scholarly journals A geochemical investigation of mafic-ultramafic intrusions for metallogenic pathfinder elements in the La Ronge-Lynn Lake greenstone belt: an overview

1995 ◽  
Author(s):  
L J Hulbert
Keyword(s):  
Greenstone Belt ◽  
Lynn Lake ◽  
Geochemical Investigation ◽  
Pathfinder Elements

scholarly journals Age relationships and preliminary U-Pb zircon geochronology results from the Lynn Lake Greenstone Belt

2018 ◽  
Author(s):  
C J M Lawley ◽  
D Schneider ◽  
E Yang ◽  
W J Davis ◽  
S E Jackson ◽  
...  
Keyword(s):  
Greenstone Belt ◽  
Zircon Geochronology ◽  
Lynn Lake

Estructura, metamorfismo y petrología del basamento ígneo-metamórfico de la Sierra de San Luis entre Nogolí y Gasparillo

2003 ◽  
Author(s):  
◽  
Pablo Diego González
Keyword(s):  
Greenstone Belt ◽  
San Luis

El análisis de la evolución estructural, metamórfica y magmática del basamento del sector occidental de la Sierra de San Luis entre Nogolí y Gasparillo permitió identificar al ciclo orogénico Famatiniano dividido en dos etapas: 1) una fase orogénica principal, de edad fundamentalmente ordovícica, y 2) una etapa tardía a pos-orogénica, desarrollada entre el Silúrico y el Carbonífero Temprano. Los procesos anteriores a ellos fueron agrupados como pre-Famatinianos. El evento más antiguo reconocido en el Complejo Metamórfico Nogolí es una sedimentación silicoclástica pelítica y psamítica vinculada a flujos de komatiitas, basaltos komatiíticos y basaltos toleíticos de alto Fe, y a intercalaciones de estratos de Fe bandeado (BIF). La asociación litológica komatiita-BIF dentro de una misma secuencia (típica de un greenstone belt) y una edad Sm-Nd roca total de 1500 Ma para la posible cristalización de los flujos máficos-ultramáficos sugieren una edad mesoproterozoica para el protolito del Complejo Metamórfico Nogolí. La posterior estructuración E-O a NO-SE asociada a metamorfismo relíctico de T alta y P media es asignada a la actividad orogénica del ciclo Pampeano. Se describe un conjunto de tres eventos deformativos, con plegamientos, foliaciones e inyecciones graníticas asociadas. Por otro lado se registra la sedimentación de la Formación San Luis y la Unidad La Alumbrera que habría sido anterior o coetánea con el metamorfismo y la deformación pre-Famatinianos del Complejo Metamórfico Nogolí.

Fluoride Accumulation in Groundwater from Semi-arid Part of Deccan Volcanic Province, India: A Cause of Urolithiasis Outbreak

2017 ◽  
Vol 1 (1) ◽  
pp. 9-17 ◽  
Author(s):  
Sanjay Kale ◽  
N. J. Pawar
Keyword(s):  
Medical Records ◽  
Fluoride Concentration ◽  
Data Generation ◽  
Deccan Volcanic Province ◽  
Temporal And Spatial Distribution ◽  
Volcanic Province ◽  
Fluoride Accumulation ◽  
Hot Days ◽  
Geochemical Investigation ◽  
Relationship Of

Groundwater fluoride and health problem was meticulously studied for dental and skeleton fluorosis except few studies on urolithiasis. Urolithiasis is multi-factorial disease and excess fluoride consumption is one of the causal factors. In view of this, increase of fluoride in groundwater is reported in semiarid Deccan Volcanic Province (DVP), India. To understand the fluoride and urolithiasis association, present study was carried out in Karha river basin of DVP region. Three stages of data generation were adopted for present study such as procuring of medical records of urolithiasis, previous groundwater chemistry data and geochemical investigation of 50 groundwater samples from representative villages. Further, these variables were used for correlation analysis, temporal and spatial distribution to find out their relationships. Result shows medical records of hospitals indicating the gradual increase in urolithiasis is reported during drought situations. In temporal variation, annual fluoride concentration of groundwater and hot days are positively correlated with annual urolith patients as well as spatial study supports the same. In conclusion, present study highlights the relationship of urolith formation with number of hot days, groundwater electrical conductivity and fluoride. However, detailed biomedical study may lead towards understanding of fluoride- urolithiasis relationship.

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