Paleomagnetic data from the lunpola basin
  • 2019-10-21
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The Lunpola Basin in the central Tibetan Plateau is situated along the southern margin of the east-west stretched Banggong-Nujiang suture belt between the Qiangtang Terrane and the Lhasa Terrane. The thick and continuous Cenozoic sediments in the basin can provide great potential for understanding the tectonic uplift, paleoaltimetry, erosion and depositional history of the Tibetan Plateau and climate environmental evolution. However, the study of geologic and climatic changes has been hindered by poor age constraints on the Cenozoic sedimentary sequence in the Lunpola Basin, especially its upper part with typical lacustrine oil shale sediments due to the discontinuous or unexposed outcrop caused by erosion or weathering. In this study, we investigated a 658 m-thick Cenozoic continuous lacustrine sedimentary section, Lunpori, from the upper sequence of the central basin. We found two layers of tuffs in this section and then carried out detailed paleomagnetic measurements. Constrained by tie points of U-Pb zircon ages, the observed magnetic zones are well correlated with chrons C5Bn.2n to C6AAn of the Geomagnetic Polarity Time Scale, yielding ages of ~21.2 to 15 Ma for the section. Lithofacies, pollen and fossil records suggest a relative temperate, humid climate prevailing in the Lunpola Basin during the period of Dingqinghu Formation, indicating that the Indian monsoon occurred before ~26 Ma.Through paleomagnetic analysis and testing of fluvial and lacustrine facies strata in Lumpola Basin since Miocene, 22Ma-15Ma magnetic stratigraphic chronology has been obtained.

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Dataset of spatial and temporal distribution of global strong earthquakes (1989-2018)
  • 2019-09-29
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This data set is used to analyze the global activity level of strong earthquakes (Mw 5) in the past 30 years, and to present it spatially. It can be used to obtain the distribution areas of strong earthquakes with high frequency and activity level in recent years. By comparing the distribution of strong earthquakes in 2018 with that in 1989-2018, the distribution characteristics of global strong earthquakes in 2018 are obtained. The original data of strong earthquakes are from USGS, and the local density is calculated as frequency information. The magnitudes of all earthquake cases are interpolated globally, and then the frequency and magnitude are multiplied as the activity level of strong earthquakes. The data set is in TIff format with a spatial resolution of about 80 km. The data set can provide a reference for the analysis of strong earthquake activity level on the global scale, and is helpful for the analysis of global earthquake risk and the construction of earthquake prevention and disaster reduction system.

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WATER: Dataset of surface roughness measurements in the E’pu foci experimental area during the pre-observation period
  • 2019-09-15
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The dataset of surface roughness measurements was obtained in No. 1 and 2 quadrates of the E’bao foci experimental area during the pre-observation period. Both the quadrates were divided into 3×3 subsites, with each one spanning a 30×30 m2 plot. With the roughness board 110cm long and the measuring points distance 1cm, the samples were collected along the strip from south to north and from east to west, respectively. The coordinates of the sample would be got with the help of ArcView; and after geometric correction, surface height standard deviation (cm) and correlation length (cm) could be calculated based on the formula listed on pages 234-236, Microwave Remote Sensing, Vol. II. The original photos of each sampling point, surface height standard deviation (cm) and correlation length (cm) were archived. The roughness data were initialized by the sample name, which was followed by the serial number, the name of the file, standard deviation and correlation length. Each .txt file is matched with one sample photo and standard deviation and correlation length represent the roughness. In addition, the length of 101 needles is also included for further validation.

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The dataset of ophiolite cumulate chronology and isotope in Nagqu, Tibet (2011-2012)
  • 2019-09-15
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Data source description: The data are generated by arranging the literature. Test method: zircon U-Pb isotope LA-(MC)-ICPMS test; Re-Os isotope dilution method TIMS test. Data processing method: The data are automatically acquired by the analytical instrument, and the dating data are calculated using ISOPLOT software. The accuracy of the raw data: The accuracy of the zircon age test is shown in the error analysis value in the table; the accuracy of the Re-Os isotope analysis is shown in the error analysis value in the table. Data generating process: The first author personally analyzes and obtains the data, strictly in accordance with the experimental specifications Applications: Geology Data accuracy after processing: The accuracy of the processed data table is basically consistent with the analysis accuracy. The data contains 2 tables: (1) Zircon U-Pb isotope age analysis results table and (2) Whole rock and spinel Re-Os isotope 7 U-Pb zircon age data and 5 Re-Os isotope data. Data Types: Table 1: Zircon U-Pb age Data type: digital Table 2: Whole rock and spinel Re-Os isotopes Data type: digital Dimensions (unit of measure): "Zircon U-Pb age" dimension: Ma, "Re-Os isotope" dimension: ratio

