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Ŀ¼ÐòÇ°ÑÔ**²¿·Ö ÖصãʵÑéÊÒ¼°Ò°Íą̂վ½¨Éè×ÔÈ»×ÊÔ´²¿Ñκþ×ÊÔ´Óë»·¾³ÖصãʵÑéÊÒ 2020Äê¶ÈÔËÐмò¿ö 3¸øÇà²Ø¸ßÔ­Ñκþ×°ÉÏÎÂʪ¼Ç¼Æ÷£ºÒ°Íâ¿Æѧ¹Û²âÑо¿ÏÖ×´ÓëδÀ´·¢Õ¹ 14µÚ¶þ²¿·Ö ÑÎÀ༰ÆäËû¿ó²ú Progress in the investigation of potash resources in western China 23 Geothermal-type lithium resources in southern Xizang, China 35Hydrochemical characteristics and evolution of hot fluids in the Gudui geothermal field in Comei County, Himalayas 53 O, H, and Sr isotope evidence for origin and mixing processes of the Gudui geothermal system, Himalayas, China 78Sedimentary and geochemical characteristics of Triassic new type of polyhalite potassium resources in northeast Sichuan and its genetic study 99 Distribution of trace elements, Sr-C isotopes, andsedimentarycharacteristics as paleoenvironmental indicator of the Late Permian Linxi Formation in the Linxi Area, eastern Inner Mongolia 111Differences in evaporite geochemistry of the greater Ordos Ordovician salt basin, China: evidence from the M56 submember of the Majiagou Formation 130 M