Topic
Terrane
About: Terrane is a research topic. Over the lifetime, 11025 publications have been published within this topic receiving 442596 citations. The topic is also known as: tectonostratigraphic terrane.
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TL;DR: In this paper, the authors used the UPb method to date ophiolites of the Yanbu suture (northwestern shield) of the Nabitah suture to approximately 740-780 Ma.
220 citations
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TL;DR: In this article, an integrated model of punctuated partial convective overturn of the upper and middle crust in response to dominantly magmatic processes is presented to explain the ca. 750 Myr history of the terrane.
220 citations
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TL;DR: In this paper, the authors proposed a model of polycyclic evolution of the Birimian orogenic belt, with a major collision event (D 1 ; 2.1 Ga) thrusting part of the Proterozoic terrane over the Archean before individualization of numerous volcanic troughs and clastic-infill basins.
220 citations
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TL;DR: The late Mesozoic granitoids widely distributed in the northwestern Jiaodong Terrane are important markers of cratonic destruction and lithospheric thinning of the eastern North China Craton.
219 citations
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TL;DR: In this article, the first significant detrital zircon data set from the Lhasa terrane of southern Tibet has been obtained, which provides new light on the tectonic and depositional history of the region.
Abstract: Sedimentary strata in the Lhasa terrane of southern Tibet record a long but poorly constrained history of basin formation and inversion. To investigate these events, we sampled Palaeozoic and Mesozoic sedimentary rocks in the Lhasa terrane for detrital zircon uranium-lead (U-Pb) analysis. The 4700 detrital zircon U-Pb ages reported in this paper provide the first significant detrital zircon data set from the Lhasa terrane and shed new light on the tectonic and depositional history of the region. Collectively, the dominant detrital zircon age populations within these rocks are 100-150, 500-600 and 1000-1400Ma. Sedimentary strata near NamCo in central Lhasa are mapped as Lower Cretaceous but detrital zircons with ages younger than 400Ma are conspicuously absent. The detrital zircon age distribution and other sedimentological evidence suggest that these strata are likely Carboniferous in age, which requires the existence of a previously unrecognized fault or unconformity. Lower Jurassic strata exposed within the Bangong suture between the Lhasa and Qiangtang terranes contain populations of detrital zircons with ages between 200 and 500Ma and
1700 and 2000Ma. These populations differ from the detrital zircon ages of samples collected in the Lhasa terrane and suggest a unique source area. The Upper Cretaceous Takena Formation contains zircon populations with ages between 100 and 160Ma, 500 and 600Ma and 1000 and 1400Ma. Detrital zircon ages from these strata suggest that several distinct fluvial systems occupied the southern
portion of the Lhasa terrane during the Late Cretaceous and that deposition in the basin ceased before 70Ma. Carboniferous strata exposed within the Lhasa terrane likely served as source rocks for sediments deposited during Cretaceous time. Similarities between the lithologies and detrital zircon age-probability plots of Carboniferous rocks in the Lhasa and Qiangtang terranes and Tethyan strata in the Himalaya suggest that these areas were located proximal to one another within Gondwanaland. U-Pb ages of detrital zircons from our samples and differences between the geographic distribution of igneous rocks within the Tibetan plateau suggest that it is possible to discriminate a southern vs.
northern provenance signature using detrital zircon age populations.
219 citations