矿床地质2024，Vol.43Issue(1)：60-70,11.DOI:10.16111/j.0258-7106.2024.01.004
罗布泊盐湖区固体钾盐沉积特征、分布及成因探讨
Sedimentary characteristics,distribution and genetic mechanism of solid potash deposits in salt lake of Lop Nur
摘要
Abstract
The sedimentary characteristics,spatial-temporal distribution and genetic formation of various solid potash deposits,mainly including polyhalite,carnallite and kainite in Lop Nur were summarized in this study.Polyhalite sediments mainly formed in subsidence area of Luobei Sag and are characterized by replacement origin.They rep-resent products of water-salt interaction of the potassium-and magnesium-rich residual brine with the existed cal-cium sulfate like gypsum and glauberite in sulfate-type lake.Sediments of carnallite mainly occur on the surface or near surface of fault zones in Lop Nur that fed by the deep CaCl-type brine through faults.The kainite sedi-ments mainly distributed in Nanxiaotuan area and sourced from recharges of evaporated brine in Luobei Sag due to basement inversion.The formation of solid potassium sediments in Lop Nur rely on the coupling of tectonics,provenances and arid climate in a special time window.Under the arid climate condition,the tectonic activities lead geomorphic divides to form more closed sub-sage that provides accommodations for potash deposits.On the other hand,it reactivated fault to offer essential channels for upward migration of deep fluids that modified chemi-cal composition of lake brine to finally form various potash sediments.关键词
固体钾盐/成钾条件/盐湖/罗布泊Key words
solid potash/formation condition/salt lake/Lop Nur分类
天文与地球科学引用本文复制引用
尹慧晶,张华,刘成林,颜辉,焦鹏程,马宝成,袁苗,赵亮亮..罗布泊盐湖区固体钾盐沉积特征、分布及成因探讨[J].矿床地质,2024,43(1):60-70,11.基金项目
本文得到国家自然科学基金(编号:41972092、40830420)、第三次新疆综合科学考察项目(编号:2022xjkk1303)、新疆维吾尔自治区重大科技专项(编号:2022A03009-2)和国投新疆罗布泊钾盐有限责任公司科技项目联合资助 （编号:41972092、40830420）
