A magnetic model for the Budgell Harbour Stock, Newfoundland

1976 ◽  
Vol 13 (2) ◽  
pp. 231-236 ◽  
Author(s):  
H. G. Miller
Keyword(s):  
Magnetic Susceptibility ◽  
Detailed Analysis ◽  
The Body ◽  
Aeromagnetic Data ◽  
Surface Rock ◽  
Rock Samples ◽  
Magnetic Model ◽  
Apparent Susceptibility

A detailed analysis of the aeromagnetic data over the Budgell Harbour Stock indicates that the stock can be modelled as a vertical prism having a depth to the bottom of approximately 5.5 km. The depth of the body has been calculated using the measured magnetic susceptibility and NRM data for 6 sample sites from the stock. The modelling results indicate that the apparent susceptibility determined from the surface rock samples are too small to explain the observed anomaly. This indicates that the true apparent susceptibility for the stock is larger than the observed apparent susceptibility.

scholarly journals Magnetic susceptibility of the body-centred orthorhombic La2CuO4system

2005 ◽  
Vol 17 (42) ◽  
pp. 6701-6728 ◽  
Author(s):  
Kyrylo V Tabunshchyk ◽  
R J Gooding
Keyword(s):  
Magnetic Susceptibility ◽  
The Body

scholarly journals The relationship between body weight and exterior measurements in domestic ostriches during the first four months after hatching

2007 ◽  
Vol 23 (1-2) ◽  
pp. 13-20
Author(s):  
Andrey Kurtenkov
Keyword(s):  
Body Weight ◽  
Detailed Analysis ◽  
The Body ◽  
The Other ◽  
Phenotypic Correlation ◽  
Other Hand ◽  
The One ◽  
The Relationship ◽  
Selection Of

It is related leg problems to the realization of the necessity of doing a detailed analysis of the phenotype correlations between body weight and exterior measurements. As a result of the study, lower coefficients have been obtained of the correlation between the girth of the tarso metatarsus on one hand, and the body weight and the girth behind the wings, on the other hand (respectively 0.563 and 0.608), compared with the one between the body weight and the girth behind the wings (0.898). It is advisable in the selection of ostriches to take into consideration the necessity of a higher phenotypic correlation between the girth of the tarso metatarsus on the one hand, and the body weight and the girth behind the wings on the other hand, with a view to preventing leg problems.

Training the Body Politic: Networked Masculinity and the ‘War on Terror’ in Hollywood Film

2016 ◽  
Author(s):  
Adam Knee
Keyword(s):  
Comparative Analysis ◽  
Detailed Analysis ◽  
War On Terror ◽  
Source Code ◽  
Body Politic ◽  
The Body ◽  
James Bond ◽  
Hollywood Film ◽  
Hollywood Films ◽  
Political Perspective

Adam Knee continues this discussion of the action/adventure genre in Chapter Seven, "Training the Body Politic: Networked Masculinity and the 'War on Terror' in Hollywood Film", offering a detailed analysis of the representation of masculinity and agency in two Hollywood films, Unstoppable (2010) and Source Code (2011), which exhibit striking similarities at a range of levels, from their narratives to deeper structures of gendered character function, theme, and geo-political perspective that, he contends, are a manifestation of distinctly post-9/11 American concerns. Like Vincent M. Gaine's chapter on James Bond, Knee analyses both the variations inherent in the genre in the wake of 9/11 and the consistencies of the parameters of American mainstream film, and, more specifically, a developing conceptualization of modes of disciplined masculinity necessitated by the nation’s 'War on Terror' narrative. Knee then concludes with a comparative analysis of a pre-9/11 film and its post-9/11 remake in which these parameters are brought to the fore: the original Paul Verhoeven RoboCop (1987) and RoboCop (2014) directed by José Padilha.

