A discussion on the structure and evolution of the Red Sea and the nature of the Red Sea, Gulf of Aden and Ethiopia rift junction - Introductory remarks

The Red Sea Discussion Meeting originated in the desire of the other organizers to bring together as many as possible of the earth scientists who have been working recently in that area to examine the latest evidence and ideas on its structure and origin, to see how they accord with modern continental and sea-floor spreading concepts. The Red Sea, Gulf of Aden and Afar crustal depressions, now known to be continuous with the extension of the world ocean rift system, have been claimed as a manifestation of crustal separation, but some Earth scientists still consider that the evidence can be explained by less drastic crustal rifting. Definite solutions to the many outstanding problems were not expected but discussions would clearly assist further researches.

1990 ◽  
Vol 127 (4) ◽  
pp. 309-318 ◽  
Author(s):  
D. I. J. Mallick ◽  
I. G. Gass ◽  
K. G. Cox ◽  
B. V. W. De Vries ◽  
A. G. Tindle

AbstractPerim Island is an eroded fragment of the southwest flank of a late Miocene (10.5 ± 1.0 Ma) volcano whose centre lay on the southwesternmost tip of Arabia. The volcano is the westernmost of the E–W line of six central vent volcanoes (the Aden Line) that extends 200 km along the south coast of Arabia from Perim to Aden. Major oxide and trace element abundances are given for 35 Perim specimens and these show that the volcano has within-plate trace element characteristics and consists of a petrographically and geochemically simple suite of alumina-poor olivine basalts, andesites, and transitional andesite–trachyandesites. Six specimens, however, are markedly enriched in Al2O3 and CaO, and contain abundant (20–30 mode %) highly calcic (An77–83) plagioclase phenocrysts. Geochemical modelling suggests that the main Perim volcanic sequence was produced by the fractional crystallization (o1 + cpx + Ti-mt + plag) of a silica saturated (SiO2 c. 45%) basic melt. The high A1, high Ca, magmas appear to be mixing products of plagioclase-enriched basic magmas with more evolved melts. Perim is the oldest volcano of the Aden line, which becomes increasingly younger and alkalic eastward. It is suggested that the volcanism is related to an eastwards-propagating rift produced before the most recent stage of sea-floor spreading in the Gulf of Aden (4.5 Ma–present).


The results of an intensive seismic survey in the Red Sea are presented. Analysis of twenty seismic refraction lines leaves no doubt that much more than just the central trough of the Red Sea is underlain by material with a seismic velocity which is characteristic of oceans. In addition, up to 5 km of what we interpret as evaporites were regularly found. The suggestion that the Red Sea crust could be oceanic in character over the major part of its width is examined in conjunction with magnetic and gravity data. We conclude that there is no evidence against sea floor spreading on a substantial scale in the Miocene. The implications of this in terms of neighbouring features is briefly discussed.


Resonance ◽  
2021 ◽  
Vol 2 (2) ◽  
pp. 182-191
Author(s):  
D. Michael Cheers

This essay is inspired by the words of Pulitzer Prize–winning Chicago Sun Times photographer John White, who once told me to “listen for the pictures.” His message rang clear but never more so than when in 1990 we were covering the release of Nelson Mandela in Cape Town, South Africa. The Cape Town scene was alive and filled with so much vibrance. I was keenly aware that I must not just look, but I must listen, and use all my God-given senses to take it in. I can only describe the moment I started listening to the layer of sound, which was my own clicking camera superimposed on the chorus of sounds that surrounded me as both meta and sonorific. There was a certain rhythm to the sensation I felt in being one with my camera. It transported me to a wonderful place in time where visuals and cadences danced together. I realized there was alchemy in this and in all the other moments and locations I had spent behind a camera developing and exercising that “inner ear” my ancestors, some gone, like Gordon Parks, but others here, like White, taught me to revere. This essay is a snapshot of some of those moments—a proof sheet, if you will—from a life that began, as did the civil rights era, with instances of terror and triumph. This essay chronicles my journey as a young photographer and the many influences that shaped my creative process and eventually my worldview. This essay is an invitation to travel with me through time and see life as my camera and I witnessed it, and to hear and sense the world as I do.


