Crustal Heat Flow and Thermal Modeling of the Hikurangi Trough, New Zealand PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Crustal Heat Flow and Thermal Modeling of the Hikurangi Trough, New Zealand PDF full book. Access full book title Crustal Heat Flow and Thermal Modeling of the Hikurangi Trough, New Zealand by Anson M. Antriasian. Download full books in PDF and EPUB format.
Author: Anson M. Antriasian
Publisher:
ISBN:
Category : Ocean bottom temperature
Languages : en
Pages : 57
Get Book Here
Book Description
Measuring surface heat flow at the Hikurangi Trough is key toward characterizing the local thermal regime and the influence of thermally sensitive processes such as fluid flow and slow slip. Marine heat flow data were collected during May– June 2015 in the northern Hikurangi Trough at sites seaward and landward of the deformation front, giving mean and one standard deviation values of 58 ± 16 and 46 ± 15 mW m−2 respectively. A 3.5 m violin-bow style probe was used to measure thermal conductivity and temperature gradient of the seafloor, and heat flow is calculated using Fourier’s law. Two-dimensional steady-state, finite element modeling was undertaken to analyze the influence of subduction parameters on surface heat flow and temperature along the subduction thrust. Heat flow values seaward of the deformation front have been found to be sensitive to the structure of buried and outcropping extrusive crust, but the mean heat flow is within the range of expected values for lithosphere this age (120 Myr) according to the GDH1 cooling model. Landward of the deformation front, measured heat flow is in excess of preferred modeled values. I interpret these observations as evidence for fluid flow within a crustal aquifer system and through splay faults within the forearc. A heat flow discontinuity of 40 mW m−2 landward of the deformation front supports the presence of compaction sourced fluid along the subduction thrust, which is consistent with previous evidence for excess pore pressure and the occurrence of shallow slow slip.
Author: Anson M. Antriasian
Publisher:
ISBN:
Category : Ocean bottom temperature
Languages : en
Pages : 57
Get Book Here
Book Description
Measuring surface heat flow at the Hikurangi Trough is key toward characterizing the local thermal regime and the influence of thermally sensitive processes such as fluid flow and slow slip. Marine heat flow data were collected during May– June 2015 in the northern Hikurangi Trough at sites seaward and landward of the deformation front, giving mean and one standard deviation values of 58 ± 16 and 46 ± 15 mW m−2 respectively. A 3.5 m violin-bow style probe was used to measure thermal conductivity and temperature gradient of the seafloor, and heat flow is calculated using Fourier’s law. Two-dimensional steady-state, finite element modeling was undertaken to analyze the influence of subduction parameters on surface heat flow and temperature along the subduction thrust. Heat flow values seaward of the deformation front have been found to be sensitive to the structure of buried and outcropping extrusive crust, but the mean heat flow is within the range of expected values for lithosphere this age (120 Myr) according to the GDH1 cooling model. Landward of the deformation front, measured heat flow is in excess of preferred modeled values. I interpret these observations as evidence for fluid flow within a crustal aquifer system and through splay faults within the forearc. A heat flow discontinuity of 40 mW m−2 landward of the deformation front supports the presence of compaction sourced fluid along the subduction thrust, which is consistent with previous evidence for excess pore pressure and the occurrence of shallow slow slip.
Author: G. R. Beardsmore
Publisher: Cambridge University Press
ISBN: 9780521797030
Category : Science
Languages : en
Pages : 340
Get Book Here
Book Description
A handbook for geologists and geophysicists who manipulate thermal data; professionals researchers, and advanced students.
Author: Ren Wang
Publisher: Birkhäuser
ISBN: 3034892004
Category : Science
Languages : en
Pages : 334
Get Book Here
Book Description
Geodynamics concerns the dynamics of the earth's global motion, of the earth's interior motion and its interaction with surface features, together with the mechanical processes in the deformation and rupture of geological structures. Its final object is to determine the driving mechanism of these motions. It is highly interdisciplinary. In providing the basic geological, geophysical infromation required for a comprehensive mechanical analysis, there are also many mechanical problems involved, which means the problem is coupled intricately with geophysics, rock mechanics, seismology, structural geology, etc. This is Part II of the Proceedings of an IUTAM/IASPEI Symposium on Mechanics Problems in Geodynamics held in Beijing, September 1994. It discusses different aspects of mechanics problems in geodynamics involving the earth's rotation, tectonic analyses of various parts of the world, mineral physics and flow in the mantle, seismic source studies and wave propagation and application of the DDA method in tectonic analysis.
Author: M. P. Coward
Publisher: Geological Society of London
ISBN: 9781862392151
Category : Science
Languages : en
Pages : 616
Get Book Here
Book Description
Author: Geological Survey (U.S.)
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 452
Get Book Here
Book Description
Author: C. A. Stein
Publisher:
ISBN:
Category : Geology
Languages : en
Pages :
Get Book Here
Book Description
Author: S. F. Simmons
Publisher:
ISBN: 9780868690834
Category : Geothermal engineering
Languages : en
Pages : 534
Get Book Here
Book Description
Author: Larry J. Ruff
Publisher: Birkhäuser
ISBN: 3034891407
Category : Science
Languages : en
Pages : 280
Get Book Here
Book Description
Subduction zones consume oceanic lithosphere and are an indispensible part of plate tectonics. Unlike the oceanic lithosphere production system which can be linked as a nearly continuous, albeit sinuous, strand around the earth, subduction zones are a rather dissociated group and are found in several isolated corners of the world. While plate tectonics can predict that subduction zones are required along certain plate boundaries, it does not stipulate how subduction zones initiate and develop. The preservation of newly created oceanic lithosphere and the propensity for spreading centers to fragment continents leaves a wealth of geological informa tion on the initiation and evolution of spreading. On the other hand, the subject of subduction initiation has little observational basis. To find such observations, we need to look at some muddled tectonic regimes. The Macquarie Ridge complex presents a natural laboratory for studies of subduction initiation. 2. Tectonics of the Macquarie Ridge Complex The Macquarie Ridge complex is a complicated physiographic feature that trends approximately north-south between South Island, New Zealand and the Pacific-Antarctica spreading center. This feature consists of a sequence of troughs and ridges, with Macquarie Island as the only exposed expression. The seismically active Macquarie Ridge complex (hereafter: MRC) is crudely continuous with the Tonga-Kermadec-New Zealand seismic activity. The basic physiographic features and seismicity of the MRC are shown in Figure I. The earthquake epicenters generally cluster about the bathymetric expression of the MRC.
Author: National Science Foundation (U.S.)
Publisher:
ISBN:
Category : Engineering
Languages : en
Pages : 1108
Get Book Here
Book Description
Author: B. D. Field
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 330
Get Book Here
Book Description
