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dc.contributor.advisor Lee, Cin-Ty A.
dc.creatorLiao, Kelley
dc.date.accessioned 2013-07-24T19:35:38Z
dc.date.accessioned 2013-07-24T19:35:42Z
dc.date.available 2013-07-24T19:35:38Z
dc.date.available 2013-07-24T19:35:42Z
dc.date.created 2012-12
dc.date.issued 2013-07-24
dc.date.submitted December 2012
dc.identifier.urihttps://hdl.handle.net/1911/71667
dc.description.abstract Dark enclaves rich in amphibole and biotite are ubiquitous in granitoid rocks and generally thought to represent fragments of mafic magmas, cumulates or restites. However, magmatic assimilation of metamorphic or sedimentary country rock can also form dark enclaves. To develop criteria for identifying dark enclaves of non-magmatic origin, we investigated dark enclaves from a complete spectrum of light (carbonate- or feldspar-rich) to dark (amphibole-rich, biotite-rich, or composite) enclaves, reflecting progressive thermal and chemical equilibration with host tonalite from the Domenigoni Valley pluton in the Peninsular Ranges Batholith, California. Metasedimentary dark enclaves have a number of major and trace element characteristics that overlap those of literature-compiled igneous dark enclaves. Comparison to modeled igneous differentiation paths shows metasedimentary enclaves can have anomalous CaO and K2O contents for a given SiO2, but other major element systematics may not deviate noticeably from igneous differentiation trends. In addition, the fact that there are literature-compiled mafic enclaves trending towards high K2O and high CaO suggests that not all mafic enclaves are of igneous origin. While the majority of dark enclaves may not be metasedimentary, this work provides some criteria for identifying enclaves should a case of metasedimentary origin arise.
dc.format.mimetype application/pdf
dc.language.iso eng
dc.subjectDark enclaves
Metasedimentary
Protolith
Wall rock assimilation
Metamorphism
dc.title Geochemical Diagnostics of Metasedimentary Dark Inclusions: a Case Study from the Peninsular Ranges Batholith, California
dc.contributor.committeeMember Dasgupta, Rajdeep
dc.contributor.committeeMember Lenardic, Adrian
dc.date.updated 2013-07-24T19:35:43Z
dc.identifier.slug 123456789/ETD-2012-12-270
dc.type.genre Thesis
dc.type.material Text
thesis.degree.department Earth Science
thesis.degree.discipline Natural Sciences
thesis.degree.grantor Rice University
thesis.degree.level Masters
thesis.degree.name Master of Science
dc.identifier.citation Liao, Kelley. "Geochemical Diagnostics of Metasedimentary Dark Inclusions: a Case Study from the Peninsular Ranges Batholith, California." (2013) Master’s Thesis, Rice University. https://hdl.handle.net/1911/71667.


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