Relative coherent stacking potential of fundamental particles of illite-smectite and its relationship to geological environment

Il Mo Kang, S. Hillier, Yun Goo Song, In Joon Kim

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Interstratified illite-smectite (I-S) occurring authigenically in diverse earth crust environments reacts toward more illite-rich phases as temperature increases. For that reason, I-S is used for geothermometry when prospecting for hydrocarbons or ore mineral deposits. This study develops the mathematical relations for characterizing the coherent stacking potential of fundamental particles (FP) using the expandability ratio K, where K is defined as (%S MAX - %SXRD)/%SMAX. The ratio can be applied to differentiating I-S samples from shales, bentonites, and hydrothermal alterations. In particular, patterns on a K vs. T diagram, where T is the average thickness of fundamental particles (FPs), appear to be indicative of the geological conditions related to I-S formation. Shale samples plot in the negative K domain of the diagram, possibly due to the intimate mixing of detrital particles. Both bentonitic and hydrothermal samples display trends of increasing K with T, which suggests the coherent stacking potential progressively decreases as FPs increase in thickness. Hydrothermal samples are more extensively distributed on the diagram than samples from bentonites. This result may reflect differences in particle growth conditions (nutrients and space) between bentonites (short supply) and hydrothermal alterations (good supply).

Original languageEnglish
Pages (from-to)319-327
Number of pages9
JournalClay Minerals
Volume47
Issue number3
DOIs
Publication statusPublished - 2012 Sep 1

Fingerprint

fundamental particle
stacking
illite
smectite
diagram
hydrothermal alteration
geothermometry
Mineral resources
ore mineral
mineral deposit
Shale
Hydrocarbons
Ores
Nutrients
shale
Earth (planet)
Smectite
hydrocarbon
nutrient

All Science Journal Classification (ASJC) codes

  • Geochemistry and Petrology

Cite this

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abstract = "Interstratified illite-smectite (I-S) occurring authigenically in diverse earth crust environments reacts toward more illite-rich phases as temperature increases. For that reason, I-S is used for geothermometry when prospecting for hydrocarbons or ore mineral deposits. This study develops the mathematical relations for characterizing the coherent stacking potential of fundamental particles (FP) using the expandability ratio K, where K is defined as ({\%}S MAX - {\%}SXRD)/{\%}SMAX. The ratio can be applied to differentiating I-S samples from shales, bentonites, and hydrothermal alterations. In particular, patterns on a K vs. T diagram, where T is the average thickness of fundamental particles (FPs), appear to be indicative of the geological conditions related to I-S formation. Shale samples plot in the negative K domain of the diagram, possibly due to the intimate mixing of detrital particles. Both bentonitic and hydrothermal samples display trends of increasing K with T, which suggests the coherent stacking potential progressively decreases as FPs increase in thickness. Hydrothermal samples are more extensively distributed on the diagram than samples from bentonites. This result may reflect differences in particle growth conditions (nutrients and space) between bentonites (short supply) and hydrothermal alterations (good supply).",
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Relative coherent stacking potential of fundamental particles of illite-smectite and its relationship to geological environment. / Kang, Il Mo; Hillier, S.; Song, Yun Goo; Kim, In Joon.

In: Clay Minerals, Vol. 47, No. 3, 01.09.2012, p. 319-327.

Research output: Contribution to journalArticle

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