.... Magmatism of this stage was of limited occurrence in the CAOD and did not produce alkali syenites, monzonite–syenites, and ores. At the same time, rocks with an age of 121.1 ± 1.3—115.5 ± 1.6 Ma are widespread in the large (120 km 2 ) Dzheltula ring massif of the Tyrkanda ore district, located east...

... )). 1 , shield base; 2 , cover rocks: I, Proterozoic sandstones and Cambrian limestones, II, Jurassic sandstones, III, Cretaceous sandstones; 3 , Mesozoic igneous rocks; 4 , faults; 5 , outlines of ore districts associated with Mesozoic alkaline magmatism: CAD, Central Aldan district; TD, Tyrkanda...

...V.G. Khomich; N.G. Boriskina Abstract Gold ore districts in the Siberian (North Asian) craton and bordering terranes have been studied. Studies showed the long duration of gold concentration processes (Early Cambrian to Late Mesozoic and Cenozoic) and the influence of structural geological...

.... Siberian Platform. Aldan granulite–gneiss zone: 1 , Early Archean blocks (Aldanides): Chg, Chuga; Gon, Gonam; Id, Idzhek; Ie, Iengra; Nm, Nimnyr; S, Seim; T, Timpton; Tr, Tyrkanda; 2 , Late Archean blocks, graben–synclinorium structures: F, Fedorovskii trough; Sun, Sunnagino; Un, Ungra graben; 3...

...-melange zones (am – Amga, kl – Kalar, tr – Tyrkanda); 7 – faults (dzh – Dzheltulak, ts – Taksakanda); 8 – thrusts; 9 – deposits and ore occurrences (1 – Kuranakhskoe, 2 – Ryabinovoe, 3 – El’kon group deposits, 4 – Lebedinskoe, 5 – Samolazovskoe, 6 – P. Pinigin, 7 – Kolchedannyi Utes; 8 – Ledyanoe; 9...

... metallogenic epoch are found in 14 ore districts and districts, which have a potential for hosting ore deposits: El’kon (U, Au, Mo), Kuranakh (Au), Lebedinsk (asbestos, fluorite, Au), Apsakan-Nagornensky (Au, Ag, Mo), Khaikta (Mo, Au), Solov’ev (Au, Sb), Kabakta (Au), Tyrkanda (Au, Mo, W), Gonam (Au, Mo, W...

... clusters and districts. The largest and most commercially important of them is the Central Aldan ore district, which is considered a regional ore-magmatic system (ROMS) within the Aldan Shield, a specific ore-magmatic province. The Aldan complex is a polychronous and polyfacies association composed...

... – Kalar mélange zone; tr – Tyrkanda mélange zone; mineragenic regions: UAR – Upper Amga; CAR – Central Aldan; TR – Tyrkanda; KKR – Ket–Kap. 1 – granite–greenstone terranes; 2 – tonalite–trondhjemite–gneiss terranes; 3 – granulite–orthogneiss terranes; 4 – granulite–paragneiss terranes; 5 – belts...

.... Two large blocks separated by the Tyrkanda fault zone are traditionally distinguished therein: Central Aldan and East Aldan. Granitoid orthogneisses are widespread among the rocks of the Central Aldan block, and varying quantities of primary sedimentary rocks are identified. The structural plan...

... of the shield from one side (Ket-Kap–Yuna and Tyrkanda magmatic provinces) and in its Center and in the northwest (Central Aldan, Upper Amga and Chara-Tokka magmatic provinces) from another, significantly differ in time its beginning: approximately 15 Myr ( Polin et al., 2022 ). This fact alone, if taken...

...L.V. Buzlukova; V.S. Shatsky; N.V. Sobolev Study has addressed xenoliths of the crustal rocks from the Zagadochnaya kimberlite pipe, in the Daldyn-Alakit diamondiferous district of the Yakutian kimberlite province. Most xenoliths are represented by garnet granulites (60% of the bulk of xenoliths...