The Tethyan Himalayan detrital record shows that India–Asia terminal collision occurred by 54 Ma in the Western Himalaya

Najman, Yani; Jenks, Daniel A.; Godin, Laurent; BouDagher‐Fadel, Marcelle; Millar, Ian L.; Garzanti, Eduardo; Horstwood, Matthew; Bracciali, Laura

doi:10.1016/j.epsl.2016.11.036

Cited by 178 publications

(103 citation statements)

References 41 publications

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“…India Asia collision date is also being predicted by exchange of the characteristic detrital zircons both from northern Tethys Himalayan and southern Himalayan foreland basin (DeCelles et al, 2004;Ding, Kapp, & Wan, 2005;Najman, 2006;Najman et al, 2010;Najman et al, 2017).…”

Section: Discussionmentioning

confidence: 99%

“…Tectonostratigraphy as well as major orogenic events of the Himalaya is being explained by provenance analysis with detrital zircon age and geochemistry (Ahmad et al, ; DeCelles et al, ; DeCelles et al, ; Khanal, Robinson, Mandal, & Simkhada, ; Mandal et al, ; Mandal, Robinson, Khanal, & Das, ; Martin, DeCelles, Gehrels, Patchett, & Isachsen, ; McQuarrie et al, ; Myrow et al, ; Parrish & Hodges, ; Sakai, Takigami, Nakamuta, & Nomura, ; Tobgay, Long, McQuarrie, Ducea, & Gehrels, ). India Asia collision date is also being predicted by exchange of the characteristic detrital zircons both from northern Tethys Himalayan and southern Himalayan foreland basin (DeCelles et al, ; Ding, Kapp, & Wan, ; Najman, ; Najman et al, ; Najman et al, ).…”

Section: Discussionmentioning

confidence: 99%

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Detrital geochronology of the Gondwana sequence of the Lesser Himalaya of the Nepal Himalaya

Bhandari

Xiao

et al. 2018

Geological Journal

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Detrital age relationship between major lithounits of the orogeny and foreland basin strata can elucidate orogenic events. However, analyses of some selected samples of a certain time interval from a sedimentary basin can lead to misjudgement. We present detrital zircon U–Pb age analyses of some older sedimentary strata of the Tansen Group, a renowned basin for the explanation of the Himalayan Orogeny. Sandstone and tuff samples of the Permian and Cretaceous Periods from the Gondwana sequence of the Lesser Himalaya of eastern Nepal and western Nepal were subjected to U–Pb age analyses, and the results were compared with available younger strata of the same basin along with the major lithotectonic units of the Himalaya. The detrital zircon age population of different units enables us to propose a new stratigraphic framework for the eastern Nepal Gondwana sequence and correlate them with the well‐established Gondwana sequence of the western Nepal Lesser Himalaya. This study reveals that the source region for the Gondwana sequence (Permian to Cretaceous) and post‐Gondwana sequence (Eocene to Miocene) is alternating and casts doubt upon the famous implications for the India and Asia collision and metamorphic core exhumation made from the basin analysis of these sedimentary basins of the southern part of the Himalayan Thrust Fold Belt (HTFB). Furthermore, we argue that these basins cannot be used for the reconstruction of collision and exhumation history of the Himalaya as being used. Alternatively, the results are more consistent with the possibilities of recent unconventional hypotheses of sediment contribution of the Greater Himalaya to the Permian strata of the Lesser Himalaya and the Cretaceous rifting of the Tibetan–Himalayan Microcontinent followed by the accretion of the microcontinent before collision of India and Asia.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Detrital geochronology of the Gondwana sequence of the Lesser Himalaya of the Nepal Himalaya

Bhandari

Xiao

et al. 2018

Geological Journal

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“…, ). Najman et al () used detrital zircon U–Pb with Hf data to constrain the timing of terminal India–Asia collision at ~54 Ma. Together with this study, the syntheses of geochronological, geochemical, and isotopic data suggest that the initiation of the India–Eurasia collision should be constrained at ~55 Ma in the Tengchong terrane.…”

