Abstract—Metasomatic alterations in cataclased granites of the Primorsky Complex PR₁ in the Southern Siberian Craton are represented by albitization and riebeckitization, accompanied by microclinization, dolomitization and completed by the formation of hydrothermal quartz–carbonate veins. Albitization, epidotization, and carbonatization are occurred in the host metavolcanics. Mineral parageneses and mineral thermometry data indicate the occurrence of hydrothermal–metasomatic processes in the temperature range from 400–500 to 200‒250°С. Calcite deposited at an early stage has values of δ¹³С –(3.2–3.3)‰ and δ¹⁸O +(8.3–9.4)‰, ferruginous dolomite δ¹³С –(1.6–1.9)‰ and δ¹⁸O +(10.6–11.1)‰. The calculated values of δ¹³C in CO₂ contained in the fluid from which calcite was deposited at 450°C (about –0.7 to 0.8‰) indicate marine carbonates as the source of CO₂; the calculated values of δ¹⁸O in a fluid in equilibrium with calcite (from +5.4 to +6.5‰) show that the fluid underwent isotopic exchange with magmatic silicate rocks at elevated temperatures and a low fluid-rock ratio. The initial (⁸⁷Sr/⁸⁶Sr)_t ratio in newly formed calcite (0.718087) and dolomite (0.712033) and εNd_T = –(7.3–8.2) indicate the leading role of an upper crustal source of material. The maximum U concentration (52 ppm on average) contains albite–biotite–magnetite schists at the contact with altered granites. The U concentrators in metasomatically altered rocks are the crichtonite group minerals, zircon, and thorite.

摘要—南西伯利亚克拉通地区滨海边疆区Primorsky Complex PR _1的崩塌花岗岩中的变质作用以阿尔特化和再贝克化作用为代表，伴随着微临床作用，白云石化作用，并通过热液石英-碳酸盐岩脉的形成而完成。在宿主超火山岩中发生了阿尔卡特化，epi化和碳化。矿物共生和矿物测温数据表明，在400-500至200-250°С的温度范围内，发生了热液-交代过程。沉积在早期阶段方解石δ的值¹³ С - （3.2-3.3）‰和δ ¹⁸ O +（8.3-9.4）‰，铁质白云石δ ¹³ С - （1.6-1.9）‰和δ ¹⁸O +（10.6-11.1）‰。δ的计算值¹³在COÇ ₂包含在从该方解石在450℃（约-0.7至0.8‰）表示海相碳酸盐如CO的源沉积在流体₂ ; 的δ的计算值¹⁸在流体中与方解石○在平衡（从5.4到6.5 +‰）表明，与在高温下岩浆硅酸盐岩石和低流体岩比流体后行同位素交换。初始（⁸⁷ SR / ⁸⁶ SR）_吨在新形成的方解石比（0.718087）和白云石（0.712033）和的εNd _Ť= –（7.3–8.2）表示上地壳物质来源的主导作用。最大铀浓度（平均52 ppm）包含与蚀变花岗岩接触的钠长石-黑云母-磁铁矿片岩。变质变质岩石中的U选矿厂是白长石类矿物，锆石和石。