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Camerlenghi, Angelo
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Camerlenghi, Angelo
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- PublicationOpen AccessThe Deep Sea and Sub-Seafloor Frontier(European Commission, 2012)
; ; ; ; ; ; ; ; ; ; ; ; ;Kopf, A.; MARUM, Univ. Bremen Leobener Strasse 28359 Bremen, Germany ;Camerlenghi, A.; Istituto Nazionale di Oceanografia e di Geofisica Sperimentale (OGS), Trieste ;Canals, M.; Departament d’Estratigrafia, Paleontologia i Geociències Marines de la Facultat de Geologia de la Universitat de Barcelona ;Ferdelman, T.; Department of Biogeochemistry at the Max-Plank-Institute for Marine Microbiology, University of Bremen ;Mevel, C.; Institut de Physique du Globe de Paris ;Pälike, H.; The National Oceanography Centre, University of Southampton ;Roest, W.; Unitè Gèosciences Marines Laboratoire Gèophysique et Gèodynamique Centre Bretagne - ZI de la Pointe du Diable - CS 10070 - 29280 Plouzané ;Ask, M.; Rock Mechanics and Mining Engineering, 2006, Luleå University of Technology, Sweden ;Barker-Jørgensen, B.; MPI for Marine Microbiology Celsiusstr. 1 D-28359 Bremen Germany ;Boetius, A.; HGF-MPG Group for Deep Sea Ecology and Technology, Max Planck Institute for Marine Microbiology Celsiusstr. 1, 28359 Bremen, Germany ;De Santis, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;Früh-Green, G.; Inst. f. Geochemie und Petrologie, NW E 76.2, Clausiusstrasse 25, 8092 Zuerich; ; ; ; ; ; ; ; ; ; ; The deep sea and its sub-seafloor contain a vast reservoir of physical, mineral and biological resources that are rapidly coming into the window of exploitation. Assessing the opportunities and the risks involved requires a serious commitment to excellent deep sea research. There are numerous areas in this field in which Europe has cutting-edge technological potential. These include drilling and monitoring technology in the field of renewable energies such as geothermal, offshore wind and seafloor resources. Scientific ocean drilling will continue to play a valuable role, for example in the exploration of resource opportunities, in obtaining estimates for ecosystem and Earth climate sensitivity, or in improving understanding about the controlling factors governing processes and recurrence intervals of submarine geohazards. In Europe, there is also the scientific expertise needed to define a framework for policymakers for environmental protection measures and to carry out ecological impact assessments before, during and after commercial exploitation. Taking up these societal challenges will strengthen European scientific and educational networks and promote the development of world-class technology and industrial leadership.602 668 - PublicationRestrictedA refined age calibrated paleosecular variation and relative paleointensity stack for the NW Barents Sea: Implication for geomagnetic field behavior during the Holocene(2020)
; ; ; ; ; ; ; ; ; ; ; ; ; Reconstruction of Paleomagnetic Secular Variation (PSV) of the geomagnetic field is fundamental both to assess geodynamo models and to obtain age constraints for rocks, sediments and archaeological material. We present refined age-calibrated Holocene PSV and relative paleointensity (RPI) stack curves derived from Arctic marine sediments (Northwestern Barents Sea). The Holocene sections of four sedimentary cores were correlated on the basis of paleomagnetic trends and age models, and stacked. The resultant composite PSV and RPI Holocene records (NBS stack) and the reconstructed Holocene Virtual Geomag- netic Pole (VGP) path were evaluated in comparison with the most recent paleomagnetic stack curves and geomagnetic field models. The data indicate that during the Holocene time, the VGPs moved within the superficial projection of the inner core tangent cylinder, with the exception of short time intervals around 5600 and 3200 cal yr BP when VGPs extended to lower latitudes. These deviations might reflect regional geomagnetic features, such as persistent geomagnetic flux lobes at core-mantle boundary. Our data confirm that the large VGP shift observed around 5600 cal yr BP is the result of an increased radial magnetic field at the core-mantle boundary over North America, whilst the VGP shift around 3200 cal yr BP represents a major swing to middle latitudes toward the Middle East and might be associated to a regional high paleointensity peak, known as Levantine Iron Age Anomaly (LIAA).580 9 - PublicationRestrictedEnvironmental magnetism of Antarctic Late Pleistocene sediments and interhemispheric correlation of climatic events(2001-07)