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WATER: Dateset of the ground-based RPG-8CH-DP microwave radiometer observations in the Biandukou foci experimental area
  • 2019-09-15
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The dateset of the ground-based RPG-8CH-DP microwave radiometer observations was obtained in the Biandukou foci experimental area from Mar. 14 to 17, 2008. Observation items included the brightness temperature by the ground-based microwave radiometer (18.7GHz and 36.5GHz), the soil temperature by the thermal resistor, the gravimetric soil moisture by the microwave drying method, and the surface roughness by the grid board. The wheat stubble land (38°15'44.13"N, 100°55'35.34"E) was chosen for continuous observations from 11:00 to 24:00 on Mar. 14, with the incidence 20°-70° and the step length 5°. The rape stubble land (38°15'23.17"N, 100°58'37.84"E) was chosen for continuous observations from 10:00 to 21:30 on Mar. 16, with the incidence 20°-70° and the step length 5°. The deep plowed land (38°18'8.28"N, 101° 3'27.22"E) was chosen for short time observations from 17:26 to 19:20 on Mar. 17, with the azimuth angle 240°-300° and the step length 10°, the incidence 40°-70° and the step length 5°. The brightness temperature was archived as .BRT and .txt files (the ASCII format). Each row in .txt was listed by year, month, date, hour, minute, second, 6.925GHz (h), 6.925GHz (v), 10.65GHz (h), 10.65GHz (v) , 18.7GHz (h), 18.7GHz (v), 36.5GHz (h), 36.5GHz (v), the elevation angle, and the azimuth angle. Values for 6.925GHz and 10.65GHz were zero due to malfunction. The roughness data were obtained by the grid board and the camera and the RMS height (cm) and correlation length (cm) were also calculated and archived, which could be opened by Notepad or Microsoft Office Word. Those provide reliable reference for the roughness of the same land cover type. The gravimetric soil moisture (soil samples from 0-1cm, 1-3cm and 3-5cm) was measured by the microwave drying method. The file can be opened by Microsoft Office Word. The shallow layer soil moisture was measured by hydra prob from 12:00 to 17:00 on 14 and by the Hydra probe (straight downward for 0-5cm) and HH2 (level into the soil surface) on 16. The surface temperature was measured by the thermal resistor. The file can be opened by Microsoft Office Word. Four data files were included, the brightness temperature, the surface temperature, the soil moisture and the surface roughness.

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The data of zircon U-Pb ages of granites in south Qiangtang of the Tibetan Plateau (2014)
  • 2019-09-15
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This data set collected zircon U-Pb isotope age data of the granites in the southern Qiangtang terrane of the Tibetan Plateau from articles published before October 2014. The data were analyzed by Laser Ablation-Inductively Coupled Plasma-Mass Spectrometry (LA-ICPMS), Sensitive High-Resolution Ion Microprobe (SHRIMP), and Isotope Dilution Thermal Ionization Mass Spectrometry (ID TIMS). The data were obtained according to laboratory standards, and the data quality met laboratory requirements. The data contents are as follows: Region Locality Lithology Sample No. Dating method Age (Ma) References

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1:1,000,000 geomorphological map of Western China
  • 2019-09-14
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The landform information integration in western China was completed by a team led by Dr. Xie chuanjie, from the institute of geography, resources and environment, Chinese academy of sciences.It includes 1:400,000 national geomorphologic database and 1:100,000 western geomorphologic database. 1:400,000 geomorphologic data are "China geomorphologic map (1:400,000)" edited by LI Bingyuan and "China and its adjacent areas geomorphologic map (1:400,000)" edited by CHEN Zhiming. Scan and register the data, vectorize all the registered maps by using ArcMap software, and establish their own classification and code system. According to map spots (common staining) and symbols, geomorphic types are divided into basic geomorphic types and morphological structure types (points, lines and planes). 1:1000000 western geomorphic data is integrated and updated by digital geomorphology based on multi-source data such as remote sensing image and adopts hierarchical interpretation method.Plains and mountains;Primary geomorphic types (25 types),10 genetic types: secondary genetic types: subdivision of morphological differences. The type of geomorphic material whose composition or lithology is determined. Conducted among 16 landscape points of interpretation work, their Numbers are: 45 (Kathmandu), G - G - 46 (the) wrong, H - 44 (pli), 45 (xigaze), H - H - 46 (Lhasa), H - 47 (qamdo), 43 (Islamabad), I - I - 44 (lion spring river), 45 (change), I - I - (amdo) 46, 47 (yushu), J - I - 43 (kashi) (wada), J, J - 44-45 (JuMo), 46 (golmud), J J - - 47 (xining)

