Zones of Progressive Regional Metamorphism Across the Western Margin of the Mozambique Belt in Rhodesia and Mozambique

1966 ◽  
Vol 103 (3) ◽  
pp. 231-239 ◽  
Author(s):  
J. R. Vail
Keyword(s):  
Regional Metamorphism ◽  
Orogenic Belt ◽  
North East ◽  
The North ◽  
Mineral Assemblages ◽  
Mozambique Belt ◽  
Eastern Border ◽  
Southern Rhodesia ◽  
East West ◽  
Index Mineral

AbstractInvestigations of the sedimentary rocks of the Umkondo System have enabled six zones of eastwardly increasing metamorphic grade to be delineated on the basis of index mineral assemblages in pelite horizons.Chlorite, garnet (almandine), staurolite, kyanite, and sillimanite isograds have been recognized over a distance of 500 km. along the eastern border of Southern Rhodesia and are plotted on a map. More detailed reconnaissance work has been confined to the Barué highlands north-east of Inyanga. In addition, a “zone of intermediate isotopic age measurements” is proposed to the west of the lowermost chlorite zone. The isograds lie parallel to the structural edge of the north-south trending Mozambique orogenic belt and can be joined with those of similar metamorphic rocks in the east-west trending Zambesi orogenic belt, suggesting contemporaneity of the c. 500 m.y. regional tectono-thermal event in these two belts.

scholarly journals A Low frequency Southern Sky Survey Using the Mauritius Radio Telescope

2002 ◽  
Vol 199 ◽  
pp. 25-31
Author(s):  
N. Udaya Shankar
Keyword(s):  
Radio Telescope ◽  
Low Frequency ◽  
Fourier Synthesis ◽  
North East ◽  
The North ◽  
Sky Survey ◽  
Correlation Receiver ◽  
Complex Correlation ◽  
Right Ascension ◽  
East West

The Mauritius Radio Telescope (MRT) is a Fourier synthesis instrument which has been built to fill the gap in the availability of deep sky surveys at low radio frequencies in the southern hemisphere. It is situated in the north-east of Mauritius at a southern latitude of 20°.14 and an eastern longitude of 57°.73. The aim of the survey with the MRT is to contribute to the database of southern sky sources in the declination range −70° ≤ δ ≤ −10°, covering the entire 24 hours of right ascension, with a resolution of 4' × 4'.6sec(δ + 20.14°) and a point source sensitivity of 200 mJy (3σ level) at 151.5 MHz.MRT is a T-shaped non-coplanar array consisting of a 2048 m long East-West arm and a 880 m long South arm. In the East-West arm 1024 fixed helices are arranged in 32 groups and in the South arm 16 trolleys, with four helices on each, which move on a rail are used. A 512 channel, 2-bit 3-level complex correlation receiver is used to measure the visibility function. At least 60 days of observing are required for obtaining the visibilities up to the 880 m spacing. The calibrated visibilities are transformed taking care of the non-coplanarity of the array to produce an image of the area of the sky under observation.This paper will describe the telescope, the observations carried out so far, a few interesting aspects of imaging with this non-coplanar array and present results of a low resolution survey (13' × 18') covering roughly 12 hours of right ascension, and also present an image with a resolution of 4' × 4'.6sec(δ + 20.14°) made using the telescope.

The mineralogical composition of some Scottish soils

1925 ◽  
Vol 15 (3) ◽  
pp. 257-271 ◽  
Author(s):  
James Hendrick ◽  
George Newlands
Keyword(s):  
Mineralogical Composition ◽  
Fine Sand ◽  
Plant Food ◽  
Sand Fraction ◽  
Extensive Survey ◽  
North East ◽  
The North ◽  
Local Origin ◽  
East West ◽  
Made In

1. Previous investigations showed that certain Scottish soils were of glacial drift origin, that they were comparatively rich in unweathered silicates and therefore in reserves of plant-food, that they showed considerable variation in such silicates and were capable of classification accordingly. Some indication was also shown that the glacial drift, and hence the resulting soil, was sometimes of local origin, its character being determined by the underlying rock. In the present investigation a more extensive survey of Scottish soils has been made in order to discover to what extent these preliminary findings might be applicable generally.2. For this purpose soils have been collected from various localities in the north, north-east, west and south of Scotland, and have been analysed mechanically and the “fine sand” fraction examined mineralogically.

