Suchergebnisse

International audience ; 17 Salars of the Andean Plateau in the Central Andes are the largest lithium deposits on Earth. The most 18 notorious are the Chilean Salar de Atacama, and Uyuni in the Bolivian Altiplano. Despite the relevance of the 19 region concerning the lithium resources, there is still scarce scientific literature on the hydrochemistry of lithium 20 deposits in the Argentine portion of the Andean Plateau. In this article we present new hydrochemical data from 21 the first regional-scale reconnaissance exploration of the four major salars in the northernmost Argentine Andes. 22 Data revealed that brines in the studied salars are characterized by mean Li + concentrations ranging between 82 23 and 1,014 mg L-1 , and mean Li:Mg ratios from 0.92 to 0.54. The size of the study salars becomes a potential 24 limitation for the whole Li resources in comparison with the giant Atacama and Uyuni. Nonetheless, when 25 considering the Li grade and the Li:Mg ratio of brines, the Northern Puna salars turn out to be very remarkable 26 lithium prospects. Data emerged from this survey represent a valuable tool for: 1) private investment projects by 27 defining Li mining targets, 2) for the administration of natural resources and the definition of the State's politics, 28 and 3) for scientific purposes, especially in investigations meant to better understand the processes involved in 29 the formation of Li brine deposits, salars, and endorheic basins. 30 31

International audience ; 17 Salars of the Andean Plateau in the Central Andes are the largest lithium deposits on Earth. The most 18 notorious are the Chilean Salar de Atacama, and Uyuni in the Bolivian Altiplano. Despite the relevance of the 19 region concerning the lithium resources, there is still scarce scientific literature on the hydrochemistry of lithium 20 deposits in the Argentine portion of the Andean Plateau. In this article we present new hydrochemical data from 21 the first regional-scale reconnaissance exploration of the four major salars in the northernmost Argentine Andes. 22 Data revealed that brines in the studied salars are characterized by mean Li + concentrations ranging between 82 23 and 1,014 mg L-1 , and mean Li:Mg ratios from 0.92 to 0.54. The size of the study salars becomes a potential 24 limitation for the whole Li resources in comparison with the giant Atacama and Uyuni. Nonetheless, when 25 considering the Li grade and the Li:Mg ratio of brines, the Northern Puna salars turn out to be very remarkable 26 lithium prospects. Data emerged from this survey represent a valuable tool for: 1) private investment projects by 27 defining Li mining targets, 2) for the administration of natural resources and the definition of the State's politics, 28 and 3) for scientific purposes, especially in investigations meant to better understand the processes involved in 29 the formation of Li brine deposits, salars, and endorheic basins. 30 31

International audience ; 17 Salars of the Andean Plateau in the Central Andes are the largest lithium deposits on Earth. The most 18 notorious are the Chilean Salar de Atacama, and Uyuni in the Bolivian Altiplano. Despite the relevance of the 19 region concerning the lithium resources, there is still scarce scientific literature on the hydrochemistry of lithium 20 deposits in the Argentine portion of the Andean Plateau. In this article we present new hydrochemical data from 21 the first regional-scale reconnaissance exploration of the four major salars in the northernmost Argentine Andes. 22 Data revealed that brines in the studied salars are characterized by mean Li + concentrations ranging between 82 23 and 1,014 mg L-1 , and mean Li:Mg ratios from 0.92 to 0.54. The size of the study salars becomes a potential 24 limitation for the whole Li resources in comparison with the giant Atacama and Uyuni. Nonetheless, when 25 considering the Li grade and the Li:Mg ratio of brines, the Northern Puna salars turn out to be very remarkable 26 lithium prospects. Data emerged from this survey represent a valuable tool for: 1) private investment projects by 27 defining Li mining targets, 2) for the administration of natural resources and the definition of the State's politics, 28 and 3) for scientific purposes, especially in investigations meant to better understand the processes involved in 29 the formation of Li brine deposits, salars, and endorheic basins. 30 31

PurposeAs stated in the United Nations Global Assessment Report 2022 Concept Note, decision-makers everywhere need data and statistics that are accurate, timely, sufficiently disaggregated, relevant, accessible and easy to use. The purpose of this paper is to demonstrate scalable and replicable methods to advance and integrate the use of earth observation (EO), specifically ongoing efforts within the Group on Earth Observations (GEO) Work Programme and the Committee on Earth Observation Satellites (CEOS) Work Plan, to support risk-informed decision-making, based on documented national and subnational needs and requirements.Design/methodology/approachPromotion of open data sharing and geospatial technology solutions at national and subnational scales encourages the accelerated implementation of successful EO applications. These solutions may also be linked to specific Sendai Framework for Disaster Risk Reduction (DRR) 2015–2030 Global Targets that provide trusted answers to risk-oriented decision frameworks, as well as critical synergies between the Sendai Framework and the 2030 Agenda for Sustainable Development. This paper provides examples of these efforts in the form of platforms and knowledge hubs that leverage latest developments in analysis ready data and support evidence-based DRR measures.FindingsThe climate crisis is forcing countries to face unprecedented frequency and severity of disasters. At the same time, there are growing demands to respond to policy at the national and international level. EOs offer insights and intelligence for evidence-based policy development and decision-making to support key aspects of the Sendai Framework. The GEO DRR Working Group and CEOS Working Group Disasters are ideally placed to help national government agencies, particularly national Sendai focal points to learn more about EOs and understand their role in supporting DRR.Originality/valueThe unique perspective of EOs provide unrealized value to decision-makers addressing DRR. This paper highlights tangible methods and practices that leverage free and open source EO insights that can benefit all DRR practitioners.