Present‐day stress orientations and tectonic provinces of the NW Borneo collisional margin

King, Robert G.; Tingay, Mark; Hillis, Richard R.; Morley, C.K.; Clark, Junebug

doi:10.1029/2009jb006997

Cited by 32 publications

(22 citation statements)

References 66 publications

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“…4). Similar stress rotations have been also observed along active thrust fronts, for instance, offshore NW Borneo collisional margin (King et al 2010) and along the fold and thrust mountain range in New Guinea (Hillis & Reynolds 2000).…”

Section: Discussionsupporting

confidence: 74%

The Italian present-day stress map

Montone

Mariucci

Pierdominici

2012

Geophysical Journal International

124

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S U M M A R YIn this paper, we present a significant update of the Italian present-day stress data compilation not only to improve the knowledge on the tectonic setting of the region or to constrain future geodynamic models, but also to understand the mechanics of processes linked to faulting and earthquakes. In this paper, we have analysed, revised and collected new contemporary stress data from borehole breakouts and we have assembled earthquake and fault data. In total, 206 new quality-ranked entries complete the definition of the horizontal stress orientation and tectonic regime in some areas, and bring new information mainly in Sicily and along the Apenninic belt. Now the global Italian data set consists of 715 data points, including 499 of A-C quality, representing an increase of 37 per cent compared to the previous compilation. The alignment of horizontal stresses measured in some regions, closely matches the ∼N-S firstorder stress field orientation of ongoing relative crustal motions between Eurasia and Africa plates. The Apenninic belt shows a diffuse extensional stress regime indicating a ∼NE-SW direction of extension, that we interpret as related to a second-order stress field. The horizontal stress rotations observed in peculiar areas reflect a complex interaction between first-order stress field and local effects revealing the importance of the tectonic structure orientations. In particular, in Sicily the new data delineate a more complete tectonic picture evidencing adjacent areas characterized by distinct stress regime: northern offshore of Sicily and in the Hyblean plateau the alignment of horizontal stresses is consistent with the crustal motions, whereas different directions have been observed along the belt and foredeep.

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Section: Discussionsupporting

confidence: 74%

The Italian present-day stress map

Montone

Mariucci

Pierdominici

2012

Geophysical Journal International

124

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“…The extension in the upper part of the delta leads to the formation of basinward-dipping listric growth faults and half-graben structures. At the toe, compressional featu-res like thrusts and folds occur (King et al 2010). The normal faults and the thrusts are commonly rooted in a basal detachment that links both structural regimes (Brandes et al 2007b).…”

Section: Deformation Structuresmentioning

confidence: 99%

Ice‐marginal forced regressive deltas in glacial lake basins: geomorphology, facies variability and large‐scale depositional architecture

Winsemann

Lang

Polom

et al. 2018

Boreas

130

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Brandes, C. 2018 (October): Ice-marginal forced regressive deltas in glacial lake basins: geomorphology, facies variability and large-scale depositional architecture.This study presents a synthesis of the geomorphology, facies variability and depositional architecture of ice-marginal deltas affected by rapid lake-level change. The integration of digital elevation models, outcrop, borehole, groundpenetrating radar and high-resolution shear-wave seismic data allows for a comprehensive analysis of these delta systems and provides information about the distinct types of deltaic facies and geometries generated under different lake-level trends. The exposed delta sediments record mainly the phase of maximum lake level and subsequent lake drainage. The stair-stepped profiles of the delta systems reflect the progressive basinward lobe deposition during forced regression when the lakes successively drained. Depending on the rate and magnitude of lake-level fall, fanshaped, lobate or more digitate tongue-like delta morphologies developed. Deposits of the stair-stepped transgressive delta bodies are buried, downlapped and onlapped by the younger forced regressive deposits. The delta styles comprise both Gilbert-type deltas and shoal-water deltas. The sedimentary facies of the steep Gilberttype delta foresets include a wide range of gravity-flow deposits. Delta deposits of the forced-regressive phase are commonly dominated by coarse-grained debrisflow deposits, indicating strong upslope erosion and cannibalization of older delta deposits. Deposits of supercritical turbidity currents are particularly common in sand-rich Gilbert-type deltas that formed during slow rises in lake level and during highstands. Foreset beds consist typically of laterally and vertically stacked deposits of antidunes and cyclic steps. The trigger mechanisms for these supercritical turbidity currents were both hyperpycnal meltwater flows and slope-failure events. Shoal-water deltas formed at low water depths during both low rates of lake-level rise and forced regression. Deposition occurred from tractional flows. Transgressive mouthbars form laterally extensive sand-rich delta bodies with a digitate, multi-tongue morphology. In contrast, forced regressive gravelly shoal-water deltas show a high dispersion of flow directions and form laterally overlapping delta lobes. Deformation structures in the forced-regressive ice-marginal deltas are mainly extensional features, including normal faults, small graben or half-graben structures and shear-deformation bands, which are related to gravitational delta tectonics, postglacial faulting during glacial-isostatic adjustment, and crestal collapse above salt domes. A neotectonic component cannot be ruled out in some cases. facies and the larger-scale depositional architecture. The results are compared with other marine and lacustrine delta examples from the literature, and provide information about the distinct types