Un diatrème phréatomagmatique montérégien dans les Appalaches du Québec

1996 ◽  
Vol 33 (5) ◽  
pp. 649-655
Author(s):  
David Morin ◽  
Michel Jébrak ◽  
Robert Marquis
Keyword(s):  
Surface Water ◽  
Country Rock ◽  
Near Surface ◽  
Metasedimentary Rocks ◽  
North East ◽  
The North ◽  
Devonian Age ◽  
Fault Network ◽  
Alkaline Lamprophyres ◽  
East West

A subcircular positive magnetic anomaly and breccias affecting a basanite and its country-rock metasedimentary rocks reveal the presence of a diatreme with a diameter of approximately 420 m, at Eastman, in the Quebec Appalachians. The post-Middle Devonian age, the position in the line of the Monteregian plutons, and the basanite composition, which is comparable to that of the Cretaceous Monteregian alkaline lamprophyres, suggest that the diatreme is related to the Monteregian magmatism. It is located at the junction of two orthogonal tectonic corridors: the north-north-east Baie Verte – Brompton line and an east−west fault network along the prolongation of the Ottawa−Bonnechère Graben. These structures are zones of weakness that probably served as a conduit for the ascending magma and near-surface water to trigger phreatomagmatic eruptions.

Nature of the Quetico–Wabigoon boundary in the de Courcey – Smiley Lakes area, northwestern Ontario

1976 ◽  
Vol 13 (6) ◽  
pp. 737-748 ◽  
Author(s):  
Manfred M. Kehlenbeck
Keyword(s):  
Regional Metamorphism ◽  
Sedimentary Rocks ◽  
Metamorphic Grade ◽  
Boundary Zone ◽  
Present Level ◽  
Metasedimentary Rocks ◽  
The North ◽  
Northwestern Ontario ◽  
Multiple Phase ◽  
Mineral Assemblages

In the de Courcey – Smiley Lakes Area, the boundary between the Quetico and Wabigoon Belts is expressed by a sequence of pelitic to semi-pelitic schists and gneisses. At the present level of erosion, these metasedimentary rocks are in contact with granodioritic gneisses, granites, and pegmatites, which are exposed to the south.To the north of this area, regional metamorphism of volcanic and sedimentary rocks has resulted in greenschist facies assemblages, which characterize the Wabigoon Belt in general. In the boundary zone, the metamorphic grade increases southward toward de Courcey and Smiley Lakes.Formation of three distinct foliation surfaces was accompanied by syn-tectonic as well as post-tectonic recrystallization, producing polymetamorphic schists.In the boundary zone, mineral assemblages comprising andalusile, sillimanite, cordierite, garnet. biotite, and muscovite form a facies series of the Abukuma type.The boundary between the Quetico and Wabigoon Belts in this area is a complex zone in which rocks of both belts have been reconstituted by multiple-phase metamorphism and partial melting.

scholarly journals POTENSI PEMANFAATAN ATAP GEDUNG PUSAT PEMERINTAHAN KABUPATEN BADUNG UNTUK PLTS ROOFTOP

2018 ◽  
Vol 5 (2) ◽  
pp. 119
Author(s):  
I Dewa Gde Yaya Putra Pratama ◽  
I Nyoman Satya Kumara ◽  
I Nyoman Setiawan
Keyword(s):  
Total Energy ◽  
Electrical Power ◽  
Electrical Energy ◽  
South Side ◽  
North East ◽  
The North ◽  
North Side ◽  
Simulation Results ◽  
East West

In the RUPTL PT PLN Years 2017 untill 2026, the goverment aim to reach 5000 MW of PV plant potential in 2025. But, until November 2016, the number of PV plant in Indonesia is around 11 MW. To reach the 5000 MW target, many approach must be use. One of the approach is install PV plant on goverment buildings. Pusat Pemerintahan Kabupaten Badung (Puspem Badung) is a goverment buildings complex which located in Badung Regency, Bali is one of the goverment building that can be use for this approach. This paper aim to know the potency of electrical power dan electrical energy produced by Puspem Badung if the PV plant installed on the north, east, west, and south side of the roof. Electrical energy produced by PV plant is simulated by using System Advisor Model (SAM). From the simulation results, north side of the roof can produce energy of 1.847.361 kWh/year. From the analysis, the total energy that can be produced by PV plant is 6.169.092 kWh/year. This amount can supply Puspem Badung energy need by 124,72 %.

