Dataset of Major Elements and Isotopes of Longmen and Tangnaihai Hydrological Stations in the Yellow River (2012-2014)

The study of chemical weathering is of great significance to understand how the plateau uplift regulates the mechanism of climate change and the circulation of elements and materials in the sphere. The data set is the seasonal major element concentration and stable isotope data of the river water at the hydrological station of the Yellow River Basin originating from the Qinghai Tibet Plateau. There are two hydrological stations in total: 1. Longmen hydrological station in the middle reaches of the Yellow River is the high-resolution (weekly) sample data collected in 2013, and the element concentrations include K, CA, Na, Mg, SO4, HCO3, Cl, etc. The cation data of collected water samples are tested on ICP-AES of Institute of earth environment, Chinese Academy of Sciences, and the anion data are tested on ion chromatograph (ics1200) of Nanjing Institute of geography and lakes, Chinese Academy of Sciences. The uncertainty is within 5%, and HCO3 is tested by titration. The high-resolution (weekly) Li isotope data of river water was tested in MC-ICP-MS of Institute of earth environment, Chinese Academy of Sciences in 2017, and the test accuracy 2sd is better than 5 ‰; 2. Tangnaihai hydrological station on the Yellow River is the river water (month by month) data set collected from July 2012 to June 2014. The major element concentrations include K, CA, Na, Mg, SO4, HCO3, Cl, etc., and the stable isotope data include s, O and H. The data set can be used to study the modern weathering process under the background of the uplift of the Qinghai Tibet Plateau, and provides the first-hand reliable data for the study of physical erosion and chemical weathering in the basin.

0 2021-08-23

Data set of activation, migration and enrichment mechanism of rare earth elements during weathering and eluviation (2017-2021)

The data of this project after sampling and testing are as follows: (1) In 2017, bedrock core samples from 2 and 3 boreholes were collected from renju rare earth mining area in Guangdong Province. After mechanical crushing, slicing and single mineral selection, they passed the Key Laboratory of minerals and mineralization, Guangzhou Institute of geochemistry, Chinese Academy of Sciences, and Australian analytical testing (Guangzhou) testing company used X-ray powder diffractometer, X-ray fluorescence spectrometer and X-ray fluorescence spectrometer The mineral composition, iron oxide composition, whole rock chemical composition, mineral chemical composition, rare earth occurrence state and other data of 2 # and 3 # boreholes in renju rare earth deposit in Guangdong Province were measured by ICP-AES, visible short wave infrared reflectance spectroscopy and electron microscope; (2) In 2018, goethite samples were synthesized in the Key Laboratory of minerals and mineralization, Guangzhou Institute of geochemistry, Chinese Academy of Sciences. The phase, morphology and surface physicochemical properties of the synthesized samples were tested by X-ray fluorescence spectrometer, electron microscope, zeta potential analyzer and other instruments; The synthetic goethite was used to simulate the adsorption of rare earth ions. The concentration of rare earth ions was measured by inductively coupled plasma emission spectrometer to characterize the adsorption capacity and adsorption behavior of rare earth ions on the surface of goethite; The surface complexation model software visual MINTEQ was used to fit the adsorption data and determine the intrinsic adsorption constants of rare earth ions. (3) In 2018, kaolinite and halloysite samples were obtained in Maoming, Guangdong Province and Linfen, Shanxi Province, respectively. The phase, morphology and surface physicochemical properties of the samples were tested by X-ray powder diffraction, scanning electron microscopy, zeta potentiometry and other instruments; The adsorption capacity and behavior of rare earth ions on kaolinite and halloysite were characterized by ICP-AES. (4) In November 2018, 32 weathering profile samples of metamorphic rocks were collected in the ion adsorption rare earth mining area of metamorphic weathering crust in Ningdu County, Ganzhou City, Jiangxi Province. After mechanical crushing, slicing, chemical sequential extraction and whole rock acid dissolution experiments, the samples were passed through the Key Laboratory of minerals and mineralization, Guangzhou Institute of geochemistry, Chinese Academy of Sciences, Aoshi analytical testing (Guangzhou) Co., Ltd. uses X-ray powder diffraction, X-ray fluorescence spectrometer, inductively coupled plasma mass spectrometry, METTLER TOLEDO five easy plus ™ The mineral composition, chemical composition, pH value of soil erosion, thin section identification and SEM image data of ion adsorption type rare earth ore profile of metamorphic rock weathering crust were produced by testing with pH meter, optical microscope and electron microscope; (5) In 2021, the survey of rare earth ore was carried out in Dongyuan County, Guangdong Province, and the sampling work of 17 sections was completed. 62 samples were collected and the ion phase extraction and chemical analysis of 62 samples were carried out; The test and analysis can provide a theoretical basis for the enrichment, migration and mineralization of rare earth elements in weathering eluvial rare earth deposits.

0 2021-07-20

Chemical composition data set of Zhijin and Weng'an phosphate rocks in Guizhou

1) This data set includes chemical composition analysis of Xinhua Phosphorite (Early Cambrian) and Weng'an Phosphorite (Sinian) in Zhijin, Guizhou Province, China, including whole rock chemical composition of Zhijin and Weng'an phosphorite in Guizhou Province, whole rock Sr-Nd-Pb isotopic analysis data of Zhijin and Weng'an phosphorite in Guizhou Province, in-situ Sr isotopic analysis of apatite in Zhijin and Weng'an phosphorite in Guizhou Province, The purpose of this paper is to give the genesis and REE enrichment mechanism of phosphorites in Guizhou from the perspective of major and trace geochemistry and isotope geochemistry; 2) The whole rock chemical analysis was conducted by Aoshi analysis and testing (Guangzhou) Co., Ltd., the whole rock SR nd Pb isotope analysis was conducted by Guizhou Tongwei Test Technology Co., Ltd., and the apatite in situ Sr isotope analysis was conducted by Beijing Kehui Analysis Technology Co., Ltd; 3) The data set can well show the chemical composition and isotopic geochemical information of Zhijin phosphate rock and Weng'an phosphate rock in Guizhou; 4) This data is of great significance for a detailed understanding of the formation process and REE enrichment mechanism of Zhijin and Weng'an phosphate deposits in Guizhou.

0 2021-07-07