The Big Naryn Complex (BNC) in the East Djetim-Too Range of the Kyrgyz Middle Tianshan block is a tectonized, at least 2 km thick sequence of predominantly felsic to intermediate volcanic rocks intruded by porphyric rhyolite sills. It overlies a basement of metamorphic rocks and is overlain by late Neoproterozoic Djetim-Too Formation sediments; these also occur as tectonic intercalations in the BNC. The up to ca. 1100 m thick Lower Member is composed of predominantly rhyolites-to-dacites and minor basalts, while the at least 900 m thick pyroclastic Upper Member is dominated by rhyolitic-to-dacitic ignimbrites. Porphyric rhyolite sills are concentrated at the top of the Lower Member. A Lower Member rhyolite and a sill sample have LA-ICP-MS U–Pb zircon crystallization ages of 726.1 ± 2.2 Ma and 720.3 ± 6.5 Ma, respectively, showing that most of the magmatism occurred within a short time span in the late Tonian–early Cryogenian. Inherited zircons in the sill sample have Neoarchean (2.63, 2.64 Ga), Paleo- (2.33–1.81 Ga), Meso- (1.55 Ga), and Neoproterozoic (ca. 815 Ma) ages, and were derived from a heterogeneous Kuilyu Complex basement. A 1751 ± 7 Ma ⁴⁰Ar/³⁹Ar age for amphibole from metagabbro is the age of cooling subsequent to Paleoproterozoic metamorphism of the Kuilyu Complex. The large amount of pyroclastic rocks, and their major and trace element compositions, the presence of Neoarchean to Neoproterozoic inherited zircons and a depositional basement of metamorphic rocks point to formation of the BNC in a continental magmatic arc setting.

吉尔吉斯斯坦中天山地块东达捷姆-太山脉的大纳林综合体（BNC）是构造化的，至少2 km厚的层序，主要是由斑状流纹岩基岩侵入的长英质到中层火山岩。它覆盖在一个变质岩的基底上，并被新元古代晚期的Djetim-Too组沉积物所覆盖。这些也以构造插层形式出现在BNC中。最多约。1100 m厚的下部主要由流纹岩-达科石和次要玄武岩组成，而至少900 m厚的热碎屑上部则主要由流纹岩-山西到火成岩。卟啉流纹岩门槛集中在下半部的顶部。低级流纹岩和窗台样品的LA-ICP-MS U–Pb锆石结晶年龄分别为726.1±2.2 Ma和720.3±6.5 Ma，表明大多数岩浆作用发生在短时期的晚Tonian至早Cryogenian。窗台样品中继承的锆石具有新时代（2.63、2.64 Ga），古时代（2.33–1.81 Ga），中观（1.55 Ga）和新元古代（约815 Ma）年龄，并来源于异质的Kuilyu Complex地下室。 。1751年±7 Ma来自变生物的闪石的⁴⁰ Ar / ³⁹ Ar年龄是Kuilyu复合体古元古代变质之后的冷却年龄。大量的火山碎屑岩及其主要和微量元素组成，从新元古代到新元古代的锆石的存在以及变质岩的沉积基底都表明在大陆岩浆弧环境中形成了BNC。