Origin of Boron in the Gas Hure Salt Lake of Northwestern Qaidam Basin, China: Evidence from Hydrochemistry and Boron Isotopes  

作　　者：HAN Jibin XU Jianxin Syed Asim HUSSAIN JIANG Hongchen MA Yunqi XU Kai MA Haizhou 

机构地区：[1]Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources,Qinghai Institute of Salt Lakes,Chinese Academy of Sciences,Xining 810008,China [2]Qinghai Provincial Key Laboratory of Geology and Environment of Salt Lakes,Xining 810008,China [3]Department of Earth Sciences,Karakoram International University,Gilgit,Gilgit-Baltistan 15100,Pakistan [4]State Key Laboratory of Biogeology and Environmental Geology,China University of Geosciences,Wuhan 430074,China

出　　处：《Acta Geologica Sinica(English Edition)》2021年第2期531-540,共10页地质学报（英文版）

基　　金：Financial support for this research was provided by the “Western Light” Fund of the Chinese Academy of Science Foundation (Y910061016);The National Natural Science Foundation of China (No. 42007169);The Key deployment projects of the Chinese academy of sciences (ZDRW-ZS-2020-3);Funds for the Natural Science Foundation of Qinghai Province (No. 2020-ZJ-932Q;2020-ZJ-732;2019-ZJ-7028)。

摘　　要：The Gas Hure Salt Lake(GHSL) in the northwestern Qaidam Basin, western China, is rich in boron(B) resources, but its B-resource origin is hardly known. Hydrochemical compositions and B isotope characteristics of different waters were collected around the GHSL, including the river water, stream water, spring water, salt-lake brine, intercrystalline brine, well water, drilling brine, and solar pond brine. The hydrochemical signatures suggest that silicates, carbonates and evaporates are the main B-bearing rocks during the water dynamic. The reservoir estimation of B resources shows that the Kulamulekesay River(KLMR) and the Atekan River(ATKR) contribute annually 18.3 tons and 22.84 tons of B, respectively, with a total amount of 11.72 × 10^(4) tons of B during the past 5.7 ka. In comparison with the known B reservoir(32.96 × 10^(4) tons) in the GHSL, a significant amount of B in the GHSL was probably recharged from deep fluids and sediments around the GHSL. The B concentration and B-enrichment degree are shaped by the evaporation process, which are highly elevated at the carnallite and bischofite stages.

关 键 词：B-bearing rock weathering evaporation process HOLOCENE Qinghai and Xinjiang provinces 

分 类 号：P618.13[天文地球—矿床学]