Molar-ratio and Harker diagrams in portraying the actual chemical variability of granitoid suites

Whitten, E. H. Timothy

doi:10.1144/gsjgs.153.1.0121

Cited by 7 publications

(2 citation statements)

References 18 publications

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“…Furthermore, there is even dispute on the nature and form of the representation of the data, especially in the use of Harker diagrams in discriminating between rival petrogenetic hypotheses (Whitten, 1996). Furthermore, there is even dispute on the nature and form of the representation of the data, especially in the use of Harker diagrams in discriminating between rival petrogenetic hypotheses (Whitten, 1996).…”

Section: Categorization By Mode 21mentioning

confidence: 99%

The Nature and Origin of Granite

Pitcher¹

1997

199

127

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Section: Categorization By Mode 21mentioning

confidence: 99%

The Nature and Origin of Granite

Pitcher¹

1997

199

127

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“…However, where components are conserved throughout crystallisation within certain basic igneous rocks, molar ratios with a common constant denominator were shown to display, accurately and unequivocally, the actual chemical variability (e.g., Nicholls 1988;Stanley and Russell 1989). Molar-ratio diagrams for some Australian Iand Ssuites seem to show chemical variations accurately, permitting quantitative objective testing of, say, the restite model (Whitten 1996). This technique for avoiding daunting closed-data problems deserves further examination, although, for many granites, lack of component conservation during crystallization may introduce difficulties.…”

Section: Inverse Models In Earth Sciencesmentioning

confidence: 96%

Forward and Inverse Models Over 70 Years

Whitten

2018

Handbook of Mathematical Geosciences

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The transition over 70 years from qualitative rock description to attempted quantitative description of rocks and rock bodies (inverse modelling) and testing of process models with observation data (forward models) are outlined. Dramatic increases of readily measured variables, combined with almost unlimited computing power, yielded a plethora of varied inverse models, but limited attention has been given to critical sampling, variance, closure, 'black swan', and nonlinear issues; recent approaches to closure problems hold promise. Especially for plutonic rocks, paucity of quantitative process modelling left exciting forward-modelling opportunities neglected. Resulting challenges ahead are anticipated. Keywords Sampling ⋅ Variance ⋅ Composition variability ⋅ Black swans Granite composition 37.1 Birth of IAMG in 1968 In many different ways, 1968 was an extraordinary year that rocked the world (cf., Kurlansky 2004). Some 20 enthusiasts gathered at the XXIII International Geological Congress in Prague's New Technical University, Czechoslovakia, to create the International Association for Mathematical Geology in exciting, but tragic, times. Soviet troops had occupied the city a couple of days previously; guns of encircling Soviet tanks pointed at the university, which was the centre for printing and disseminating news. Vistelius was elected first IAMG President and Krumbein 'Past President' (a designation he appreciated and found amusing!); both are fathers of geological models.

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The categories of granitic rocks: the search for a genetic typology

Pitcher

1997

The Nature and Origin of Granite

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Molar-ratio and Harker diagrams in portraying the actual chemical variability of granitoid suites

Cited by 7 publications

References 18 publications

The Nature and Origin of Granite

The Nature and Origin of Granite

Forward and Inverse Models Over 70 Years

The categories of granitic rocks: the search for a genetic typology

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