The south margin of the central Altyn is an early paleozoic tectonic unit confirmed by Zircon dating evidence.

ABSTRACT: The south margin of Central Altyn (SMCA) has long been considered as Precambrian stratigraphic unit of the Altyn Orogen. However, their strata attribution is subjected to challenge by the new finding of Siluran-Devonian metamorphic rocks. Aiming to further understand the geological evolution of the SMCA and its relations with the adjacent tectonic units, here we investigate the metasedimentary, metamafic and metagranitic rocks and in turn to re-examine the tectonic characteristics of the region. Detrital zircons from six metasedimentary rocks hold a sharp peak of ~ 452 Ma and moderate peak of 800-1600 Ma, whose spectra characteristics are similar to those of extensional basins formed under subduction setting of active continental margins. Two metamafic rocks and one metagranitic rock obtai

SUBMITTER: Ma T 

PROVIDER: S-EPMC11842779 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature