Luciana Bonatto

University of La Serena

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Claudia Piromallo

Istituto Nazionale di Geofisica e Vulcanologia

Martín Schimmel

Geociencias Barcelona

J. Gallart

Geociencias Barcelona

Stephen Monna

Istituto Nazionale di Geofisica e Vulcanologia

Aladino Govoni

Istituto Nazionale di Geofisica e Vulcanologia

Simone Salimbeni

Istituto Nazionale di Geofisica e Vulcanologia

Caterina Montuori

Istituto Nazionale di Geofisica e Vulcanologia

Anne Paul

Institut des Sciences de la Terre

Katrin Hannemann

University of Münster

Massimo Di Bona

Istituto Nazionale di Geofisica e Vulcanologia

Cooperative Institutions

Istituto Nazionale di Geofisica e Vulcanologia

University of Vienna

Geociencias Barcelona

Centre National de la Recherche Scientifique

Helmholtz Centre Potsdam - GFZ German Research Centre for Geosciences

Radiotelevisione Italiana (Italy)

University of Lisbon

Institute of Geophysics

Polish Academy of Sciences

Institut de physique du globe de Paris

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Receiver Function Open-Access Dataset for the European Alps

Zenodo (CERN European Organization for Nuclear Research) (2022)

Konstantinos Michailos György Hetényi Matteo Scarponi Josip Stipčević Irene Bianchi

This dataset comprises of the receiver function traces calculated using seismic waveform data from the AlpArray Seismic Network, three other temporary seismic networks, and permanent stations in the broader European Alpine region. We use this dataset to compile a new Moho depth map for the broader European Alps. In particular, we include: the radial receiver function traces in .SAC format (RRF.zip). One SAC trace per station and teleseismic earthquake. the transverse (TRF.zip) traces in .SAC format. the receiver function stacks from all the seismic stations plotted versus back-azimuth in .png format (RRF_plots.zip and TRF_plots.zip) For details on how to read and process the receiver function traces have a look at the README file of the repository.

10.5281/zenodo.7311493

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The transition zone below the Chile-Argentina flat subduction region

EGUGA (2017)

Luciana Bonatto Claudia Piromallo Gabriela Badi

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The upper mantle transition zone beneath the Ibero-Maghrebian region as seen by teleseismic Pds phases

Luciana Bonatto Martín Schimmel J. Gallart J. Morales

Abstract We investigate the upper-mantle transition zone thickness beneath the Ibero-Maghrebian region using teleseismic events recorded at 258 seismic stations from the IberArray of the Spanish TopoIberia project. For this purpose, the 410 km and 660 km depth discontinuities are mapped through the detection of P-to-s conversions. In order to add consistency and robustness to the detections, the final results are based on a joint analysis of receiver functions and two different cross-correlation functionals. Discontinuity depths are determined using time corrections obtained from a 3-D velocity model. This study presents the first high-resolution topography maps for the 410 and 660 discontinuities, which show lateral variations in the transition zone thickness beneath the study area. The results are discussed to add new constraints on temperature and composition to seismic velocity anomalies observed in the transition zone beneath the controversial Ibero-Maghrebian region. We obtained a thickened transition zone beneath the Alboran Sea and the north Balearic Sea suggesting low transition zone temperatures, and coinciding with the position of the high-velocity anomalies in the tomographic images related to the Betic-Alboran slab and the Alpine-Tethys remnant slab, respectively. A dominantly thinned transition zone beneath the Gulf of Cadiz and its surroundings suggest high-mantle temperatures. We also found evidences of the presence of a low-velocity layer atop the 410 discontinuity beneath the study area.

Classification of discontinuities

Discontinuity (linguistics)

Slab

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Moho depths beneath the European Alps: a homogeneously processed map and receiver functions database

Earth system science data (2023)

Konstantinos Michailos György Hetényi Matteo Scarponi Josip Stipčević Irene Bianchi

Abstract. We use seismic waveform data from the AlpArray Seismic Network and three other temporary seismic networks, to perform receiver function (RF) calculations and time-to-depth migration to update the knowledge of the Moho discontinuity beneath the broader European Alps. In particular, we set up a homogeneous processing scheme to compute RFs using the time-domain iterative deconvolution method and apply consistent quality control to yield 112 205 high-quality RFs. We then perform time-to-depth migration in a newly implemented 3D spherical coordinate system using a European-scale reference P and S wave velocity model. This approach, together with the dense data coverage, provide us with a 3D migrated volume, from which we present migrated profiles that reflect the first-order crustal thickness structure. We create a detailed Moho map by manually picking the discontinuity in a set of orthogonal profiles covering the entire area. We make the RF dataset, the software for the entire processing workflow, as well as the Moho map, openly available; these open-access datasets and results will allow other researchers to build on the current study.

Discontinuity (linguistics)

Data set

Data Processing

10.5194/essd-15-2117-2023

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Citations (7)

Searching for upper mantle discontinuities beneath South Spain

Luciana Bonatto Martín Schimmel J. Gallart

Classification of discontinuities

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The contribution of the seismic component of Topo-Iberia to the imaging of the deep structure of the Iberian Peninsula and North Morocco

EGUGA (2015)

Justino Díaz J. Gallart Flor de Lis Mancilla Antonio Villaseñor Luciana Bonatto

Peninsula

Component (thermodynamics)

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European Alps Receiver Function Database

Zenodo (CERN European Organization for Nuclear Research) (2023)

Konstantinos Michailos György Hetényi Matteo Scarponi Josip Stipčević Irene Bianchi

This dataset contains the receiver function traces calculated using seismic waveform data from the AlpArray Seismic Network, three other temporary seismic networks, and permanent stations in the broader European Alpine region. We use this dataset to compile a new Moho depth map for the broader European Alps. In particular, we include: all the downloaded seismic waveform data (ZNE components; 120s before and after the theoretical P-wave arrival) prior to RF calculation apart from those from the PACASE seismic network that are under embargo. the radial receiver function traces in .SAC format (RRF.zip). One SAC trace per station and teleseismic earthquake. the transverse (TRF.zip) traces in .SAC format. the receiver function stacks from all the seismic stations plotted versus back-azimuth in .png format (RRF_plots.zip and TRF_plots.zip) moho_depth_picks.csv that contains the moho depth picks information shown in the main article Figure 8a. a CSV file with details of the teleseismic earthquakes. a list of all the seismic stations used here. For details on how to read and process the receiver function traces have a look at the README file of the repository. For more details on this dataset, have a look at our manuscript entitled “Moho depths beneath the European Alps: a homogeneously processed map and receiver functions database” in Earth System Science Data (ESSD) journal and our GitHub repository.

10.5281/zenodo.7695125

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Estructura y dinámica del manto bajo la Península Ibérica: La contribución del proyecto Topo-Iberia

Geotemas ( Madrid ) (2016)

Jaqueline Rosas Díaz Antonio Villaseñor Flor de Lis Mancilla I. Palomeras Luciana Bonatto

espanolLa plataforma instrumental IberArray, parte integrante del proyecto Topo-Iberia, ha proporcionado un aumento radical en la cantidad de datos geofisicos disponibles para definir la estructura y dinamica del manto bajo la Peninsula Iberica. La funciones receptoras han permitido obtener un mapa detallado de las variaciones de grosor cortical. Las diversas tomografias de ondas compresionales y de superficie han permitido definir la geometria de la zona de alta velocidad bajo Alboran. Las discontinuidades a 410 y 660 km han sido investigadas utilizando metodos novedosos de correlacion cruzada y sumacion. Finalmente, la medida e interpretacion de los parametros anisotropicos ha hecho posible describir el flujo a nivel astenosferico. EnglishThe IberArray instrumental platform, part of the TopoIberia project, has provided a huge increase on the geophysical datasets available to constrain the structure and dynamics of the mantle beneath the Iberian Peninsula. Receiver Functions have allowed to map accurately large crustal thickness variations. Volume and surface wave tomographies have been obtained for the crust and the upper mantle, allowing to define the geometry of the highvelocity slab beneath Alboran. The 410-km and 660-km discontinuities have been investigated using novel crosscorrelation/stacking techniques. Finally, the measurement and interpretation of the anisotropic parameters has provided a new insight on the asthenospheric flow.

Peninsula

Receiver function

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Preliminary results on the lithosphere and upper mantle below the greater Alpine region from P and S Receiver Function calculated on AlpArray data

EGUGA (2019)

Caterina Montuori Stephen Monna Claudia Piromallo F. Frugoni Luciana Bonatto

Receiver function

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Unveiling the distinct structure of the upper mantle beneath the Canary and Madeira hotspots, as depicted by the 660, 410 and X discontinuities

Authorea (Authorea) (2023)

Luciana Bonatto David Schlaphorst Graça Silveira João Mata chiara cciviero

The Canary and Madeira Islands are two distinct hotspots in the Central-East Atlantic that are close to each other. Their volcanism is generally attributed to underlying mantle plumes, but the detailed structure of these plumes is still not well understood. The thermal and compositional structure of the plume introduces complexities in the phase transitions of the mantle, which impact the depth and magnitude of seismic discontinuities. We use 1268 high-quality receiver functions from stations located at the two hotspots to detect P-to-s converted phases through a common-conversion point stacking approach and conduct a detailed analysis of mantle seismic discontinuities. The results show that both hotspots are characterized by a thin mantle transition zone (MTZ), with sharp 410 and 660 discontinuities at depths of 429-420 km and 647-664 km, beneath the Canaries and Madeira respectively. The results indicate that the Canary plume crosses the MTZ, whereas the Madeira plume mainly influences the upper portion of the MTZ. Furthermore, we find reliable detections of a sharp X discontinuity beneath the Canaries at 289 km. Its presence suggests the accumulation of silica-rich recycled eclogite at these depths. We also use the amplitudes of P410s and PXs to derive velocity jumps at corresponding discontinuities. Based on these measurements, we estimate that the basalt proportion is 60-80\%, with accumulation being more significant in the Canaries than in Madeira. The MTZ thickness, the presence of the X discontinuity, and the high basalt proportion provide compelling evidence for a deep-rooted thermochemical plume beneath the study area.

Classification of discontinuities

Mantle plume

Discontinuity (linguistics)

Hotspot (geology)

10.22541/essoar.169945538.83938467/v1

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