The zeolite facies, with comments on the interpretation of hydrothermal syntheses

Coombs, D. S.; Ellis, A. J.; Fyfe, W. S.; Taylor, Aaron

doi:10.1016/0016-7037(59)90079-1

Cited by 393 publications

(143 citation statements)

References 45 publications

Supporting

Mentioning

130

Contrasting

Unclassified

Order By: Relevance

“…4) and space (Fig. 3) was interpreted by Fleming (1970) to mean that the sediments accumulated in small basins of rapid subsidence, and that loci of subsidence migrated up and down the axis of the major basin, a view first put forward by Coombs et al (1959). This concept has much in its favour, and the possibility of separate, but chronologically overlapping, basins or wedges of sediment is suggested by other lines of evidence, but it should be remembered that sedimentary basins are merely sites of more rapid sediment accumulation and may be neither bathymetric lows nor areas of unusually rapid subsidence.…”

Section: General Conclusionmentioning

confidence: 98%

Lithological and paleontological content of the Carboniferous-Jurassic Canterbury Suite, South Island, New Zealand

Andrews¹,

Speden²,

Bradshaw³

1976

New Zealand Journal of Geology and Geophysics

View full text Add to dashboard Cite

The late Paleozoic and Mesozoic quartzo-feldspathic Canterbury Suite contains a wide range of detrital lithotypes and facies, representing many depositional environments. The stratification, sedimentary structures, and fossils characteristic of 11 lithotypes are described and interpreted in terms of probable depositional environments.Fifteen recognisable faunal zones represent only part of the total time span of the Canterbury Suite (Carboniferous to late Jurassic). There is no record of early Permian, latest Permian and early Triassic, or latest Triassic through middle Jurassic, except for a single collection representing the Ururoan Stage (early Jurassic). All but two of the faunal assemblages consist mainly of epifaunal and nektonic species of low abundance and diversity. Infaunal species are virtually absent. The assemblages are characteristic of continental shelf environments.Marginal marine and non-marine depositional environments, coarse detrital conglomerates, and vascular plant material are common in the eastern part of the outcrop area. Thev become less abundant towards the west, and in the extreme west of the outcrop area, conglomerate is essentially absent, plant fossils very sparse, and probable deep marine facies relatively common. These trends show that the detritus was transported from east to west, and that the source rocks lay east of present-day New Zealand. Conglomerate and sandstone composition shows that during Triassic time the source area consisted of granodiorite and minor schistose and gneissic metamorphic rocks, but that by late Jurassic time acid volcanic rocks were also abundant.

show abstract

Section: General Conclusionmentioning

confidence: 98%

Lithological and paleontological content of the Carboniferous-Jurassic Canterbury Suite, South Island, New Zealand

Andrews¹,

Speden²,

Bradshaw³

1976

New Zealand Journal of Geology and Geophysics

View full text Add to dashboard Cite

show abstract

“…These are the rate at which the sodium aluminate solution is added to the sodium silicate solution (13), anion activation (14,15,16), the source of Si0 2 (17), and the reaction temperature (10). It has been found that the effect of these variables is most pronounced when synthesizing higher Si0 2 /Al 2 0 3 ratio zeolites, such as X and Y.…”

Section: Resultsmentioning

confidence: 99%

Factors Influencing the Synthesis of Zeolites A, X, and Y

Kostinko

1983

ACS Symposium Series

View full text Add to dashboard Cite

The synthesis of zeolite A, mixtures of A and X, and zeolite X using batch compositions not previously reported are described. The synthesis regions defined by triangular coordinates demonstrate that any of these materials may be made in the same area. The results are described in terms of the time required to initiate crystallization at a given reaction temperature. Control of the factors which can influence the crystallization time are discussed in terms of "time table selectors" and "species selectors".Once a metastable species has preferentially crystallized, it can transform to a more stable phase. For example, when synthesis conditions are chosen to produce zeolite A, the rate of hydroxysodalite formation is dependent on five variables. These variables and their effect on the conversion of zeolite A to hydroxysodalite are described mathematically.Review of the literature and existing patents indicates that the state of the art restricts the formation of a given zeolite to a specific batch composition range (1-9). Convention also implies that the use of triangular coordinate graphics to depict mole percent Na2O, SiO2 and Al2O3 in the batch indicates which species of zeolite will form. Figure 1 represents a composite of patented batch compositions for the synthesis of zeolites A, X and Y. It should be noted that batch composition ranges shown for the different zeolites never overlap. Although this concept has been used in the past, it does not reliably predict results. This is demonstrated by the experimental data plotted on Figure 2 which shows the composition ranges which can be used to prepare zeolite A (A-B-C-D), X (A-E-F-G) and mixtures of A and X in the same batch (H-I-J-K). These ranges not only overlap, they also extend into areas previously designated for preparing zeolite Y. The data on

show abstract

“…The quartz-rich sedimentary environment in the Stewart Island conglomerate evidently favoured the crystallisation of these silica-rich zeolites, whereas at Bluff Hill, decomposition and solution of calcic plagioclase and possibly olivine promoted the crystallisation of a suite of low-silica zeolites (cf. Coombs et al 1959). …”

Section: Discussionmentioning

confidence: 99%

Foveaux Formation: A warm-water, strandline deposit of Landon-Pareora age at Bluff Hill, Southland, New Zealand

Bosel

Coombs

1984

New Zealand Journal of Geology and Geophysics

View full text Add to dashboard Cite

The zeolite facies, with comments on the interpretation of hydrothermal syntheses

Cited by 393 publications

References 45 publications

Lithological and paleontological content of the Carboniferous-Jurassic Canterbury Suite, South Island, New Zealand

Lithological and paleontological content of the Carboniferous-Jurassic Canterbury Suite, South Island, New Zealand

Factors Influencing the Synthesis of Zeolites A, X, and Y

Foveaux Formation: A warm-water, strandline deposit of Landon-Pareora age at Bluff Hill, Southland, New Zealand

Contact Info

Product

Resources

About