scholarly journals High resolution aeromagnetic survey of St-Mary's river area, Nova Scotia

1979 ◽  
Author(s):  
Keyword(s):  
Nova Scotia ◽  
High Resolution ◽  
Aeromagnetic Survey

Aeromagnetic survey in central West Greenland: project Aeromag 2001

2002 ◽  
pp. 67-72 ◽  
Author(s):  
Thorkild M. Rasmussen
Keyword(s):  
High Resolution ◽  
Magnetic Measurements ◽  
Geophysical Data ◽  
High Quality ◽  
Aeromagnetic Survey ◽  
Original Series ◽  
West Greenland ◽  
Airborne Measurements ◽  
Geophysical Surveys ◽  
Airborne Geophysical Data

NOTE: This article was published in a former series of GEUS Bulletin. Please use the original series name when citing this article. Rasmussen, T. M. (1). Aeromagnetic survey in central West Greenland: project Aeromag 2001. Geology of Greenland Survey Bulletin, 191, 67-72. https://doi.org/10.34194/ggub.v191.5130 The series of government-funded geophysical surveys in Greenland was continued during the spring and summer of 2001 with a regional aeromagnetic survey north of Uummannaq, project Aeromag 2001 (Fig. 1). The survey added about 70 000 line kilometres of high-quality magnetic measurements to the existing database of modern airborne geophysical data from Greenland. This database includes both regional high-resolution aeromagnetic surveys and detailed surveys with combined electromagnetic and magnetic airborne measurements.

High resolution aeromagnetic survey of Lake Superior

Eos ◽  
1991 ◽  
Vol 72 (8) ◽  
pp. 81-81 ◽  
Author(s):  
D. J. Teskey ◽  
M. D. Thomas ◽  
R. A. Gibb ◽  
S. D. Dods ◽  
R. P. Kucks ◽  
...  
Keyword(s):  
High Resolution ◽  
Lake Superior ◽  
Aeromagnetic Survey

AN AUTOMATIC METHOD OF COMPILATION AND MAPPING OF HIGH‐RESOLUTION AEROMAGNETIC DATA

Geophysics ◽  
1971 ◽  
Vol 36 (4) ◽  
pp. 695-716 ◽  
Author(s):  
B. K. Bhattacharyya
Keyword(s):  
High Resolution ◽  
Magnetic Measurements ◽  
High Sensitivity ◽  
Positional Error ◽  
Automatic Method ◽  
Aeromagnetic Data ◽  
Aeromagnetic Survey ◽  
Machine Method ◽  
Flux Gate ◽  
Definition Of

An automatic method has been developed for compilation of digital aeromagnetic data. This method has been applied to the data obtained during a high‐sensitivity aeromagnetic survey over an area in the Precambrian shield of northeastern Ontario in Canada. With this method, all points of intersection between traverse and base lines are determined automatically and adjusted within the limits of positional error for minimizing differences in magnetic values at the intersections. Then the data are corrected for diurnal variation and leveled to tie the magnetic measurements together. Next, the resulting total field values are contoured with a machine method at a scale of 1:25,000. For such a scale, the minimum contour interval that can be used in the present area is two gammas. However, because of the accuracy of the method of compilation, with a larger scale, it is possible to trace one‐gamma contours. The maps thus compiled have been compared with published aeromagnetic maps of data obtained with conventional flux‐gate and proton‐precession magnetometers. The new maps are vastly superior to the old ones for delineating trends, patterns, and fine features of available detailed geological maps. This superiority is mainly due to the excellent definition of small amplitude anomalies, some of only a few gammas in magnitude, on the high‐resolution magnetic maps.

scholarly journals Prediction of soil nutrient regime based on a model of DEM-generated clay content for the province of Nova Scotia, Canada

