Papers by Andrei Khudoley
Provenance of the Mesozoic Succession of Franz Josef Land (North‐Eastern Barents Sea): Paleogeographic and Tectonic Implications for the High Arctic
Tectonics
International Geology Review
Age and provenance of the Precambrian Middle Timan clastic succession: Constraints from detrital zircon and rutile studies
Precambrian Research, 2022
Itinerant Siberia during the Neoproterozoic
Detrital apatite Lu–Hf and U–Pb geochronology applied to the southwestern Siberian margin
Terra Nova, 2022
Tectonics of the Northern Part of Verkhoyansk and Olenek Fold Belts: Implication for Late Mesozoic – Early Cenozoic Evolution of Laptev Sea Region
Geological Society of America Abstracts with Programs, 2017
U-PB Detrital Zircon Signature of Neoproterozoic Rocks in Siberia: Implication for Tectonic Evolution and Paleocontinental Restorations
Devonian Paleogeography and Tectonics of Russian Arctic
Geosphere, 2021
This study presents new whole rock major and trace element, Sr-Nd isotopic, petrographic, and geo... more This study presents new whole rock major and trace element, Sr-Nd isotopic, petrographic, and geochronologic data for seven latest Permian (Changhsingian)–Late Triassic (Carnian) granitoid intrusions of the northwestern and northeastern Taimyr Peninsula in the Russian High Arctic. U-Pb zircon ages, obtained using secondary ion mass spectrometry (SIMS), sensitive high-resolution ion microprobe (SHRIMP), and laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS), define the crystallization age of the Taimyr intrusions studied as ranging from ca. 253 Ma to 228 Ma, which suggests two magmatic pulses of latest Permian–Early Triassic and Middle–Late Triassic age. Ar-Ar dating of biotite and amphibole indicate rapid cooling of the intrusions studied, but Ar-Ar ages of several samples were reset by secondary heating and hydrothermal activity induced by the Middle–Late Triassic magmatic pulse. Petrographic data distinguish two groups of granites: syenite–monzonites and grani...
International Geology Review, 2020
We report new results of a comprehensive study into Carboniferous-Early Permian granite magmatism... more We report new results of a comprehensive study into Carboniferous-Early Permian granite magmatism of the northern Taimyr Peninsula, Russia (southern part of the Kara Terrane). U-Pb zircon ages (SHRIMP and LA-ICP-MS) represent the crystallization ages of these intrusions and range from ca. 344.5 to 288.4 Ma, defining the onset of granite magmatism during the Early Carboniferous (Visean; ca. 344 Ma) and its termination in the Early Permian (Artinskian; ca. 288 Ma). Ar-Ar dating of micas and amphiboles indicates that Late Palaeozoic tectonic activity in northern Taimyr ceased during the Middle Permian (Roadian; ca. 272 Ma). Rb/Sr and Sm/Nd isotopic data from the same intrusions, show initial (87 Sr/ 86 Sr)i ratios of between 0.70288 and 0.71027, with εNd(t) values range between −3.3 and +3.1. The combined geochemical and isotopic compositions of the granites describe an affinity to peraluminous I-type granites, probably formed in an Andean-type active continental margin setting. Our new geochemical, isotopic, and geochronological data indicate the existence of a long-lived (ca. 56 Myr) Andean-type active continental margin along the southern edge of the Kara Terrane during the Late Palaeozoic. Furthermore, our study reveals a causal relationship between Late Palaeozoic magmatism across northern Taimyr and closure of the Uralian Ocean.
Nordensheld Archipelago is a relatively large cluster of islands in the eastern part of the Kara ... more Nordensheld Archipelago is a relatively large cluster of islands in the eastern part of the Kara Sea located north of the Taymyr Peninsula. Belonging to the Northern Taimyr tectonic domain of the Taimyr-Severnaya Zemlya fold-and-thrust belt, this area in Late Paleozoic represented southern part of the Kara Terrane. Samples were collected from outcrops across the Nordensheld Archipelago and shallow offshore wells in the close proximity to the archipelago and from offshore well located in Toll bay (eastern part of the Kara sea). Studied plutons are represented by coarse-to medium-grained biotite, two mica and hornblende-biotite granites. U-Pb dating of the granites yelled ages of ca. 334 and 326 Ma. The granitoids are high-to medium acidic, mainly calc-alkalic to alkali-calcic, ferroan and magnesian, metalumious and peraluminous. The U-Pb zircon age from the Toll Bay well is the first granite age obtained offshore within eastern part of the Kara Sea. Petrographic and geochemical features of the Nordensheld Archipelago and eastern Kara Sea Visean-Serpukhovian granites indicate their suprasubduction origin. This correlates well with data from Northern Taimyr and provides new evidence for the Uralian Ocean subduction magmatism within Taimyr-Severnaya Zemlya fold-and-thrust belt.
