scholarly journals Provenance and Tectonic Implications of Sedimentary Rocks of the Paleozoic Chiron Basin, Eastern Transbaikalia, Russia, Based on Whole-Rock Geochemistry and Detrital Zircon U–Pb Age and Hf Isotopic Data

Minerals ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 279 ◽  
Author(s):  
Ludmila I. Popeko ◽  
Yulia N. Smirnova ◽  
Victor A. Zaika ◽  
Andrey A. Sorokin ◽  
Sergey I. Dril
Keyword(s):  
Siberian Craton ◽  
Detrital Zircon ◽  
Sedimentary Rocks ◽  
Source Area ◽  
Major And Trace Elements ◽  
Geochemical Data ◽  
Island Arcs ◽  
Isotopic Data ◽  
Tectonic History ◽  
Eastern Transbaikalia

The Chiron Basin extends along the southern periphery of the Siberian Craton and the western margin of the Mongol–Okhotsk Belt. Here, we present whole-rock geochemical data (major and trace elements and Sm–Nd isotopes) along with zircon U–Pb geochronology and Lu–Hf isotopic data from Paleozoic sedimentary rocks within the Chiron Basin to investigate their provenance and tectonic history. εNd(t) values of the siliciclastics rocks of the Khara–Shibir, Shazagaitui, and Zhipkhoshi formations vary from −17.8 to −6.6, with corresponding two-stage Nd model ages (tNd(C)) ranging from 2.56 to 1.65 Ga. Detrital zircon grains from these rocks are predominantly Archean, Paleoproterozoic, and Carboniferous–Devonian in age. The data suggest that the southern flank of the Siberian Craton is the only viable source area for Archean and Paleoproterozoic zircon grains with Hf model ages (tHf(C)) of >2.20 Ga. The majority of zircon grains from sandstones from the Khara–Shibir, Shazagaitui, and Zhipkhoshi formations are Devonian–Carboniferous in age. With respect to their Hf model ages, the zircon grains can be subdivided into two groups. The first group of Devonian–Carboniferous zircon grains is characterized by relatively old (mainly Paleoproterozoic) tHf(C) model ages of 2.25–1.70 Ga and the source was the southern margin of the Siberian Craton. The second group of Devonian–Carboniferous zircon grains is characterized by significantly younger (mainly Neoproterozoic) tHf(C) model ages of 1.35–0.36 Ga, which are consistent with a juvenile source, most likely eroded island arcs. Our data, show that sedimentary rocks of the Chiron Basin likely formed in a back-arc basin on the southern periphery of the Siberian Craton facing the Paleozoic Mongol–Okhotsk Ocean.

Provenance of Jurassic sedimentary rocks of south-central Quesnellia, British Columbia: implications for paleogeography

2004 ◽  
Vol 41 (1) ◽  
pp. 103-125 ◽  
Author(s):  
Nathan T Petersen ◽  
Paul L Smith ◽  
James K Mortensen ◽  
Robert A Creaser ◽  
Howard W Tipper
Keyword(s):  
Detrital Zircon ◽  
Middle Jurassic ◽  
Sedimentary Rocks ◽  
Source Area ◽  
Lower Jurassic ◽  
Early Jurassic ◽  
Late Triassic ◽  
Nd Isotopes ◽  
South Central ◽  
History Of

Jurassic sedimentary rocks of southern to central Quesnellia record the history of the Quesnellian magmatic arc and reflect increasing continental influence throughout the Jurassic history of the terrane. Standard petrographic point counts, geochemistry, Sm–Nd isotopes and detrital zircon geochronology, were employed to study provenance of rocks obtained from three areas of the terrane. Lower Jurassic sedimentary rocks, classified by inferred proximity to their source areas as proximal or proximal basin are derived from an arc source area. Sandstones of this age are immature. The rocks are geochemically and isotopically primitive. Detrital zircon populations, based on a limited number of analyses, have homogeneous Late Triassic or Early Jurassic ages, reflecting local derivation from Quesnellian arc sources. Middle Jurassic proximal and proximal basin sedimentary rocks show a trend toward more evolved mature sediments and evolved geochemical characteristics. The sandstones show a change to more mature grain components when compared with Lower Jurassic sedimentary rocks. There is a decrease in εNdT values of the sedimentary rocks and Proterozoic detrital zircon grains are present. This change is probably due to a combination of two factors: (1) pre-Middle Jurassic erosion of the Late Triassic – Early Jurassic arc of Quesnellia, making it a less dominant source, and (2) the increase in importance of the eastern parts of Quesnellia and the pericratonic terranes, such as Kootenay Terrane, both with characteristically more evolved isotopic values. Basin shale environments throughout the Jurassic show continental influence that is reflected in the evolved geochemistry and Sm–Nd isotopes of the sedimentary rocks. The data suggest southern Quesnellia received material from the North American continent throughout the Jurassic but that this continental influence was diluted by proximal arc sources in the rocks of proximal derivation. The presence of continent-derived material in the distal sedimentary rocks of this study suggests that southern Quesnellia is comparable to known pericratonic terranes.

