La geologie de l'Himalaya de l'Arun

1955 ◽  
Vol S6-V (7-9) ◽  
pp. 529-542 ◽  
Author(s):  
Pierre Bordet ◽  
M. Latreille
Keyword(s):  
Sedimentary Cover ◽  
Lower Zone ◽  
The South ◽  
Lower Miocene ◽  
Structural Details ◽  
Ganges Plain ◽  
Middle Siwalik ◽  
The Ganges ◽  
East West ◽  
Rapid Uplift

Abstract Presents stratigraphic and structural details of the Arun valley in the Himalayan range (eastern Nepal) as a supplement to data in previously published papers. The formations of the Ganges plain are probably Quaternary; the Dharan series is comparable to the middle Siwalik beds, dated as lower Miocene; the Sangouri series is Permo-Triassic; the sedimentary cover of the lower zone includes Cambrian to Carboniferous strata, and the underlying migmatites are then Precambrian; in the high peaks, the Everest series probably represents the base of the Paleozoic, and the underlying Barun gneiss is therefore probably Precambrian. Structures include an east-west system of faults and transverse north-south folds. Rapid uplift is actually taking place along the south border of the range.

Borges the Post-Orientalist

2017 ◽  
Author(s):  
Robin Fiddian
Keyword(s):  
South Atlantic ◽  
Conclusive Evidence ◽  
Binary Opposition ◽  
The South ◽  
Civilization And Barbarism ◽  
The Stranger ◽  
East West

The chapter examines several works including ‘The East’, ‘A Thousand and One Nights’, and ‘Buddhism’, which are on subjects relating to the East, and finds conclusive evidence of a post-Orientalist optic in Borges’s writing at this point in his life. Japan inspires ‘The Stranger’ and ‘Nihon’, both included in The Limit and outstanding examples of Borges’s wit and craftsmanship. A comparison between ‘Nihon’ and ‘Story of the Warrior and the Captive Woman’ from an earlier collection illustrates Borges’s evolved approach to the binary opposition between civilization and barbarism, across the East–West divide. Two milongas are also studied in the context of the war in the South Atlantic (1982) and point to a disillusioned conclusion about Argentina 170 years on from formal independence in 1810.

Geologic-geochemical and modelling studies of hydrocarbon migration in the South Caspian basin

2020 ◽  
pp. 4-15
Author(s):  
M.F. Tagiyev ◽  
◽  
I.N. Askerov ◽  
◽  
◽  
...  
Keyword(s):  
Sedimentary Cover ◽  
Geochemical Data ◽  
Caspian Basin ◽  
Hydrocarbon Generation ◽  
The South ◽  
South Caspian Basin ◽  
Hydrocarbon Migration ◽  
Upward Migration ◽  
Modelling Studies ◽  
Hydrocarbon Charge

Based on pyrolysis data an overview is given on the generative potential and maturity of individual stratigraphic units in the South Caspian sedimentary cover. Furthermore, the pyrolysis analyses indicate that the Lower Pliocene Productive Series being immature itself is likely to have received hydrocarbon charge from the underlying older strata. The present state of the art in studying hydrocarbon migration and the "source-accumulation" type relationship between source sediments and reservoired oils in the South Caspian basin are touched upon. The views of and geochemical arguments by different authors for charging the Lower Pliocene Productive Series reservoirs with hydrocarbons from the underlying Oligocene-Miocene source layers are presented. Quantitative aspects of hydrocarbon generation, fluid dynamics, and formation of anomalous temperature & pressure fields based on the results of basin modelling in Azerbaijan are considered. Based on geochemical data analysis and modelling studies, as well as honouring reports by other workers the importance and necessity of upward migration for hydrocarbon transfer from deep generation centers to reservoirs of the Productive Series are shown.

scholarly journals War or Peace on the Rivers of South Asia?

2020 ◽  
Vol 4 (1) ◽  
pp. 242-254
Author(s):  
Muhammad Imran Mehsud ◽  
Azam Jan ◽  
Tariq Anwar Khan
Keyword(s):  
South Asia ◽  
Water Relations ◽  
South Asian ◽  
The Other ◽  
The South ◽  
Water Sharing ◽  
The Ganges

The renowned water expert, John Briscoe, predicted a bleak future for India-Pakistan water relations across the Indus attributing it to Pakistan’s downstream anxieties vis-à-vis upstream regional hegemon-India. Do the other co-riparian states of India share the same bleak future across the South Asian rivers of the Ganges, Brahmaputra, and Meghna or are the water relations across these rivers peaceful as compared to the Indus? To answer this question, this study first explores India-Pakistan water disputes on the Indus and then analyses India-Bangladesh water disputes on the Ganges and Brahmaputra, India-Nepal, India-Bhutan, and Pakistan-Afghanistan water relations. The methodology adopted for this study is descriptive, historical, and analytical in its nature. The study concludes that India has not only failed to adopt a conciliatory approach towards Pakistan on the Indus but has generated mistrust amongst other neighbouring countries over water sharing due to its hegemonic hydro-behaviour. It recommends that India should adopt a conciliatory approach to have peaceful relations across the rivers of South Asia.

