Age, provenance and Precambrian evolution of the Anabar shield from U-Pb and Lu-Hf isotope data on detrital zircons, and the history of the northern and central Siberian craton

2017 ◽  
Vol 301 ◽  
pp. 134-144 ◽  
Author(s):  
J.L. Paquette ◽  
Dmitri A. Ionov ◽  
A.M. Agashev ◽  
A. Gannoun ◽  
E.I. Nikolenko
Keyword(s):  
Siberian Craton ◽  
Detrital Zircons ◽  
Hf Isotope ◽  
Isotope Data ◽  
Anabar Shield ◽  
History Of

Pb, Nd, Sr isotopic composition of the Mesoproterozoic mafic intrusions (Udzha paleorift, Northern Siberia)

2020 ◽  
Author(s):  
Lidiia Shpakovich ◽  
Sergey Malyshev ◽  
Valeriy Savatenkov
Keyword(s):  
Isotopic Composition ◽  
Siberian Craton ◽  
Dyke Swarm ◽  
Mafic Dyke ◽  
Russian Science ◽  
Mafic Intrusions ◽  
Anabar Shield ◽  
History Of ◽  
Pb Isotopic Composition ◽  
Dyke Swarms

<p>Geodynamic reconstructions are largely based on information contained in mafic igneous rocks, including dykes and sills. The age and isotope-geochemical characteristics of such rocks are inevitable for understanding of geodynamic history of the Proterozoic cratons. The regions in Siberian Craton, where Precambrian mafic dyke swarms are known are following: Anabar Shield and Olenek Uplifts, Aldan-Stanovoi Shield, SE area of Siberian Craton, and smaller Uplifts on the SW margin of Siberian Craton.</p><p>The Udzha paleo-rift is located in the northern part of Siberian Craton between Anabar and Olenek Uplifts is also associated with mafic dyke swarm. These dykes cross-cut the pre-Neoproterozoic sedimentary successions. The age of the largest dyke in Udzha paleo-rift (Great Udzha Dyke) presented by medium-grained dolerite was determined to be 1386 ± 30 Ma (Malyshev et al., 2018).</p><p>We present new data of Sr, Nd and Pb isotopic composition on the Udzha paleo-rift dykes, determined by TIMS. The initial isotopic composition of Pb in the dykes was obtained using the leaching method by Savatenkov et al., 2019. The Sr isotopic composition of the dykes demonstrates substantial variation (εSr varies from 8.4 to 110.4). We do not consider this fact as a result of crust contamination, because Nd isotopic composition does not vary significantly (εNd varies from -1.4 to 0.7). Obtained results indicate that initial for the Udzha paleo-rift dykes melts were generated from two mantle reservoirs of DM and EMII-type. The initial Pb isotopic composition of the dykes reveals EMII source participation in the melts generation too (<sup>206</sup>Pb/<sup>204</sup>Pb varies from 16.133 to 16.266, <sup>207</sup>Pb/<sup>204</sup>Pb varies from 15.343 to 15.458). The presence of enriched component is likely associated with lithospheric mantle, metasomatized by fluids, derived from subducted terrigenous material.</p><p>The studies were supported by the Russian Science Foundation project No. 19-77-10048.</p><p>References</p><p>Malyshev, S. V., Pasenko A. M., Ivanov A. V., Gladkochub D. P., Savatenkov V. M., Meffre S., Abersteiner A., Kamenetsky V. S. & Shcherbakov V. D. (2018): Geodynamic Significance of the Mesoproterozoic Magmatism of the Udzha Paleo-Rift (Northern Siberian Craton) Based on U-Pb Geochronology and Paleomagnetic Data. – Minerals, 8(12), 555</p><p>Savatenkov V. M., Malyshev, S. V., Ivanov A. V., Meffre S., Abersteiner A., Kamenetsky V. S., Pasenko A. M. (2019): An advanced stepwise leaching technique for derivation of initial lead isotope ratios in ancient mafic rocks: A case study of Mesoproterozoic intrusions from the Udzha paleo-rift, Siberian Craton. – Chemical Geology, 528, 119253</p>

scholarly journals U–Pb ages and Hf-isotope data of detrital zircons from the late Neoarchean-Paleoproterozoic Minas Basin, SE Brazil

