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The Qinling Orogenic Belt (QOB), formed by the subduction and collision between the North China Block (NCB) and the South China Block (SCB), is a key area for exploring the tectonic process and timing of integration between the two blocks. A range of tectonic models have been proposed with regard to the subduction and collision of the QOB, but controversy in the timing and integration process still remain debatable, especially in the late Palaeozoic orogeny. The South Qinling Belt (SQB) is located between the Shangdan and Mianlue sutures, widely dispersed sediments outcropped in the SQB provide natural ground for the detrital zircon study, that could trace the sedimentary provenance and continental crustal evolution history, thus provide important evidence for the late Palaeozoic evolutionary processes in the QOB. In this study, we applied a detailed geochronological U‐Pb zircon dating of the Silurian, Devonian and Permian sedimentary rocks from the SQB. The result of the U‐Pb isotopic data shows distinct age populations at 439–474 Ma of the Silurian samples, ca. 400–490 Ma of the Devonian samples and 260–310 Ma of the Permian samples, respectively. By comparing the regional geochronological data, we sum up that the Silurian detrital zircons are mainly derived from the SQB and the northern margin of SCB (N‐SCB), the Devonian detrital zircon age populations are dominated by the North Qinling Belt (NQB) and SQB and the Permian sediments mainly stemmed from the southern margin of the North China Block (S‐NCB) and the NQB. A mutual age population of the Devonian sediments at ca. 400–490 Ma from the NQB constrains the closure of the Shangdan Ocean between the NCB and the SCB before the middle Devonian times. Ca. 260 ~ 380 Ma age population of the Permian sediments show similarities with the age data from the northern margin of the NCB, indicating an uplift event of NQB before the late Permian, and further constrains the closure of Mianlue ocean later than Permian times. [ABSTRACT FROM AUTHOR]

Covalent organic frameworks with tunable porous crystallinity and outstanding stability have exhibited fascinating pretreatment performance as ideal extraction media. Herein, the β‐ketoenamine‐linked TpPa‐1 synthesized by 1,3,5‐triformylphloroglucinol and paraphenylenediamine was employed as the absorbent for online micro‐solid phase extraction of trace bisphenols combined with high‐performance liquid chromatography detection. A series of characterizations indicated that the TpPa‐1 possessed large surface areas, high stability, and hydrophobicity. The main experimental parameters affecting the extraction efficiency were optimized in detail. Compared with four commercial sorbents, the TpPa‐1 exhibited superior enrichment capacity for extracting bisphenols. Under the optimum conditions, the established method demonstrated a wide linear range and high sensitivity with the limit of detection ranging from 0.05–0.06 μg/L. Furthermore, the developed method was successfully applied to determine bisphenols in plastic samples. Bisphenol A was actually detected in a transparent box with a concentration of 0.31 μg/g, and the recoveries of the four bisphenols in the plastic samples were 80.5–116% with the relative standard deviation less than 9.2%. Such performance was attributed to recognition affinity, including the π‐π affinity, hydrophobic effect, and hydrogen bond. These results demonstrated that TpPa‐1 possessed great potential to be an excellent pretreatment medium for online separation and analysis of trace analytes in complex samples. [ABSTRACT FROM AUTHOR]

The carbonaceous-siliceous-argillitic rock type uranium deposit in the Zoige area is located in the northeastern margin of the Tibetan Plateau, and has gained much attention of many geologists and ore deposit experts due to its scale, high grade and abundant associated ores. Because of the insufficient reliable dating of intrusive rocks, the relationship between mineralization and the magmatic activities is still unknown. In order to study this key scientific issue and the ore-forming processes of the Zoige uranium ore field, the LA-ICP-MS zircon U-Pb dating of magmatic rocks was obtained: 64.08±0.59 Ma for the granite-prophyry and ∼200 Ma for the dolerite. U-Pb dating results of uraninite from the Zoige uranium ore field are mainly concentrated on ∼90 Ma and ∼60 Ma. According to LA-ICP-MS U-Pb zircon dating, the ages for the dolerite, porphyry granite and granodiorite are 200 Ma, 64.08 Ma approximately and 226.5-200.88 Ma, respectively. This indicates that the mineralization has close relationship with activities of the intermediate-acidic magma. The ages of the granite porphyry are consistent with those uraninite U-Pb dating results achieved by previous studies, which reflects the magmatic and ore-forming event during the later Yanshanian. Based on the data from previous researches, the ore bodies in the Zoige uranium ore field can be divided into two categories: the single uranium type and the uranium with polymetal mineralization type. The former formed at late Cretaceous (about 90 Ma), while the latter, closely related to the granite porphyry, formed at early Paleogene (about 60 Ma). And apart from ore forming elemental uranium, the latter is often associated with polymetallic elements, such as molybdenum, nickel, zinc, etc. [ABSTRACT FROM AUTHOR]

The article presents a study which discusses metallogenic regularity of hydrothermal uranium deposits in the migmatite of the Kangdian Axis. It mentions that the uranium mineralization is found in the iron oxide copper gold deposit. It also reveals that spatial distribution of uranium mineralization is controlled by migmatite that related to ductile shear zones.

The article presents a study which discusses geological and geochemical evolution of forming of kalium-rich brine in Sichuan Basin in China. Topics discussed include effects of numerous distinct tectonic events on salt brine reservoir in Sichuan Basin, varied ion concentration of sea water due to sea water evaporation, occurrence of small amount of evaporites, and occurrence of celestite precipitate.

The article discusses the geological features and metallogenic process of the Erligou Gold Deposit, Sichuan Province, China. Topics discussed include presence of magmatic activities and favorable geographical setting for ore controlling; exposure of gold bearing quartz veins to groundwater; and display of toughness by the ore-bearing deposits in compression shear stress from different directions.

The article discusses the mineralization process of Huangjinping Gold Deposits in China. Topics discussed include testing of samples of trace elements such as quartz, pyrite and granitic mass; display of low rare earth elements pattern by auriferous pyrites; and formation of stable fracture surface by granite pluton under compressive stresses.

The article focuses on a study that investigates geochemical characteristics of rare earth elements (REE) of Baijintaizi gold deposit in Kang Ding County, Si Chuan Province, China. The study mentions that granite, silicide granite shows strongly negative Europium (Eu) anomaly whereas pyrite and quartz mineral of gold-bearing quartz vein in the deposit shows positive Eu anomalies. Also the study reveals that the deposit may be associated with deep magma.

The article discusses the research study conducted to examine the geological features and genesis of Scheelite Deposit in Pingtan, Chengbu County, Hunan Province, China. Topics discussed include exposure of magmatic rock, stratum, and ore structure, genesis of mineral deposits and tectonic fracture zone, and metasomatic deposit.

The article discusses a study that focuses on the results of Tibetan Mineral Resources Potential Assessment Project based on the analysis and research of multi-source information data of Nixiong and Jiangla skarn iron ore forecast in Gangdese magmatic arc in Tibet, China. Topics discussed include analysis of iron mineralization law; processing of geological, geophysicalCgeochemical data; and application of Prediction Auxiliary System of Geologic Volume Method in resource reserve estimation.

The article offers information on the mineralization process of the Changdagou Porphyry Copper Deposits in Dege, Sichuan Province in China. Topics discussed include the petrological and geochemical study of the porphyry pluton indicating the geochemical characteristics of the porphyry similar to the properties of the adakites, the ore-bearing pluton and granite porphyry consisting of mantle formed by magma, and hydrothermal fluids formed in the process of emplacement.

The article discusses the research study conducted to examine the geologic history of the iron oxide copper gold (IOCG) deposits in Southwestern China that was associated with polymetallic mineralization. It reveals the age of magmatic rocks and metallogenic epoch and the coupling relationship between polymetallic elements. It also reveals the ore-forming process including the volcanic sedimentation, grenville orogenic event, and superimposed mineralization.