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Titanite low-temperature alteration and Ti mobility

Tilley, David; Eggleton, Richard

Description

A pseudomorphous aggregate after titanite composed of smectite, anatase and residual titanite of composition (Ca0.98,Mn0.02)(Ti0.65,Al0.35)[SiO4](O0.65,OH0.35), from a depth of 450 m in the Broken Hill South Mine, New South Wales, Australia, was investigated by electron microscopy and microanalysis to characterize the alteration products and the mobility of Ti. Examination of the pseudomorph showed randomly oriented anatase crystals dispersed throughout a matrix of beidellite, with 9% porosity....[Show more]

dc.contributor.authorTilley, David
dc.contributor.authorEggleton, Richard
dc.date.accessioned2015-12-13T23:02:11Z
dc.identifier.issn0009-8604
dc.identifier.urihttp://hdl.handle.net/1885/84776
dc.description.abstractA pseudomorphous aggregate after titanite composed of smectite, anatase and residual titanite of composition (Ca0.98,Mn0.02)(Ti0.65,Al0.35)[SiO4](O0.65,OH0.35), from a depth of 450 m in the Broken Hill South Mine, New South Wales, Australia, was investigated by electron microscopy and microanalysis to characterize the alteration products and the mobility of Ti. Examination of the pseudomorph showed randomly oriented anatase crystals dispersed throughout a matrix of beidellite, with 9% porosity. Around the periphery and along the (110) cleavage plane of titanite, alteration was most developed. The range of Ti mobility was found to be limited to ∼500 nm, and the ratio between the average diameter of anatase crystals and the average distance between them is ∼1.3. This ratio is consistent with an alteration process in which Ti is conserved and the anatase crystals grow from the Ti available immediately around them. It is unlikely that Ti migrated beyond the titanite pseudomorph.
dc.publisherClay Minerals Society
dc.sourceClays and Clay Minerals
dc.subjectKeywords: Aggregates; Crystal growth; Crystals; Porosity; Titanium compounds; Transmission electron microscopy; Anatase crystals; Beidellite; Low temperature alteration; Titanite; Clay minerals; mineral alteration; titanite; Pseudomorpha Aluminous titanite; Anatase; Beidellite; Mobility; Montmorillonite; Smectite; Sphene; Titanium
dc.titleTitanite low-temperature alteration and Ti mobility
dc.typeJournal article
local.description.notesImported from ARIES
local.description.refereedYes
local.identifier.citationvolume53
dc.date.issued2005
local.identifier.absfor040304 - Igneous and Metamorphic Petrology
local.identifier.ariespublicationMigratedxPub13022
local.type.statusPublished Version
local.contributor.affiliationTilley, David, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationEggleton, Richard, College of Physical and Mathematical Sciences, ANU
local.description.embargo2037-12-31
local.bibliographicCitation.issue1
local.bibliographicCitation.startpage100
local.bibliographicCitation.lastpage107
local.identifier.doi10.1346/CCMN.2005.0530110
dc.date.updated2015-12-12T07:45:32Z
local.identifier.scopusID2-s2.0-16344395190
CollectionsANU Research Publications

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