Recent Work on Oscillatory Zoning in Plagioclase

Pearce, T. H.

doi:10.1007/978-94-011-1106-5_8

Cited by 42 publications

(38 citation statements)

References 32 publications

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“…It is characterized [63,64] by variations in the anorthite content of typically 5-15% over a scale of tens to hundreds of micrometres. By plotting the thickness of one zone as a function of the previous one (first-return map), Higman & Pearce [64] suggested that an intrinsic dynamics is at least partly responsible for the formation of OZ, without precluding the influence of systematic or random changes in the external growth conditions.…”

Section: Oscillatory Zoning Patternsmentioning

confidence: 99%

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Self-organized rhythmic patterns in geochemical systems

L’Heureux

2013

Phil. Trans. R. Soc. A.

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Chemical oscillating patterns are ubiquitous in geochemical systems. Although many such patterns result from systematic variations in the external environmental conditions, it is recognized that some patterns are due to intrinsic self-organized processes in a non-equilibrium nonlinear system with positive feedback. In rocks and minerals, periodic precipitation (Liesegang bands) and oscillatory zoning constitute good examples of patterns that can be explained using concepts from nonlinear dynamics. Generally, as the system parameters exceed some threshold values, the steady (time-independent) state characterizing the system loses its stability. The system then evolves towards other time-dependent solutions (‘attractors’) that may have an oscillatory behaviour or a complex chaotic one. In this review, we describe many of these pattern types taken from a variety of geological environments: eruptive, sedimentary, hydrothermal or metamorphic. One particular example (periodic precipitation of pyrite bands in an evolving sapropel sediment) is presented here for the first time. This will help in convincing the reader that the tools of nonlinear dynamics may be useful to understand the history of our planet.

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Section: Oscillatory Zoning Patternsmentioning

confidence: 99%

“…OZ in plagioclase occurs often in far-from-equilibrium conditions (large undercooling) [63]. L'Heureux and co-workers [71][72][73] have proposed an isothermal nonlinear model of OZ in plagioclase for such a situation.…”

Section: Oscillatory Zoning Patternsmentioning

confidence: 99%

Self-organized rhythmic patterns in geochemical systems

L’Heureux

2013

Phil. Trans. R. Soc. A.

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“…There is a large literature on oscillatory zoning and its origin in igneous minerals, especially plagioclase (see reviews by Pearce 1994;Shore and Fowler 1996). Although often attributed to external factors such as variations in temperature or pressure, magma composition, P H 2 O ; etc.…”

Section: P Contents Of Igneous Olivines: Comparison To the Literaturementioning

confidence: 99%

“…Although this would result in a zone of high-P olivine overgrown by low-P olivine, something else must occur to stimulate another phase of rapid olivine growth so as to produce oscillatory zoning. Examples of how non-linearities resulting in oscillatory behavior might be introduced into the system include dependence of growth rate on the composition of the crystalline phase or on the structure of the interface and its temporal evolution, variations in the diffusivities of cations in the melt as a function of liquid composition, time dependence of the degree of constitutional supercooling of the liquid at the crystal interface, and convective instability of the liquid boundary layer (see reviews by Pearce 1994;Shore and Fowler 1996).…”

Section: P Contents Of Igneous Olivines: Comparison To the Literaturementioning

confidence: 99%

Final Report for "Experimental Petrology and Chemistry of Volatile-Bearing Silicate Melts"

Stolper¹

2013

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“…Of special interest in magmatic systems is compositional zoning in plagioclase which has two characteristic scales [28]. Type I zoning is smallscale, generally in the range 1^10 Wm, and has been shown to be the result of a deterministic process [26].…”

Section: Crystal Zoningmentioning

confidence: 99%