湖泊科学2018，Vol.30Issue(1)：220-233,14.DOI:10.18307/2018.0122
应用核磁共振技术分析干盐湖地区地下卤水空间分布特征——以昆特依干盐湖为例
Application of nuclear magnetic resonance (NMR) technology to study the space distribution features of underground brine from playa lakes: A case study of Kunteyi Playa Lake
摘要
Abstract
Kunteyi Playa Lake,located in the northwest of Qaidam Basin,is an extremely large comprehensive salt deposit.The Great Salt Beach is the largest salt beach in the Kunteyi Playa Lake with underground brine deposit,poor hydrogeological conditions,and extremely low water content in the main seam,so it is diffcult to exploit.Nuclear Magnetic Resonance (NMR) is a effective geophysical method currently used to detect groundwater directly.Comparing with the traditional geophysical methods,the NMR method is of higher resolution,more efficiency,more information and unique interpretation for hydrogeological investigations.In this paper,NMR sounding is used to study the space distribution characteristics of the underground brine.The NMR data were processed with the inversion,combined with geological and drilling data,and integrated with geological and geophysical interpretation for each measuring point.We find that in Kanteyi Playa Lake there are three brine aquifers exists from 0 to 130 m below the surface.The distribution of three brine aquifers is like funnel-shaped or approximate layer.The W1 is latent brine formations,large permeability and coarse grain,with per unit volume of water of 0.4％-2.7％.The W2 and W3 are pressurized brine,low permeability and coarse grain,with per unit volume of water of 0.2％-1.1％ and 0.1％-0.8％ respectively.There existed two brine enrichment regions in the study area,the southwest centre of the exploration basin and the northeast basin.According to the distribution of brine and the structure in this area,we delimitate prospecting area of underground brine,the depositional centre of Great Salt Beach Synclinal,fault F1 to F8 and remote sensing fault F6 development areas in the north of the Great Salt Beach,cold-lake Structural belt.In dry salt lake area,the reliable detection depth of GMR system is 130 m.GMR systems can detect not only free water effectively,but also distribution of bound water to interpret the distribution rule of water-bearing salt minerals and aquiferous clay minerals.关键词
核磁共振技术/干盐湖/地下卤水/柴达木盆地/盐湖资源/昆特依干盐湖Key words
Nuclear magnetic resonance/playa lakes/underground brine/Qaidam Basin/salt lake resources/Kunteyi Playa Lake引用本文复制引用
杨修猛,刘文玉,韩凤清,韩继龙,Hussain Syed Asim,年秀清,毛庆飞,严维德..应用核磁共振技术分析干盐湖地区地下卤水空间分布特征——以昆特依干盐湖为例[J].湖泊科学,2018,30(1):220-233,14.基金项目
青海省应用基础研究计划项目(2014-ZJ-702)和中国科学院青海盐湖研究所“一三五”战略发展规划项目联合资助. （2014-ZJ-702）
