Late Paleozoic potassic igneous rocks of the Adyrtor intrusions in the eastern Kyrgyz Tien Shan: geochemistry, isotope U-Pb zircon geochronology, and related W-Mo(-Cu-Au) mineralization

Late Palaeozoic potassic igneous rocks of the Molo‐Sarychat pluton in the eastern Kyrgyz Tien Shan: Geochemistry, U–Pb zircon geochronology and implications for related skarn‐porphyry Mo‐W‐Cu‐Au mineralization

“…During the Early Devonian to Late Carboniferous, the 'Nikolaev Line' represented a zone of intracontinental, possibly backarc rifting associated with a north-dipping subduction, whereas in the Late Carboniferous to Permian it was part of a larger continental collision structure between the Kazakhstan-Northern Tien Shan and Tarim microcontinents (Jenchuraeva, 2001). F I G U R E 1 Regional tectonic setting and the major Late Palaeozoic gold, tungsten and other deposits of the Tien Shan metallogenic belt ('Tien Shan Gold Belt') (modified after Biske & Seltmann, 2010;Biske et al, 2013;Kudrin et al, 1990;Seltmann & Porter, 2005;Seltmann et al, 2011Seltmann et al, , 2014Soloviev & Kryazhev, 2017Soloviev et al, 2024bSoloviev et al, , 2024cYakubchuk et al, 2005Yakubchuk et al, , 2012.…”

“…Mo(-W-Cu) to W-Au mineralization (Kudrin et al, 1990;Soloviev, 2011Soloviev, , 2015Soloviev et al, 2024bSoloviev et al, , 2024c. The Kensu W-Mo skarn and Cu-Mo-W-Au stockwork deposit and the Kumbel W-Cu skarn and Au-W stockwork deposit are the most significant among them (Soloviev, 2011(Soloviev, , 2015Soloviev et al, 2024c).…”

“…The Molo-Sarychat pluton is situated in the central-eastern part of the 'Nikolaev Line' (Figures 2 and 3) and intrudes Upper Devonian to Lower Carboniferous volcanic to sedimentary rocks, which, according to some authors (Verkholantsev et al, 1983), represent an equivalent to the stratigraphy of the Turuk Trough, a suture tectonic unit aligned with the 'Nikolaev Line' and distinguished in the more eastern segment of the Kyrgyz Tien Shan (Figures 2 and 3). F I G U R E 2 Tectonic setting of the Late Palaeozoic high-K calc-alkaline to shoshonitic series intrusions and associated W and other deposits and occurrences along the 'Nikolaev Line' (modified after Kröner et al, 2017;Kudrin et al, 1990;Jenchuraeva, 2001;Soloviev, 2015;Soloviev et al, 2024bSoloviev et al, , 2024c. limestones.…”

“…Despite their importance for understanding the tectonic and metallogenic evolution of the region, the age of these intrusions remains poorly constrained, with almost no relevant isotopic U-Pb zircon data obtained. Similarly, only limited data on trace element contents in the igneous rocks important for determining their tectonic setting has been published (Soloviev, 1993(Soloviev, , 2011(Soloviev, , 2015Soloviev et al, 2024bSoloviev et al, , 2024c.…”