Sosson Marc

Sosson Marc
Université Côte d'Azur

Phd. HDR
Researcher, Director of Geoazur Laboratory (UCA, CNRS, OCA, IRD)

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216
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Publications

Publications (216)
Article
Full-text available
This Special Publication presents the results of 15 different studies in the Black Sea- Caucasus segment of the Alpine-Tethys orogenic realm. The main focus of these studies is the style and timing of key tectonic events occurring primarily during the area's post-Pangaean evolution. The methodologies encompass: geophysics, including active and pass...
Article
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Abstract We report new observations in the Eastern Black Sea-Caucasus region that allow reconstructing the evolution of the Neotethys in the Cretaceous. At that time, the Neotethys oceanic plate was subducting northward below the continental Eurasia plate. Based on the analysis of the obducted ophiolites that crop out throughout Lesser Caucasus an...
Article
Full-text available
Abstract: The tectonic evolution of the Eastern Black Sea Basin has previously been explained based on offshore and onshore data, some of the latter from the Crimean Mountains (CM). However, changes in the stratigraphy of the CM have recently been proposed: the Late Triassic–Early Jurassic Tauric Group was assigned as younger (Albian). To clarify t...
Article
This paper presents a chronology of tectonic events in the Crimean Mountains (CM) based on a micro- (palaeo-stress) and macro-scale (tectonic structures) structural analysis since the Cretaceous. Recent studies have attempted to fit the geology of the CM into the geodynamic context of the subduction of the Neotethys plate beneath the Eurasian margi...
Conference Paper
Full-text available
Since the Triassic, the Caucasus domain has experienced a long and complex tectonic history related to the Tethys subduction beneath the Eurasian plate which originated opening of Back Arc Basins (BAB). The history of Tethys closure can be traced by the geological history of the Greater and Lesser Caucasus. The development of the Triassic trough us...
Conference Paper
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The Greater Caucasus is a great geological laboratory that gave birth to many models attempting to reconstruct the tectonic evolution of the Black Sea-Greater Caucasus domain as a part of the Alpine belt formed in a complex geodynamic setting of the long-lived subduction of the Tethys ocean (e.g. Adamia et al., 1981; Zonenshain and Le Pichon, 1986;...
Conference Paper
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It seems it is well established now that both sub-basins of the Black Sea (BS) back-arc basin (BAB) were opened during the Cretaceous, within the strong European continental lithosphere lying over a long-lived subduction zone (duration of 100-120 My). Then why the prevailing NW-SE direction of major tectonic structures and units of the Eastern Euro...
Conference Paper
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The Paleocene-Miocene Ararat basin is located in the foreland to the south of the NW-SE trending Lesser Caucasus orogenic belt in the Republic of Armenia.In the foreland to the north are the hydrocarbon-bearing Kura andRioni basins of Georgia. On the basis of recent studies in Armenia together with a critical review of previous work, we propose a n...
Conference Paper
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What is the main factor influencing the configuration of the Black Sea (BS) opening? Observing the structural patterns of European plate the NW-SE trending structures appear to be prevalent in it. Northern Dobrogea (ND) lies in the vicinity of the longest lineament of Europe the Trans European Suture Zone (TESZ), also known as TTL (Tornquist-Teisse...
Article
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The Sevan-Akera suture zone ophiolites are relics of a vast ophiolitic nappe which testifies a major obduction event, up to 300 km of horizontal transport, of the northern branch of Neotethys oceanic crust over the South Armenian/Taurides continental block. Near the locality of Amasia (NW Armenia), garnet bearing amphibolites are preserved within a...
Article
Full-text available
The Ararat depression, a Cenozoic intermountain basin of the Lesser Caucasus (in the Republic of Armenia), is the investigational target of this paper due to the ongoing debates concerning its structure, its origin and the potential development of structural traps in the frame of the Neotethys closure and finally the Arabia-Eurasia collision. We ar...
Conference Paper
Full-text available
The tectonic evolution of the Crimean Mountains (CM) as an uplifted fragment of the northern shelf of the Black Sea is a part of the geological history of the Greater Caucasus (GC) and the Black Sea (BS) domain. The Crimea owes its origin to the subduction of the Neotethys beneath the Eurasian margin which is the main geodynamical process that had...
Conference Paper
Full-text available
Abstract: The studies of the south-eastern part of the Ararat basin and neighboring mountain and intermountain depressions of the Republic of Armenia, allow reevaluating previous researches and revealing tectonic processes developed since the Late Cretaceous continental collision according to recent geodynamic concepts. The Ararat basin structural...
Conference Paper
Full-text available
Worldwide within mountain ranges the presence of sliver s of preserved oceanic lithosphere known as ophiolites evidence a tectonic process responsible for their emplacement on top of the continental crust called obduction. The first order anomaly inherent to this phenomenon is that dense rocks (ρ>3) end up on top of less dense rocks (ρ≈2.7). The dr...
