scholarly journals Tectonic evolution of Les Saintes archipelago (Guadeloupe, French West Indies): relation with the Lesser Antilles arc system

2016 ◽  
Vol 187 (1) ◽  
pp. 3-10 ◽  
Author(s):  
Verati Chrystèle ◽  
Yves Mazabraud ◽  
Jean-Marc Lardeaux ◽  
Michel Corsini ◽  
Dorian Schneider ◽  
...  
Keyword(s):  
Tectonic Evolution ◽  
Volcanic Rocks ◽  
Lesser Antilles ◽  
Geothermal System ◽  
Fault Systems ◽  
Strain Pattern ◽  
Relative Chronology ◽  
Oblique Convergence ◽  
The One ◽  
Les Saintes

Abstract In this paper, we provide the first structural map of Les Saintes archipelago (Guadeloupe, Lesser Antilles). The finite strain pattern displays four families of fault systems characterized by their statistical structural orientations: N000-N020, N050-N070, N090-N110 and N130-N140 trending fault systems. Our onshore results thus underline a fault network much more complex than the one depicted by the previous offshore geophysical investigations around Les Saintes archipelago, which show only N120-N150 trending system. According to the available K-Ar dating of the volcanic rocks and the relative chronology of the faults defined in the field, we determine the deformation history in Les Saintes islands since the last 3 Ma. The four highlighted trending fault systems are already active since the Pliocene and are consistent with the present-day extensional tectonics in the Guadeloupe archipelago compatible with the reactivation of inherited structures at the active arc scale. We interpret the tectonic evolution of Les Saintes islands as the result of interplay between subduction of aseismic ridges (Tiburon and Barracuda ridges) and oblique convergence. Furthermore, we recognized an exhumed geothermal paleo-system in Terre-de-Haut island which is a good analogue of the present-day active Bouillante geothermal system. Its duration is estimated at 400 k.y. during the Pliocene.

scholarly journals Petrology of Plutonic Xenoliths and Volcanic Rocks from Grenada, Lesser Antilles

2014 ◽  
Vol 55 (7) ◽  
pp. 1353-1387 ◽  
Author(s):  
C. C. Stamper ◽  
J. D. Blundy ◽  
R. J. Arculus ◽  
E. Melekhova
Keyword(s):  
Volcanic Rocks ◽  
Lesser Antilles

scholarly journals Ancient xenocrystic zircon in young volcanic rocks of the southern Lesser Antilles island arc

Lithos ◽  
2017 ◽  
Vol 290-291 ◽  
pp. 228-252 ◽  
Author(s):  
Yamirka Rojas-Agramonte ◽  
Ian S. Williams ◽  
Richard Arculus ◽  
Alfred Kröner ◽  
Antonio García-Casco ◽  
...  
Keyword(s):  
Volcanic Rocks ◽  
Island Arc ◽  
Lesser Antilles

scholarly journals Geomagnetic Survey to Explore High-Temperature Geothermal System in Blawan-Ijen, East Java, Indonesia

2018 ◽  
Vol 31 ◽  
pp. 02003 ◽  
Author(s):  
Yunus Daud ◽  
Syamsu Rosid ◽  
Fikri Fahmi ◽  
Faris Maulana Yunus ◽  
Reza Muflihendri
Keyword(s):  
High Temperature ◽  
Magnetic Anomaly ◽  
Volcanic Rocks ◽  
Hydrothermal Activity ◽  
Geothermal System ◽  
Geothermal Area ◽  
Variation Reduction ◽  
Geomagnetic Survey ◽  
Surface Alteration ◽  
Steep Topography

Ijen geothermal area is high-temperature geothermal system located in Bondowoso regency, East Java. It is categorized as caldera-hosted geothermal system which is covered by quaternary andesitic volcanic rocks with steep topography at the surrounding. Several surface thermal manifestations are found, such as altered rocks near Mt. Kukusan and a group of Blawan hotsprings in the northern part of the caldera. Geomagnetic survey was conducted at 72 stations which is distributed inside the caldera to delineate the existence of hydrothermal activity. Magnetic anomaly was obtained by reducing total magnetic measured on the field by IGRF and diurnal variation. Reduction to pole (RTP) method was applied with geomagnetic inclination of about -32°. In general, the result shows that high magnetic anomaly is distributed at the boundary of study area, while low magnetic anomaly is observed in the centre. The low anomaly indicates demagnetized rock that probably caused by hydrothermal activity. It has a good correlation with surface alteration observed close to Mt. Kukusan as well as high temperature reservoir drilled in the centre of caldera. Accordingly, the low magnetic anomaly also presents the possibility of geothermal reservoir in Ijen geothermal area.

scholarly journals Analysis of the material culture and new radiocarbon dating of the Early Neolithic site of Amnya I

