Supercooled rocks: development and significance of varioles, spherulites, dendrites and spinifex in Archaean volcanic rocks, Abitibi Greenstone belt, Canada

Fowler, Anthony D.; Berger, B.; Shore, Mark; Jones, Murray Ira.; Ropchan, J. R.

doi:10.1016/s0301-9268(02)00014-1

Cited by 66 publications

(47 citation statements)

References 32 publications

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“…The typical morphological variation is from a spherulite-rich margin to a microlite-rich core, but Fowler et al (2002) suggest that some tubes and large pillows can have varioles concentrated toward pillow centers, similar to those observed (Figure 20). Moreover, Fowler et al (1986) suggested that plagioclase spherulites formed because of pronounced undercooling from a superheated basaltic melt.…”

Section: Discussionsupporting

confidence: 76%

“…Additional support for a proximal setting for pillow lavas mapped in the New Bidlamaque region (Figures 10 and 11) is the presence of varioles and aphyric nature, which are indicative of high temperature lava. Varioles observed within pillow margins are similar to those described by Gélinas et al (1976) and are probably composed of spherulites of acicular plagioclase originating from a central point (Fowler et al, 2002).…”

Section: Discussionsupporting

confidence: 72%

“…These spherulites are considered the result of crystallization as they are parallel to the cooling contact (Lofgren, 1971;Davis and McPhie, 1996) (Figure 20) and become progressively larger towards pillow interiors (Fowler et al, 2002). The typical morphological variation is from a spherulite-rich margin to a microlite-rich core, but Fowler et al (2002) suggest that some tubes and large pillows can have varioles concentrated toward pillow centers, similar to those observed (Figure 20).…”

Section: Discussionmentioning

confidence: 69%

“…The formation of varioles provides further support for contemporaneous emplacement. The cooling effect of water along the contact facilitates the growth of varioles or they may represent immiscible mixing between the sediment and magma (Fowler et al, 2002).…”

Section: Interpretation Oftex-sol Areamentioning

confidence: 99%

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Physical volcanology, stratigraphy, and lithogeochemistry of an archean volcanic arc :

Scott¹

2005

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Section: Discussionsupporting

confidence: 76%

Section: Discussionsupporting

confidence: 72%

Section: Discussionmentioning

confidence: 69%

Section: Interpretation Oftex-sol Areamentioning

confidence: 99%

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Physical volcanology, stratigraphy, and lithogeochemistry of an archean volcanic arc :

Scott¹

2005

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“…Manley, 1992). One exception for glass devitrification (in response to heating to 250-700°C and the presence of an alkali-rich fluid phase; Lofgren, 1971a) could be later hydrothermal-fluid circulation during vesicle-filling (Fowler et al, 2002). Within the Loskop…”

Section: Cooling Historymentioning

confidence: 99%

Volcanism of the Palaeoproterozoic Bushveld Large Igneous Province: The Rooiberg Group, Kaapvaal Craton, South Africa

Lenhardt

Eriksson

2012

Precambrian Research

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Self‐assembled small molecule spherulites under mild conditions: High solid‐state quantum yield and unique interconnected structural and fluorescent colors

Li,

Arteaga,

Ehlers

et al. 2024

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Spherulites are generally fabricated from cooling polymer melts, while their fabrication under mild conditions or from small molecule materials has been barely reported. Besides, organic luminescent molecules typically suffer from low quantum yields in a solid state. Moreover, preparing material with interconnected and simultaneous changes in structural and fluorescent colors is challenging. Here, we present the first solution‐derived spherulites with unique interconnected structural and fluorescent colors, self‐assembled from stearoylated monosaccharides at room temperature. D‐galactose stearoyl ester self‐assembled into banded spherulites, containing twisted nanoplates and interconnected simultaneously changing structural and fluorescent colors. In comparison, D‐mannose stearoyl ester can only form non‐banded spherulites, which contain oriented nanoplates and uniform structural and fluorescent colors. Such materials revealed a novel negative correlation between fluorescence and birefringence, termed alignment‐promoted quenching propensity. Remarkably, the solid‐state fluorescence quantum yields of galactose and mannose‐derived spherulites are as high as 49 ± 2% and 51 ± 2% respectively, approximately ten times higher than those of unmodified monosaccharides. These quantum yield values are among the highest of reported organic nonconventional fluorophores and even comparable to those of conventional aromatic chromophores. Moreover, these spherulites manifested an unexpected excitation‐dependent multicolor photoluminescence with a broad‐spectrum emission (410−620 nm). They show multiple peaks in the photoluminescent emission spectra and broad fluorescence lifetime distributions, which should be attributed to the clustering of a variety of oxygen‐containing functional groups as emissive moieties.

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Supercooled rocks: development and significance of varioles, spherulites, dendrites and spinifex in Archaean volcanic rocks, Abitibi Greenstone belt, Canada

Cited by 66 publications

References 32 publications

Physical volcanology, stratigraphy, and lithogeochemistry of an archean volcanic arc :

Physical volcanology, stratigraphy, and lithogeochemistry of an archean volcanic arc :

Volcanism of the Palaeoproterozoic Bushveld Large Igneous Province: The Rooiberg Group, Kaapvaal Craton, South Africa

Self‐assembled small molecule spherulites under mild conditions: High solid‐state quantum yield and unique interconnected structural and fluorescent colors

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