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“…Furthermore, pre‐existing anisotropies may induce a local reorientation of the extension direction (e.g. Bell, ; Morley, ; Zhang, Dusseault, & Yassir, ), as indicated by the inversion of earthquake focal mechanisms (Morley, ), analysis of borehole break‐out data (King, Tingay, Hillis, Morley, & Clark, ; Tingay, Morley, Hillis, & Meyer, ), and numerical model results (Homberg, Hu, Angelier, Bergerat, & Lacombe, ; Maerten et al, ; Maerten, Willemse, Pollard, & Rawnsley, ).…”

Section: Introductionmentioning

confidence: 99%

Normal fault growth influenced by basement fabrics: The importance of preferential nucleation from pre‐existing structures

et al. 2019

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Reactivation of pre-existing intra-basement structures can influence the evolution of rift basins, yet the detailed kinematic relationship between these structures and overlying rift-related faults remains poorly understood. Understanding the kinematic as well as geometric relationship between intra-basement structures and rift-related fault networks is important, with the extension direction in many rifted provinces typically thought to lie normal to fault strike. We here investigate this problem using a borehole-constrained, 3D seismic reflection dataset from the Taranaki Basin, offshore New Zealand. Excellent imaging of intra-basement structures and a relatively weakly deformed, stratigraphically simple sedimentary cover allow us to: (a) identify a range of interaction styles between intra-basement structures and overlying, Plio-Pleistocene rift-related normal faults; and (b) examine the cover fault kinematics associated with each interaction style. Some of the normal faults parallel and are physically connected to intra-basement reflections, which are interpreted as mylonitic reverse faults formed during Mesozoic subduction and basement terrane accretion. These geometric relationships indicate pre-existing intra-basement structures locally controlled the position and attitude of Plio-Pleistocene rift-related normal faults. However, through detailed 3D kinematic analysis of selected normal faults, we show that: (a) normal faults only nucleated above intra-basement structures that experienced late Miocene compressional reactivation, (b) despite playing an important role during subsequent rifting, intra-basement structures have not been significantly extensionally reactivated, and (c) preferential nucleation and propagation of normal faults within late Miocene reverse faults and folds appears to be the key genetic relationship between contractionally reactivated intra-basement structures and rift-related normal faults. Our analysis shows that km-scale, intra-basement structures can control the nucleation and development of newly formed, rift-related nor-mal faults, most likely due to a local perturbation of the regional stress field. Because of this, simply inverting fault strike for causal extension direction may be incorrect, especially in provinces where pre-existing, intra-basement structures occur. We also 660 | EAGE COLLANEGA Et AL.

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Present‐day stress orientations and tectonic provinces of the NW Borneo collisional margin

Cited by 32 publications

References 66 publications

The Italian present-day stress map

The Italian present-day stress map

Ice‐marginal forced regressive deltas in glacial lake basins: geomorphology, facies variability and large‐scale depositional architecture

Normal fault growth influenced by basement fabrics: The importance of preferential nucleation from pre‐existing structures

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