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Copyright of Arid Zone Research / Ganhanqu Yanjiu is the property of Arid Zone Research Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Rock & Mineral Analysis is the property of Editorial Board of Rock & Mineral Analysis and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The Ruoergai highland pasture is located in the remote，high altitude area of China. Atmospheric transport and precipitation is one of the major routes of pollutants to this area， but pollution source identification is difficult due to the monsoon. Atmospheric aerosol samples were taken in different seasons at multiple sites in Ruoergai. High precision Pb isotope analysis for soils and atmospheric aerosols was performed by using Thermal Ionization Mass Spectrometry (TIMS)， which has the advantage of effectively removing the isotope fractionation effect in mass analysis. The sources of the aerosols were analyzed in association with the characteristics of the monsoon. The range of 208Pb /204Pb ratio is 38.790 土 0. 002 - 38. 945 土 0. 001 and 206Pb /207Pb 1. 18551 土 0.00002 - 1. 19362 ± 0. 00002，208Pb /204Pb in the atmospheric aerosol is 37. 496 土 0. 001 - 38. 490 土 0. 001 and 206Pb /207Pb 1.12894 ± 0. 00001 - 1. 16734 ± 0. 00001. The Pb isotopic composition of soil in Ruoergai is characterized by high radiogenic Pb， mainly from local rock and minerals. The Pb isotopic composition of aerosols differs from that of soil， showing a multiple mode of mixing of natural and anthropogenic sources. Automobile exhaust gas and long-range atmospheric transport mainly from the north (Lanzou) and northwest (Qinghai， Xinjiang，Kazakhstan and Russia) are possible sources of aerosols and pollutants. [ABSTRACT FROM AUTHOR]