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NARROW
GeoRef Subject
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all geography including DSDP/ODP Sites and Legs
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Africa
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North Africa
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Egypt
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Sinai Egypt (2)
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Southern Africa
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Primary terms
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absolute age (29)
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Africa
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Egypt
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Sinai Egypt (2)
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Southern Africa
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Asia
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Far East
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China
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Japan
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Korea
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Kyrgyzstan (1)
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Middle East
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Syria (1)
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Turkey
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North Anatolian Fault (1)
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-
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Tibetan Plateau (1)
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Tien Shan
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Alai Range (1)
-
-
-
Atlantic Ocean
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North Atlantic
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Caribbean Sea
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Venezuelan Basin (1)
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-
Gulf of Mexico
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Eugene Island Block 330 Field (1)
-
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North Sea
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Gullfaks Field (1)
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Troll Field (1)
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Viking Graben (1)
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-
-
-
Atlantic Ocean Islands
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Shetland Islands (1)
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Australasia
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Taupo volcanic zone (1)
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bitumens
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brines (2)
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Canada
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carbon
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Caribbean region
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Cenozoic
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Quaternary
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Holocene
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upper Holocene (1)
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Pleistocene
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middle Pleistocene (1)
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Tertiary
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Cypress Hills Formation (1)
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lower Tertiary (1)
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Neogene
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Paleogene
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lower Eocene (2)
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upper Cenozoic (2)
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Alps
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Central Europe
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Swiss Alps
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Betic Cordillera (3)
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Malta (1)
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gouge
Syncing fault rock clocks: Direct comparison of U-Pb carbonate and K-Ar illite fault dating methods
Discussion on ‘Fault seal modelling – the influence of fluid properties on fault sealing capacity in hydrocarbon and CO 2 systems’, Petroleum Geoscience , 2020, https://doi.org/10.1144/petgeo2019-126
Using Monte Carlo models to predict hydrocarbon column heights and to illustrate how faults influence buoyant fluid entrapment
An analysis of the factors that control fault zone architecture and the importance of fault orientation relative to regional stress
Pulverized quartz clasts in gouge of the Alhama de Murcia fault (Spain): Evidence for coseismic clast pulverization in a matrix deformed by frictional sliding
Fault surface development and fault rock juxtaposition along deformation band clusters in porous sandstones series
Clay mineral dating of displacement on the Sronlairig Fault: implications for Mesozoic and Cenozoic tectonic evolution in northern Scotland
Flow pathway and evolution of water and oil along reverse faults in the northwestern Sichuan Basin, China
Numerical models for slip on the subduction interface motivated by field observations
Contrasting Structural Styles of Orogenic Gold Deposits, Reefton Goldfield, New Zealand
Micro- and nano-scale study of deformation induced mineral transformations in Mg-phyllosilicate-rich fault gouges from the Galera Fault Zone (Betic Cordillera, SE Spain)
Fault gouge dating: history and evolution
Undrained Gouge Plasticity Stabilizes Rupture Dynamics of Rough Faults
QUANTITATIVE X-RAY POWDER DIFFRACTION AND THE ILLITE POLYTYPE ANALYSIS METHOD FOR DIRECT FAULT ROCK DATING: A COMPARISON OF ANALYTICAL TECHNIQUES
A new interpretation for the nature and significance of mirror-like surfaces in experimental carbonate-hosted seismic faults
Fault core process and clay content derived from XRF analysis: Salina Creek Fault, Utah
Abstract The distribution of fault rocks interpreted across a modelled fault in oil or gas reservoirs is most often described by its clay content derived from standard industry algorithms such as shale gouge ratio and clay smear factor. These distributions are below the mapping resolution in seismic data, and the actual processes and mechanisms for the fault-rock development are not well understood. A well-exposed and well-preserved low-throw fault in an old railroad tunnel near Salina, Utah provides the access and scale to interpret fault-rock distributions, measure their clay contents and describe the fault-rock development. A significant number of fault-rock elemental compositions were measured quickly on the outcrop surface using a hand-held X-ray fluorescence (XRF) elemental analyser with a novel surface preparation and analysis strategy. The elemental data were converted to clay contents using a small set of samples where elemental composition was calibrated to X-ray diffraction mineralogy. The mineralogy data provide a basis for evaluating the degree of mixing of protolith beds during fault-rock development in the fault core. The fault core is not randomly mixed fragments derived from the protolith (gouge or breccia), but rather discrete, thin layers parallel to the fault surface, many of which can be traced back to a source sandstone or mudstone bed. The mineralogical composition of some fault-rock layers are unchanged from their protolith source bed, but other layers are mechanical mixtures of several source beds. The shale gouge ratio algorithm under-represents the average measured fault-rock clay content. The clay smear algorithm more accurately describes the clay content distribution, but underestimates the clay content heterogeneity along the smear length. A key uncertainty for predicting fault sealing remains prediction of the lengths and continuity of smears.
The relationship between mineralization and tectonics at the Kainantu gold–copper deposit, Papua New Guinea
Abstract Epithermal veins and breccias at the Kainantu gold–copper deposit in Papua New Guinea, host gold mineralization in NW–SE steeply dipping lodes. The lodes are parallel to a pre-mineralization dextral strike-slip shear-zone network, which is itself parallel in places to an early greenschist-facies cleavage in basement schists. The cleavage, shear zone and veins are all cut by dextral strike-slip faults. High Au grades correlate with areas of obliquity between the shear-zone fabrics and the cleavage, and plunge at approximately 40° SE in the plane of the lodes – coincident with minor fold axes related to a crenulation cleavage in the basement rocks. This clear structural history shows that gold mineralization was confined to a particular late structural event, but lode geometry was influenced by all previous structures, as well as being displaced by post-mineralization faulting. The north–south shortening recorded through most of the tectonic history can be related to Tertiary convergence along the major plate boundary located approximately 15 km north of the mine. However, mineralization occurred under a different tectonic regime from the current north–south convergence, when there was a change of tectonics between 9 and 6 Ma, possibly related to delamination.