Anisotropy of magnetic susceptibility (AMS) of impact melt breccia and target rocks from the Dhala impact structure, India

2021 ◽  
Author(s):  
Anuj Kumar Singh ◽  
Jayanta Kumar Pati ◽  
Shiva Kumar Patil ◽  
Wolf Uwe Reimold ◽  
Arun Kumar Rao ◽  
...  
Keyword(s):  
Magnetic Susceptibility ◽  
Anisotropy Of Magnetic Susceptibility ◽  
Impact Structure ◽  
Magnetic Phases ◽  
Impact Melt ◽  
Rock Samples ◽  
Average Value ◽  
Magnetic Fabrics ◽  
Target Rock ◽  
The Impact

ABSTRACT The ~11-km-wide, Paleoproterozoic Dhala impact structure in north-central India comprises voluminous exposures of impact melt breccia. These outcrops are discontinuously spread over a length of ~6 km in a semicircular pattern along the northern, inner limit of the monomict breccia ring around the central elevated area. This study of the magnetic fabrics of impact breccias and target rocks from the Dhala impact structure identified a weak preferred magnetic orientation for pre-impact crystalline target rocks. The pre- and synimpact rocks from Dhala have magnetite and ilmenite as common magnetic phases. The distributions of magnetic vectors are random for most impact melt breccia samples, but some do indicate a preferred orientation. Our anisotropy of magnetic susceptibility (AMS) data demonstrate that the shape of susceptibility ellipsoids for the target rocks varies from prolate to oblate, and most impact melt breccia samples display both shapes, with a slight bias toward the oblate geometry. The average value for the corrected degree of anisotropy of impact melt rock (P′ = 1.009) is lower than that for the target rocks (P′ = 1.091). The present study also shows that both impact melt breccia and target rock samples of the Dhala structure have undergone minor postimpact alteration, and have similar compositions in terms of magnetic phases and high viscosity. Fine-grained iron oxide or hydroxide is the main alteration phase in impact melt rocks. Impact melt rocks gave a narrow range of mean magnetic susceptibility (Km) and P′ values, in contrast to the target rock samples, which gave Km = 0.05–12.9 × 10−3 standard international units (SI) and P′ = 1.036–1.283. This suggests similar viscosity of the source magma, and limited difference in the degrees of recorded deformation. Between Pagra and Maniar villages, the Km value of impact melt breccias gradually decreases in a clockwise direction, with a maximum value observed near Pagra (Km = 1.67 × 10−3 SI). The poor grouping of magnetic fabrics for most impact melt rock samples implies local turbulence in rapidly cooled impact melt at the front of the melt flow immediately after the impact. The mean K1 for most impact melt samples suggests subhorizontal (<5°) flow in various directions. The average value of Km for the target rocks (4.41 × 10−3 SI) is much higher compared to the value for melt breccias (1.09 × 10−3 SI). The results of this study suggest that the melt breccias were likely part of a sheet-like body of sizeable extent. Our magnetic fabric data are also supported by earlier core drilling information from ~70 locations, with coring depths reaching to −500 m. Our extensive field observations combined with available widespread subsurface data imply that the impact melt sheet could have covered as much as 12 km2 in the Dhala structure, with an estimated minimum melt volume of ~2.4 km3.

Comparison of Implantable Antennas for Cardiovascular Patients

2015 ◽  
Vol 781 ◽  
pp. 595-598 ◽  
Author(s):  
Pichitpong Soontornpipit
Keyword(s):  
Detailed Analysis ◽  
Medical Devices ◽  
The Body ◽  
Communication Services ◽  
Cardiovascular Patients ◽  
Implantable Antennas ◽  
Mics Band ◽  
Comparative Results ◽  
Folded Dipole ◽  
Implant Communication

Implantable device cardiac observation (ICDO) such as pacemaker requires communication with medical devices outside the body in order to monitor or control the parameters of the organ it is supporting. Three types of implantable antennas have been investigated to determine their performances on two patient conditions: normal and hyperglycemia. Folded dipole, serpentine microstrip, and waffle-type Planar Inverted-F (PIFA) antennas are operated in the 402-405 MHz, which is medical implant communication services (MICS) band. Detailed analysis of the design issues of the antennas and comparative results of simulations and measurements are presented.

