Neotectonics in Hydrocarbon Transportation Lines Corridors: The Need of a Detailed Study

2013 ◽  
Author(s):  
José Vicente Amórtegui
Keyword(s):  
Past Century ◽  
Mountain Range ◽  
South American ◽  
South American Plate ◽  
Mountain Ranges ◽  
Oil Pipeline ◽  
The North ◽  
Geological Processes ◽  
Hydrocarbon Transport ◽  
North Western

The Colombian pipeline network is exposed to the permanent activity of geological processes that happen in the country, due to the location of the country in the north-western corner of the South American plate — where it is interrelated to the Nazca and Caribbean plates —, the Andean zone is subject to compression strains that cause the uplifting of the mountain ranges and with it their slopes, which eases the instability processes. On the other hand, since the country is located in the inter-tropic zone of the planet, where the rock deterioration processes are harsher, landslides are more frequent, this together with the condition of strains, makes instability something fairly common. Evidence on pipelines for hydrocarbon transport is obtained from the fault activity, like this: The Santiago–El Porvenir oil pipeline, that rises from the plains to the mountain range, in December of 1991 a sudden linear landslide of the pipe was evidenced in the Santiago field (flat zone in the plains, south of Maní, Casanare), the position of the topographic control markers of the line was verified and a terrain shortening of 22.5cm was found in the markers located both sides of the Yopal fault, for this reason the pipe had moved from the area into the launching trap of Santiago, located 60km away from the trace of the fault. In the Medellín–Cartago pipeline, in the crossing above the Cauca river, in the area of La Felisa, there is a 2.57m misalignment, in relation to the construction location, where the towers were aligned with the direction of the pipe, around 25 years ago. Nowadays the curve in the pipe suspended from the bridge cables can be observed, which, given the length of the bridge of around 200m doesn’t affect the mechanical conditions of the pipe. Along the Cauca river passes one of the geological faults of the Romeral system. (figure 5). Due to the tracing of the initial pipes of the Cusiana Field, in the late 90s of the past century, a shortening of more than 2m of distance was detected between the geodesic spots of the National Geodesic Network, Taura and Mena, that are found beside the Guaicaramo faults system, these spots were built in the early 50s and located with first order geodesic precision procedures.

Study for the Determination of Seismic Hazard for the Ocensa Oil Pipeline

2015 ◽  
Author(s):  
Julian Javier Corrales ◽  
Hugo Alberto García ◽  
Mauricio Gallego Silva ◽  
Elkin Gerardo Avila
Keyword(s):  
Seismic Hazard ◽  
Oil Fields ◽  
Mountain Range ◽  
South American ◽  
Nazca Plate ◽  
South American Plate ◽  
Oil Pipeline ◽  
The Andes ◽  
The Caribbean

The Andes mountain range crosses South America from South to North, is created by the subduction of the Nazca plate beneath the South American plate, this situation generates a high seismic and volcanic activity which have been decisive in shaping the relief of the continent. The OCENSA pipeline crosses the Andes Mountains on its way to transport crude from the oil fields of the eastern plains to the port of Coveñas on the Caribbean Sea. Therefore for the integrity department of Ocensa the assessment of seismic hazard is among one of its priorities. In this paper the results of the study in Ocensa for determination of seismic hazard for the pipeline and its major facilities are presented.

Geodynamic study of the north of the Andes block (Colombia, Panama, Ecuador and Venezuela) through gnss-gps: models of displacements, models of deformation and definition of local and regional geodynamic structures.

2020 ◽  
Author(s):  
Berrocoso Manuel ◽  
Del Valle Arroyo Pablo Emilio ◽  
Colorado Jaramillo David Julián ◽  
Gárate Jorge ◽  
Fernández-Ros Alberto ◽  
...  
Keyword(s):  
South America ◽  
Seismic Activity ◽  
Great Part ◽  
Velocity Model ◽  
South American ◽  
The South ◽  
South American Plate ◽  
Northern Andes ◽  
Velocity Models ◽  
The North

