Show simple item record

dc.contributor.authorJamtveit, B.
dc.contributor.authorPutnis, Christine
dc.contributor.authorMalthe-Sørenssen, A.
dc.date.accessioned2017-01-30T11:47:45Z
dc.date.available2017-01-30T11:47:45Z
dc.date.created2016-09-12T08:36:54Z
dc.date.issued2009
dc.identifier.citationJamtveit, B. and Putnis, C. and Malthe-Sørenssen, A. 2009. Reaction induced fracturing during replacement processes. Contributions to Mineralogy and Petrology. 157 (1): pp. 127-133.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/15071
dc.identifier.doi10.1007/s00410-008-0324-y
dc.description.abstract

Replacement processes are common transformation mechanisms in minerals and rocks at a variety of conditions and scales. The underlying mechanisms are, in general, poorly understood, but both mechanical and chemical processes are thought to be important. Replacement of leucite (KAlSi2O6) by analcime (NaAlSi2 O6·H2O) is common in silica-poor igneous rocks. A 10% increase in volume is associated with the replacement process, and this generates stresses that eventually cause fracturing of the reacting leucite. Experimentally reacted leucite samples display characteristic fracturing patterns that include both spalling of concentric 'onion-skin'-like layers near the reacting interface and the formation of cross-cutting, often hierarchically arranged, sets of fractures that divide the remaining leucite into progressively smaller domains. These structures may explain the 'patchy' alteration patterns observed in natural leucite samples and similar, so-called, mesh-textures associated with the serpentinization of olivine grains during hydration of mafic or ultramafic rocks. They are also strikingly similar to larger scale patterns formed during spheroidal weathering processes. A simple discrete element model illustrates the mechanics that control the formation of such systems, and shows how these replacement processes may be accelerated due to the generation of new reactive surface area by hierarchical fracturing processes. © Springer-Verlag 2008.

dc.publisherSpringer
dc.titleReaction induced fracturing during replacement processes
dc.typeJournal Article
dcterms.source.volume157
dcterms.source.number1
dcterms.source.startPage127
dcterms.source.endPage133
dcterms.source.issn0010-7999
dcterms.source.titleContributions to Mineralogy and Petrology
curtin.departmentDepartment of Chemistry
curtin.accessStatusFulltext not available


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record