This study presents new whole rock major and trace element petrographic and geochronological data for three Permian granitoid intrusions of the northeastern Taimyr Peninsula (Chelyuskin Peninsula). U-Pb zircon ages (SIMS SHRIMP) define the crystallization age of the studied Taimyr intrusions as ranging from ca. 282 to 255 Ma, suggesting two magmatic pulses of Early Permian and Middle Permian age. We propose the adakitic geochemical composition of the Permian granites indicate their formation as the result of post-collisional slab melting.

Sedimentological features of the Upper Cambrian–Middle Ordovician rocks exposed in eastern Taimyr in the Faddey Gulf area are discussed. The studied sections belong to the transitional facies zone located between the carbonate platform (Siberian Platform continuation) in the south and a relatively deep-water basin in the north. The studied deposits compose a genetically coherent sequence formed in the distal zone of the siliciclastic–carbonate ramp at a depth exceeding the storm wave base. The lower (Upper Cambrian–lowermost Ordovician) part of the sequence is represented by limestones, dolomitized carbonate siltstones, and sandstones with shale layers. The upper (Lower–Middle Ordovician) part of the studied interval is dominated by shales with thin layers of carbonate siltstones. The carbonate detritus was sourced from a shallow-water shelf located south of the studied sections. The siliciclastic admixture in carbonate siltstones and sandstones was sourced from an island in the northern part of the modern Siberian Platform. The sandy material was transported by storm bottom currents; the fine-grained particles, by surface currents and winds as particulates and suspension clouds in the bottom water. Carbonate sandstones with the typical turbidite sedimentary structures, common in the lower part of the section, were deposited by turbidity currents initiated by storms. At that time, a prominent break likely existed in the ramp profile. The predominant NE orientation of flute casts indicates the alongslope (or along the trough axis) transport of material by bottom currents. The ramp topography was leveled in the second half of the Early Ordovician and in the Middle Ordovician.

Diverse grain sizes and morphologies, chemical composition, and productive mineral associations of native Au from new mineralizations within two mineragenic areas (Mininsk–Bolshevik miogeocline, Shrenk–Faddeev accretionary) in Western and Central Taymyr, are indicative of a complex, multi-component composition of ore-forming systems and differences in the physical and chemical conditions of formation of gold ore mineralization. The obtained data on the characteristics of native Au, combined with peculiarities of the geological structure of the objects, suggest a significant gold ore potential of central sector of the Russian Arctic.

Eastern part of the Central Taimyr belt is composed of Precambrian rocks penetrated by granites of the Snezhnaya complex (845–825 million years) and later overlain by mid‐Neoproterozoic sin‐ postorogenic sedimentary deposits of the Stanovaya‐Kolosova Group. Two competing concepts on the Precambrian history of the belt are dis‐ cussed. The first suggests that by the middle of the Neoproterozoic amalgamation of various terrains formed the Cen‐ tral Taimyr microcontinent, which afterwards collided with Siberia in Vendian. 2) According to the second point of view, which is shared by the authors of this article, the belt was part of the Siberian craton from at least the Mesopro‐ terozoic, and there is no suture that would separate it from the South Taimyr belt. To our surprise, during the field work in the South‐Eastern part of the Central Taimyr belt near the proposed “Vendian sutura”, assumed by the first concept, we found a granite pluton (Pregradnaya massif) intruding clastic rocks of Stanovaya‐Kolosova Group. Such setting is quite uncommon for the belt and contradicted to publications, describing the mentioned clastic rocks to overlay the granites and contain their debris. Dating of the pluton confirmed the field observations – its SRIMP zircon age has proved to be 609±2 Ma, an unusually young for this region. The pluton is located in a wide deformation zone separating the Precambrian rocks (to the northwest) and the Paleozoic deposits (to the southeast). Two minor bodies of similar porphyritic granite were found in the same zone further to the southwest, and it seemed logical to assume that a chain of Vendian granites marks boundary deformation zone. However, their dating (843±6 и 840±5 Ma) showed that they belong to Snezhnaya complex. In this paper, we discuss two Neoproterozoic magmatic ‘flare‐ups’ in the Central Taimyr Belt, which are dated at 845–825 and 640–610 Ma. Both ‘flare‐ups’ are evidenced by K‐rich per‐ aluminous granite batholiths intruded the upper crust. It is most probable that each flare‐up was related to a collision event completing an independent cycle in the evolution of the active margin of the Siberian paleocontinent.

