The world-wide oceanic rise-ridge system

1965 ◽  
Vol 258 (1088) ◽  
pp. 109-122 ◽  
Keyword(s):  
Heat Flow ◽  
World Wide ◽  
High Heat ◽  
The Other ◽  
Normal Faults ◽  
Normal Faulting ◽  
High Heat Flow ◽  
Flood Basalts ◽  
The World ◽  
Ridge System

About half the length of the * oceanic ’ rise-ridge system is centred in ocean basins. On the other hand, almost the whole system is approximately disposed in circles around continental shields. Exceptional heating of the system is indicated by high heat flow and the extrusion of extraordinary volumes of flood basalts. The concentration of volcanoes, however, is little greater than normal for ocean basins. Longitudinal normal faulting and transverse wrench faulting are characteristic of the system. Both types formed early in the life of the system and are still active. Wrench faults offset belts of normal faulting and the crests of rises and ridges in many places but are not themselves known to be offset by normal faults. The ancient Darwin Rise has subsided in the southwestern Pacific. Its history differs in some respects from other rises although it too was heated and faulted. A hypothesis of origin of the system is briefly discussed.

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 - A review of Red Sea heat flow

1970 ◽  
Vol 267 (1181) ◽  
pp. 191-203 ◽  
Keyword(s):  
Heat Flow ◽  
Red Sea ◽  
High Heat ◽  
Temperature Measurements ◽  
High Heat Flow ◽  
Flow Measurements ◽  
The World ◽  
Brine Pools ◽  
Deep Exploration ◽  
Made In

There are now twelve heat flow measurements in the Red Sea made with heat flow probes from survey ships and several sets of temperature measurements made in deep exploration boreholes. The oceanic measurements are in water depths ranging from 0.94 to 2.70 km and all but one of these measurements give values significantly higher than the world mode of 46 mW m -2 (1.1 ). They include the world record high oceanic measurement of more than 3307 mW m -2 (79.0) in the neighbourhood of the hot brine pools. These measurements show that the deep axial trough of the Red Sea is associated with high heat flow, the values being similar to those found in the mid-Indian Ocean rift, the mid-Atlantic rift and over the crest of the East Pacific rise. It is of considerable interest to see if there is also high heat flow over the Red Sea margins and the main purpose of this paper is to examine temperature data from deep exploration boreholes. The boreholes are drilled mainly in rock salt, sandstones and shales. A discussion is given of the thermal conductivities assumed for these rocks. The boreholes have depths of up to 4 km and in some cases the temperature measurements enable an estimate to be made of the heat flow. These are also found to be high. The significance of the high heat flow to ideas concerning the structure and evolution of the Red Sea is discussed.

Patterns of Searching for Information on the World Wide Web: A Pilot Study

2003 ◽  
Vol 92 (3_suppl) ◽  
pp. 1091-1096 ◽  
Author(s):  
Nobuhiko Fujihara ◽  
Asako Miura
Keyword(s):  
World Wide Web ◽  
Undergraduate Students ◽  
Search Engines ◽  
World Wide ◽  
Information Sources ◽  
Task Type ◽  
The Other ◽  
The World ◽  
Selection Of ◽  
Search Domain

The influences of task type on search of the World Wide Web using search engines without limitation of search domain were investigated. 9 graduate and undergraduate students studying psychology (1 woman and 8 men, M age = 25.0 yr., SD = 2.1) participated. Their performance to manipulate the search engines on a closed task with only one answer were compared with their performance on an open task with several possible answers. Analysis showed that the number of actions was larger for the closed task ( M = 91) than for the open task ( M = 46.1). Behaviors such as selection of keywords (averages were 7.9% of all actions for the closed task and 16.7% for the open task) and pressing of the browser's back button (averages were 40.3% of all actions for the closed task and 29.6% for the open task) were also different. On the other hand, behaviors such as selection of hyperlinks, pressing of the home button, and number of browsed pages were similar for both tasks. Search behaviors were influenced by task type when the students searched for information without limitation placed on the information sources.

High heat flow at the SW passive margin of the Gulf of California

Terra Nova ◽  
2021 ◽  
Author(s):  
Rosa Maria Prol‐Ledesma ◽  
Juan Luis Carrillo De La Cruz ◽  
Marco‐Antonio Torres‐Vera ◽  
Alejandro Estradas‐Romero
Keyword(s):  
Heat Flow ◽  
Gulf Of California ◽  
High Heat ◽  
Passive Margin ◽  
High Heat Flow

scholarly journals Precedent Names in the Text Field of Marina Tsvetaeva from the Perspective of Free Indirect Discourse

2017 ◽  
Vol 13 (7) ◽  
pp. 142
Author(s):  
Daniya Abuzarovna Salimova ◽  
Olga Pavlovna Puchinina
Keyword(s):  
World Wide ◽  
The Other ◽  
Specific Character ◽  
Free Indirect Discourse ◽  
Personal Names ◽  
Text Field ◽  
Indirect Discourse ◽  
Marina Tsvetaeva ◽  
The World ◽  
The One

The present study is complied with the topical theme “name in the text” and devoted to the problems of how precedent names as the text-forming elements function in the poems and prose works of Marina Tsvetaeva within the framework of free indirect discourse. The authors study various methods and functions of personal names. The authors make conclusions concerning the frequency of precedent names and the specific character of intertextual elements in Tsvetaeva’s text, which, on the one hand, complicates the perception of the text, but on the other hand, promotes including both the poet and the reader into the world-wide cultural and spiritual environment. The ways of introducing the name and the persona, especially within free indirect discourse, specifies the further existence of the name / or its absence in the text.

