A spatial statistics approach to the quantification of finite strain variation in penetratively deformed thrust sheets: an example from the Sheeprock Thrust Sheet, Sevier Fold-and-Thrust belt, Utah
IR@C-MMACS: CSIR-Centre for Mathematical Modelling and Computer Simulation, Bangalore
View Archive Info| Field | Value | |
| Title |
A spatial statistics approach to the quantification of finite strain variation in
penetratively deformed thrust sheets: an example from the Sheeprock Thrust Sheet,
Sevier Fold-and-Thrust belt, Utah
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| Creator |
Mukul, Malay
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| Subject |
Computational Seismology
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| Description |
Strain is an important component of the total displacement field in the emplacement of a thrust sheet.
The finite strain tensor in a penetratively deformed thrust sheet is a spatial variable. I describe a method for
quantitative estimation of the finite strain variation in thrust sheets by applying spatial statistics analysis on strain
data collected from a part of the Sheeprock thrust sheet, in the southern Sheeprock Mountains and the West Tintic
Mountains, north-central Utah. Strain was measured in the quartzites of the Sheeprock thrust sheet and the spatial
statistics method is illustrated using the X/Z strain axial ratios.
The Sheeprock thrust sheet was penetratively deformed during Sevier-age fault propagation folding. I quantified
finite strain from quartzites using the modified normalized Fry method and calculated the three-dimensional strain
ellipsoid from the quartzites using three orthogonal thin-sections from each oriented field sample. The variation of
finite strain in the Sheeprock thrust sheet was best represented by an exponential semivariogram model, which I
used to predict values of strain from unsampled locations by ordinary kriging. Cross-validation showed that, in
general, the predicted and measured values show good agreement (within 1% ofeach other). The sampled space was
contoured using the measured and predicted strain values to obtain a detailed finite strain variation pattern in a part
of the Sheeprock thrust sheet.
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| Publisher |
Elsevier Science Ltd
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| Date |
1998
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cir.cmmacs.ernet.in/286/1/Mukul1998.pdf
Mukul, Malay (1998) A spatial statistics approach to the quantification of finite strain variation in penetratively deformed thrust sheets: an example from the Sheeprock Thrust Sheet, Sevier Fold-and-Thrust belt, Utah. Journal Of Structural Grology,, 20 (4). pp. 371-384. |
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| Relation |
http://cir.cmmacs.ernet.in/286/
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