scholarly journals New insights from textural, petrographic, and geochemical investigation of the gabbroic rocks of the Bird River intrusive event within the Bird River greenstone belt, southeastern Manitoba

2015 ◽  
Author(s):  
V Bécu ◽  
M G Houlé ◽  
V J McNicoll ◽  
X M Yang ◽  
H P Gilbert
Keyword(s):  
Greenstone Belt ◽  
Geochemical Investigation

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.

Evidence for Mesoarchean subduction in southern Bundelkhand Craton, India: Geochemical fingerprints from metavolcanics of Kurrat - Girar - Badwar Greenstone Belt

Geochemistry ◽  
2021 ◽  
pp. 125787
Author(s):  
Sikha Hiloidari ◽  
Manavalan Satyanarayanan ◽  
Surya Pratap Singh ◽  
Rajneesh Bhutani ◽  
K.S.V. Subramanyam ◽  
...  
Keyword(s):  
Greenstone Belt

scholarly journals Complementary Use of Magnetometric Measurements for Geochemical Investigation of Light REE Concentration in Anthropogenically Polluted Soils

Minerals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 457
Author(s):  
Piotr Fabijańczyk ◽  
Jarosław Zawadzki
Keyword(s):  
Soil Samples ◽  
Soil Conditions ◽  
Soil Cores ◽  
Light Rare Earth ◽  
Polluted Soils ◽  
Chemical Measurements ◽  
Geochemical Investigation ◽  
Light Rare Earth Elements ◽  
Soil Magnetic Susceptibility ◽  
Geophysical Measurements

The purpose of this study was to use fast geophysical measurements of soil magnetic susceptibility (κ) as supplementary data for chemical measurements of selected light rare earth elements (REEs) in soil. In order to ensure diversity in soil conditions, anthropogenic conditions and types of land use, seven areas were selected, all located in regions subjected to past or present industrial pollution. Magnetometric parameters were measured using a selected magnetic sensor that was specially designed for measurements of soil cores and were used to classify collected soil cores into six distinctive types. The analysis of REEs concentrations in soil was carried out taking into account the grouping of collected soil samples based on the type of study area (open, forested and mountain), and additionally on the measured magnetometric parameters of collected soil cores. A use of magnetometric measurements provided different, but complementary to chemical measurements information, which allowed to obtain deeper insight on REEs concentrations in soils in studied areas.

scholarly journals Oxygen Fugacity and Volatile Content of Syntectonic Magmatism in the Neoarchean Abitibi Greenstone Belt, Superior Province, Canada

Minerals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 966
Author(s):  
Baptiste Madon ◽  
Lucie Mathieu ◽  
Jeffrey H. Marsh
Keyword(s):  
Oxygen Fugacity ◽  
Greenstone Belt ◽  
Inductively Coupled Plasma ◽  
Gold Mineralization ◽  
Gold Deposits ◽  
Hydrothermal Systems ◽  
Chemical Diversity ◽  
Temporal Association ◽  
Volatile Content ◽  
Abitibi Subprovince

Neoarchean syntectonic intrusions from the Chibougamau area, northeastern Abitibi Subprovince (greenstone belt), may be genetically related to intrusion related gold mineralization. These magmatic-hydrothermal systems share common features with orogenic gold deposits, such as spatial and temporal association with syntectonic magmatism. Genetic association with magmatism, however, remains controversial for many greenstone belt hosted Au deposits. To precisely identify the link between syntectonic magmas and gold mineralization in the Abitibi Subprovince, major and trace-element compositions of whole rock, zircon, apatite, and amphibole grains were measured for five intrusions in the Chibougamau area; the Anville, Saussure, Chevrillon, Opémisca, and Lac Line Plutons. The selected intrusions are representative of the chemical diversity of synvolcanic (TTG suite) and syntectonic (e.g., sanukitoid, alkaline intrusion) magmatism. Chemical data enable calculation of oxygen fugacity and volatile content, and these parameters were interpreted using data collected by electron microprobe and laser ablation-inductively coupled plasma-mass spectrometry. The zircon and apatite data and associated oxygen fugacity values in magma indicate that the youngest magmas are the most oxidized. Moreover, similar oxygen fugacity and high volatile content for both the Saussure Pluton and the mineralized Lac Line intrusion may indicate a possible prospective mineralized system associated with the syntectonic Saussure intrusion.

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