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Dataset of ultramafic mineral, whole rock composition and Re-Os isotope of Bangong Lake, Dongqiao and Nagqu in Tibet (2009-2013)
  • 2019-09-13
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Data source description: The data are generated by arranging the literature, and the references are as follows: [1] Huang, QS, Shi, RD, O'Reilly, SY, Griffin, WL, Zhang, M., Liu, DL, Zhang, XR, 2015. Re-Os isotopic constraints on the evolution of the Bangong-Nujiang Tethyan oceanic mantle, Central Tibet. Lithos, 224–225: 32-45. Test methods: major elements XRF test; trace elements ICP-MS test; mineral EPMA test; whole rock Re-Os isotope dilution method TIMS test; in situ sulfide LA-MC-PMS test. Data processing method: The data are automatically acquired by the analytical instrument, and the dating data are calculated using ISOPLOT software. The accuracy of the raw data: The accuracy of the major element analysis is 1-5%; the accuracy of the trace element analysis is 10%; and the accuracy of the Re-Os isotope analysis is shown in the error analysis value in the table. Data generation process: The first author has personally analyzed and obtained the data strictly in accordance with the experimental specifications. Applications: Geology Data accuracy after processing: The accuracy of the processed data table is basically consistent with the analysis accuracy. The data contain 7 tables. (1) Composition of major elements of peridotite whole rock (2) Re-Os isotope of peridotite whole rock (3) Sulfide Re-Os isotope (4) Trace elements in peridotite whole rock (5) Peridotite composition (6) Spinel composition (7) Sulfide composition 25 sets of composition data of major elements of peridotite whole rock; 42 Re-Os whole rock; 13 Re-Os sulfides; 25 trace whole rocks; 40 peridotite composition; 52 spinel composition; 16 sulfide composition. Data types: Table 1: Whole rock major elements Data type: digital Table 2: Whole Rock Re-Os Isotope Data type: digital Table 3: Sulfide Re-Os isotope Data type: digital Table 4: Whole rock trace elements Data type: digital Table 5: Peridotite composition Data type: digital Table 6: Spinel composition Data type: digital Table 7: Sulfide composition Data type: digital Dimensions (unit of measure): "whole rock major elements composition" dimension: percentage%; "Re-Os isotope" dimension: ratio; "trace element" dimension: ppm; "mineral composition" dimension: percentage%

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Summary of carbonate composition of bedrock and representative sediments in the Northeastern Tibetan Plateau (2002-2015)
  • 2019-09-13
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This data set collects carbonate Sr, Mg and Ca compositions of bedrock (silicate and carbonate) and sediment (topsoils, sand, fluvial sediments, and aeolian sediments) on the northeastern Tibetan Plateau published before 2015. In the data processing method, after removing the soluble salt with water and dissolving by dilute acetic acid, the contents of Sr, Mg and Ca in supernatant are measured by ICP-OES (Inductively Coupled Plasma Emission Spectrometry). The data are obtained according to laboratory standards, and the relative standard deviation of Sr, Mg and Ca tests is less than 2%. The data set consists of six forms, which are silicate rocks, carbonate rocks, topsoils, sand, fluvial sediments and aeolian sediments. There are 7 fields in the data sheets. Field 1: "Ca", carbonate Ca content in bedrock and sediment, Field 2: "Mg", carbonate Mg content in bedrock and sediment Field 3: "Sr", carbonate Sr content in bedrock and sediment Field 4: "Mg/Ca", carbonate Mg/Ca in bedrock and sediment Field 5: "Sr/Ca", carbonate Sr/Ca ratio in bedrock and sediment Field 6: "Type", bedrock type Field 7: "Source", data source Dimensions (units of measurement): “Ca”: ppm,“Mg”: ppm; “Sr”: ppm, “Mg/Ca”: mmol/mol, “Sr/Ca”: mmol/mol

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WATER: Dataset of surface roughness measurements in the Linze grassland foci experimental area on Jun , 2008
  • 2019-09-13
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The dataset of surface roughness measurements was obtained in the reed plot A, the saline plots B and C of the Linze grassland foci experimental area on Jun. 7, 18 and 25, 2008. All the quadrates were divided into 4×4 subsites, with each one spanning a 120×120 m2 plot. With the roughness plate 110cm long and the measuring points distance 1cm, the samples were collected from south to north and from east to west, respectively. The coordinates of the sample would be got with the help of ArcView; and after geometric correction, surface height standard deviation (cm) and correlation length (cm) could be acquired based on the formula listed on pages 234-236, Microwave Remote Sensing, Vol. II. The original photos of each sampling point, surface height standard deviation (cm) and correlation length (cm) were included this dataset. The roughness data were initialized with the sample name, which was followed by the serial number, the name of the file, standard deviation and correlation length. Each .txt file is matched with one sample photo and standard deviation and correlation length represent the roughness. In addition, the length of 101 needles is also included for further checking.

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