Article
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Shagap syncline is elongated, asymmetric basin presented by Paleogene deposition of 1.5km thicknesses. Sedimentation took place in the basin, formed after collision of Eurasian plate and South Armenian Microcontinent (SAM). In Middle Eocene-Oligocene time piggyback basin (minor sedimentary basin developed on top of a moving thrust) is formed by dis...
Conference Paper
In the tectonic evolution of the Black Sea (BS) there are several unsolved questions: 1) the timing of the BS opening and 2) the timing of the Cenozoic shortening of the northern margin of the Eastern BS (EBS) basin. Mainly, the age-frame of the main compressional deformations is assumed as Oligo-Miocene, related to the Greater Caucasus (GC) basin...
Article
The Khoy region (NW Iran) is important in the clarification of the structural framework of the alpine belt between the Taurides, the Lesser Caucasus and theNWIran belt. The area is wellknown for these ophiolitic units. We present here new stratigraphic and structural data that can be used to reconstruct the tectonic evolution of this region and the...
Article
This article summarizes the geodynamic evolution of the Variscan to Mesozoic Tethyan subduction history, based on a review of geochronological data from Eastern Anatolia and the Lesser Caucasus, and new isotopic ages for the Georgian crystalline basements. The geological history of the basements of Georgia (Transcaucasus) and NE Turkey (eastern Pon...
Article
Full-text available
The ophiolites of NE Anatolia and of the Lesser Caucasus (NALC) evidence an obduction over ~200 kilometres of an oceanic lithosphere of Middle Jurassic age (c. 175-165 Ma) along an entire tectonic boundary (> 1000 km) at around 90 Ma. The obduction process is characterized by four first order geological constraints: (1) Ophiolites represent remnant...
Article
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Abstract: This paper is focused on petrological and geochemical data obtained on a series of Middle and Upper Eocene magmatic rocks from the Lesser Caucasus of Armenia in order to elucidate magma sources and geodynamic processes. Middle–Upper Eocene magmatism is present in two main zones: the Amasia–Sevan–Hakari suture zone (ASHSZ) and the so-calle...
Article
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We present arguments for an innovative tectonic set-up just prior to the Northern Neotethys obduction event in the NE Anatolian and Lesser Caucasus area. Along the Northern Neotethyan suture (the Ankara–Erzincan–Amasia–Sevan–Akera suture zone), relicts of the northern branch of the Neotethys oceanic domain outcrop as preserved unmetamorphosed slive...
Article
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The reason for obduction, or tectonic transport of oceanic lithosphere onto continents, is investigated by two-dimensional thermo-mechanical numerical modelling based on the geology of the Anatolia-Lesser Caucasus ophiolites. Heating of the oceanic domain and extension induced by far-field plate kinematics appear to be essential for the obduction o...
Article
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Abstract The Lesser Caucasus fold-and-thrust belt – part of the former Eurasian margin ‒ displays a peculiar northward arc-shaped geometry that was defined as an orocline in an earlier study. The Lesser Caucasus was affected by two main tectonic events that could have caused orocline formation: 1) late Cretaceous-Paleocene collision of the South Ar...
Article
The lithological nature of major interplate boundaries is estimated by a field analysis of a well preserved exhumed subduction channel in the Caucasus Karabakh region. From this field example the subduction channel is a narrow geological object of about 500 m width formed at approximate depth of 10 km along an Andean-type subduction zone. It is com...
Article
Full-text available
The Scythian Platform (ScP) with a heterogeneous basement of Baikalian-Variscan-Cimmerian age is located between the East European Craton (EEC) on the north and the Crimean-Caucasus orogenic belt and the Black Sea (BS) Basin on the south. In order to get new constrains on the basin architecture and crustal structure of the ScP and a better understa...
Article
The continental South Armenian Block - part of the Anatolide-Tauride South Armenian microplate - of Gondwana origin rifted from the African margin after the Triassic and collided with the Eurasian margin after the Late Cretaceous. During the Late Cretaceous, two northward dipping subduction zones were simultaneously active in the northern Neo-Tethy...
Article
The studies of the south-eastern part of the Ararat basin and neighboring mountain and intermountain depressions of the Republic of Armenia, allow reevaluating previous researches and revealing tectonic processes according to recent geodynamic concepts. The thrust and reverse stress regime of the study area was dominant during long period from coll...
Article
The studies of the south-eastern part of the Ararat basin and neighboring mountain and intermountain depressions of the Republic of Armenia, allow reevaluating previous researches and revealing tectonic processes according to recent geodynamic concepts. The thrust and reverse stress regime of the study area was dominant during long period from coll...
Conference Paper
Full-text available
The scientific objectives is focused on the reconstruction of the tectonic and geodynamic evolution of the Khoy domain. Consequently the main tasks on the field were to: 1.Collect new petrological and geochemical data of Khoy ophiolites, in order to compare them with those we previously obtained (MEBE and DARIUS programmes, data published by our gr...
