Download or read book TERRESTRIAL HEAT FLOW IN EAST AND SOUTHERN AFRICA AND THE THERMAL STRUCTURE OF PRECAMBRIAN LITHOSPHERE TANZANIA ZAMBIA ZIMBABWE written by ANDREW ARNOLD NYBLADE and published by . This book was released on 1992 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt: robust because surface heat flow appears to be insensitive to the details of how mantle heat is delivered to the base of the lithosphere.
Download or read book Terrestrial Heat Flow and the Lithosphere Structure written by Vladimir Cermak and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 749 pages. Available in PDF, EPUB and Kindle. Book excerpt: Terrestrial Heat Flow and the Lithosphere Structure summarizes current problems of analyzing related data. The individual chapters are written by leading scientists in geothermics, and are arranged in three sections: - General Lithospheric Geothermics - Regional Lithospheric Geothermics - Worldwide Heat Flow Density Studies. Emphasis is laid on the interrelations between lithospheric structure and local heat flow fields.
Download or read book TERRESTRIAL HEAT FLOW AND THERMAL STRUCTURE OF THE LITHOSPHERE IN SOUTHERN AFRICA BOTSWANA NAMIBIA SOUTH AFRICA ZAMBIA written by SANFORD BALLARD and published by . This book was released on 1987 with total page 151 pages. Available in PDF, EPUB and Kindle. Book excerpt: there is evidence in southern Africa in the form of post-Archean tectonic and igneous activity.
Download or read book Terrestrial heat flow and lithosphere structure written by Vladimír Čermák and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Terrestial Heat Flow and Thermal Structure of the Lithosphere in Southern Africa written by Sanford Ballard and published by . This book was released on 1989 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Heat Flow in South Africa written by M. Q. W. Jones and published by . This book was released on 1992 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1992-11 with total page 668 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book List of M A and Ph D Theses on Zambia written by and published by . This book was released on 1999 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Terrestrial Heat Flow and Thermal Structure of the Earth written by and published by . This book was released on 1977 with total page 115 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Surface Heat Flow and Lithospheric Thermal Structure of the Northwestern Arabian Plate written by Felina Schütz and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The surface heat flow (qs) is paramount for modeling the thermal structure of the lithosphere. Changes in the qs over a distinct lithospheric unit are normally directly reflecting changes in the crustal composition and therewith the radiogenic heat budget (e.g., Rudnick et al., 1998; Förster and Förster, 2000; Mareschal and Jaupart, 2004; Perry et al., 2006; Hasterok and Chapman, 2011, and references therein) or, less usual, changes in the mantle heat flow (e.g., Pollack and Chapman, 1977). Knowledge of this physical property is therefore of great interest for both academic research and the energy industry. The present study focuses on the qs of central and southern Israel as part of the Sinai Microplate (SM). Having formed during Oligocene to Miocene rifting and break-up of the African and Arabian plates, the SM is characterized by a young and complex tectonic history. Resulting from the time thermal diffusion needs to pass through the lithosphere, on the order of several tens-of-millions of years (e.g., Fowler, 1990); qs-values of the area reflect conditions of pre-Oligocene times. The thermal structure of the lithosphere beneath the SM in general, and south-central Israel in particular, has remained poorly understood. To address this problem, the two parameters needed for the qs determination were investigated. Temperature measurements were made at ten pre-existing oil and water exploration wells, and the thermal conductivity of 240 drill core and outcrop samples was measured in the lab. The thermal conductivity is the sensitive parameter in this determination. Lab measurements were performed on both, dry and water-saturated samples, which is labor- and time-consuming. Another possibility is the measurement of thermal conductivity in dry state and the conversion to a saturated value by using mean model approaches. The availability of a voluminous and diverse dataset of thermal conductivity values in this study allowed (1) in connection with the temperature gradient to calculate new reliable qs values and to use them to model the thermal pattern of the crust in south-central Israel, prior to young tectonic events, and (2) in connection with comparable datasets, controlling the quality of different mean model approaches for indirect determination of bulk thermal conductivity (BTC) of rocks. The reliability of numerically derived BTC values appears to vary between different mean models, and is also strongly dependent upon sample lithology. Yet, correction algorithms may significantly reduce the mismatch between measured and calculated conductivity values based on the different mean models. Furthermore, the dataset allowed the derivation of lithotype-specific conversion equations to calculate the water-saturated BTC directly from data of dry-measured BTC and porosity (e.g., well log derived porosity) with no use of any mean model and thus provide a suitable tool for fast analysis of large datasets. The results of the study indicate that the qs in the study area is significantly higher than previously assumed. The new presented qs values range between 50 and 62 mW m−2. A weak trend of decreasing heat flow can be identified from the east to the west (55-50 mW m−2), and an increase from the Dead Sea Basin to the south (55-62 mW m−2). The observed range can be explained by variation in the composition (heat production) of the upper crust, accompanied by more systematic spatial changes in its thickness. The new qs data then can be used, in conjunction with petrophysical data and information on the structure and composition of the lithosphere, to adjust a model of the pre-Oligocene thermal state of the crust in south-central Israel. The 2-D steady-state temperature model was calculated along an E-W traverse based on the DESIRE seismic profile (Mechie et al., 2009). The model comprises the entire lithosphere down to the lithosphere-asthenosphere boundary (LAB) involving the most recent knowledge of the lithosphere in pre-Oligocene time, i.e., prior to the onset of rifting and plume-related lithospheric thermal perturbations. The adjustment of modeled and measured qs allows conclusions about the pre-Oligocene LAB-depth. After the best fitting the most likely depth is 150 km which is consistent with estimations made in comparable regions of the Arabian Shield. It therefore comprises the first ever modelled pre-Oligocene LAB depth, and provides important clues on the thermal state of lithosphere before rifting. This, in turn, is vital for a better understanding of the (thermo)-dynamic processes associated with lithosphere extension and continental break-u
Download or read book Heat Flow and Lithosphere Structure written by and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Terrestrial Heat Flow Studies and the Structure of the Lithosphere written by International Heat Flow Commission and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Terrestrial Heat Flow Studies and the Structure of the Lithosphere written by Geophysical Institute, Czechoslovak Academy of Sciences and published by . This book was released on 1982 with total page 87 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Crustal Evolution of Southern Africa written by A. J. Tankard and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt: Syntheses of the geology of major areas of the Earth's crust are increasingly needed in order that the features of, and the problems associated with, the secular evolution of the continents can be understood by a wide audience. Southern Africa is fortunate in having a remarkable variety of geological environments developed without many breaks over 3. 8 Ga, and many of the rock groups are household names throughout the geological world. In one respect the geology of Southern Africa is particularly important: cratonization clearly began as early as 3. 0 Ga ago, in contrast to about 2. 5 Ga in most other continental areas such as North America. This book documents very well the remarkable change in tectonic conditions that took place between the Early and Mid-Precambrian; we have here evidence of the very earliest development of rigid lithospheric plates. This book is a tribute to the multitudes of scientists who have worked out the geology of Southern Africa over many years and decades. Whatever their discipline, each provided a step in the construction of this fascinating story of 3. 8 Ga of crustal development. In the book the reader will find a detailed review of the factual data, together with a balanced account of interpretative models without the indulgence of undue speculation. One of its attractions is its multidisciplinary approach which provides a stimulating challenge to the reader.
Download or read book Terrestrial Heat Flow written by William Hung Kan Lee and published by . This book was released on 1965 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Terrestrial Heat Flow and Structure of the Lithosphere IV written by Vladimír Čermák and published by . This book was released on 1998 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt:
