Imperial College London
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Professor Christopher Jackson

Faculty of Engineering, Department of Earth Science & Engineering

Visiting Professor
 
 
 
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Contact

 

c.jackson Website

 
 
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Location

 

1.46ARoyal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Wrona:2017:10.1002/2016GC006482,
author = {Wrona, T and Taylor, KG and Jackson, CA-L and Huuse, M and Najorka, J and Pan, I},
doi = {10.1002/2016GC006482},
journal = {Geochemistry Geophysics Geosystems},
pages = {1537--1549},
title = {Impact of silica diagenesis on the porosity of fine-grained strata: an analysis of Cenozoic mudstones from the North Sea},
url = {http://dx.doi.org/10.1002/2016GC006482},
volume = {18},
year = {2017}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Silica diagenesis has the potential to drastically change the physical and fluid flow properties of its host strata and therefore plays a key role in the development of sedimentary basins. The specific processes involved in silica diagenesis are, however, still poorly explained by existing models. This knowledge gap is addressed by investigating the effect of silica diagenesis on the porosity of Cenozoic mudstones of the North Viking Graben, northern North Sea through a multiple linear regression analysis. First, we identify and quantify the mineralogy of these rocks by scanning electron microscopy and X-ray diffraction, respectively. Mineral contents and host rock porosity data inferred from wireline data of two exploration wells are then analyzed by multiple linear regressions. This robust statistical analysis reveals that biogenic opal-A is a significant control and authigenic opal-CT is a minor influence on the porosity of these rocks. These results suggest that the initial porosity of siliceous mudstones increases with biogenic opal-A production during deposition and that the porosity reduction during opal-A/CT transformation results from opal-A dissolution. These findings advance our understanding of compaction, dewatering, and lithification of siliceous sediments and rocks. Moreover, this study provides a recipe for the derivation of the key controls (e.g., composition) on a rock property (e.g., porosity) that can be applied to a variety of problems in rock physics.
AU  - Wrona,T
AU  - Taylor,KG
AU  - Jackson,CA-L
AU  - Huuse,M
AU  - Najorka,J
AU  - Pan,I
DO  - 10.1002/2016GC006482
EP  - 1549
PY  - 2017///
SN  - 1525-2027
SP  - 1537
TI  - Impact of silica diagenesis on the porosity of fine-grained strata: an analysis of Cenozoic mudstones from the North Sea
T2  - Geochemistry Geophysics Geosystems
UR  - http://dx.doi.org/10.1002/2016GC006482
UR  - http://onlinelibrary.wiley.com/doi/10.1002/2016GC006482/full
VL  - 18
ER  -
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