The Alteration of Detrital Minerals in the Mesozoic Rocks of Yorkshire

1941 ◽  
Vol 78 (2) ◽  
pp. 97-112 ◽  
Author(s):  
Frank Smithson
Keyword(s):  
Middle Jurassic ◽  
Heavy Mineral ◽  
Present Writer ◽  
North West ◽  
Detailed Survey ◽  
North East ◽  
The North ◽  
Mineral Assemblages

Dr. R. H. Rastall (1932) has described the petrography of the Middle Jurassic sandstones of Eskdale and shown that they possess a remarkably restricted suite of detrital minerals, having for example no garnet or staurolite, but containing much anatase and brookite, both apparently of authigenic origin. The present writer (1934) showed that in other parts of North-East Yorkshire beds of the same age contain relatively rich heavy mineral assemblages. After a more detailed survey the writer was able to show (1939c, Text-fig. 2) that the peculiar restricted assemblage was confined to a belt or elongated oval area—which can be roughly defined as occupying the north-west and northeast quarters of Sheet 43 (Geol. Survey “one-inch” map) and the north-east quarter of Sheet 44—and that as one passed outward from this area one met with increasingly richer assemblages at all horizons in the Middle Jurassic.1 This result, as well as the results of mapping certain other characteristics of the assemblage, led the writer to suggest that this belt, which coincides closely with the Cleveland axis, is a belt along which active decomposition and alteration has occurred in these deposits after they were laid down.

Nemesis: A Mycenaean settlement near the Menidi Tholos Tomb

1959 ◽  
Vol 53 ◽  
pp. 292-294
Author(s):  
R. Hope Simpson
Keyword(s):  
Ground Level ◽  
The West ◽  
North West ◽  
North East ◽  
The North ◽  
South West ◽  
Original Size ◽  
The Hill ◽  
East West ◽  
Ancient Remains

The site to be described lies on a low hill a little to the north of the small village or suburb of Nemesis, about 150 metres to the west of the main road from Patisia to Koukouvaounes, and 1 kilometre to east-south-east of the Mycenaean tholos tomb at Λυκὸτρυπα, which was excavated by the German Institute in 1879, and is usually called the Menidi Tomb. The site at Nemesis is visible from the tholos tomb, and is separated from it by a gentle valley through which run, in a southerly direction, two streams with steep banks. The eastern stream is the river Kephissos, whose name goes back at least as far as the classical period.The hill of Nemesis stands about 15 to 20 metres above the level of the surrounding land, and measures about 160 m. north-west to south-east × 120 m. north-east to south-west. The hill is an isolated outcrop of conglomerate rock, thinly covered with stony brown earth. It has been eroded over an area about 250 m. north-south × 50 m. east-west, so that its original size was considerably larger than at present, in all about 30,000 square metres. Mycenaean sherds were found over the whole of this area, though mainly in the eroded part, among the lumps of fallen earth and rock. Remains of rubble walling together with several Mycenaean sherds were found here, and also in the steep cliffs formed by the erosion on the west and south sides (this part of the hill has been undermined by recent excavation of the beds of grey clay, which here lie at between 2 and 3 metres below the original ground level). The ancient remains are particularly noticeable in the south-west angle of the cliffs (roughly in the centre of the part of the hill shown on Plate 71a), where there is a greater depth of earth above the rock than is visible elsewhere on the hill.

AGCHABADI DISTRICT OF THE NEW GARADOLAG VILLAGE ADMINISTRATIVE AREA EARTH COVER STUDY

2020 ◽  
pp. 121-129
Author(s):  
Aliyev Z.H.
Keyword(s):  
National Park ◽  
Salt Lake ◽  
River Flows ◽  
Average Temperature ◽  
North East ◽  
The North ◽  
North Eastern ◽  
Fruit Growing ◽  
Administrative Area ◽  
Eastern Border

