Francesca Meneghini

University of Pisa

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Trends

Author Order

Document Type

Co-Authors

Michèle Marroni

Institute of Geosciences and Earth Resources

Luca Pandolfi

University of Pisa

ÅF

Åke Fagereng

Cardiff University

C. D. Rowe

McGill University

J. Casey Moore

University of California, Santa Cruz

Laura Wallace

The University of Texas at Austin

D. M. Saffer

The University of Texas at Austin

H. M. Savage

University of California, Santa Cruz

Philip M. Barnes

National Institute of Water and Atmospheric Research

Katerina Petronotis

Discovery Place

Cooperative Institutions

International Ocean Discovery Program

Expedition (United Kingdom)

University of Pisa

Japan Agency for Marine-Earth Science and Technology

The University of Tokyo

GNS Science

University of Perugia

Institute of Geosciences and Earth Resources

University of California, Santa Cruz

National Institute of Advanced Industrial Science and Technology

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

The role of the Ottone-Levanto Line in the geodynamic evolution of the Northern Apennine: evidences from the high Sturla Valley, Liguria, Italy

Noah Hobbs E. Luvisi Michèle Marroni Francesca Meneghini Luca Pandolfi

Line (geometry)

Source

Cite

Citations (0)

A geological fingerprint of low‐viscosity fault fluids mobilized during an earthquake

Journal of Geophysical Research Atmospheres (2009)

E. E. Brodsky C. D. Rowe Francesca Meneghini J. Casey Moore

The absolute value of stress on a fault during slip is a critical unknown quantity in earthquake physics. One of the reasons for the uncertainty is a lack of geological constraints in real faults. Here we calculate the slip rate and stress on an ancient fault in a new way based on rocks preserved in an unusual exposure. The study area consists of a fault core on Kodiak Island that has a series of asymmetrical intrusions of ultrafine‐grained fault rock into the surrounding cataclasite. The intrusive structures have ductile textures and emanate upward from a low‐density layer. We interpret the intrusions as products of a gravitational (Rayleigh‐Taylor) instability where the spacing between intrusions reflects the preferred wavelength of the flow. The spacing between intrusions is 1.4 ± 0.5 times the thickness of the layer. This low spacing‐to‐thickness ratio cannot be explained by a low Reynolds number flow but can be generated by one with moderate Reynolds numbers. Using a range of density contrasts and the geometry of the outcrop as constraints, we find that the distance between intrusions is best explained by moderately inertial flow with fluid velocities on the order of 10 cm/s. The angle that the intrusions are bent over implies that the horizontal slip velocity was comparable to the vertical rise velocity, and therefore, the fault was slipping at a speed of order 10 cm/s during emplacement. These slip velocities are typical of an earthquake or its immediate afterslip and thus require a coseismic origin. The Reynolds number of the buoyant flow requires a low viscous stress of at most 20 Pa during an earthquake.

Slipping

10.1029/2008jb005633

Cite

Citations (47)

The coupling of high-pressure oceanic and continental units in Alpine Corsica: Evidence for syn-exhumation tectonic erosion at the roof of the plate interface

Lithos (2019)

Maria Di Rosa Francesca Meneghini Michèle Marroni Chiara Frassi Luca Pandolfi

Blueschist

Continental Margin

10.1016/j.lithos.2019.105328

Cite

Citations (15)

Blueschist facies deformation mechanisms, rheology, and fault slip styles: preliminary observations on an exhumed subduction complex (Ishigaki-jima, SW Japan)

AGU Fall Meeting Abstracts (2020)

Sara De Caroli Åke Fagereng Kohtaro Ujiie Francesca Meneghini

Blueschist

Source

Cite

Citations (0)

Geological Society of America Bulletin

Francesca Meneghini Giulio Di Toro C. D. Rowe J. Casey Moore Akito Tsutsumi

official positions of the Society. citizenship, gender, religion, or political viewpoint. Opinions presented in this publication do not reflect presentation of diverse opinions and positions by scientists worldwide, regardless of their race, includes a reference to the article's full citation. GSA provides this and other forums for the the abstracts only of their articles on their own or their organization's Web site providing the posting to further education and science. This file may not be posted to any Web site, but authors may post works and to make unlimited copies of items in GSA's journals for noncommercial use in classrooms requests to GSA, to use a single figure, a single table, and/or a brief paragraph of text in subsequent their employment. Individual scientists are hereby granted permission, without fees or further Copyright not claimed on content prepared wholly by U.S. government employees within scope of

Paragraph

Presentation (obstetrics)

Table of contents

Scope (computer science)

Web site

Source

Cite

Citations (0)

The Passignano sul Trasimeno sheet of the 1.50.000 scale Geological Map of Italy: new insights about the northern Apennine geology from CARG Project results

Arnaldo Boscherini Massimiliano Rinaldo Barchi Luca Gasperini Michèle Marroni Andrea Motti

Geologic map

Source

Cite

Citations (3)

The processes of underthrusting and underplating in the geologic record: structural diversity between the Franciscan Complex (California), the Kodiak Complex (Alaska) and the Internal Ligurian Units (Italy)

Geological Journal (2009)

Francesca Meneghini Michèle Marroni J. Casey Moore Luca Pandolfi C. D. Rowe

Abstract Existing studies on active subduction margins have documented the wide diversity in structural style between accretionary prisms, both in space and time. Together with physical boundary conditions of the margins, the thickness of sedimentary successions carried by the lower plate seems to play a key role in controlling the deformation and fluid flow during accretion. We have tested the influence of the subducting sedimentary section by comparing the structural style and fluid‐related structures of four units from three fossil accretionary complexes characterized by similar physical conditions but different subducting sediment thicknesses: (1) the Franciscan Complex of California, (2) the Internal Ligurian Units of Italy and (3) the Kodiak Complex, Alaska. Subducting plates bearing a thick sedimentary cover generally result in coherent accretion through polyphase deformation represented by folding and thin thrusting events, while underplating of sediment‐starved oceanic sections results in diffuse deformation and mélange formation. These two structural styles can alternate through time in a single complex with a long record of accretion such as Kodiak. The parallel analysis of the selected analogues show that although the volume of sediments carried by the lower plate determines different structural styles, deformation is strongly controlled by injection of overpressured fluids during underthrusting and accretion. Transient hydrofracturing occurs through the development of a system of dilatant fractures grossly parallel to the décollement zone. Copyright © 2009 John Wiley & Sons, Ltd.

Underplating

Décollement

Accretionary wedge

Basement

10.1002/gj.1144

Cite

Citations (74)

Fluid flow during accretion in sediment-dominated margins: Evidence of a high-permeability fossil fault zone from the Internal Ligurian accretionary units of the Northern Apennines, Italy

Journal of Structural Geology (2006)

Francesca Meneghini Michèle Marroni Luca Pandolfi

Lithification

Décollement