Fred Jourdan
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View article: The Submarine Trachytic Lobe–Hyaloclastite Complex of the Caldera of Taburiente (La Palma, Canary Islands): The Age and Meaning of the Oldest Geological Formation on the Island
The Submarine Trachytic Lobe–Hyaloclastite Complex of the Caldera of Taburiente (La Palma, Canary Islands): The Age and Meaning of the Oldest Geological Formation on the Island Open
This paper describes for the first time a lobe–hyaloclastite felsic complex on an oceanic island of intraplate setting. In the submarine volcanic succession of the Basal Complex of La Palma (Canary Islands), two main units are identified: …
View article: Coupled hydrothermal venting and hydrocarbon seepage discovered at Conical Seamount, Papua New Guinea
Coupled hydrothermal venting and hydrocarbon seepage discovered at Conical Seamount, Papua New Guinea Open
During research expedition SO299 with the German RV Sonne , we discovered the first deep-sea hydrothermal vent system along the Tabar-Lihir-Tanga-Feni island chain in northeastern Papua New Guinea. The Karambusel vent field is hosted by a …
View article: Impact-induced sublimation drives volatile depletion in carbonaceous meteorites
Impact-induced sublimation drives volatile depletion in carbonaceous meteorites Open
Carbonaceous chondrites are amongst the most chemically primitive solid materials in the Solar System, yet many are depleted in moderately volatile elements. Here, we report enrichments in heavier zinc isotopes in heated carbonaceous chond…
View article: Tectono-sedimentary evolution of the North Danube Basin: insights from 40Ar/39Ar geochronology and basin modeling within the Pannonian back-arc system
Tectono-sedimentary evolution of the North Danube Basin: insights from 40Ar/39Ar geochronology and basin modeling within the Pannonian back-arc system Open
The Pannonian Basin System, comprising multiple sub-basins, forms the broader geological framework of this study, which focuses specifically on the North Danube Basin. Geochronology, sediment accumulation patterns, and tectonic subsidence …
View article: Poços de Caldas – Cabo Frio Alignment: a Petrochronological Review of an Unconventional Plume Model
Poços de Caldas – Cabo Frio Alignment: a Petrochronological Review of an Unconventional Plume Model Open
This work reviews the Poços de Caldas – Cabo Frio Alignment (PCCFA), one of Brazil's alkaline igneous provinces, comprising syenites, phonolites, and trachytes, as well as magmatic breccias. TAS and Harker (for major and trace elements) di…
View article: Motions of the Kerguelen hotspot constrained by high-precision 40Ar/39Ar ages of the Ninetyeast Ridge
Motions of the Kerguelen hotspot constrained by high-precision 40Ar/39Ar ages of the Ninetyeast Ridge Open
Hotspots create linear volcanic features on Earth’s crust as tectonic plates migrate over and thus are often used to trace absolute plate motion. The effectiveness of a hotspot reference frame depends on the hotspot’s fixity or…
View article: Time-Dependent Evolution And Source Heterogeneities of Ocean Island Basalts From a Weak Plume, São Jorge, Azores
Time-Dependent Evolution And Source Heterogeneities of Ocean Island Basalts From a Weak Plume, São Jorge, Azores Open
The geochemical composition of ocean island basalts (OIBs) from the Azores (AZ) reflects the spatial distribution, shape and temporal evolution of small-scale geochemical heterogeneities within their mantle plume source. Here, we investiga…
View article: The Arpu Kuilpu meteorite: In‐depth characterization of an <scp>H5</scp> chondrite delivered from a Jupiter Family Comet orbit
The Arpu Kuilpu meteorite: In‐depth characterization of an <span>H5</span> chondrite delivered from a Jupiter Family Comet orbit Open
Over the Nullarbor Plain in South Australia, the Desert Fireball Network detected a fireball on the night of June 1, 2019 (7:30 pm local time), and 6 weeks later recovered a single meteorite (42 g) named Arpu Kuilpu. This meteorite was the…
View article: The Arpu Kuilpu Meteorite: In-depth characterization of an H5 chondrite delivered from a Jupiter Family Comet orbit
The Arpu Kuilpu Meteorite: In-depth characterization of an H5 chondrite delivered from a Jupiter Family Comet orbit Open
Over the Nullarbor Plain in South Australia, the Desert Fireball Network detected a fireball on the night of 1 June 2019 (7:30 pm local time), and six weeks later recovered a single meteorite (42 g) named Arpu Kuilpu. This meteorite was th…
View article: Asteroid (101955) Bennu in the laboratory: Properties of the sample collected by <scp>OSIRIS</scp>‐<scp>REx</scp>
Asteroid (101955) Bennu in the laboratory: Properties of the sample collected by <span>OSIRIS</span>‐<span>REx</span> Open
On September 24, 2023, NASA's OSIRIS‐REx mission dropped a capsule to Earth containing ~120 g of pristine carbonaceous regolith from Bennu. We describe the delivery and initial allocation of this asteroid sample and introduce its bulk phys…
View article: How old is the Eye of Africa? A polyphase history for the igneous Richat Structure, Mauritania
How old is the Eye of Africa? A polyphase history for the igneous Richat Structure, Mauritania Open
The annular Richat Structure, in Mauritania, is among the most striking geological features on Earth visible from space. Nicknamed “the Eye of Africa”, its intriguing concentric shaping has drawn attention for several decades. Formerly hyp…
View article: Geochemical and isotopic constraints on the petrogenesis of the Cretaceous alkaline Morro Redondo intrusive complex, Rio de Janeiro, Brazil: implications for alkaline magma genesis
Geochemical and isotopic constraints on the petrogenesis of the Cretaceous alkaline Morro Redondo intrusive complex, Rio de Janeiro, Brazil: implications for alkaline magma genesis Open
T The Morro Redondo Complex is composed of plutonic and volcanic alkaline rocks. This igneous complex is part of the Poços de Caldas - Cabo Frio Magmatic Alignment (PCCFA). This study aims to contribute to the understanding of the petrogen…
View article: Asteroid (101955) Bennu in the Laboratory: Properties of the Sample Collected by OSIRIS-REx
Asteroid (101955) Bennu in the Laboratory: Properties of the Sample Collected by OSIRIS-REx Open
On 24 September 2023, the NASA OSIRIS-REx mission dropped a capsule to Earth containing approximately 120 g of pristine carbonaceous regolith from Bennu. We describe the delivery and initial allocation of this asteroid sample and introduce…
View article: Curation protocol of Phobos sample returned by Martian Moons eXploration
Curation protocol of Phobos sample returned by Martian Moons eXploration Open
Japan Aerospace Exploration Agency's Martian Moons eXploration (MMX) mission will launch a spacecraft in 2024 to return samples from Phobos in 2029. Curatorial work for the returned Phobos samples is critical for the sample allocation with…
View article: Geology and<sup>40</sup>Ar/<sup>39</sup>Ar age of the Khopoli olivine gabbro intrusion, Konkan Plain, western Deccan Traps
Geology and<sup>40</sup>Ar/<sup>39</sup>Ar age of the Khopoli olivine gabbro intrusion, Konkan Plain, western Deccan Traps Open
The Khopoli intrusion is a small olivine gabbro intrusion exposed in the Konkan Plain, in the western part of the Deccan Traps continental flood basalt province. It intrudes lavas of the Neral and Thakurvadi formations, which belong to the…