<p>The northwest of South America is conformed by the territories of Ecuador, Colombia and Venezuela. Great part of these territories make up the Northern Andes Block (BAN). The tectonic and volcanic activity in the northwest of South America is directly related to the interaction of the South American plate, and the Nazca and Caribbean plates, with the Maracaibo and Panama-Chocó micro plates. The high seismic activity and the high magnitude of the recorded earthquakes make any study necessary to define this complex geodynamic region more precisely. This work presents the velocity models obtained through GNSS-GPS observations obtained in public continuous monitoring stations in the region. The observations of the Magna-eco network (Agustín Codazzi Geographic Institute) are integrated with models already obtained by other authors from the observations of the GEORED network (Colombian Geological Service). The observations have been processed using Bernese software v.52 using the PPP technique; obtaining topocentric time series. To obtain the speeds, a process of filtering and adjustment of the topocentric series has been carried out. Based on this velocity model, regional structures have been defined within the Northern Andes Block through a differentiation process based on the corresponding speeds of the South American, Nazca and Caribbean tectonic plates. Local geodynamic structures within the BAN itself have been established through cluster analysis based on both the direction and the magnitude of each of the vectors obtained. Finally, these structures have been correlated with the most significant geodynamic elements (fractures, faults, subduction processes, etc.) and with the associated seismic activity.</p>

The Relations of Great Britain with Guiana

1923 ◽  
Vol 6 ◽  
pp. 1-21
Author(s):  
G. C. Edmundson
Keyword(s):  
Sixteenth Century ◽  
South American ◽  
American Continent ◽  
The South ◽  
Mountain Ranges ◽  
North East ◽  
The North ◽  
Terra Incognita ◽  
Rio Negro ◽  
South American Continent

Guiana, in the larger sense of the word, is that portion of the South American continent bounded on the north and north-east by the ocean; on the south, south-west and west by the river Amazon, its tributary the Rio Negro, the river Cassiquiare, which unites the river Negro to the river Orinoco, and by the river Orinoco itself. It is thus an island; as there is no break in the water-line that surrounds it. This larger Guiana is, however, divided into two distinct portions, separated from one another by a series of mountain ranges stretching from the Orinoco to the river Oyapok. That portion, which lies between these mountain ranges and the sea, differs entirely in character from the Guiana of the watersheds of the Amazon and Orinoco. It consists of a succession of tablelands, rising one above the other, and is watered by a large number of nearly parallel rivers, whose cataracts and frequent rapids render navigation into the interior, except by canoes, practically impossible. In this Guiana, the Guiana with which this paper deals, there have never been any Spanish or Portuguese settlements. At the end of the sixteenth century no attempt had been made by the Spaniards to cross the river Orinoco, or by the Portuguese, to reach the mouth of the river Amazon. Between these two rivers lay a terra incognita, of which nothing was known, until the publication of Ralegh's Discoverie of Guiana in 1595.

scholarly journals GEOLOGICAL-GEOMORPHOLOGICAL ANALYSIS OF NATIONAL NATURAL PARKS OF THE NORTH-WESTERN PART OF THE UKRAINIAN CARPATHIANS

2021 ◽  
pp. 184-207
Author(s):  
Yaroslav Kravchuk ◽  
Vitaliy Brusak
Keyword(s):  
National Parks ◽  
Geological Structure ◽  
Mountain Ranges ◽  
The North ◽  
Natural Park ◽  
Natural Parks ◽  
Different Ages ◽  
Gravitational Processes ◽  
River Valleys ◽  
North Western

In the stydy an analysis of the geological structure and relief of Uzhansky, “Skolivsky Beskydy”, and “Boykivshchyna” national natural parks (NNP), located in the north-western part of the Ukrainian Carpathians, is presented. Uzhansky NNP is located within the Polonynsko-Chornohirska and Vododilno-Verkhovyna geomorphological regions, “Skolivski Beskydy” NNP is situated in the Skibovy Carpathians, and the newly created “Boykivshchyna” NNP is located within the Vododilno-Verkhovyna and Skybovi Carpathians. The analysis of the morphostructure and morphosculpture of national parks is carried out taking into account the longitudinal (N-W–S-E) and transverse divisions of the Ukrainian Carpathians. The longitudinal division is associated with higher morphostructures of higher orders – the second and third, with the transverse is associated with the fourth and fifth morphostructures. In the analysis of morphosculpture of national parks, the types which are characteristic of the Carpathian Flysch belt are allocated. All mountain ranges and ridges are characterized by an asymmetrical structure – steep northeastern slopes and declivous southwestern slopes. The relic morphosculpture is represented by: 1) fragments of denudation surfaces of different ages such as Beskid, Pidbeskid, and riparian; 2) extra glacial and firn glaciations; 3) areas of ancient longitudinal valleys. Inherited morphosculpture is represented by river valleys with a complex of terraces of different ages. Modern morphodynamic processes represent by height (tier) differentiation. In the tiers of strongly dissected mid-mountain and low-mountain relief, the processes of planar erosion, deflux, and linear erosion play an important role in the modeling of the relief. The lower tier of the terraced and non-terraced bottoms of the valleys are associated with the processes of leaching and erosion as well as a significant accumulation of erosion products and mudflows. Among gravitational processes and block motions, stabilized and active displacements are the most recorded. Keywords: National natural park; Ukrainian Carpathians; relief; morphostructure; morphosculpture.