Section: Discussionmentioning

confidence: 99%

Mineralogy, zircon U–Pb–Hf isotopes, and whole‐rock geochemistry of Late Cretaceous–Eocene granites from the Tengchong terrane, western Yunnan, China: Record of the closure of the Neo‐Tethyan Ocean

et al. 2017

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New data from mineralogy, geochemistry, zircon U–Pb dating, and Hf isotopes have revealed Late Cretaceous to Eocene magmatic intrusions in the Tengchong terrane and constrained the origin, tectonic setting, and characteristics of tin‐bearing and barren granitoids. We divide the studied granitoids into two groups: (a) the Late Cretaceous Zhinaxiang (70 Ma) and Early Paleocene Dazhupeng (65 Ma) S‐type barren granites and (b) the Eocene Lailishan A2‐type tin‐bearing granite (50 Ma). All these granitoids display Si‐ and K‐rich and calc‐alkaline characteristics and have similar chondrite‐normalized rare earth element patterns. However, geochemical differences do exist between the two groups of granites. The Zhinaxiang and Dazhupeng S‐type granites are slightly peraluminous, enriched in large‐ion lithophile elements (e.g., Rb and K), and depleted in high‐field‐strength elements (e.g., Nb, Ta, Zr, and Hf), whereas the Lailishan A2‐type granite has higher TFe2O3, high‐field‐strength element content, and Ga/Al ratios. The geochemical and Hf isotopic data indicate that the granites in this study were generated by partial melting of Paleoproterozoic metasedimentary rocks. Due to the subduction of the Neo‐Tethyan Ocean beneath the Eurasian plate, the Zhinaxiang and Dazhupeng S‐type granites were formed in a thickened‐crustal environment, whereas the Lailishan A2‐type granite was emplaced in a post‐collisional extensional setting attributed to slab break‐off. By comparison between tin‐bearing and barren granites, we propose that the Sn mineralization could be related to relatively high‐temperature and low‐pressure crystallization conditions.

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“…A provenance study of foreland basin sediments is a useful approach to reconstruct the evolution of orogens (DeCelles, Gehrels, Quade, LaReau, & Spurlin, ; Najman, ; Najman, Pringle, Godin, & Oliver, ; Najman et al, ; Zhang et al, ; Zhu, Zhao, Niu, Dilek, & Mo, ). In the Himalayan orogen, many provenance studies of the foreland sediments have been carried out to constrain the timing and diachroneity of the initial orogenesis (Ding, Kapp, & Wan, ; van Hinsbergen et al, ; DeCelles, Kapp, Gehrels, & Ding, ; Wang, Dai, et al, ; Wu et al, ).…”

Section: Introductionmentioning

confidence: 99%

Provenance of the Cenozoic Bengal Basin sediments: Insights from U–Pb ages and Hf isotopes of detrital zircons

et al. 2018

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The Bengal Basin is located in the foreland of the eastern Himalaya and records late Palaeocene to Pleistocene sedimentation. This makes the Bengal Basin an ideal place to study the evolution of the eastern Himalaya by provenance researches. Even though there have been several studies about its provenance, a consensus has not been reached about when the Himalayan and Gangdese‐derived detritus started to deposit in the eastern Himalayan foreland. Here, we study the provenance of Eocene to Pleistocene sedimentary successions of the Bengal Basin by detrital zircon U–Pb geochronology and Hf isotope analyses. Detrital zircon U–Pb age spectra show a predominant peak of ~470–580 Ma in all the samples. A peak at this time is prominent in sediments of the Tethyan Himalaya and Lesser Himalaya, which means the detritus eroded from Himalaya may have been deposited in the Bengal Basin after the late Palaeocene‐early Eocene, synchronous with detritus derived from the western and central Himalaya. Gangdese‐derived zircons were firstly recorded in the late Eocene Kopili Formation, and they were sporadic from the late Eocene to middle Miocene, which was probably due to the long distance between the Bengal Basin and the Lhasa Block, to the forebulge in the Lesser Himalayan Sequence, or to a wide tectonic separation at that time. The first influx of abundant Gangdese‐derived zircons occurred in the lower part of the Boka Bil Formation in the late Miocene (~10 Ma), which was probably caused either by the Brahmaputra River capturing the Yarlung Tsangpo River or by a much later terminal collision between India and Eurasia, or both.

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The Tethyan Himalayan detrital record shows that India–Asia terminal collision occurred by 54 Ma in the Western Himalaya

Cited by 178 publications

References 41 publications

Detrital geochronology of the Gondwana sequence of the Lesser Himalaya of the Nepal Himalaya

Detrital geochronology of the Gondwana sequence of the Lesser Himalaya of the Nepal Himalaya

Mineralogy, zircon U–Pb–Hf isotopes, and whole‐rock geochemistry of Late Cretaceous–Eocene granites from the Tengchong terrane, western Yunnan, China: Record of the closure of the Neo‐Tethyan Ocean

Provenance of the Cenozoic Bengal Basin sediments: Insights from U–Pb ages and Hf isotopes of detrital zircons

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