Norwegian Journal of Geology, 2020
We present a comprehensive study of Late Ordovician (Sandbian) granitic rocks from the southeaste... more We present a comprehensive study of Late Ordovician (Sandbian) granitic rocks from the southeastern part of October Revolution Island in the Severnaya Zemlya archipelago (Kara Terrane). U-Th-Pb zircon ionmicroprobe data and Ar-Ar biotite dating from two samples allow us to determine a crystallisation age for the intrusions at c. 457 Ma. Based on their geochemical and isotopic composition, the granites can be defined as I-type, suggesting island-arc magmatism development within Kara Terrane in the Late Ordovician. This arc magmatism may be correlated with the Mid-Late Ordovician early stage of the Caledonian Orogeny. The obtained data support a tectonic model proposing that the Kara Terrane represented a marginal part of Baltica during the Early to Middle Palaeozoic. Severnaya Zemlya and the northern part the Taimyr Peninsula together constitute the southern part of the Kara Terrane (North Kara terrane, Kara block) (Metelkin et al., 2005; Lorenz et al., 2008a, b; Drachev et al., 2011). A large part of this terrane is submerged beneath waters of the Kara Sea and therefore only available for geophysical study (Daragan-Suschova et al., 2013).
Meso-Neoproterozoic dolerite sills and dykes of the southeast margin of the Siberian Craton are c... more Meso-Neoproterozoic dolerite sills and dykes of the southeast margin of the Siberian Craton are commonly known as linked to the Sette-Daban LIP-related event (Ernst, 2014). They are localized in the Maya-Kyllakh zone which represent moderately deformed sedimentary cover of the craton. The mafic intrusions are numerous and variable in size, but the best studied are large sills up to 200 m thick. Smaller intrusions are identified to be related to the same magmatic event according to their appearance and structural position. There are several U-Pb and Sm-Nd isochron isotopic dates for the rocks of the Ulakhanbam complex, giving a range of values from 930 to 1000 Ma. Although there is an overlap of several dates within error, sills become younger westward from 974-1005 Ma in the east part of the study area to 932-946 Ma in its west part. Due to wide range of ages they likely represent at least 2 different magmatic events, although long-term event is possible as well. To resolve this issue, new accurate dates are needed. Chemical composition of mafic intrusions is not uniform also varying from east to west. The average Y, Zr, Nb, La, Ce, and Nd concentrations in the intrusions from the east part of the study area are approximately two times higher than in the western ones. The separation into two groups is also observed in triple discriminatory diagrams according to Sm, Ti, V, and Sc. However, εNd(T) values vary from 2.3 to 7.5 without clear correlation with chemical composition. Thus, the revealed patterns basically support interpretation with occurrence of two stages of magmatic activity, the first of which is characterized by enrichment of REEs and other elements.
Vestnik of Saint Petersburg University. Earth Sciences, 2019
Moscow University Bulletin. Series 4. Geology, 2016
Bitak Formation is located within Simferopol area. It is presented by badly sorted conglomerates.... more Bitak Formation is located within Simferopol area. It is presented by badly sorted conglomerates. Lithological description of conglomerates is given. New data about age of the clastic zircons are presented. The possible age of Formation is discussed. It is assumed that Bitak Formation is older than Late Bajocian volcanic rocks and is younger than deposits of Tavrik Formation ant it analogs. Bitak Formation was accumulated in the pull-apart basin. A few basins of the such type are detected in the Crimea. It is assumed that Bitak basin is located at the base of Middle Jurassic arc-island complex of Crimea.
International Geology Review, 2017
Identifying the cratonic affinity of Neoproterozoic crust that surrounds the northern margin of t... more Identifying the cratonic affinity of Neoproterozoic crust that surrounds the northern margin of the Siberian Craton (SC) is critical for determining its tectonic evolution and placing the Craton in Neoproterozoic supercontinental reconstructions. Integration of new U-Pb-Hf detrital zircon data with regional geological constraints indicates that distinct Neoproterozoic arc-related magmatic belts can be identified within the Taimyr orogen. Sedimentary rocks derived from 970 to 800 Ma arc-related suites reveal abundant Archean and Paleoproterozoic detritus, characteristic of the SC. The 720-600 Ma arc-related zircon population from the younger Cambrian sedimentary rocks is also complemented by an exotic juvenile Mesoproterozoic zircon population and erosional products of older arc-related suites. Nonetheless, numerous evidences imply that both arcs broadly reworked Siberian basement components. We suggest that the early Neoproterozoic (ca. 970-800 Ma) arc system of the Taimyr orogen evolved on the active margin of the SC and probably extended along the periphery of Rodinia into Valhalla orogen of NE Laurentia. We also suggest the late Neoproterozoic (750-550 Ma) arc system could have been part of the Timanian orogen, which linked Siberia and Baltica at the Precambrian/ Phanerozoic transition.