It is known from the brief nature of the territory of the research district that the date of establishment of Agjabadi district - 08.08.1930 The territory - 1.76 thousand sq.m. km Population - 136.8 thousand people (January 1, 2020) Population density - 1 sq. km. km 78 people (January 1, 2020). Agjabedi district is located in Mil and Garabagh plains of Kur-Araz lowland. Agjabedi city and Sarvanlar, Kurds, Minakhorlu, Garavelli, Galabadin, Avshar, Muganli, Shahsevan, Koyuk, Tazakend, Khojavend, Salmanbeyli, Ashagi Avshar, Hindarkh, Imamgulu-beyli, Mirzahagverdili, Sarijali, Balakhrizli, Taynaq, Poinag , Sharafkhanli, Shotlanli, Shenlik, Husulu, Ranjbarlar, Boyat, Hajilar, Garakhanli, Hajibadalli, Pariogullar, Agabeyli, Garadolag, Mehrabli, Kabirli, Aran, Yeni Garadolag, Najaf-gulubeyli, Qiyameddinli, Shahsevan-Tazakand, Shahsevan-Tazakand, Includes Jafarbeyli and Yukhari Qiya-meddinli villages. The relief of the region is flat, gradually rising from the north-east to the south-west. The surface of the area is composed of continental-alluvial and marine sediments of the Anthropogenic system. There is a clay deposit. The climate is temperate hot, dry subtropical. The average temperature is 1.2-1.7 ° C in January and 25-26 ° C in July. Annual precipitation is 300-500 mm. The river network is sparse. The Kura River flows along the north-eastern border, and the Gargar River flows through the central part. The Upper Karabakh canal passes through the region. There is a salt lake in the area. Gray-meadow, gray, meadow-gray soils are widespread. In the central part, saline and saline soils are found. The plants are of steppe and semi-desert type. There are bushes and sparse Tugay forests on the banks of the Kura River. Animals: gazelle, wolf, wild boar, jackal, fox, swamp beaver, badger, gray rabbit, Asia Minor sand mouse, etc. Birds: turkey, pigeon, black grouse, pheasant, etc. Aggol National Park is locat-ed in Agjabadi district. 15 species of animals, 20 species of fish and 40 species of plants have been recorded here. Agjabadi is mainly an agricultural region. Fruit growing, cotton growing, grain growing, silkworm breeding, ani-mal husbandry, etc. developed.

GOOD NEWS: PARTITIONING A SIMPLE POLYGON BY COMPASS DIRECTIONS

2004 ◽  
Vol 14 (04n05) ◽  
pp. 233-259 ◽  
Author(s):  
MARC VAN KREVELD ◽  
IRIS REINBACHER
Keyword(s):  
Information Retrieval ◽  
Simple Polygon ◽  
Geographic Information ◽  
Efficient Algorithms ◽  
Good News ◽  
Geographic Information Retrieval ◽  
Geometric Problems ◽  
North East ◽  
The North ◽  
East West

Motivated by geographic information retrieval, we study the problem of partitioning a simple polygon into four parts that can be considered as the North, East, West, and South. We list criteria for such partitionings, propose formalizations into geometric problems, and give efficient algorithms. An implementation and tests on country outlines show the results for three different partitionings.

scholarly journals Use of Topographic Map Evidence From Drainage Divides Surrounding Wyoming’s Great Divide Basin to Compare Two Fundamentally Different Regional Geomorphology Paradigms

2020 ◽  
Vol 9 (1) ◽  
pp. 45 ◽  
Author(s):  
Eric Clausen
Keyword(s):  
Scientific Discipline ◽  
Mountain Range ◽  
Topographic Map ◽  
New Paradigm ◽  
Geologic History ◽  
North East ◽  
The North ◽  
Continental Divide ◽  
Great Divide ◽  
East West

Divide crossings (or low points or gaps) notched into the North American east-west continental divide segments completely encircling Wyoming’s Great Divide Basin interior drainage region (as observed on detailed topographic maps) are used to compare the commonly accepted regional geomorphology paradigm with a fundamentally different and new regional geomorphology paradigm. Paradigms are sets of rules governing how a scientific discipline conducts its research and are judged on their ability to explain observed evidence. Published literature is used to contrast an accepted paradigm interpretation that east-oriented drainage previously flowed across what is now the Great Divide Basin with the new paradigm basic requirement that mountain range and continental divide uplift occurred while immense south-oriented floods flowed across them. Numerous divide crossings are notched into the continental divide segments now completely encircling the relatively flat-floored Great Divide Basin interior drainage area and divide crossings observed along each of the Great Divide Basin’s north, east, south, and west margins are described and interpreted first from the accepted paradigm perspective (using published literature interpretations to the extent possible) and second from the new paradigm perspective. The published literature does not mention most of the described divide crossings, much less provide explanations for their origins, perhaps because the accepted paradigm cannot satisfactorily explain those origins. In contrast the new paradigm successfully explains most if not all of the described (and observed, but undescribed) divide crossings, although the new paradigm requires a completely different middle and late Cenozoic regional geologic history than what most published regional geology literature describes.

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