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dc.contributor.authorRotevatn, Atle
dc.contributor.authorThorsheim, Elin
dc.contributor.authorBastesen, Eivind
dc.contributor.authorFossmark, Heidi Synnøve Solli
dc.contributor.authorTorabi, Anita
dc.contributor.authorSælen, Gunnar
dc.PublishedJournal of Structural Geology 2016, 90:27-47eng
dc.description.abstractDeformation bands in porous sandstones have been extensively studied for four decades, whereas comparatively less is known about deformation bands in porous carbonate rocks, particularly in extensional settings. Here, we investigate porous grainstones of the Globigerina Limestone Formation in Malta, which contain several types of deformation bands in the hangingwall of the Maghlaq Fault: (i) bed-parallel pure compaction bands (PCB); (ii) pressure solution-dominated compactive shear bands (SCSB) and iii) cataclasis-dominated compactive shear bands (CCSB). Geometric and kinematic analyses show that the bands formed sequentially in the hangingwall of the evolving Maghlaq growth fault. PCBs formed first due to fault-controlled subsidence and vertical loading; a (semi-)tectonic control on PCB formation is thus documented for the first time in an extensional setting. Pressure solution (dominating SCSBs) and cataclasis (dominating CCSBs) appear to have operated separately, and not in concert. Our findings therefore suggest that, in some carbonate rocks, cataclasis within deformation bands may develop irrespective of whether pressure solution processes are involved. We suggest this may be related to stress state, and that whereas pressure solution is a significant facilitator of grain size reduction in contractional settings, grain size reduction within deformation bands in extensional settings is less dependent on pressure solution processes.en_US
dc.rightsAttribution CC BY-NC-NDeng
dc.subjectDeformation bandseng
dc.subjectDamage zoneeng
dc.subjectCarbonate grainstoneeng
dc.subjectCompaction bandeng
dc.subjectShear bandeng
dc.titleSequential growth of deformation bands in carbonate grainstones in the hangingwall of an active growth fault: Implications for deformation mechanisms in different tectonic regimesen_US
dc.typePeer reviewed
dc.typeJournal article
dc.rights.holderCopyright 2016 the authorsen_US

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