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ABSTRACT
3D seismic data from salt structures in the Southern North Sea show how viscous fluids tend to migrate towards and flow upwards along the footwalls of active normal faults where zones of low stress are inherent. This process provides one potential solution for the question of how enough space is created to accommodate large granitic bodies in the crust. During episodes of regional extension, granitic melt may collect in the lower crust below normal detachments in domed areas from which magma may be sourced. Subsequently, in the upper crust, emplacement can occur in fault-bounded laccoliths at rates commensurate with other geological processes. 相似文献
3D seismic data from salt structures in the Southern North Sea show how viscous fluids tend to migrate towards and flow upwards along the footwalls of active normal faults where zones of low stress are inherent. This process provides one potential solution for the question of how enough space is created to accommodate large granitic bodies in the crust. During episodes of regional extension, granitic melt may collect in the lower crust below normal detachments in domed areas from which magma may be sourced. Subsequently, in the upper crust, emplacement can occur in fault-bounded laccoliths at rates commensurate with other geological processes. 相似文献
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Tom Quirk 《Asia-Pacific Journal of Atmospheric Sciences》2012,48(4):339-344
The apparent leveling of the global temperature time series at the end of the 1990s may represent a break in the upward trend. A study of the time series measurements for temperature, carbon dioxide, humidity and methane shows changes coincident with phase changes of the Atlantic and Pacific Decadal Oscillations. There are changes in carbon dioxide, humidity and methane measurement series in 2000. If these changes mark a phase change of the Pacific Decadal Oscillation then it might explain the global temperature behavior. 相似文献
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J. I. GonzáLez-Serrano M. Sánchez-Portal H Castañeda R. Quirk E. D. de Miguel M. Aguiar J. Cepa 《Experimental Astronomy》2004,18(1-3):65-75
OSIRIS is a Day One instrument that will be available at the 10m GTC telescope which is being built at La Palma observatory
in the Canary Islands. This optical instrument is designed to obtain wide-field narrow-band images using tunable filters and
to do low-resolution spectroscopy in both long-slit and multislit modes. For the multislit spectroscopy mode, we have developed
a software to assist the observers to design focal plane masks. In this paper we describe the characteristics of this Mask
Designer tool. We discuss the main design concepts, the functionality and particular features of the software. 相似文献
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Brendon J. Quirk Glen N. Mackey Diego P. Fernandez Andy Armstrong Jeffrey R. Moore 《第四纪科学杂志》2020,35(6):776-790
Rapid and high-magnitude North Atlantic climate oscillations following the Last Glacial Maximum have been correlated to climate change events in western North America. However, the strength of teleconnections between the North Atlantic and the interior of western North America remains poorly understood. We present a U-series calibrated speleothem record from Timpanogos Cave National Monument, located at 2040 m asl in the Wasatch Mountains of Utah, spanning 13.5–10.6 ka. Additionally, we carried out a climate reconstruction for a coeval glacier advance in the Wind River Range of Wyoming. Our results indicate that between 13.5 and 12.8 ka, the Wasatch was probably first cool and dry and then warmed. After 12.8 ka, our record suggests cool and/or wetter conditions followed by reduced moisture until 11.8 ka, followed by an early Holocene wet period. The Timpanogos record exhibits few similarities with those from the North Atlantic. Climate reconstructions of the Titcomb Basin glacier suggest modest temperature depressions relative to modern (<−3 °C) were necessary to sustain the glacier with a moderate increase in precipitation (>150%). The high-altitude speleothem record presented here provides a valuable basis for understanding latest Pleistocene–early Holocene glacial episodes in western North America. 相似文献
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