Conference Paper
Full-text available
Researches in Crimea Mountains during the last decades were performed due to attempts to establish the stages of tectonic evolution of the Black Sea basin (Robinson et al., 1996; Nikishin et al., 2003, 2012, 2014; Saintot et al., 2006; Afanasenkov et al., 2007; Yudin, 2009; Stovba et al., 2009; Khriachtchevskaia et al., 2010; Stephenson and Schella...
Conference Paper
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First tectonic evidences of the rifting of the Black Sea in Crimea.
Conference Paper
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Les ophiolites du Petit Caucase et de NE Anatolie correspondent à un exemple extrême d'obduction puisqu'on constate un transport de fragments de Lithosphère océanique sur plusieurs centaines de kilomètres, à l'échelle de l'ensemble d'une bordure tectonique (>1000 km) vers 90 Ma. En adoptant une stratégie pluridisciplinaire lors de l'étude des ophio...
Conference Paper
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Les ophiolites du Petit Caucase et de NE Anatolie correspondent à un exemple extrême d'obduction avec un transport de Lithosphère océanique datée du Jurassique moyen (c. 175~165 Ma) sur plusieurs centaines de kilomètres, à l'échelle de l'ensemble d'une bordure tectonique (>1000 km) vers 90 Ma. L'ensemble des données géologiques obtenues plaide pour...
Article
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This paper presents new geological constraints on the collision of southern Central America with South America, and the resulting deformational episodes that have affected the Panama Isthmus since the Late Cretaceous. The Panama Isthmus is located in southwestern Central America, and it represents the zone of contact between the two land masses: Ce...
Conference Paper
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New datings (by Nannofossils assemblages) and structural data from flysch formations of the Crimea Peninsula (Ukraine): consequence on the tectonic evolution of the Eastern Black Sea. The Crimea Mountains are the part of " alpine belt " and in general structural framework are located in its northern branch, appearing as an inverted part of the nort...
Conference Paper
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Since last decade a lot of new field researches (supported by MEBE and DARIUS programmes) were carried out in order to clarify the tectonic evolution of the South Caucasus and Eastern Black Sea regions. A summary of these improvements are as following:
Article
Full-text available
On the base of French-Ukrainian collaboration (DARIUS program), in the eastern part of the Crimea Mountain the first stage of field work was performed, during which the samples of flysch rocks were taken for micropaleontological analysis (Nanofossilsdating). It made possible to plot the first variant of structural geological map of this area and re...
Article
Full-text available
The remnants of a Mesozoic oceanic realm exist in the Lesser Caucasus (mainly in Armenia and Karabagh); this realm was once part of the Tethyan oceanic branch positioned between Eurasia and the South-Armenian Block, a Gondwana-derived terrain that can be considered as part of the Tauride-Anatolide plate. The existing Tethyan rocks of Lesser Caucasu...
Article
Full-text available
In the Lesser Caucasus and NE Anatolia three domains are distinguished from south to north: (1) Gondwanian-derived continental terranes represented by the South Armenian Block (SAB) and the Tauride-Anatolide Platform (TAP), (2) scattered outcrops of Mesozoic ophiolites, obducted during the Upper Cretaceous times, marking the northern Neotethys sutu...
Data
The morphology of Patia and Mira canyons on the South Colombian convergent margin reflects an interplay between tectonic deformation, sea-level variation and canyon evolution, and provides new insight into the age and location of margin deformation over the last ~150 ka. Multibeam bathymetry, seismic, and sedimentary data reveal that tectonically a...
Conference Paper
Full-text available
Outcrops of preserved oceanic lithosphere overthrusted onto the continental South Armenian Block (SAB) from the north are found throughout the Lesser Caucasus. Previous works using geochemical whole-rock analyses, 40Ar/39Ar and paleontological dating have shown that the ophiolite outcrops throughout this area were emplaced during the Upper Cretaceo...
Conference Paper
Full-text available
In the Lesser Caucasus three main domains are distinguished from SW to NE: (1) the South Armenian Block (SAB), a Gondwanian-derived continental terrane; (2) scattered outcrops of ophiolites coming up against the Sevan-Akera suture zone; and (3) the Eurasian plate. The Armenian ophiolites represent remnants of an oceanic domain which disappeared dur...
Article
Full-text available
The ophiolites of Amasia in the northwestern part of the Sevan–Akera suture zone Lesser Caucasus, NW Armenia) correspond to a well-preserved example of a major obduction of oceanic lithosphere over the South Armenian continental block. Our mapping evidenced a series of (1) un-metamorphosed gabbroic oceanic crust, (2) serpentinites and a greenschist...
Conference Paper
Full-text available
The Crimea Mountains are the part of “alpine belt” and in general structural framework are located in its northern branch, appearing as an inverted part of the northwestern passive margin of the East Black Sea (Nikishin et al.2001). In addition, it has the similarities with the Greater Caucasus and contains the indications of tectonic events relate...