T. Henstock

Lower melt focusing efficiency governs the formation of extremely thin oceanic crust at superfast spreading centers

Yuhan Li, Adina E. Pusok, Ingo Grevemeyer, T. Henstock et autres

de, gb, fr (code pays fourni par la source)

Testing Models of Active Extension (TMAX) in the Corinth rift

Derek Keir, Lisa Clare McNeill, T. Henstock, Rebecca Bell et autres

Temporary onshore and offshore deployment of passive seismometers to better understand seismicity of the Corinth rift. The network will comprise 10 OBS (of which 4 are broadband and 6 are short-period), and 25 land-based seismic stations. 15 of the land stations will …

gb, gr (code pays fourni par la source)

Seismic wide-angle constraints on crustal thickness and structure at Ocean Drilling Program Site 1256: How typical are its features for oceanic crust?

Ingo Grevemeyer, T. Henstock, M. Marjanović, Cord Papenberg et autres

Abstract Ocean Drilling Program Site 1256 was drilled in the Guatemala Basin, eastern Pacific Ocean, sampling superfast-spreading crust. It is one of the deepest drill holes sampling intact oceanic crust and the only site that has penetrated gabbroic rocks away from a …

de, gb, fr (code pays fourni par la source)

2D microscale finite element modelling of seismic P-wave propagation in marine saturated sands to predict geotechnical parameters

J.A. Charles, Susan Gourvenec, T. Henstock, M.E. Vardy

gb (code pays fourni par la source)

Impact of seamounts on the hydration of subducting plates

Yuhan Li, Ingo Grevemeyer, A. H. Robinson, T. Henstock et autres

Abstract The subduction of seamounts greatly affects arc volcanism, earthquakes, and tectonic deformation of the overriding plate, but the role of seamounts during bending and hydration of the incoming plate at subduction zones is poorly understood. We present seismic tomographic results along …

de, gb, fr, it, es (code pays fourni par la source)

Estimating excess bound water content due to serpentinisation in mature slow-spreading oceanic crust using Vp/Vs

Lianjun Li, Jenny Collier, T. Henstock, Saskia Goes

Mature oceanic crust carries chemically bound water which may be released in subduction zones or delivered to the deep mantle. Estimating water content in slow-spreading crust is challenging due to its complex lithology, requiring both P- and S-wave seismic velocity (Vp and …

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Volcanic eruptions and the global subsea telecommunications network

Michael Clare, Isobel Yeo, Jacob Nash, James E. Hunt et autres

When the first transoceanic telegraph cables were laid in the mid-1800s, rapid communication between continents became possible. The advent of fibre-optic submarine cables in the 1990s catalyzed a global digital revolution. Today, a network of > 1.7 million kilometres of fibre-optic cables …

gb, to, lc, nz, us, tt (code pays fourni par la source)

Assessment of Synthetic CPTs in Monopile Design for Offshore Wind Turbines: A Case Study

C. Anastassopoulos, Josette Crispin, Mark E. Vardy, T. Henstock et autres

Summary Synthetic cone penetrometer tests (CPTs) enable profiles of geotechnical resistance to be derived from 2D or 3D geophysical seismic survey data at any location across a wind farm site, alleviating dependence on interpolation between geotechnical CPTs. However, the lower vertical resolution …

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Automated Quantification of Modal Layering in Ancient Lower Oceanic Crust Using Computer Vision

L.J.C. Grant, Rosalind M. Coggon, A. Evans, Blair Thornton et autres

Ocean crustal veins record dynamic interplay between plate-cooling-induced cracking and ocean chemistry

A. Evans, Rosalind M. Coggon, Michelle Harris, Elliot J. Carter et autres

• Ocean crustal veins reflect dynamic evolution in ocean chemistry and plate cooling. • Veins widths and strain increase with crustal age, while vein densities remain constant. • Elemental mapping reveals multiple precipitation and fracturing episodes. • Ocean plate cooling drives vein …

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Structural Variation Along the Southern Hikurangi Subduction Zone, Aotearoa New Zealand, From Seismic Reflection and Retro‐Deformation Analysis

Duncan E. Stevens, L.C. McNeill, T. Henstock, Philip M. Barnes et autres

Abstract The southern Hikurangi subduction zone exhibits significant along‐strike variation in convergence rate and obliquity, sediment thickness and, uniquely, the increasing proximity of southern Hikurangi to, and impingement on, the incoming continental Chatham Rise, an ancient Gondwana accretionary complex. There are corresponding …

gb, nz, de, us (code pays fourni par la source)

Downward continued ocean bottom seismometer data show continued hydrothermal evolution of mature oceanic upper crust

Lianjun Li, Jenny Collier, T. Henstock, Saskia Goes

Abstract Heat flow measurements indicate hydrothermal activity in oceanic crust continues at least for 65 m.y. after formation. Hydrothermal activity progressively fills cracks and pores with alteration products, which is expected to lead to a trend of increasing seismic velocities with age. …

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