THE DETERMINATION OF AN INFINITE INCLINED DIKE FROM THE RESULTS OF GRAVITY AND MAGNETIC SURVEYS

Geophysics ◽  
1948 ◽  
Vol 13 (3) ◽  
pp. 437-442 ◽  
Author(s):  
Laszlo Egyed
Keyword(s):  
Magnetic Susceptibility ◽  
Magnetic Anomaly ◽  
The Body ◽  
Gravitational Gradient ◽  
Ore Bodies ◽  
Gravity And Magnetic ◽  
Anomalous Density

The equations are given for the gravitational gradient and curvature, and for the horizontal and vertical components of the magnetic anomaly for ore bodies of the Kursk type. It is then shown how from these equations the depth, width of crest, angle of dip, anomalous density and magnetic susceptibility of the body may be determined.

Applications and advantages of the Slingram electromagnetic method for archaeological prospecting

Geophysics ◽  
1986 ◽  
Vol 51 (3) ◽  
pp. 576-584 ◽  
Author(s):  
Alain Tabbagh
Keyword(s):  
Electrical Resistivity ◽  
Magnetic Susceptibility ◽  
Apparent Resistivity ◽  
Electromagnetic Method ◽  
Grid Technique ◽  
Types Of Information ◽  
Mesh Grid ◽  
Apparent Susceptibility ◽  
Depth Of Investigation ◽  
Measurement Capabilities

The electromagnetic Slingram method can provide three types of information simultaneously: (1) the apparent resistivity of the ground; (2) its apparent susceptibility; and (3) the characteristic signatures of buried metallic objects. To build an apparatus with these three measurement capabilities requires an appropriate choice of parameters, including frequency, coil separation, and coil orientation as well as calculations which take into account the electrical resistivity and the magnetic susceptibility of the ground. The value of the Slingram method for archaeological applications is shown by two examples: (1) a Gallo‐Roman pottery workshop investigated with measurements of the apparent susceptibility using a reduced sampling wide mesh grid technique; and (2) the study of a Bronze hoard site located in a marsh. Capabilities of the Slingram method may be improved by further study of an apparatus using several receivers which would increase the depth of investigation. Use of several frequencies would overcome difficulties related to resolving the magnetic quadrature susceptibility.

MAGNETIC SUSCEPTIBILITY OF BEDDED IRON‐FORMATION

Geophysics ◽  
1963 ◽  
Vol 28 (5) ◽  
pp. 756-766 ◽  
Author(s):  
Charles E. Jahren
Keyword(s):  
Magnetic Material ◽  
Magnetic Susceptibility ◽  
Diameter Ratio ◽  
Iron Formation ◽  
Volume Percent ◽  
Homogeneous Sample ◽  
Magnetite Content ◽  
The Relationship ◽  
Apparent Susceptibility ◽  
Layered Samples

The susceptiblity of natural and artificial iron‐formation samples in the form of cylinders with length‐to‐diameter ratio less than 1.2 and susceptibility up to one cgs unit was measured in fields of the order of one gauss. Demagnetization factors calculated for the centers of the cylinders explain observed changes of apparent susceptibility with length and direction of magnetization. Layered samples made by stacking disks of magnetic and nonmagnetic material alternately show susceptibility as much as three times greater parallel to the layers than across them, with layer susceptibility as high as 0.5 cgs. This anisotropy increases with increasing layer susceptibility and is largely independent of the details of layering when less than half the volume of the sample is magnetic material. Natural layered samples show the same range of susceptibility anisotropy. The relationship between susceptibility, k, and volume percent magnetite, V, can be approximated by [Formula: see text] cgs, 10<V<40, corresponding to susceptibility 0.7 for pure magnetite. The along‐the‐layer susceptibility of a bedded sample containing 20 volume percent total magnetite is twice that of a homogeneous sample of the same overall magnetite content. For one percent total magnetite, it is three times as great.

