Analysis of late Holocene faulting within an active rift using lidar, Taupo Rift, New Zealand

Begg, John; Mouslopoulou, Vasiliki

doi:10.1016/j.jvolgeores.2009.06.001

Cited by 67 publications

(60 citation statements)

References 40 publications

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“…So far, this modern technology has been used for fault mapping at regional-to microscale coverage with up to millimetre resolution (e.g. Arrowsmith and Zielke, 2009;Begg and Mouslopoulou, 2010;Wilkinson et al, 2010Wilkinson et al, , 2015Bubeck et al, 2015). Further, the visualisation of bare-earth topography at a regional scale (Cunningham et al, 2006) and the detection of roughness changes along fault scarps (Wiatr et al, 2015) are scopes of application.…”

Section: Discussionmentioning

confidence: 99%

“…In seismic hazard assessment, this technology assists fault mapping (e.g. Arrowsmith and Zielke, 2009;Begg and Mouslopoulou, 2010) as well as providing a tool to trace palaeoevents based on changes in reflectivity and roughness on fault scarps (Wiatr et al, 2015). A generated coherent laser beam with little divergence by stimulated emission is reflected off surfaces and the proportionate backscattered signal is detected, forming a non-contact and non-penetrative active and stationary recording system.…”

Section: T-lidar Measurementsmentioning

confidence: 99%

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3-D visualisation of palaeoseismic trench stratigraphy and trench logging using terrestrial remote sensing and GPR – a multiparametric interpretation

et al. 2016

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Abstract. Two normal faults on the island of Crete and mainland Greece were studied to test an innovative workflow with the goal of obtaining a more objective palaeoseismic trench log, and a 3-D view of the sedimentary architecture within the trench walls. Sedimentary feature geometries in palaeoseismic trenches are related to palaeoearthquake magnitudes which are used in seismic hazard assessments. If the geometry of these sedimentary features can be more representatively measured, seismic hazard assessments can be improved. In this study more representative measurements of sedimentary features are achieved by combining classical palaeoseismic trenching techniques with multispectral approaches. A conventional trench log was firstly compared to results of ISO (iterative self-organising) cluster analysis of a true colour photomosaic representing the spectrum of visible light. Photomosaic acquisition disadvantages (e.g. illumination) were addressed by complementing the data set with active near-infrared backscatter signal image from tLiDAR measurements. The multispectral analysis shows that distinct layers can be identified and it compares well with the conventional trench log. According to this, a distinction of adjacent stratigraphic units was enabled by their particular multispectral composition signature. Based on the trench log, a 3-D interpretation of attached 2-D ground-penetrating radar (GPR) profiles collected on the vertical trench wall was then possible. This is highly beneficial for measuring representative layer thicknesses, displacements, and geometries at depth within the trench wall. Thus, misinterpretation due to cutting effects is minimised. This manuscript combines multiparametric approaches and shows (i) how a 3-D visualisation of palaeoseismic trench stratigraphy and logging can be accomplished by combining t-LiDAR and GPR techniques, and (ii) how a multispectral digital analysis can offer additional advantages to interpret palaeoseismic and stratigraphic data. The multispectral data sets are stored allowing unbiased input for future (re)investigations.

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Section: Discussionmentioning

confidence: 99%

Section: T-lidar Measurementsmentioning

confidence: 99%

3-D visualisation of palaeoseismic trench stratigraphy and trench logging using terrestrial remote sensing and GPR – a multiparametric interpretation

et al. 2016

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“…A Google Earth image of the Rangitaiki Plains in New Zealand displays a filled coastal embayment that has a prominent series of foredune ridges behind the present-day shoreline ( Figure 2). LiDAR collected by (Begg and Mouslopoulou, 2010) show that the infilling did not occur by uniform shoreline progradation, like at Moruya, but a rather complex evolution producing a unique set of prograded barrier islands. The 5…”

Section: Lidar 15mentioning

confidence: 95%

Technical note: Optimizing the utility of combined GPR, OSL, and LiDAR (GOaL) to extract paleoenvironmental records and decipher shoreline evolution

Dougherty¹,

Choi²,

Turney³

et al. 2018

Preprint

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Abstract. Records of past sea levels, storms, and their impacts on coastline are crucial in forecasting future changes resulting from anthropogenic global warming. Coastal barriers that have prograded over the Holocene preserve within their accreting sands history of storm erosion and changes in sea level. High-resolution geophysics, geochronology, and remote sensing techniques offer an optimal way to extract these records and decipher shoreline evolution: Light Detection and Ranging (LiDAR) images the lateral extent of relict shoreline dune morphology; Ground Penetrating Radar (GPR) data 15 records paleo-dune, beach and nearshore stratigraphy; Optically Stimulated Luminescence (OSL) dates when sand grains were deposited that form these shorelines. Utilization of these technological advances has recently become more prevalent in coastal research. The resolution and sensitivity of these methods offer unique insights on coastal environments and their relationship to past climate change. However, discrepancies in analysis and presentation of the data can result in erroneous interpretations. When utilized correctly on prograded barriers these methods (independently or in various combinations) 20 have produced storm records, constructed sea-level curves, quantified sediment budgets, and deciphered coastal evolution.Therefore, combining the application of GPR, OSL, and LiDAR (GOaL) on one prograded barrier has the potential to generate detailed records of storms, sea level, and sediment supply for that coastline. Obtaining this GOaL hat-trick can provide valuable insights into how these three factors influenced past and future barrier evolution. Here we argue that systematically achieving GOaL hat-tricks on some of the 300+ prograded barriers worldwide would allow us to disentangle 25 local patterns of sediment supply from regional effects of storms or global changes in sea level, allowing direct comparison to climate proxy records. To fully realize this aim requires standardization of methods to optimize results. The impetus for this initiative is to establish a framework for consistent data analysis that maximizes the potential of GOaL to contribute to climate change research and assist coastal communities in mitigating future impacts of global warming.Clim. Past Discuss., https://doi

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“…ALS offers regional scale coverage with up to a couple of meters resolution that is ideal for fault mapping (e.g. Hudnut et al, 2002;Cunningham et al, 2006;Arrowsmith and Zielke, 2009;Engelkemeir and Khan, 2008;Begg and Mouslopoulou, 2010;Hilley et al, 2010;Haddad et al, 2012;Oskin et al, 2012). On the other hand, the TLS is ground based, offers a lower coverage due to the limited range of the instruments and the reduced visibility from working at the surface, but provides a higher resolution, usually of a few cm, that depending on the distance to the target can be reduced up to a few mm (Jones et al, 2009;Wilkinson et al, 2010;Gold et al, 2012;Haddad et al, 2012;Gold et al, 2013;Wilkinson et al, in press this issue; Bubeck et al, in press this issue).…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Geomorphology of active faulting and seismic hazard assessment: New tools and future challenges

et al. 2015

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Analysis of late Holocene faulting within an active rift using lidar, Taupo Rift, New Zealand

Cited by 67 publications

References 40 publications

3-D visualisation of palaeoseismic trench stratigraphy and trench logging using terrestrial remote sensing and GPR – a multiparametric interpretation

3-D visualisation of palaeoseismic trench stratigraphy and trench logging using terrestrial remote sensing and GPR – a multiparametric interpretation

Technical note: Optimizing the utility of combined GPR, OSL, and LiDAR (GOaL) to extract paleoenvironmental records and decipher shoreline evolution

Geomorphology of active faulting and seismic hazard assessment: New tools and future challenges

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