2019 ◽  
Vol 8 (2) ◽  
pp. 149-159
Author(s):  
Ekaterina Nikolaevna Dubovtseva ◽  
Lubov Lvovna Kosinskaya ◽  
Henny Piezonka
Keyword(s):  
Material Culture ◽  
Western Siberia ◽  
Northern Taiga ◽  
Taiga Zone ◽  
Early Neolithic ◽  
Neolithic Site ◽  
Relative Chronology ◽  
The One ◽  
Technological Analysis ◽  
Khanty Mansi Autonomous

The ancient fortified settlement of Amnya I is a unique Early Neolithic site in the northern taiga zone of Western Siberia (Khanty-Mansi Autonomous Okrug, the Amnya river). It is located on a promontory and has three lines of defense and ten dwelling depressions. The structures of the excavated dwellings are very similar, though the artifact assemblage appears rather heterogeneous. We carried out a technical and technological analysis of ceramics, which showed no correlation between the texture, on the one hand, and the morphology and ornamentation of pots on the other one. Planiographic analysis of ceramics showed that vessels with comb and incising patterns are found in different dwellings, although there are objects in which both groups lie together. Various categories of stone implements (bladelets and polished arrowheads) also appear on different parts of the settlement. Most likely, the observed differences in the artefact complexes of objects are associated with the stages of the functioning of the settlement. The absolute chronology does not yet clarify the sequence of erection and existence of objects. New AMS date is probably vulnerable to a significant reservoir effect. The abundance of unsolved issues of absolute and relative chronology makes the resumption of research on this unique site urgent.

Geologic and Tectonic Evolution of the Yinkiong Group and Abor Volcanic Rocks in the Eastern Himalaya: An Overview of Geologic Data

Geotectonics ◽  
2020 ◽  
Vol 54 (3) ◽  
pp. 395-409
Author(s):  
M. Sarma ◽  
D. Bezbaruah ◽  
T. K. Goswami ◽  
U. Baral
Keyword(s):  
Tectonic Evolution ◽  
Volcanic Rocks ◽  
Eastern Himalaya ◽  
Geologic Data

Simulation of the 2004 tsunami of Les Saintes in Guadeloupe (Lesser Antilles) using new source constraints

2020 ◽  
Vol 103 (2) ◽  
pp. 2103-2129
Author(s):  
Louise Cordrie ◽  
Audrey Gailler ◽  
Javier Escartin ◽  
Nathalie Feuillet ◽  
Philippe Heinrich
Keyword(s):  
Lesser Antilles ◽  
Les Saintes ◽  
2004 Tsunami

Evolution of the south-central segment of the Archean Abitibi Belt, Quebec. Part II: Tectonic evolution and geomechanical model

1983 ◽  
Vol 20 (9) ◽  
pp. 1355-1373 ◽  
Author(s):  
Erich Dimroth ◽  
Lazlo Imreh ◽  
Normand Goulet ◽  
Michel Rocheleau
Keyword(s):  
Tectonic Evolution ◽  
Anisotropic Plate ◽  
Volcanic Rocks ◽  
Sedimentary Rocks ◽  
Normal Fault ◽  
Geomechanical Model ◽  
Southwestern Part ◽  
South Central ◽  
Central Segment ◽  
Volcanic Terrain

In this paper, we describe the relations between the paleogeographic and tectonic evolution of the southwestern part of the Archean Abitibi and Bellecombe belts. Volcanism in the Abitibi Belt created a very thick, anisotropic plate composed of competent volcanic rocks and broken by the Duparquet–Destor break. The depocenters of the upper division of diverse volcanic rocks subsided about 10 km relative to their surroundings, and some central volcanic complexes within this division were consolidated by synvolcanic plutons and their thermal metamorphic aureole. The Cadillac break, a normal fault, separated the Abitibi and Bellecombe belts. The latter consisted of comparatively incompetent sedimentary rocks on top of a basement composed of ultramafic–mafic flows.North–south compression of the volcanic terrain during the Kenoran Orogeny produced a set of flexure folds, F1, that curve around the consolidated cores of central volcanic complexes generally in an easterly direction. Synclinoria nucleated at the deeply subsident depocenters of the upper diverse division. Further north–south flattening and subvertical stretching produced the east-trending F2 folds, their axial-plane schistosity S2, and local superposed schistosities S3 and S4. Southward verging recumbent folds suggest that the Bellecombe Belt simultaneously was pulled northward below the Abitibi Belt. During the orogeny, the Duparquet–Destor and Cadillac breaks were transformed to thrust faults; the Duparquet–Destor break also shows minor (< 3 km) right-lateral strike slip. Diapiric rise of late- to post-kinematic plutons locally distorted earlier schistosities.

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