### 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} - %S_{XRD})/%S_{MAX}. 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 language | English |
---|---|

Pages (from-to) | 319-327 |

Number of pages | 9 |

Journal | Clay Minerals |

Volume | 47 |

Issue number | 3 |

DOIs | |

Publication status | Published - 2012 Sep 1 |

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### All Science Journal Classification (ASJC) codes

- Geochemistry and Petrology

### Cite this

*Clay Minerals*,

*47*(3), 319-327. https://doi.org/10.1180/claymin.2012.047.3.03

}

*Clay Minerals*, vol. 47, no. 3, pp. 319-327. https://doi.org/10.1180/claymin.2012.047.3.03

**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.

Research output: Contribution to journal › Article

TY - JOUR

T1 - Relative coherent stacking potential of fundamental particles of illite-smectite and its relationship to geological environment

AU - Kang, Il Mo

AU - Hillier, S.

AU - Song, Yun Goo

AU - Kim, In Joon

PY - 2012/9/1

Y1 - 2012/9/1

N2 - 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).

AB - 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).

UR - http://www.scopus.com/inward/record.url?scp=84874029577&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84874029577&partnerID=8YFLogxK

U2 - 10.1180/claymin.2012.047.3.03

DO - 10.1180/claymin.2012.047.3.03

M3 - Article

VL - 47

SP - 319

EP - 327

JO - Clay Minerals

JF - Clay Minerals

SN - 0009-8558

IS - 3

ER -