Differentiation of a CO2-rich, hydrous alkalic basalt and the genesis of carbonatites

Simple item page
dc.contributor.committeeMemberDasgupta, Rajdeep
dc.contributor.committeeMemberLee, Cin-Ty
dc.contributor.committeeMemberTorres, Mark
dc.creatorRodriguez, Maria Raquel
dc.date.accessioned2024-05-20T20:20:33Z
dc.date.created2024-05
dc.date.issued2024-03-20
dc.date.submittedMay 2024
dc.date.updated2024-05-20T20:20:33Z
dc.descriptionEMBARGO NOTE: This item is embargoed until 2025-05-01
dc.description.abstractIntraplate settings almost uniquely host alkaline magmas and carbonatites. Although these magmas are spatially connected, the petrogenetic link between alkali magmas such as ocean island basalts (OIBs) and carbonatites is not well established. While previous studies have sought to identify the source origin of these magmas, the mechanisms behind their differentiation remain poorly understood. To constrain the evolution of alkalic magmas at mid-lithospheric depths, we performed high pressure-temperature, phase equilibria experiments on a hydrous, CO2 rich mantle-derived partial melt composition. The experiments were conducted at 1.5-2.0 GPa and 1200-1500 °C. The experimentally generated samples were studied using electron probe micro-analysis, where phase assemblage consisted of olivine + clinopyroxene + spinel + carbonated-silicate melt ± calcite ± vapor. As the melt composition undergoes evolution, the initial stages of crystallization generate alkalic OIB-like compositions, which subsequently transition towards natural calcio-magnesio carbonatite compositions. Our findings suggest that a single volatile-rich parental melt composition can give rise to OIBs and carbonatites at varying conditions.
dc.embargo.lift2025-05-01
dc.embargo.terms2025-05-01
dc.format.mimetypeapplication/pdf
dc.identifier.citationRodriguez, Maria. Differentiation of a CO2-rich, hydrous alkalic basalt and the genesis of carbonatites. (2024). Masters thesis, Rice University. https://hdl.handle.net/1911/115918
dc.identifier.urihttps://hdl.handle.net/1911/115918
dc.language.isoeng
dc.rightsCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.
dc.subjectexperimental petrology
dc.subjectcarbonatites
dc.subjectmagma evolution
dc.subjectalkaline magmas
dc.subjectintraplate settings
dc.subjecthigh temperature
dc.titleDifferentiation of a CO2-rich, hydrous alkalic basalt and the genesis of carbonatites
dc.typeThesis
dc.type.materialText
thesis.degree.departmentEarth Science
thesis.degree.disciplineNatural Sciences
thesis.degree.grantorRice University
thesis.degree.levelMasters
thesis.degree.nameMaster of Science
Files
License bundle
Now showing 1 - 2 of 2
No Thumbnail Available
Name:
PROQUEST_LICENSE.txt
Size:
5.84 KB
Format:
Plain Text
Description:
Download
No Thumbnail Available
Name:
LICENSE.txt
Size:
2.98 KB
Format:
Plain Text
Description:
Download
Collections
Rice University Electronic Theses and Dissertations