scholarly journals The Synopsis of the Genus Phleum L. (Poaceae) in Flora of The Kyrgyz Republic

2018 ◽  
pp. 17-24
Author(s):  
Adilet Usupbaev
Keyword(s):  
Cultural Landscape ◽  
Phleum Pratense ◽  
Tien Shan ◽  
Mountain Range ◽  
Kyrgyz Republic ◽  
Mountain Ranges ◽  
The North ◽  
Mountain System ◽  
Identification Of Species ◽  
Phleum Pratense L

On the base of investigation of material kept in Herbarium of flora laboratory (Institute for Biology and Pedology, National Aсademy of Sciences (FRU), a synopsis of the genus Phleum L. (Poaceae) in flora of Kyrgyz Republic with a key for identification of species and short citats is presented. Six species are recognized in Kyrgyz Republic (Phleum phleoides H. Karst., Phleum himalaicum Mez, Phleum paniculatum Huds., Phleum pratense L., Phleum roshevitzii Pavlov, Phleum alpinum L.). Phleumroshevitzii Pavlov newly reported for Kyrgyz Republic (Issyk-Kul Lake depression, Northern Kyrgyzstan). Maps of distribution for species growing in Kyrgyz Republic (Laskov GA., Sultanova BA., 2011) and list of studied specimens are provided. NK - Northern Kyrgyzstan (Chu Valley with adjacent northern macro-slope of Alexander Mountain Range, and the basin of Chon-Kemin River); IK - Issyk-Kul Lake depression (including northern macro-slope of TerskeiAla-Too Mountain Range, southern slope of KungeiAla-Too Mountain Range, basins of Tyup, Jergalan, and Karkyra rivers); CT - Central Tien Shan (basin of the Sary-Dzhaz River); WT - esternTien Shan (Talas and Chatkal valleys together with slopes of adjacent mountain ranges, and Ketmen-Tyube Valley); F - Cis-Ferghanian Kyrgyzstan (edges of the Fergana Valley, with adjacent macro-slopes of Chatkal Mountain Range, Fergana Mountain Range, Turkestan Mountain range, and Alai Mountain System); IT - Inner Tien Shan (the area bounded in the north by Kyrgyz Mt. Ridge, in the southwest by Fergana Mountain Range, and in the south-east by Kokshaal-Too Mountain System); А - Alai Valley (including southern macro-slope of Alai Mts. and northern macro-slope of Trans-Alai Mt. Range); EK - Entire territory of Kyrgyzstan (i. e. species is registered in all of abovementioned regions). Kyrgyz Republic is located in the centre of Eurasia. The distance to an Indian Ocean is about 3 000 km. The total square is about 198,500 km2. Altitudes are from 410 to 7 439 m above sea level. Over 90 % of the territory is elevated above 1 500 m. About 40 % of nearly uninhabitable: glaciers, permanent snow, rocks, scree, alpine desert, etc. Ca. 7 % of territory is occupied by the cultural landscape: fields, settlements, roads, and industry (Atlas…1987). Only the main literature sources are cited for species: “Flora URSS” (Ovczinnikov, 1934), “Flora of Kirghiz SSR”(Nikitina, 1950), “Conspectus florae AsiaeMediae” (Gamajunova, 1968), and also the monograph of Tzvelev NN. “Grasses of URSS” (Tzvelev, 1976). The article contains 1 Figures, 1 key for identification of species, and 11 References.

