AbstractWidespread granitic intrusions in the northeast part of Wulonggou area were previously thought to be emplaced into Palaeoproterozoic Jinshuikou Group during Neoproterozoic. This contribution presents detailed LA-ICP-MS zircon U–Pb geochronology, major and trace element geochemistry, Hf isotope systematic on Granodiorite Xiaoyakou Granite from area. Three granodiorite samples yielded ages 247 ± 2, 248 1, 249 1 Ma, one granite sample age 246 3 Ma. The are metaluminous with an alumina...

AbstractThe Dachang gold deposit is located in the Late Triassic Songpan-Ganzi Fold Belt, NE Tibetan Plateau. Gold ore concentrated as veins along secondary faults and fracture zones Bayan Har Group metaturbidites. No exposed felsic plutons are present vicinity of deposit. The auriferous contain <15% sulphide minerals, mainly arsenopyrite, pyrite, stibnite. commonly enclosed within arsenopyrite pyrite. Typical alteration around bodies includes silicification, sericitization, weak...

The Wulonggou area in the Eastern Kunlun Orogen (EKO) Northwest China is characterized by extensive granitic magmatism, ductile faulting, and orogenic gold mineralizations. Shidonggou granite located central part of area. This study investigated major as well trace-element compositions, zircon U–Pb dates, Hf isotopic compositions granite. Three samples yielded an average age 416 Ma (Late Silurian). Late Silurian peraluminous, with high alkali contents, Ga/Al ratios, (K2O + Na2O)/CaO...

Abstract The Great Xing'an Range (GXR), Northeast (NE) China, is a major polymetallic metallogenic belt in the eastern segment of Central Asian Orogenic Belt. newly discovered Xiaokele porphyry Cu (–Mo) deposit lies northern GXR. Field geological and geochronological studies have revealed two mineralization events this deposit: early porphyry‐type mineralization, later vein‐type mineralization. Previous yielded an age ca. 147 Ma for Our 40 Ar/ 39 Ar dating plateau ages 124.8 ± 0.4 to 124.3...

The Chaqiabeishan area is characterized by small Li-rich granitic pegmatites in the Quanji Massif (QM), northwest China. In this study, columbite-tantalite group minerals (CGMs) from a typical pegmatite dike were analyzed for major element contents using an EMPA (electron microprobe analyzer), trace LA-ICP-MS (laser ablation-inductively coupled plasma mass spectrometry), and ages U-Pb dating, respectively. CGMs sample can be divided into two types, i.e., magmatic Type 1 metasomatic 2....

To determine the appropriate welding heat input for simulated coarse grained affected zone (CGHAZ) of 800 MPa-grade steel used in hydropower penstocks, microstructural evolution, hardness, and 50% fraction appearance transition temperature (50% FATT) were investigated. The results indicated that when cooling rate (heat input) is reduced (increased), impact toughness at −20 °C hardness CGHAZ decreased. When increased from 18 to 81 kJ/cm, FATT −80 −11 °C. At microstructures consisted lath...

The Fukeshan Cu (Mo) deposit is a newfound porphyry in the northern Great Xing’an Range (GXR), northeast China. In this paper, we present results of chalcopyrite Re–Os geochronology, microthermometry fluid inclusions (FIs), and isotopic (H–O–S–Pb) compositions deposit. Its ore-forming process can be divided into sulfide-barren quartz veins (A vein; stage I), + pyrite (B II), polymetallic sulfide (D III), barren carbonate ± (E IV), with mineralization mainly occurred II. Three types FIs are...

Multi-stage igneous rocks developed in the recently discovered Huoluotai Cu-(Mo) deposit provide new insights into controversial late Mesozoic geodynamic evolution of northern segment Great Xing'an Range (NSGXR). Zircon U-Pb dating suggests that monzogranite, ore-bearing granodiorite porphyry, diorite and granite porphyry were emplaced at 179.5 ± 1.6, 148.9 0.9, 146.1 1.3, 142.2 1.5 Ma, respectively. The Re-Os molybdenite yielded an isochron age 146.9 2.3 Ma (MSWD = 0.27). Jurassic adakitic...

Granite-related hydrothermal Sn deposits are commonly expected to contain little or no Cu because and have markedly different geochemical properties. However, examples of rich in well-known many belts worldwide. So far, the magmatic processes ore-related rocks genesis Cu-rich remain controversial. The newly discovered Yuanlinzi Sn-Cu deposit is located southern Great Xing'an Range (SGXR), Northeast China. It a typical SGXR. This contribution reports new cassiterite zircon U-Pb ages,...

Geodynamic evolution in the late Paleozoic is significant for understanding final amalgamation of Central Asian Orogenic Belt (CAOB). No consensus has yet been reached regarding geodynamic northern Great Xing’an Range (GXR) northeastern China, eastern CAOB. Furthermore, syenogranite–diabase dyke association present Xiaokele area GXR. It provides an important opportunity to understand nature magmatism and during this period. This paper presents new zircon U–Pb ages, Hf isotopic compositions,...

The Chaqiabeishan area of the Quanji Massif in NW China is characterized by extensive Li‐rich pegmatites and granites various ages. In this study, major trace element compositions, U–Pb zircon ages, Hf isotopic compositions were investigated, including Garideng porphyritic monzogranite, Gongkaxiuma Narong granitic porphyry. Precise dating revealed that these three emplaced at approximately 468, 444, 245 Ma, respectively. geologic geochemical data indicate monzogranite porphyry are two I‐type...

The Hongshuihe area of Eastern Kunlun Orogen is well‐known for the BIF‐type deposits. Some widespread intrusive rocks in northern were previously thought to be emplaced Hercynian. This article presents LA‐ICP‐MS zircon U–Pb ages, with LA‐MC‐ICP‐MS situ Hf isotopes and major trace element data quartz diorites granites pluton. Two samples from diorite granite yielded a weighted mean age 244 ± 2 Ma (Anisian) 246 1 (Olenekian), respectively. subalkaline metaluminous alumina saturation index...

The Shenshuitan gold deposit is located within the Eastern Kunlun Orogen in northwest China. mineralization here occurs primarily ductile fault XI. sulfide mineral assemblage dominated by pyrite and arsenopyrite, with minor pyrrhotite, chalcopyrite, galena, sphalerite. Host rocks predominantly consist of Ordovician silicic slate late Silurian granites, their alterations include silicification sericitization. measured δD δ18O values quartz sericite range from −113.9‰ to −93.1‰ 4.6‰ 12.0‰,...

The Xiaokele Cu (–Mo) deposit is a newly discovered porphyry in the northern Great Xing'an Range (GXR) of northeast China. multiphase hydrothermal superposition on obscures temporal relationships between quartz veins/veinlets different mineralization stages, and consequently limits understanding origin evolution ore-forming fluids metal precipitation mechanism. In this study, we document detailed descriptions alteration vein mineral paragenesis deposit, present LA–ICP–MS zircon U–Pb...