Eastern part of the Central Taimyr belt is composed of Precambrian rocks penetrated by granites of the Snezhnaya complex (845–825 million years) and later overlain by mid‐Neoproterozoic sin‐ postorogenic sedimentary deposits of the Stanovaya‐Kolosova Group. Two competing concepts on the Precambrian history of the belt are dis‐ cussed. The first suggests that by the middle of the Neoproterozoic amalgamation of various terrains formed the Cen‐ tral Taimyr microcontinent, which afterwards collided with Siberia in Vendian. 2) According to the second point of view, which is shared by the authors of this article, the belt was part of the Siberian craton from at least the Mesopro‐ terozoic, and there is no suture that would separate it from the South Taimyr belt. To our surprise, during the field work in the South‐Eastern part of the Central Taimyr belt near the proposed “Vendian sutura”, assumed by the first concept, we found a granite pluton (Pregradnaya massif) intruding clastic rocks of Stanovaya‐Kolosova Group. Such setting is quite uncommon for the belt and contradicted to publications, describing the mentioned clastic rocks to overlay the granites and contain their debris. Dating of the pluton confirmed the field observations – its SRIMP zircon age has proved to be 609±2 Ma, an unusually young for this region. The pluton is located in a wide deformation zone separating the Precambrian rocks (to the northwest) and the Paleozoic deposits (to the southeast). Two minor bodies of similar porphyritic granite were found in the same zone further to the southwest, and it seemed logical to assume that a chain of Vendian granites marks boundary deformation zone. However, their dating (843±6 и 840±5 Ma) showed that they belong to Snezhnaya complex. In this paper, we discuss two Neoproterozoic magmatic ‘flare‐ups’ in the Central Taimyr Belt, which are dated at 845–825 and 640–610 Ma. Both ‘flare‐ups’ are evidenced by K‐rich per‐ aluminous granite batholiths intruded the upper crust. It is most probable that each flare‐up was related to a collision event completing an independent cycle in the evolution of the active margin of the Siberian paleocontinent.

The Central Taimyr accretionary belt includes two granite-metamorphic terranes: Faddey and Mamont-Shrenk, which include the oldest igneous formations of the Taimyr folded area in the Arctic framing of the Siberian craton—granitoids and granite-gneisses with U–Pb zircon ages of 900–830 Ma. The [FeO*/(FeO* + MgO)]-enriched granitoids of these terranes are products of highly fractionated I-type magmas. This paper presents results of new petrographic, geochemical, geochronological, and paleomagnetic investigations of acid rocks from a volcanic-plutonic association (in the region of the Leningradskaya River) in the Faddey terrane in the northeastern Taimyr area. These rocks formed during the final stage of continent–island arc accretion and collision that occurred at approximately 870–820 Ma. We established that the studied rocks belong to a long granitoid belt extending from Mamont-Shrenk to Faddey terrane, where all the igneous bodies are deformed and oriented uniformly. The paleomagnetic pole we calculated differs significantly from the apparent polar-wander path interval of corresponding age for Siberia. The 33.8°±5.4° angular distance between the poles indicates that the formation of this volcanic-plutonic association took place at a significant distance from the Taimyr margin of the Siberian paleocontinent.

Uytenbogaardtite has been observed when examining the ores of the Konechnoe gold ore occurrence, West Taimyr, which is the first find for the entire Taimyr-Severnaya Zemlya region. It is associated with native gold (fineness 520–560‰), pyrite, and sphalerite. Sphalerite is characterized by Fe, Cd, Ag, and Cu impurities. Zinc is present in siderite. In the ores of the Konechnoe ore occurrence, there is also native gold of the early generation with sphalerite, the latter containing chalcopyrite lamellae and being in association with arsenopyrite, pyrite, and galena. The peculiar compositions of microinclusions and impurities in sphalerite and other minerals and the presence of accessory minerals, such as monazite and apatite, reflect the specific metallogenic and geochemical characteristics of the Minina-Bol’shevik structural-metallogenic zone and serve as indicators of the potential of the North Taimyr area in terms of gold, silver, zinc, copper, lead, cadmium, strontium, thorium, and lanthanides.