scholarly journals Supplemental Material: Late Neoproterozoic to early Paleozoic paleogeographic position of the Yangtze block and the change of tectonic setting in its northwestern margin: Evidence from detrital zircon U-Pb ages and Hf isotopes of sedimentary rocks

2021 ◽  
Author(s):  
Bingshuang Zhao ◽  
Xiaoping Long ◽  
et al.
Keyword(s):  
Detrital Zircon ◽  
Tectonic Setting ◽  
Sedimentary Rocks ◽  
Detrital Zircons ◽  
Early Paleozoic ◽  
Yangtze Block ◽  
Isotopic Data ◽  
Northwestern Margin ◽  
Late Neoproterozoic

Supplementary Figure S1: Representative cathodoluminescence images of zircons from the northwestern Yangtze block samples; Supplementary Table S1: U–Pb dating results and in situ Lu–Hf isotopic data for detrital zircons from the northwestern Yangtze block samples.

Detrital zircon U–Pb and Hf isotopic data for meta-sedimentary rocks from the Heilongjiang Complex, northeastern China and tectonic implications

Lithos ◽  
2017 ◽  
Vol 282-283 ◽  
pp. 23-32 ◽  
Author(s):  
Chloe Yanlin Zhu ◽  
Guochun Zhao ◽  
Min Sun ◽  
Yigui Han ◽  
Qian Liu ◽  
...  
Keyword(s):  
Detrital Zircon ◽  
Sedimentary Rocks ◽  
Northeastern China ◽  
Isotopic Data ◽  
Tectonic Implications

New geological and paleomagnetic data from Siberian Craton and implications for the post 2 Ga global paleogeography

2020 ◽  
Author(s):  
Sergei Pisarevsky ◽  
Tatiana Donskaya ◽  
Dmitry Gladkochub
Keyword(s):  
North America ◽  
Siberian Craton ◽  
Building Blocks ◽  
Detrital Zircons ◽  
Paleomagnetic Data ◽  
Geochemical Data ◽  
Geological History ◽  
Northern Margin ◽  
Tectonic History ◽  
Final Assembly

<p>Siberian Craton is generally recognised as one of the building blocks of two supercontinents: Mesoproterozoic Nuna (Columbia) and Neoproterozoic Rodinia. Although the exact Siberian positions in Nuna and Rodinia are debated, most workers agree that the southern part of Siberia (hereafter in present day coordinates) has been located not too far from the northern margin of Laurentia (cratonic part of North America) between ca. 1600 Ma and ca. 700 Ma. New geochronological, paleomagnetic and geochemical data from the Siberian craton obtained in recent years improved our understanding of Siberian geological history comparing to previous reviews. The progress in global Precambrian paleogeography also contributed to a re-evaluation of the Siberian tectonic history. The compilation of Siberian paleomagnetic data suggests that after the final assembly of Siberian Craton and until Ediacaran time the craton mostly occupied the low- to moderate latitudes. Most of this time western, northern and eastern Siberian edges have been passive or active oceanic margins. The southern margin Siberian margin has been probably connected with some other continent. Using new geological and paleomagnetic data, in particular recent results of the detrital zircons distributions in Siberia, Laurentia and other ancient continents, we tested several paleogeographic reconstructions of this connection. We also propose a new model of the breakup of Siberia from the remnants of Rodinia and consequent opening of the Paleo-Asian Ocean.</p>

Geochronology, geochemistry, and tectonic implications of upper Silurian – Lower Devonian meta-sedimentary rocks from the Jiangyu Group in eastern Jilin Province, Northeast China

2018 ◽  
Vol 55 (5) ◽  
pp. 490-504 ◽  
Author(s):  
Zuo-Zhen Han ◽  
Hui Liu ◽  
Zhi-Gang Song ◽  
Wen-Jian Zhong ◽  
Chao Han ◽  
...  
Keyword(s):  
Northeast China ◽  
Sedimentary Rocks ◽  
Detrital Zircons ◽  
Jilin Province ◽  
Geochemical Data ◽  
Isotopic Data ◽  
Early Devonian ◽  
Northern Margin ◽  
The North ◽  
Two Samples

