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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
provided by the
Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
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Showing 131 to 140 of 463 (0.014 seconds)| 131 |
A sedimentary study of the sandstones between the horizons of the 4ft. 0 in. coal and the Gorllwyn coal of the Middle Coal measures of the South Wales coalfieldThomas, L. P. January 1969 (has links)
No description available.
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| 132 |
Petrological studies of the lavas and associated rocks of the Arthur's Seat volcanoClark, R. H. January 1953 (has links)
No description available.
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| 133 |
A Reappraisal of the Petrology and Origins of the Lherz PeridotiteRiches, Amy Jane Victoria January 2009 (has links)
No description available.
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| 134 |
Provenance of neogene sandstones of Sabah, northern BorneoSuggate, Simon Matthew January 2011 (has links)
No description available.
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| 135 |
Thermal and tectonic controls on magmatism in the Ethiopian provinceGeorge, R. M. M. January 1997 (has links)
No description available.
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| 136 |
Tectonics and magma evolution of Nicaraguan volcanic systemsWyk de Vries, Benjamin van January 1993 (has links)
No description available.
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| 137 |
Emplacement and metamorphic processes in kimberlite eruptions : insights from dark volcaniclastic kimberlite of the BK9 Kimberlite, BotswanaBuse, Benjamin January 2011 (has links)
No description available.
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| 138 |
Incremental pluton growth : building of large magma chambersSchöpa, Anne K. January 2013 (has links)
Numerical models of conductive heat flow have been used to explore the connection between incremental pluton growth and large magma chambers. The simulations include repeated sill injections of melt into the crust using variable repose times in between these injections. Adopting this novel approach of a changing magma flux during the emplacement time of a pluton, different intrusion scenarios are tested to constrain the conditions for melt accumulation in the crust during progressive pluton growth. Results reveal that only a rapid increase in magma flux above a background value representative for plutons can lead to the formation of magma reservoirs. Field observations, image analysis (lA) with the intercept method and an anisotropy of magnetic susceptibility (AMS) study are conducted in the silicic Lago della Vacca Complex (LVC) in the Adamello Batholith, northern Italy, to gain insight into magmatic and magnetic fabrics. Combining this data enabled a detailed emplacement scenario for the LVC to be developed. Furthermore, a comparison between the results of lA and AMS shows that these methods are consistent, thus emphasising the applicability of lA and AMS in silicic rocks to reconstruct intrusion emplacement. This is the first comprehensive comparison between AMS and mineral fabrics, obtained by field measurements, lA and computer-assisted X-ray micro-tomography (X-ray /LCT) of which we are aware. The X-ray /LCT images provide the base to acquire the shape-preferred orientation (Spa) of magnetites and mafic silicates, and the spatial distribution of magnetites in a sample. Results show that the AMS signal is consistent with the spa of magnetite grains and clusters but differs from the distribution of the magnetites, suggesting that the AMS is controlled by magnetite grain shape. Moreover, the AMS agrees with the field measurements, lA and the spa of the mafic silicates underlining that lA and AMS can be applied to characterise fabrics in ferromagnetic granitoids. III
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| 139 |
Ascent and emplacement of Kimerlite magmaskavanagh, Janine Lynsey January 2010 (has links)
No description available.
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| 140 |
Formation and evolution of the Sudbury impact melt sheetDarling, James R. January 2010 (has links)
No description available.
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