Mapping of apparent magnetic susceptibility and the identification of fractures: A case study from the Eye-Dashwa Lakes pluton, Atikokan, Ontario

Geophysics ◽  
2010 ◽  
Vol 75 (3) ◽  
pp. B147-B156 ◽  
Author(s):  
Madeline D. Lee ◽  
William A. Morris ◽  
Hernan A. Ugalde
Keyword(s):  
Magnetic Susceptibility ◽  
Forward Modeling ◽  
Local Scale ◽  
Magnetic Data ◽  
Susceptibility Map ◽  
Magnetic Minerals ◽  
Data Set ◽  
Susceptibility Data ◽  
Apparent Susceptibility

In situ magnetic-susceptibility measurements are only possible on outcrops, which are often limited by overburden and water bodies. An alternative approach is to derive an apparent susceptibility map from total-magnetic-intensity (TMI) surveys, which was done in this study for the Eye-Dashwa Lakes pluton near Atikokan, Ontario. Susceptibility logs of cores directly link alteration to systematic changes in the amount and composition of magnetic minerals. The surficial distribution of alteration zones was originally estimated from a limited number of in situ magnetic-susceptibility measurements. Here, through forward modeling of the TMI data set, susceptibility data are used to validate the apparent susceptibility data set. The modeling accounts for the bathymetric surface of all lakes that cover the area. A two-step process of bulk and local-scale modeling was used to estimate apparent susceptibility patterns. Bulk magnetic susceptibility is used as an indicator of overall alteration content, and local-scale apparent magnetic-susceptibility values are computed using a forward-modeling routine. The new apparent magnetic data set indicates northwest and northeast linears, which are the same as those seen in previous studies.

scholarly journals Analysis of Ultramafic Rocks Weathering Level in Konawe Regency, Southeast Sulawesi, Indonesia Using the Magnetic Susceptibility Parameter

2020 ◽  
Vol 5 (2) ◽  
pp. 73-81
Author(s):  
Jahidin ◽  
LO. Ngkoimani ◽  
LM. Iradat Salihin ◽  
Hasria ◽  
Erzam S. Hasan ◽  
...  
Keyword(s):  
Magnetic Susceptibility ◽  
Source Rock ◽  
Ultramafic Rock ◽  
Nickel Content ◽  
Ultramafic Rocks ◽  
Petrographic Analysis ◽  
Magnetic Minerals ◽  
Rock Samples ◽  
Weathering Process

The Konawe region is part of the Sulawesi Southeast Arm ophiolite belt where ultramafic rocks are exposed in the form of dunite and peridotite. The formation of nickel deposits is closely related to the weathering process of ultramafic rocks as a source rock. Ultramafic rocks exposed to the surface will experience weathering which is influenced by many factors, including in the form of climate change, topography, and existing geological structures. The weathering process in the source rock can influence variations in chemical elements and magnetic properties in laterite soil profiles. For example, the chemical weathering might affect magnetic mineralogy and the physical weathering could affect granulometry as well as the quantity of magnetic minerals in the soil. Condition of weathering of ultramafic rocks (initial, moderate and advanced) can affect nickel content in laterite sediments. The weathering profile study of serpentine mineral is an indication of the lateralization process that occurs in ultramafic rocks and is carried out through petrographic analysis of thin cuts and polish cuts. Determination of weathering level like this is based on the level of weathering of the mineral serpentine. In this study, the determination of the weathering level of ultramafic rocks (initial, moderate, and continued) uses magnetic susceptibility parameter. A total of 232 ultramafic rock core samples obtained from 34 hand samples were taken from different places and weathered levels were analyzed. The results of the research have shown that the magnetic susceptibility of ultramafic rocks in the study area varies, from 580 x 10-6 SI to 4.724 x 10-6 SI. Based on the value of magnetic susceptibility, magnetic minerals contained in ultramafic rock samples are hematite and geotite minerals. This means that the weathering level of ultramafic rock samples is the continued weathering level. The level of continued weathering that occurs in ultramafic rocks in the study area produces nickel laterite deposits with a nickel content of 1.65 - 2.40% in the saprolite zone, 0.42% in the saprock zone, and 0.20 - 0.51% in the basic rock zone (bedrock).

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