; ; ; ; ;Sagnotti, L.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;Macrì, P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;Camerlenghi, A.; Istituto Nazionale di Oceanografia e di Geofisica Sperimentale ;Rebesco, M.; Istituto Nazionale di Oceanografia e di Geofisica Sperimentale; ; ; Recent developments in paleomagnetism and environmental magnetism provide new tools for the detailed correlation of climatically induced magnetic mineralogy changes in sedimentary sequences. Studies of these changes contribute to the reconstruction of climate history for the glacial^interglacial cycles of the Late Pleistocene and to the delineation of the range of natural variability for global climate during the past hundred thousands years. Here we show that sharp coercivity minima observed in fine-grained sediments from the continental rise of the western Antarctic Peninsula correlate to the major rapid cooling events of the northern Atlantic (Heinrich layers). We interpret such an environmental magnetic signal in terms of variations in deep sea diagenetic processes of sulfide formation, which reflect changes in the input of detrital organic matter controlled by sea-ice extent. With the inherent uncertainties in age controls, the sedimentary paleoclimatic markers of the two hemispheres are almost contemporaneous, but interhemispheric time lags or leads of the order of 1-2 kyr (such as those recently reported from the Greenland and Antarctic ice cores) are also compatible with the data.326 21 - PublicationRestrictedA Holocene paleosecular variation record from the northwestern Barents Sea continental margin(2011-11-01)
; ; ; ; ; ;Sagnotti, L.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;Macrì, P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;Lucchi, R.; Istituto Nazionale di Oceanografia e Geofisica Sperimentale, Borgo Grotta Gigante 42/c, Sgonico, Trieste I‐34010, Italy ;Rebesco, M.; Istituto Nazionale di Oceanografia e Geofisica Sperimentale, Borgo Grotta Gigante 42/c, Sgonico, Trieste I‐34010, Italy ;Camerlenghi, A.; Istitució Catalana de Recerca i Estudis Avançats, E‐08028 Barcelona, Spain; ; ; ; A high‐resolution paleomagnetic and rock magnetic study has been carried out on sediment cores collected in glaciomarine silty‐clay sequences from the continental shelf and slope of the southern Storfjorden trough‐mouth fan, on the northwestern Barents Sea continental margin. The Storfjorden sedimentary system was investigated during the SVAIS and EGLACOM cruises, when 10 gravity cores, with a variable length from 1.03 m to 6.41 m, were retrieved. Accelerator mass spectrometry (AMS) 14C analyses on 24 samples indicate that the cores span a time interval that includes the Holocene, the last deglaciation phase and in some cores the last glacial maximum. The sediments carry a well‐defined characteristic remanent magnetization and have a valuable potential to reconstruct the paleosecular variation (PSV) of the geomagnetic field, including relative paleointensity (RPI) variations. The paleomagnetic data allow reconstruction of past dynamics and amplitude of the geomagnetic field variations at high northern latitudes (75°–76° N). At the same time, the rock magnetic and paleomagnetic data allow a high‐resolution correlation of the sedimentary sequences and a refinement of their preliminary age models. The Holocene PSV and RPI records appear particularly sound, since they are consistent between cores and they can be correlated to the closest regional stacking curves (UK PSV, FENNOSTACK and FENNORPIS) and global geomagnetic model for the last 7 ka (CALS7k.2). The computed amplitude of secular variation is lower than that outlined by some geomagnetic field models, suggesting that it has been almost independent from latitude during the Holocene.597 103 - PublicationRestrictedPostglacial sedimentary processes on the Storfjorden and Kveithola trough mouth fans: impact of extreme glacimarine sedimentation(2013-12)
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;Lucchi, R. G.; OGS (Istituto Nazionale di Oceanografia e di Geofisica Sperimentale), Borgo Grotta Gigante 42/c, I-34010 Sgonico, Trieste, Italy ;Camerlenghi, A.; OGS (Istituto Nazionale di Oceanografia e di Geofisica Sperimentale), Borgo Grotta Gigante 42/c, I-34010 Sgonico, Trieste, Italy ;Rebesco, M.; OGS (Istituto Nazionale di Oceanografia e di Geofisica Sperimentale), Borgo Grotta Gigante 42/c, I-34010 Sgonico, Trieste, Italy ;Colmenero-Hidalgo, E.; Department of Geology, Faculty of Sciences, University of Salamanca, E-37008 Salamanca, Spain ;Sierro, F. J.; Department of Geology, Faculty of Sciences, University of Salamanca, E-37008 Salamanca, Spain ;Sagnotti, L.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;Urgeles, R.; Institut de Ciències del Mar (CSIC), Passeig Marítim de la Barceloneta, 37-49, E-08003 Barcelona, Spain ;Melis, R.; Dipartimento di Geoscienze, Università di Trieste, Via E. Weiss 2, I-34128 Trieste, Italy ;Morigi, C.; Department of Stratigraphy, Geological Survey of Denmark and Greenland (GEUS), Øster Voldgade 10, DK-1350 Copenhagen K, Denmark ;Bárcena, M.