Detrital zircon (U-Th)/He ages from Paleozoic strata of the Severnaya Zemlya Archipelago: deciphe... more Detrital zircon (U-Th)/He ages from Paleozoic strata of the Severnaya Zemlya Archipelago: deciphering multiple episodes of Paleozoic tectonic evolution within the Russian High Arctic.
Geochemistry International, 2016
An attempt is made to compare discrimination diagrams of the first (mid-1980s) and second (early ... more An attempt is made to compare discrimination diagrams of the first (mid-1980s) and second (early 2010s) generations compiled using data for sedimentary successions of different ages. Our results suggest that the diagrams of different generations allow more or less correct discrimination only between the platform, rift, passive margin, and island arc settings. The data for collision sediments do not form separate fields in these diagrams.
The Structural Evolution and Tectonic Development of the Laptev Sea Region in Mesozoic and Cenozoic
72nd EAGE Conference and Exhibition incorporating SPE EUROPEC 2010, 2010
This study is based on the series of field works on Bel’kov Island (Eastern Laptev Sea region) an... more This study is based on the series of field works on Bel’kov Island (Eastern Laptev Sea region) and Khatanga Bay area (Western Laptev Sea region). It is widely known, that the Laptev Sea region is one of the remote and geologically complex areas of Russian Eastern Arctic. According to the existing seismic data, a number of large offshore sedimentary basins with significant proposed hydrocarbon potential, but very controversial in age and composition, were revealed on its shelf. No offshore wells were drilled there so far, thus all the information on the regional geology, is based on the very limited amount of marine seismic profiles and our knowledge on adjoining near-coastal areas. Here we are focusing on the problems of structural geology of the region studied. During the field works we have collected significant amount of structural-geological data, which allowed us to restore the main stages of structural/tectonic evolution of the Western and Eastern Laptev Sea region.
De Long Islands: sedimentary history and provenance
Egu General Assembly Conference Abstracts, May 1, 2014
The De Long Islands are an archipelago located in the East Siberian Sea, represent one of the few... more The De Long Islands are an archipelago located in the East Siberian Sea, represent one of the few exposures of the Neoproterozoic and Early Paleozoic rocks in this part of the Arctic Ocean, and therefore are a very important area for study. It consists of 5 islands: Jeannette, Henrietta, Bennett, Vil'kitsky and Zhokhov. Vil'kitsky and Zhokhov Islands are covered by Cenozoic basalts, therefore are not considered here, whilst the Paleozoic rocks of interest for this study outcrop on Jeannette, Henrietta and Bennett islands. Jeannette Island is the smallest, containing exposures of a highly deformed and tectonized sedimentary succession. This succession is represented by siltstones and argillites, with beds of gravel to cobble conglomerates. The defining characteristic of these deposits is the abundance of tuffaceous beds, along with volcanic pebbles within the conglomerates. On Henrietta Island, four different units have been identified. The oldest one is very similar to the rocks which outcrop across Jeannette Island. The second unit consists of sandstones with lenses and layers of polymictic conglomerates. The third unit is represented by red-colored sandstones, whilst the youngest unit comprises basalt flows of an assumed Middle Paleozoic age. Accordingly detrital zircons data the age of sedimentary succession of Henrietta and Jeannette islands is the Neoproterozoic. On Bennett Island, Cambrian and Ordovician strata mainly consist of carbonates with minor interbedded clastics. We determined U-Pb ages for detrital zircons from 4 samples, from Jeannette and Henrietta Islands. Three samples have similar age populations, although there are some variations in the abundance of each population. The samples are dominated by Neoproterozoic and Mesoproterozoic grains with distinct peaks at ca. 550, 660, 1000, 1150, 1450, 1665 Ma. The youngest sedimentary unit on Henrietta Island has a very different detrital zircon distribution. The 550 Ma zircon population prevails (60%), with additional smaller peaks are at 1190 Ma and 1695 Ma. The detrital zircons from two samples collected from the Lower Paleozoic interbedded clastic rocks of Bennett Island have been dated. The zircon age distributions are very similar to those from Jeannette and Henrietta islands. The spectrum of detrital zircons indicates that clastic detritus was derived from multiple sources, including the Grenvillian and Sveconorwegian orogens, as well as a Neoproterozoic ca. 570-550 orogen (Timanian?). This research was supported by RFBR grants 13-05-00700, 13-05-00943, research grant of Saint Petersburg State University and Grant of President of Russia for Young Scientist MK-2902.2013.5.
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Papers by Andrei Khudoley