Al-MAJAALIS ◽  
2018 ◽  
Vol 6 (1) ◽  
pp. 147-179
Author(s):  
Ali Musri Semjan Putra

Among the proofs of the greatness of God's power in the millennium is the emergence of various kinds of information media that are very helpful for ease in various matters. The convenience covers various fields of affairs, not just in the form of sharing information but has penetrated into the fields of business, education, da'wah and so on.Besides the many positive sides of social media, on the other hand social media is also a vehicle for various negative actions, such as hoaxes, fighting, sex trafficking, drug sales and so on. So this study tries to examine the nabawi hadiths relating to things that must be heeded in social media, specifically those related to hoaxes, with the induction approach using qualitative analysis. The purpose of the research is to provide insight to the community in using social media so that there is no violation of religious teachings or legislation when integrating on social media. As well as being a wrong solution in tackling and minimizing various forms of irregularities and violations that occur in the community in social media, both offenders in the form of crimes of intimidation, provocation, fraud, counterfeiting and so on, are spurred from hoax news.The conclusion of this study is that making or spreading hoaxes is an act that is strictly prohibited and prohibited in the nabawi hadiths which are the second source of law in Islamic law after the noble Qur'an. The culprit has the right to be punished in the world in a criminal manner or get a severe punishment in the hereafter, according to the effects and headlines of the lies he did.


Author(s):  
Reinhard Bork ◽  
Renato Mangano

This chapter deals with European cross-border issues concerning groups of companies. This chapter, after outlining the difficulties encountered throughout the world in defining and regulating the group, focuses on the specific policy choices endorsed by the EIR, which clearly does not lay down any form of substantive consolidation. Instead, the EIR, on the one hand, seems to permit the ‘one group—one COMI’ rule, even to a limited extent, and, on the other hand, provides for two different regulatory devices of procedural consolidation, one based on the duties of ‘cooperation and communication’ and the other on a system of ‘coordination’ to be set up between the many proceedings affecting companies belonging to the same group.


An attempt is made to fit available petrochemical data on oceanic volcanic rocks into the structural model for the ocean basins presented by the plate tectonic theory. It is suggested that there are three major volcanic regimes: (i) the low-potassic olivine tholeiite association of the axial zones of the oceanic ridges where magmatic liquids are generated at low pressures high in the mantle, (ii) the alkalic (Na > K) associations along linear fractures where liquids generated at greater depth gain easy egress to the surface, (iii) those alkalic associations, rich in incompatible elements, of island groups, remote from fracture zones, where magmas created at depth proceed slowly to the surface and in consequence suffer intense fractionation. There are certain discrepancies in this pattern, notably that there is no apparent relation between rate of sea-floor spreading and degree of over-saturation of the axial zone basalts and that certain areas, such as Iceland, are characterized by excess volcanism. Explanation of these anomalies is sought by examining an oceanic area in an early stage of development—the Red Sea. It is tentatively suggested that the initial split of a contiguous continent might be brought about by the linking of profound fractures, caused by domal uplift related to rising isolated lithothermal systems, and that the present anomalies in oceanic volcanism may reflect the variation in rate of thermal convection within the original isolated lithothermal plumes.


2004 ◽  
Vol 31 ◽  
pp. 135-139
Author(s):  
C. Warkup

The title of this paper, as proposed by the meeting organisers, implies that Europe is different when it comes to biotechnology. In the early years of the 21st Century, even an impartial observer would agree that Europe differs from most of the rest of the world in its attitudes to at least one biotechnology – Genetically Modified (GM) crops. On the other hand, parts of Europe are seen as relatively enthusiastic about applications of biotechnology in human medicine. Take for instance, the UK's stance on research with human stem cells. Do these differences reflect permanent differences or merely a more cautious approach in Europe to the adoption of biotechnology in food production? Does this matter to pig producers?This paper seeks to give a broad and shallow overview of the opportunities for developments in biotechnology to impact on pig production. It will consider which of the many potential new technologies, if they were available now, might be acceptable in Europe and what might be the consequences of failure to access technologies that others exploit.


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