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GeoRef Categories
Era and Period
Epoch and Age
Book Series
Date
Availability
flower structures
Hematite accommodated shallow, transient Pleistocene slow slip in the exhumed southern San Andreas fault system, California, USA Available to Purchase
Oceanic strike-slip faults represent active fluid conduits in the abyssal sub-seafloor Open Access
A new geological map and review of the Middle Devonian rocks of Westray and Papa Westray, Orkney, Scotland Available to Purchase
Sparse 3D seismic and magnetic imaging at Escondida porphyry copper mine, Chile Available to Purchase
Flower structures in sandstones of the Paleozoic Inkisi Group (Brazzaville, Republic of Congo): evidence for two major strike-slip fault systems and geodynamic implications Available to Purchase
Coseismic surface rupture during the 2018 Mw 7.5 Palu earthquake, Sulawesi Island, Indonesia Available to Purchase
Architectural characterization of Ordovician fault-controlled paleokarst carbonate reservoirs, Tahe oilfield, China Available to Purchase
Hydrocarbon-bearing characteristics of the SB1 strike-slip fault zone in the north of the Shuntuo Low Uplift, Tarim Basin Available to Purchase
Plio-Quaternary transpressive tectonics: a key factor in the structural evolution of the outer Apennine–Adriatic system, Italy Available to Purchase
Polyphase kinematic history of transpression along the Mecca Hills segment of the San Andreas fault, southern California Open Access
Transpressional salt tectonic system in western Qaidam Basin, Western China Available to Purchase
Overview of geologic evolution and hydrocarbon generation of the Pannonian Basin Available to Purchase
Evolution of small-scale flow barriers in German Rotliegend siliciclastics Available to Purchase
Abstract: Many siliciclastic reservoirs contain millimetre-scale diagenetic and structural phenomena affecting fluid flow. We identified three major types of small-scale flow barriers in a clastic Rotliegend hydrocarbon reservoir: cataclastic deformation bands; dissolution seams; and bedding-parallel cementation. Deformation bands of various orientations were analysed on resistivity image logs and in core material. They are mainly conjugates, and can be used to validate seismically observable faults and infer subseismic faults. Bedding-parallel dissolution seams are related to compaction and post-date at least one set of deformation bands. Bedding-parallel cementation is accumulated in coarser-grained layers and depends on the amount of clay coatings. Apparent permeability data related to petrographical image interpretation visualizes the impact of flow barriers on reservoir heterogeneity. Transmissibility multiplier calculations indicate the small efficiency of the studied deformation bands on flow properties in the reservoir. Deformation bands reduce the host-rock permeability by a maximum of two orders of magnitude. However, host-rock anisotropies are inferred to reduce the permeability by a maximum of four orders of magnitude. The relative timing of these flow barriers, as well as the assessment of reservoir heterogeneities, are the basis for state-of-the-art reservoir prediction modelling.
Basement controls on deformation during oblique convergence: Transpressive structures in the western Qaidam Basin, northern Tibetan Plateau Open Access
Transpressional structures and hydrocarbon potential along the Romanche Fracture Zone: a review Available to Purchase
Abstract The Romanche Fracture Zone was originally a corridor of Aptian-age dextral transtensional rifting along the Equatorial Atlantic margins. Late Albian plate tectonic compression occurred due to a change in plate vectors, when the African and South American continents were still in contact across a 500 km-long section of the Romanche Fracture Zone. This dextral compression produced reactivation of the rift faults to produce asymmetric landward-vergent anticlines and thrusts that trend ENE to NE. Fold-axial planes dip seaward, parallel to the rift faults. Minor asymmetric anticlines were developed on the long seaward-dipping fold limbs and these have subvertical axial planes. The asymmetry of the minor folds is due to the southward stratal dip having been oblique to the horizontal maximum principal stress during the Albian inversion. The folds on the African margin were subsequently tightened by compression in Santonian and Oligo-Miocene times. Aptian-age ENE strike-slip faults were reactivated during the compression phases to produce broad positive flower structures up to 30 km wide that formed topographical ridges along the original strike-slip faults. The intervening and broader flat-bottomed synclines do not appear to be associated with rift faults. The folding and thrust faulting created seabed relief of 1–2 km at the end of the Albian; evidenced by the amount of subsequent erosion that removed the better-quality reservoirs in the upper Albian sequence from the major fold crests. Consequently, there has been a significant number of failed oil exploration wells drilled along the fold crests. The fold ridges would have diverted turbidite channels in the onlapping Cenomanian–Campanian sequence and these will be preferentially located on the landward side of the anticlinal crests. Late Cretaceous stratigraphic and structural traps located between the major anticlines have not yet been explored for hydrocarbons along the Romanche Fracture Zone margins.
Seismic Characterization of the Semutang Gas Field, Bengal Basin, Bangladesh Available to Purchase
Field Study of the Positive Flower Structures of the Gombe Inlier, Upper Benue Trough, Northeastern Nigeria Available to Purchase
New structural constraints on the southern Provence thrust belt (France): evidences for an Eocene shortening event linked to the Corsica-Sardinia subduction Available to Purchase
High-resolution spatial rupture pattern of a multiphase flower structure, Rex Hills, Nevada: New insights on scarp evolution in complex topography based on 3-D laser scanning Available to Purchase
Lewis and Clark Line, Montana: Tectonic evolution of a crustal-scale flower structure in the Rocky Mountains Available to Purchase
Abstract The Lewis and Clark line (LCL) is a major transverse structure that crosses the North American Cordillera from northeastern Washington to central Montana. It initiated as a rift structure within the Mesoproterozoic Belt basin and reactivated several times during the Phanerozoic. This field trip examines the internal structure of the LCL along a transect in central-western Montana. Structural plunge permits examination of a 25-km-thick crustal section of a flower structure that formed along the LCL during Late Cretaceous-late Paleocene sinistral transpression. We will observe changes in structural style from the deepest parts of the Belt Supergroup upward to the syntectonic depositional surface.