Geodynamics of the France Southeast Basin

2010 ◽  
Vol 181 (6) ◽  
pp. 477-501 ◽  
Author(s):  
Xavier Le Pichon ◽  
Claude Rangin ◽  
Youri Hamon ◽  
Nicolas Loget ◽  
Jin Ying Lin ◽  
...  
Keyword(s):  
Seismic Activity ◽  
Sedimentary Cover ◽  
Central Basin ◽  
The South ◽  
Western Basin ◽  
Active Deformation ◽  
The North ◽  
The Alps ◽  
Sediment Cover ◽  
Surrounding Areas

AbstractWe investigate the geodynamics of the Southeast Basin with the help of maps of the basement and of major sedimentary horizons based on available seismic reflection profiles and drill holes. We also present a study of the seismicity along the Middle Durance fault. The present seismic activity of the SE Basin cannot be attributed to the Africa/Eurasia shortening since spatial geodesy demonstrates that there is no significant motion of Corsica-Sardinia with respect to Eurasia and since gravitational collapse of the Alps has characterized the last few millions years. Our study demonstrates that the basement of this 140 by 200 km Triassic basin has been essentially undeformed since its formation, most probably because of the hardening of the cooling lithosphere after its 50% thinning during the Triassic distension. The regional geodynamics are thus dominated by the interaction of this rigid unit with the surrounding zones of active deformation. The 12 km thick Mesozoic sediment cover includes at its base an up to 4 km thick mostly evaporitic Triassic layer that is hot and consequently highly fluid. The sedimentary cover is thus decoupled from the basement. As a result, the sedimentary cover does not have enough strength to produce reliefs exceeding about 500 to 750 m. That the deformation and seismicity affecting the basin are the results of cover tectonics is confirmed by the fact that seismic activity in the basin only affects the sedimentary cover. Based on our mapping of the structure of the basin, we propose a simple mechanism accounting for the Neogene deformation of the sedimentary cover. The formation of the higher Alps has first resulted to the north in the shortening of the Diois-Baronnies sedimentary cover that elevated the top of Jurassic horizons by about 4 km with respect to surrounding areas to the south and west. There was thus passage from a brittle-ductile basement decollement within the higher Alps to an evaporitic decollement within the Diois-Baronnies. This shortening and consequent elevation finally induced the southward motion of the basin cover south of the Lure mountain during and after the Middle Miocene. This southward motion was absorbed by the formation of the Luberon and Trévaresse mountains to the south. To the east of the Durance fault, there is no large sediment cover. The seismicity there, is related to the absorption of the Alps collapse within the basement itself. To the west of the Salon-Cavaillon fault, on the other hand, gravity induces a NNE motion of the sedimentary cover with extension to the south and shortening to the north near Mont Ventoux. When considering the seismicity of this area, it is thus important to distinguish between the western Basin panel, west of the Salon-Cavaillon fault affected by very slow NNE gliding of the sedimentary cover, with extension to the south and shortening to the north; the central Basin panel west of the Durance fault with S gliding of the sedimentary cover and increasing shortening to the south; and finally the basement panel east of the Durance fault with intrabasement absorption of the Alps collapse through strike-slip and thrust faults.

The arc of the Western Alps : understanding its kinematics and formation mechanisms based on new structural and paleomagnetic datas, and thermo-mechanical modelling.

2021 ◽  
Author(s):  
Quentin Brunsmann ◽  
Claudio Rosenberg ◽  
Nicolas Bellahsen ◽  
Laetitia Le Pourhiet
Keyword(s):  
Western Alps ◽  
Strike Slip ◽  
Rheological Parameters ◽  
The South ◽  
Adriatic Plate ◽  
The North ◽  
Field Evidence ◽  
Internal Zone ◽  
The Alps ◽  
East West