2013 ◽  
Vol 93 (2) ◽  
pp. 193-203 ◽  
Author(s):  
Zhengyong Zhao ◽  
M. Irfan Ashraf ◽  
Kevin S. Keys ◽  
Fan-Rui Meng
Keyword(s):  
Nova Scotia ◽  
High Resolution ◽  
Soil Nutrient ◽  
Clay Content ◽  
Parent Material ◽  
Forest Growth ◽  
Soil Maps ◽  
Large Area ◽  
Nutrient Regime ◽  
Coarse Resolution

Zhao, Z., Ashraf, M. I., Keys, K. S. and Meng, F-R. 2013. Prediction of soil nutrient regime based on a model of DEM-generated clay content for the province of Nova Scotia, Canada. Can. J. Soil Sci. 93: 193–203. Soil nutrient regime (SNR) maps are widely required by ecological studies as well as forest growth and yield assessment. Traditionally, SNR is assessed in the field using vegetation indicators, topography and soil properties. However, field assessments are expensive, time consuming and not suitable for producing high-resolution SNR maps over a large area. The objective of this research was to develop a new model for producing high-resolution SNR maps over a large area (in this case, the province of Nova Scotia). The model used 10-m resolution clay content maps generated from digital elevation model data to capture local SNR variability (associated with topography) along with coarse-resolution soil maps to capture regional SNR variability (associated with differences in landform/parent material types). Field data from 1385 forest plots were used to calibrate the model and another 125 independent plots were used for model validation. Results showed field-identified SNRs were positively correlated with predicted clay content, with some variability associated with different landform/parent material types. Accuracy assessment showed that 63.7% of model-predicted SNRs were the same as field assessment, with 96.5% within ±1 class compared with field-identified SNRs. The predicted high-resolution SNR map was also able to capture the influence of topography on SNR which was not possible when predicting SNR from coarse-resolution soil maps alone.

Integration and spatial analysis of high-resolution geophysical and geological data, eastern Gaspé Peninsula

2004 ◽  
Vol 41 (5) ◽  
pp. 603-618 ◽  
Author(s):  
Christine St-Laurent ◽  
Daniel Lebel ◽  
Denis Lavoie ◽  
Michel Malo ◽  
Camille St-Hilaire
Keyword(s):  
High Resolution ◽  
Sedimentary Cover ◽  
Volcanic Rocks ◽  
Aeromagnetic Survey ◽  
Near Surface ◽  
Low Pass ◽  
Gravimetric Data ◽  
Significant Intensity ◽  
Geophysical Anomalies ◽  
The Town

In the vicinity of the Town of Gaspé, the relationships between the Silurian-Devonian sedimentary succession of the Gaspé Belt and the Humber and the Dunnage zones are complex. To unravel these relationships, we used high-resolution aeromagnetic data and regional gravimetric data coupled with field tectonostratigraphic information. The magnetic vertical derivative located several magnetic anomalies associated with near-surface features in the Silurian–Devonian cover sequence. In particular, a conglomerate with magnetic fragments that overlies the Late Silurian Salinic Unconformity is clearly recognizable. Large ovoid anomalies of significant intensity located in the Silurian–Devonian sedimentary cover area cannot be associated with any known geological feature. The interpretation of the high-pass and low-pass filtered aeromagnetic survey indicates that the ovoid anomalies originate below the Silurian–Devonian cover sequence. The most significant of the ovoid anomalies is associated with a gravimetric anomaly. It is proposed that these geophysical anomalies are probably associated with ultramafic and (or) volcanic rocks correlative in the subsurface with outcrops of the Cambrian–Ordovician lithologies of the Lady Step Complex and (or) the Shickshock Group.

scholarly journals Coastal Upwelling Off Southwest Nova Scotia Simulated With a High-Resolution Baroclinic Ocean Model

2018 ◽  
Vol 123 (4) ◽  
pp. 2318-2331 ◽  
Author(s):  
Fatemeh Chegini ◽  
Youyu Lu ◽  
Anna Katavouta ◽  
Harold Ritchie
Keyword(s):  
Nova Scotia ◽  
High Resolution ◽  
Coastal Upwelling ◽  
Ocean Model
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