sediment source to the South Delhi Supergroup of rocks. The dominance of rounded zircons and tourmalines and abraded quartz overgrowth in the Himmatnagar Sandstone indicate the recycling of sediments, possibly from the Marwar Supergroup. Palaeoclimatic proxies based on mineralogy and geochemistry, particularly, the high value (93–97) of mineralogical index alteration, indicate intense chemical weathering of the source rocks under humid climatic conditions. Therefore, the combination of factors, including the quartzo‐feldspathic source rocks, intense chemical weathering under humid climatic conditions and the recycling of sediments facilitated the formation of quartzose sandstone within the Himmatngar Sandstone in the Cambay Basin.

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U–Pb chronology and geochemistry of detrital monazites from major African rivers: Constraints on the timing and nature of the Pan-African Orogeny

Cited by 52 publications

References 183 publications

Provenance analysis of detrital monazite, zircon and Cr‐spinel in the northern Tibetan Plateau: Implications for the Paleozoic tectonothermal history of the Altyn Tagh and Qimen Tagh Ranges

Provenance analysis of detrital monazite, zircon and Cr‐spinel in the northern Tibetan Plateau: Implications for the Paleozoic tectonothermal history of the Altyn Tagh and Qimen Tagh Ranges

Phanerozoic Morphotectonic Evolution of the Zimbabwe Craton: Unexpected Outcomes From a Multiple Low‐Temperature Thermochronology Study

Tracing source and palaeo‐weathering conditions of quartzose sandstone in the Cretaceous Cambay Basin: A combined petrographical, geochemical and geochronological approach

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