Modeling Lunar Pyroclasts to Probe the Volatile Content of the Lunar Interior

Quantifying the volatile content of the lunar interior is valuable for understanding the formation, thermal evolution, and magmatic evolution of the Earth and Moon. Petrological modelling and geochemical measurements have been used to study the volatile composition of the lunar interior. Improvements to analytical instruments have facilitated more precise measurements of the volatile content of lunar samples and meteorites, however, several problems remain with these measurements, hence, the volatile content of lunar magmas has yet to be constrained with certainty. We propose a volcanological approach for inferring the volatile contents of different lunar magmas.&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160; A terrestrial magma ascent model has been modified for lunar applications. Numerous parameters were adjusted for lunar conditions, including: magma major element composition, from low-Ti (green and yellow glasses) to high-Ti (orange, red, and black glasses); H2O content; CO content; gravity; and pressure. The model calculated values for gas exsolution, viscosity, mass flow rate, and several other ascent processes, from a depth of 10 km to the surface. Using these results, we will assess the effect of varying magmatic volatile content on lunar magma ascent processes. We will also compare and contrast our results with existing models for lunar magma ascent, as well as models for magma ascent on other planetary bodies. Future work will involve modelling eruptions, using results from the magma ascent model, and verifying the results of the models using images and digital elevation models of the lunar surface.

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Modeling Lunar Pyroclasts to Probe the Volatile Content of the Lunar Interior

10.1002/essoar.10504021.1 ◽

2020 ◽

Author(s):

Darien Florez ◽

Christian Huber ◽

Ralph E. Milliken ◽

Julia Berkson

Keyword(s):

Volatile Content ◽

Lunar Interior

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Plastics piping systems. Polyethylene piping materials and components. Determination of volatile content

10.3403/01190876u ◽

2015 ◽

Keyword(s):

Volatile Content ◽

Piping Systems

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Some Recent Developments in Sewage Sludge Pumping

Water Science & Technology ◽

10.2166/wst.1988.0171 ◽

1988 ◽

Vol 20 (4-5) ◽

pp. 227-236

Author(s):

J. H. Lohmann ◽

W. F. Garber

Keyword(s):

Sewage Sludge ◽

Treatment Plant ◽

Rheological Characteristics ◽

Volatile Content ◽

Collection System ◽

Positive Displacement ◽

Low Viscosity ◽

Recent Developments ◽

Cylinder Piston ◽

Pumping Equipment

The pumping of sewage sludge solids is reviewed in terms of handling high and low viscosity materials with solids concentrations varying from about 4 % to perhaps 50 %. Knowledge of rheological characteristics including thixotropy is necessary in designing pumping systems with sludge solids percentages, volatile content, particle size, abrasives content and temperatures being variables which could change pump types found suitable from facility to facility. The characteristics of a sewage collection system is also important in determining pumping parameters needed in a treatment plant. Solids handling equipment from other industries have made significant contributions to sewage solids pumping in recent years. Included are moyno-type progressing cavity screw-centrifugal, recessed impeller rotation piston positive displacement, and two cylinder piston S-transfer positive displacement pumps. Pumping equipment used in the F.R.G. and in Southern California in the U.S.A. is remarkably similar. These types of pumps offer the possibility of designing optimum solids dewatering and transfer systems.

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High-Throughput Chlorophyll and Carotenoid Profiling Reveals Positive Associations with Sugar and Apocarotenoid Volatile Content in Fruits of Tomato Varieties in Modern and Wild Accessions

Metabolites ◽

10.3390/metabo11060398 ◽

2021 ◽

Vol 11 (6) ◽

pp. 398

Author(s):

Yusuke Aono ◽

Yonathan Asikin ◽

Ning Wang ◽

Denise Tieman ◽

Harry Klee ◽

...

Keyword(s):

High Throughput ◽

Fruit Color ◽

Wild Relatives ◽

Aroma Compounds ◽

Soluble Solids ◽

Sugar Production ◽

Volatile Content ◽

Factors Influencing ◽

High Throughput Method ◽

Wild Accessions

Flavor and nutritional quality has been negatively impacted during the course of domestication and improvement of the cultivated tomato (Solanum lycopersicum). Recent emphasis on consumers has emphasized breeding strategies that focus on flavor-associated chemicals, including sugars, acids, and aroma compounds. Carotenoids indirectly affect flavor as precursors of aroma compounds, while chlorophylls contribute to sugar production through photosynthesis. However, the relationships between these pigments and flavor content are still unclear. In this study, we developed a simple and high-throughput method to quantify chlorophylls and carotenoids. This method was applied to over one hundred tomato varieties, including S. lycopersicum and its wild relatives (S. l. var. cerasiforme and S. pimpinellifolium), for quantification of these pigments in fruits. The results obtained by integrating data of the pigments, soluble solids, sugars, and aroma compounds indicate that (i) chlorophyll-abundant varieties have relatively higher sugar accumulations and (ii) prolycopene is associated with an abundance of linear carotenoid-derived aroma compounds in one of the orange-fruited varieties, “Dixie Golden Giant”. Our results suggest the importance of these pigments not only as components of fruit color but also as factors influencing flavor traits, such as sugars and aroma.

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

Minerals ◽

10.3390/min10110966 ◽

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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