A heat-flow reconnaissance of southeastern Alaska

1985 ◽  
Vol 22 (3) ◽  
pp. 416-421 ◽  
Author(s):  
J. H. Sass ◽  
L. A. Lawver ◽  
R. J. Munroe
Keyword(s):  
Heat Flow ◽  
Plate Boundary ◽  
Thermal Spring ◽  
High Heat ◽  
Transform Fault ◽  
High Heat Flow ◽  
Queen Charlotte Islands ◽  
Late Tertiary ◽  
The Mean ◽  
Strain Heating

Heat flow was measured at nine sites in crystalline and sedimentary rocks of southeastern Alaska. Seven of the sites, located between 115 and 155 km landward of the Queen Charlotte – Fairweather transform fault, have an average heat flow of 59 ± 6 mW m−2. This value is significantly higher than the mean of 42 mW m−2 in the coastal provinces between Cape Mendocino and the Queen Charlotte Islands, to the south, and is lower than the mean of 72 ± 2 mW m−2 for 81 values within 100 km of the San Andreas transform fault, even farther south. This intermediate value suggests the absence of significant heat sinks associated with Cenozoic subduction and of heat sources related to either late Cenozoic tectono-magmatic events or significant shear-strain heating. At Warm Springs Bay, 75 km from the plate boundary, an anomalously high heat flow of 150 mW m−2 can most plausibly be ascribed to the thermal spring activity from which its name is derived. At Quartz Hill, 240 km landward of the plate boundary, a value of 115 mW m−2 might indicate a transition to a province of high heat flow resulting from late Tertiary and Quaternary extension and volcanism.

scholarly journals High heat flow in the trans-Hudson Orogen, Central Canadian Shield

1996 ◽  
Vol 23 (21) ◽  
pp. 3027-3030 ◽  
Author(s):  
L. Guillou-Frottier ◽  
C. Jaupart ◽  
J. C. Mareschal ◽  
C. Gariépy ◽  
G. Bienfait ◽  
...  
Keyword(s):  
Heat Flow ◽  
High Heat ◽  
Canadian Shield ◽  
High Heat Flow

scholarly journals Gold in Irish Coal: Palaeo-Concentration from Metalliferous Groundwaters

Minerals ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 635
Author(s):  
Liam A. Bullock ◽  
John Parnell ◽  
Joseph G.T. Armstrong ◽  
Magali Perez ◽  
Sam Spinks
Keyword(s):  
Heat Flow ◽  
Low Temperature ◽  
Precious Metals ◽  
High Heat ◽  
Selenium Content ◽  
Foreland Basins ◽  
High Heat Flow ◽  
South Wales ◽  
First Time ◽  
Very High

Gold grains, up to 40 μm in size and containing variable percentages of admixed platinum, have been identified in coals from the Leinster Coalfield, Castlecomer, SE Ireland, for the first time. Gold mineralisation occurs in sideritic nodules in coals and in association with pyrite and anomalous selenium content. Mineralisation here may have reflected very high heat flow in foreland basins north of the emerging Variscan orogenic front, responsible for gold occurrence in the South Wales Coalfield. At Castlecomer, gold (–platinum) is attributed to precipitation with replacive pyrite and selenium from groundwaters at redox interfaces, such as siderite nodules. Pyrite in the cores of the nodules indicates fluid ingress. The underlying Caledonian basement bedrock is mineralised by gold, and thus likely provided a source for gold. The combination of the gold occurrences in coal in Castlecomer and in South Wales, proximal to the Variscan orogenic front, suggests that these coals along the front could comprise an exploration target for low-temperature concentrations of precious metals.

Specification of Components Based on the WebComposition Component Model

2011 ◽  
pp. 275-284
Author(s):  
Martin Gaedke ◽  
Klaus Turowski
Keyword(s):  
World Wide ◽  
Web Applications ◽  
Process Models ◽  
The Other ◽  
Component Model ◽  
Implementation Model ◽  
Application Systems ◽  
Dynamic Web ◽  
The World ◽  
Development And Evolution

Developing application systems that use the World Wide Web (WWW, Web) as an application platform suffers from the absence of disciplined approaches to develop such Web-applications. Besides, the Web’s implementation model makes it difficult to apply well-known process models to the development and evolution of Web-applications. On the other hand, component-based software development appears as a promising approach that meets essential requirements of developing and evolving highly dynamic Web-applications. With respect to Web-applications, its main objective is to build Web-applications from (standardized) components. Founded on these insights and based on a dedicated component model, we propose an approach to a disciplined specification of components.

scholarly journals Possible interrelation between the lead time of precursory seismic electric signals (SES) and geodynamics in Aegean Sea

2011 ◽  
Vol 11 (6) ◽  
pp. 1599-1603 ◽  
Author(s):  
E. Dologlou
Keyword(s):  
Heat Flow ◽  
Flow Rate ◽  
Lead Time ◽  
Aegean Sea ◽  
High Heat ◽  
Heat Flow Rate ◽  
Seismic Signals ◽  
High Heat Flow ◽  
Area North ◽  
Electric Signals

Abstract. The seismicity of the last 15 years in the Aegean Sea revealed that earthquakes (Mw > 5) with epicentres falling within the Sporades basin and the confined area north of Samos island were preceded by electric seismic signals (SES) with a remarkably long lead time. A possible explanation of this behaviour by means of specific tectonics and geodynamics which characterise these two regions, such as a significant small crustal thickness and a high heat flow rate, has been attempted. New data seem to strengthen the above hypothesis.

Sign in / Sign up

Export Citation Format

Share Document