-A.; Department of Geology, Faculty of Sciences, University of Salamanca, E-37008 Salamanca, Spain ;Giorgetti, G.; Dipartimento di Scienze della Terra, Università di Siena, via Laterina 8, I-53100 Siena, Italy ;Villa, G.; Dipartimento di Fisica e Scienze della Terra “Macedonio Melloni”, Parco Area delle Scienze, 157A, 43124 Parma, Italy ;Persico, D.; Dipartimento di Fisica e Scienze della Terra “Macedonio Melloni”, Parco Area delle Scienze, 157A, 43124 Parma, Italy ;Flores, J.-A.; Department of Geology, Faculty of Sciences, University of Salamanca, E-37008 Salamanca, Spain ;Rigual-Hernández, A. S.; Department of Geology, Fa ;Pedrosa, M. T.; Departament d'Estratigrafia, Paleontologia i Geociències Marines, Universitat de Barcelona, Facultat de Geologia, C/Martí i Franquès, s/n, E-08028 Barcelona, Spain ;Macrì, P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;Caburlotto, A.; OGS (Istituto Nazionale di Oceanografia e di Geofisica Sperimentale), Borgo Grotta Gigante 42/c, I-34010 Sgonico, Trieste, Italy; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; The depositional history of the Storfjorden and Kveithola trough-mouth fans (TMFs) in the northwestern Barents Sea has been investigated within two coordinated Spanish and Italian projects in the framework of the International Polar Year (IPY) Activity 367, NICE STREAMS. The investigation has been conducted using a multidisciplinary approach to the study of sediment cores positioned on high-resolution multibeam bathymetry and TOPAS/CHIRP sub-bottom profiles. Core correlation and the age model were based on 27 AMS 14C samples, rock magnetic parameters, lithofacies sequences, and the presence of marker beds including two oxidized layers marking the post Last Glacial Maximum (LGM) inception of deglaciation (OX-2) and the Younger Dryas cold climatic event (OX-1). Sediment facies analysis allowed the distinction of a number of depositional processes whose onset appears closely related to ice stream dynamics and oceanographic patterns in response to climate change. The glacigenic diamicton with low water content, high density, and high shear strength, deposited during glacial maxima, indicates ice streams grounded at the shelf edge. Massive release of IRD occurred at the inception of deglaciation in response to increased calving rates with possible outer ice streams lift off and collapse. The presence of a several-meter-thick sequence of interlaminated sediments deposited by subglacial outbursts of turbid meltwater (plumites) indicates rapid ice streams' melting and retreat. Crudely-layered and heavily-bioturbated sediments were deposited by contour currents under climatic/environmental conditions favorable to bioproductivity. The extreme sedimentation rate of 3.4 cm a− 1 calculated for the plumites from the upper-slope area indicates a massive, nearly instantaneous (less than 150 years), terrigenous input corresponding to an outstanding meltwater event. We propose these interlaminated sediments to represent the high-latitude marine record of MeltWater Pulse 1a (MWP-1a). Different bathymetric and oceanographic conditions controlled locally the mode of glacial retreat, resulting in different thickness of plumites on the upper continental slope of the Storfjorden and Kveithola TMFs. It is possible that the southern part of Storfjorden TMF received additional sediments from the deglaciation of the neighboring Kveithola ice stream.617 55 - PublicationOpen AccessMarine sedimentary record of Meltwater Pulse 1a in the NW Barents Sea continental margin(2015-11-20)
; ; ; ; ; ; ; ;Lucchi, R. G.; INOGS ;Sagnotti, L.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;Camerlenghi, A.; INOGS ;Macrì, P.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;Rebesco, M.; INOGS ;Pedrosa, M. T; CSIC -‐ Universidad de Granada ;Giorgetti, G.; Università di Siena; ; ; ; ; ; The upper continental slope of the Storfjorden- Kveithola Trough Mouth Fans (NW Barents Sea) contains a several m-thick late Pleistocene sequence of plumites composed of laminated mud interbedded with sand/silt layers. Radiocarbon ages revealed that deposition occurred during about 130 years at a very high sedimentation rate of 3.4 cm a-1, at about 7 km from the present shelf break. Palaeomagnetic and rock magnetic analyses confirm the existence of a prominent, short-living sedimentary event. The plumites appear laterally continuous and were correlated with the sedimentary sequences described west of Svalbard and neighboring glacial depositional systems representing a major event at regional scale appointed to correspond to the deep-sea sedimentary record of Meltwater Pulse-1a. We also present new sedimentological and geochemical insights, and multi-beam data adding information on the palaeoenvironmental characteristics during MWP-1a and ice sheet decay in the NW Barents Sea.325 396