<p>The Alps have an overall East-West orientation, which changes radically in their western termination, where they rotate southward into a N-S strike, and then eastward into an E-W strike, forming the arc of the Western Alps. This arc is commonly inferred to have formed during collision, due to indentation of the Adriatic plate into the European continental margin. Several models attempted to provide a kinematic explanation for the formation of this arched, lateral end of the Alps. Indeed, the radial nature of the transport directions observed along the arc of the Western Alps cannot be explained by a classic convergence model.<br>For more than 50 years the formation of this arc was been associated to westward-directed indentation of Adria, accommodated along East-West oriented strike-slip faults, a sinistral one in the South of the arc and a dextral one in the North. The dextral one correspond to the Insubric Fault. The sinistral strike-slip zone, inferred to be localized along the «Stura corridor» (Piedmont, Italy) would correspond to a displacement of 100 to 150 km according to palaeogeographical, and geometric analyses. However, field evidence is scarce and barely documented in the literature.<br>Vertical axis rotations of the Adriatic indenter also inferred to be syn-collisional could have influenced the acquisition of the morphology of the arc. Paleomagnetic analyses carried out in the Internal Zone and in the Po plain suggest a southward increading amount of counter-clockwise rotation of the Adriatic plate and the Internal Zone, varying from 20°-25° in the North to nearly 120° in the South.<br>Dextral shear zones possibly accommodating this rotation in some conceptual models is observed in several places below the Penninic Front and affect the Argentera massif to the south. However, the measured displacement quantities do not appear to be equivalent to those induced by such rotations.<br>The present study aims to constrain the kinematic evolution of the arc of the Western Alps through a multidisciplinary approach. The first aspect of this project is the structural analysis of the area (Stura corridor) inferred to accommodate large sinistral displacements allowing for the westward indentation of the Adriatic indenter. We discuss the general lack of field evidence supporting sinistral strike-slip movements, in contrast to large-scale compilation of structures suggesting the possible occurrence of such displacement. The second part consists of a palaeomagnetic study, in which new data are integred with a compilation of already existing data. This compilation shows that several parts of the arc in the External Zone did not suffer any Cenozoic rotations, hence suggesting that a proto-arc already axisted at the onset collision, as suggested by independent evidence of some paleogeographic reconstruction. Finally, 2D and 3D thermo-mechanical modeling in using the pTatin3D code is used to test which structural (geometrical), and rheological parameters affected the first-order morphology of the Western Alpin arc and its kinematics. The synthesis of these different approaches allows us to propose a new model explaining the kinematics and the mechanisms of formation of the Western Alps arc.</p>

Epilogue

2020 ◽  
pp. 321-324
Author(s):  
Federico De Romanis
Keyword(s):  
Red Sea ◽  
South India ◽  
Second Century ◽  
The South ◽  
South Indian ◽  
Import And Export ◽  
Complex Relationships ◽  
The Ganges ◽  
Precious Stones

The epilogue summarizes what the two texts of the Muziris papyrus tell us about the pepper and ivory production of the ancient Cēra kingdom, South Indian commercial connections with the Ganges Valley, the logistics of the Red Sea–Alexandria transports, the complex relationships between the South India traders and the contractors of the Red Sea tax, and the assessment and payment of the import and export customs duties. It also looks at what the two texts do not mention—the part of pearls and precious stones in the South India trade of the mid-second century ad. Furthermore, a speculative estimate of the commercial venture final balance is attempted.

Part II. The Perseia Fountain House

1953 ◽  
Vol 48 ◽  
pp. 19-29 ◽  
Author(s):  
A. J. B. Wace ◽  
M. R. Holland ◽  
M. S. F. Hood ◽  
A. G. Woodhead
Keyword(s):  
Soft Rock ◽  
The South ◽  
South Side ◽  
The North ◽  
North Side ◽  
Exact Position ◽  
Fountain House ◽  
East West

In 1892 Tsountas in the course of exploration on the top of the ridge between the ‘Tomb of Clytemnestra’ and the Lion Gate found a painted circular cap of poros (o·61 m. in diameter), which from the cuttings in it clearly seems to have been connected with some form of installation for water (Plate 14, b). It bears an inscription which as restored refers to Perseus. This inscribed cap Tsountas says he found among later ruins, but he did not specify the exact position. In 1922 therefore we investigated the ruins of apparently Hellenistic date which lie directly to the south of the modern carriage road on the top of the ridge to the north of the ‘Tomb of Clytemnestra’. A long terrace wall of ashlar work in poros was found running in an east-west direction along the south side of the modern road. In front of it, against its north side, lie two cement-lined basins (Plate 14, a). When these were first found and partially examined in 1922 it was suggested that they might be part of a gymnasium of Hellenistic date. At the same time a trial trench XIa by side of the steps was dug down about 0·25 m. into the soft rock below. In 1939 further trials were made behind (to the south of) the western part of the main terrace wall. Trench VII, which was dug to rock, was part of this work. At the same time the curved wall was exposed and part of the ‘votive deposit’ was excavated. The pottery then found, which was lost in the Nauplia Museum during the war, was of the same character as that found in 1952 and described below. In 1952, as part of the programme of exploration on the top and sides of the ridge which runs westward from the Lion Gate, it was decided to clear these ruins completely and study and plan them afresh.

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