In this study, we present detrital zircon U–Pb ages and Hf isotopic data and whole-rock geochemical data from meta-sedimentary rocks of the Jiangyu Group in eastern Jilin Province (Northeast China) to constrain the late Silurian – Early Devonian tectonic evolution of the southeastern Xing’an–Mongolia Orogenic Belt. Two samples of the meta-sedimentary rocks from the Jiangyu Group yielded concordant ages ranging from 2926 to 415 Ma, and the youngest zircon populations of the two samples yielded weighted mean ages of 427 ± 3 and 426 ± 3 Ma, respectively. Combined with reliable published muscovite 40Ar-39Ar ages of 408 Ma from the overlying metamorphic ophiolitic mélange, these data indicate that the protoliths of the Jiangyu Group were deposited during the late Silurian – Early Devonian Era. A comparison of the U–Pb ages and Hf isotopic data for detrital zircons from northeastern Gondwana and the Jiangyu Group indicates a probable tectonic affinity. The whole-rock geochemical data indicate that the protoliths of the meta-sedimentary rocks from the Jiangyu Group were graywackes deposited in a continental arc setting. Based on the recognition of the early to middle Paleozoic subduction–accretion events along the eastern segment of the northern margin of the North China Craton (NCC), we infer that the subduction–accretion events may have occurred in the Yanbian area followed by one or more arc–continent collisions after the Early Devonian.

Detrital zircon U–Pb geochronology and geochemistry of late Neoproterozoic – early Cambrian sedimentary rocks in the Cathaysia Block: constraint on its palaeo-position in Gondwana supercontinent

2019 ◽  
Vol 156 (9) ◽  
pp. 1587-1604 ◽  
Author(s):  
Chen Xiong ◽  
Yaoling Niu ◽  
Hongde Chen ◽  
Anqing Chen ◽  
Chenggong Zhang ◽  
...  
Keyword(s):  
Western Australia ◽  
Detrital Zircon ◽  
Sedimentary Rocks ◽  
Source Rocks ◽  
Geochemical Data ◽  
Early Cambrian ◽  
Lhasa Terrane ◽  
Northern India ◽  
Cathaysia Block ◽  
Late Neoproterozoic

AbstractWe present updated U–Pb ages and Hf isotopic compositions of detrital zircons and whole-rock geochemical data to investigate the provenance and tectonic setting of late Neoproterozoic and early Cambrian sandstones from the Cathaysia Block, in order to offer new constraints on its tectonic evolution and its palaeo-position within the supercontinent. The source rocks for the studied sandstones were dominated by felsic–intermediate materials with moderate weathering history. U–Pb dating results show major populations atc. 2500 Ma, 1000–900 Ma and 870–716 Ma with subordinate peaks at 655–532 Ma, consistent with the global Neoarchean continental crust growth, assembly and break-up of Rodinia, and Pan-African Event associated with the formation of Gondwana. Zircon U–Pb ages and Hf isotopic data suggest that most derived from exotic terranes once connected to the Cathaysia Block. Using whole-rock geochemical analysis, it was determined that the studied sedimentary rocks were deposited in a passive continental margin and the Cathaysia and Yangtze blocks were part of the same continent; no Cambrian ocean existed between them. Compiling a detrital zircon dataset from Qiangtang, northern India, the Lhasa Terrane and Western Australia, the Cathaysia Block seems to be more similar to the Qiangtang and western part of the northern India margin, instead of having a direct connection with the Lhasa Terrane and Western Australia in the Gondwana reconstruction during the late Neoproterozoic and Cambrian eons.

scholarly journals Supplemental Material: Late Neoproterozoic to early Paleozoic paleogeographic position of the Yangtze block and the change of tectonic setting in its northwestern margin: Evidence from detrital zircon U-Pb ages and Hf isotopes of sedimentary rocks

2021 ◽  
Author(s):  
Bingshuang Zhao ◽  
Xiaoping Long ◽  
et al.
Keyword(s):  
Detrital Zircon ◽  
Tectonic Setting ◽  
Sedimentary Rocks ◽  
Detrital Zircons ◽  
Early Paleozoic ◽  
Yangtze Block ◽  
Isotopic Data ◽  
Northwestern Margin ◽  
Late Neoproterozoic

Supplementary Figure S1: Representative cathodoluminescence images of zircons from the northwestern Yangtze block samples; Supplementary Table S1: U–Pb dating results and in situ Lu–Hf isotopic data for detrital zircons from the northwestern Yangtze block samples.

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