2017 ◽  
Vol 291 ◽  
pp. 143-161 ◽  
Author(s):  
Carmen I. Martínez Dopico ◽  
Cristiano Lana ◽  
Hugo S. Moreira ◽  
Lucas F. Cassino ◽  
Fernando F. Alkmim
Keyword(s):  
Detrital Zircons ◽  
Hf Isotope ◽  
Isotope Data ◽  
Se Brazil

Magmatic evolution of the ultramafic–mafic Kharaelakh intrusion (Siberian Craton, Russia): insights from trace-element, U–Pb and Hf-isotope data on zircon

2009 ◽  
Vol 159 (6) ◽  
pp. 753-768 ◽  
Author(s):  
Kreshimir Nenadovitch Malitch ◽  
Elena A. Belousova ◽  
William L. Griffin ◽  
Inna Yu Badanina ◽  
Norman J. Pearson ◽  
...  
Keyword(s):  
Trace Element ◽  
Siberian Craton ◽  
Hf Isotope ◽  
Magmatic Evolution ◽  
Isotope Data

Nature of magmatism and sedimentation at a Columbia active margin: Insights from combined U–Pb and Lu–Hf isotope data of detrital zircons from NW India

2013 ◽  
Vol 23 (3) ◽  
pp. 1040-1052 ◽  
Author(s):  
Parampreet Kaur ◽  
Armin Zeh ◽  
Naveen Chaudhri ◽  
Axel Gerdes ◽  
Martin Okrusch
Keyword(s):  
Detrital Zircons ◽  
Hf Isotope ◽  
Active Margin ◽  
Isotope Data

scholarly journals The missing link of Rodinia breakup in western South America: A petrographical, geochemical, and zircon Pb-Hf isotope study of the volcanosedimentary Chilla beds (Altiplano, Bolivia)

Geosphere ◽  
2020 ◽  
Vol 16 (2) ◽  
pp. 619-645 ◽  
Author(s):  
Heinrich Bahlburg ◽  
Udo Zimmermann ◽  
Ramiro Matos ◽  
Jasper Berndt ◽  
Nestor Jimenez ◽  
...  
Keyword(s):  
South America ◽  
Age Distribution ◽  
Limited Range ◽  
Detrital Zircons ◽  
Hf Isotope ◽  
Geochemical Data ◽  
Isotope Data ◽  
Final Assembly ◽  
Depositional Age ◽  
Southwestern Amazonia

Abstract The assembly of Rodinia involved the collision of eastern Laurentia with southwestern Amazonia at ca. 1 Ga. The tectonostratigraphic record of the central Andes records a gap of ∼300 m.y. between 1000 Ma and 700 Ma, i.e., from the beginning of the Neoproterozoic Era to the youngest part of the Cryogenian Period. This gap encompasses the time of final assembly and breakup of the Rodinia supercontinent in this region. We present new petrographic and whole-rock geochemical data and U-Pb ages combined with Hf isotope data of detrital zircons from the volcanosedimentary Chilla beds exposed on the Altiplano southwest of La Paz, Bolivia. The presence of basalt to andesite lavas and tuffs of continental tholeiitic affinity provides evidence of a rift setting for the volcanics and, by implication, the associated sedimentary rocks. U-Pb ages of detrital zircons (n = 124) from immature, quartz-intermediate sandstones have a limited range between 1737 and 925 Ma. A youngest age cluster (n = 3) defines the maximum depositional age of 925 ± 12 Ma. This is considered to coincide with the age of deposition because Cryogenian and younger ages so typical of Phanerozoic units of this region are absent from the data. The zircon age distribution shows maxima between 1300 and 1200 Ma (37% of all ages), the time of the Rondônia–San Ignacio and early Sunsás (Grenville) orogenies in southwestern Amazonia. A provenance mixing model considering the Chilla beds, Paleozoic Andean units, and data from eastern Laurentia Grenville sources shows that >90% of the clastic input was likely derived from Amazonia. This is also borne out by multidimensional scaling (MDS) analysis of the data. We also applied MDS analysis to combinations of U-Pb age and Hf isotope data, namely εHf(t) and 176Hf/177Hf values, and demonstrate again a very close affinity of the Chilla beds detritus to Amazonian sources. We conclude that the Chilla beds represent the first and hitherto only evidence of Rodinia breakup in Tonian time in Andean South America.

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