Uplift history of the Western Ecuadorian Andes: new constraints from low-temperature thermochronology

2020 ◽  
Author(s):  
Audrey Margirier ◽  
Peter Reiners ◽  
Ismael Casado ◽  
Stuart Thomson ◽  
Alexandra Alvarado ◽  
...  
Keyword(s):  
Strike Slip ◽  
South American ◽  
South American Plate ◽  
Ridge Subduction ◽  
The North ◽  
Western Cordillera ◽  
Deformational History ◽  
History Of ◽  
Long Term Impact

<p>The Cenozoic growth of the Ecuadorian Andes has been strongly influenced by the compressional reactivation of inherited crustal anisotropies, strike-slip faulting and uplift, and the erosional effects of a wet tropical climate superposed on the deforming orogen. Some authors have linked uplift in the Western Cordillera to the interaction between the South American Plate and the subduction of the oceanic Carnegie Ridge. However, recent studies have alternatively suggested that the tectonic evolution of a northward-escaping crustal sliver in western Ecuador along the Pallatanga strike-slip zone may equally well explain mountain building and topographic growth in this region. While the importance of the Pallatanga Fault has been recognized in the context of seismic hazards, its long-term impact on the development of topography and relief has not been explored in detail. To evaluate the possible roles of oceanic ridge subduction and/or strike-slip motion in prompting the growth of the Western Cordillera, we present new thermochronological data to constrain the deformational history of the Western Cordillera at different latitudes. We focus on two sites in the vicinity of the Pallatanga strike-slip fault (3°S and 1°30’S) and a location farther to the north (0°30’N). Our apatite and zircon (U-Th-Sm)/He dates range from 26.0 ± 0.4 Ma to 3.9 ± 0.1 Ma and from 23.7 ± 0.3 to 5.9 ± 0.1 Ma, respectively. The three sampled sites record a clear age-elevation relationship. The inverse modeling of apatite and zircon (U-Th-Sm)/He dates and upcoming apatite fission-track data is expected to provide new constraints on the recent uplift and exhumation history of the Western Ecuadorian Andes and thus furnish information on the paleo-geographical evolution of the northern Andes.</p>

Frozen Rivers and Fault Lines

2013 ◽  
Author(s):  
Mike Searle
Keyword(s):  
Western Himalaya ◽  
Mountain Range ◽  
The Road ◽  
North East ◽  
The North ◽  
Golden Eagles ◽  
Trade Route ◽  
Winter Time ◽  
The Himalaya ◽  
North Western

After seven summer field seasons working in the north-western Himalaya in India, I had heard of a winter trade route that must rank as one of the most outlandish journeys in the Himalaya. The largely Buddhist Kingdoms of Ladakh and Zanskar are high, arid, mountainous lands to the north of the Greater Himalayan Range and in the rain shadow of the summer monsoon. Whereas the southern slopes of the Himalaya range from dense sub-tropical jungles and bamboo forests to rhododendron woods and magnificent alpine pastures carpeted in spring flowers, the barren icy lands to the north are the realm of the snow leopard, the yak, and the golden eagles and lammergeier vultures that soar overhead. The Zanskar Valley lies immediately north-east of the 6–7,000-metre-high peaks of the Himalayan crest and has about thirty permanent settlements, including about ten Buddhist monasteries. I had seen the Zanskar Ranges from the summit of White Sail in Kulu and later spent four summer seasons mapping the geology along the main trekking routes. In summer, trekking routes cross the Himalaya westwards to Kashmir, southwards to Himachal Pradesh, and northwards to Leh, the ancient capital of Ladakh. Winter snows close the Zanskar Valley from the outside world for up to six months a year when temperatures plummet to minus 38oC. Central Zanskar is a large blank on the map, virtually inaccessible, with steepsided jagged limestone mountains and deep canyons. The Zanskar River carves a fantastic gorge through this mountain range and for only a few weeks in the middle of winter the river freezes. The Chaddur, the walk along the frozen Zanskar River, takes about ten to twelve days from Zanskar to the Indus Valley and, in winter time, was the only way in or out before the road to Kargil was constructed. I mentioned this winter trek to Ben Stephenson during our summer fieldwork in Kishtwar and he stopped suddenly, turned around, and said ‘Mike we just have to do this trek!’ So the idea of a winter journey into Zanskar was born, and four of us set off from Oxford in January 1995.

Quantifying the contribution of Tibetan Plateau (TP) uplift and CO2 decrease for late Eocene and present day climate with emphasis on Meridional Ocean Circulation.

2020 ◽  
Author(s):  
Gilles Ramstein ◽  
Baohuang Su ◽  
Dabang Jiang ◽  
Ran Zhang ◽  
Pierre Sepulchre
Keyword(s):  
Tibetan Plateau ◽  
Ocean Circulation ◽  
Late Eocene ◽  
Ocean Dynamics ◽  
Mountain Range ◽  
The Tibetan Plateau ◽  
Mountain Ranges ◽  
The North ◽  
Low Co2 ◽  
Realistic Description

<p>Since late Eocene (40 Ma), atmospheric CO2 drastically decreased from 4 to 1 PAL.  During this period, two major geological events occurred over Asia: the India/Asia collision producing the uplift of large mountain ranges and the shrinkage of the Paratethys (G. Ramstein et al., Nature, 1997; F. Fluteau et la., JGR, 1999). Most modeling studies focused first on the sensitivity of AGCMs to the Tibetan plateau elevation through simple experiments; then new simulations accounting for more realistic description of paleogeographic reconstructions have been published. Indeed, progress has been done concerning both: paratethys evolution (Z. Zhang et al., PAL PAL PAL, 2007), chronology of uplifts of different mountain ranges (R. Zhang et al., JGR, 2017) and large TP northern shift (R. Zhang et al., EPSL, 2018), but again these experiments focused mostly on atmosphere circulation and hydrologic pattern (monsoon evolution) not specifically on their impacts on ocean dynamics.</p><p>Therefore, this study aims to investigate the role of TP uplift on Northern hemisphere ocean circulation through long runs of coupled ocean atmosphere model to analyze its impact not only on atmosphere but also on ocean dynamics. We provided a series of sensitivity simulations disentangling the two different factors, pCO2 decrease and TP uplift. These simulations allow analyzing the response to TP uplift in a warm high CO2 world as Eocene and in a cold low CO2 world as Quaternary (B. Su et al., CP, 2018).</p><p>We describe how the TP uplift through changes of atmosphere (surface winds and planetary waves) and hydrology (runoff and precipitation/evaporation patterns) modified the meridional circulation in the North Atlantic and Pacific basins with emphasize on the causes of the two different basins sensitivity to this major mountain range uplift in both contexts.</p>

Muses on Pindos

1961 ◽  
Vol 8 (1) ◽  
pp. 22-26 ◽  
Author(s):  
A. D. Fitton Brown
Keyword(s):  
World War Ii ◽  
Faerie Queene ◽  
Western Boundary ◽  
Mountain Range ◽  
World War ◽  
The North ◽  
Dark Ages ◽  
Valerius Flaccus ◽  
The Town ◽  
North Western

Pindos, the mountain range between Thessaly and Epeiros, is not without renown. It appears first in Pindar (Pythian ix. 15), where in its ‘storied dells’ Kreousa gave birth to Hypseus by the love of the river-god Peneios. It, or more likely the town of the same name in Doris, was known to Pindar (Pythian i. 66) as the home of the Dorians, and it appears in Aeschylus and Sophokles—in the former (Supp. 257) as the north-western boundary of Pelasgos' realm, in the latter (Fr. 249) as the source of the Acheloos. Kallimachos, Theokritos, and Orpheus refer to it, and in Latin it is at least as old as Virgil. We find it in Horace, Propertius, Ovid, Lucan, Silius, and Valerius Flaccus,3 and in the course of antiquity it acquired a reputation as a lofty, wooded mountain which persists in Claudian and through the Dark Ages. Once more it is the setting for an amour of Apollo; Paion's mother, Liagore, receives leech-craft as the price of her favours (Faerie Queene, iii. 4. 41); and the same Spenser praised the whiteness of its snow (Prothalamian, 40). Wordsworth, as he wondered at the torrent at the Devil's Bridge, asked:‘Hath not Pindus fed thee, where the band Of Patriots scoop their freedom out, with hand Desperate as thine?’and it was about the Pindos range that, in 1940, another band of patriots repelled the Italian invasion of their country and won the first Allied victory of World War II.

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