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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.
Search results
Showing 171 to 180 of 463 (0.022 seconds)| 171 |
The igneous and metamorphic rocks of the eastern end of the Geallaig Hill, West AberdeenshireTocher, F. E. January 1959 (has links)
No description available.
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| 172 |
The geology and petrology of Pico Island volcano, Azores, PortugalWoodhall, D. G. January 1976 (has links)
No description available.
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| 173 |
Contributions to the study of clastic cave sediments, with particular reference to Agen Allwedd, PowysBull, P. A. January 1976 (has links)
No description available.
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| 174 |
Structural and chemical studies in the Dalradian rocks of Western PerthshireBall, T. K. January 1962 (has links)
No description available.
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| 175 |
Lower Liassic sediments of the central High Atlas, MoroccoBurgess, C. J. January 1976 (has links)
No description available.
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| 176 |
Multiple intrusions and pervasive hydrothermal alteration in the St. Austell graniteHill, Patrick Ian January 1988 (has links)
No description available.
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| 177 |
Sedimentology and stratigraphic evolution of the early Permian Warchha Sandstone, Salt Range, PakistanGhazi, Shahid January 2009 (has links)
No description available.
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| 178 |
Jabal Al Wasq : a Precambrian basic and ultrabasic igneous complex in the Northern Hijaz of Saudi ArabiaBakor, A. R. January 1974 (has links)
No description available.
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| 179 |
Characterisation of Palaeoproterozoic Laxfordian regional metamorphism in the Western Isles (Outer Hebrides), NW ScotlandGriffin, Mark Andrew January 2009 (has links)
No description available.
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| 180 |
Sand provenance, diagenesis and hydrocarbon charge history of the Kwanza Basin, AngolaMachado, Vladimir Alberto Gouveia January 2007 (has links)
Sand provenance in the Kwanza Basin, Angola, is assessed using conventional and varietal heavy mineral analysis. There are contrasting heavy mineral signatures in the north and south of the basin separated by a hybrid zone. These contrasts are attributed to different hinterland geology. Heavy mineralogy, sand body distribution and prominent structures allowed the subdivision of the Kwanza Basin into five depositional domains. Heavy mineral indices filter important provenance signatures in space and time in addition to providlng tectonic and geomorphologic information. Quantitative and qualitative thermal and composition information was obtained from fluid inclusions using UV fluorescence and microthermometry. There were at least two pulses of hydrocarbon generation and migration from source rocks in the basin based on homogenization temperatures of 52-129°C, geochemical characterization of oil shows from proprietary data, and Genesis basin modelling: 1) during Albian time, rift-related high heat flow triggered the first pulse, and 2) high rates of sedimentation led to a burial-induced pulse during the Neogene-Quaternary. There are three main controls on diagenesis: stratigraphy and facies; thermal history; and provenance. Significant authigenic minerals (illite, smectite, dolomite, quartz and feldspar) were only noted in Cenomanian or older rocks. Apatite fission track analysis (AFTA) yields a record of the temperature regime experienced by the basin and basement through the pre-rift, syn-rift and post-rift stages. There were three main tectono-thermal events in the basin: 1) pre-rift and early syn-rift cooling; 2) a post-rift period of tectonic quiescence (Cretaceous to early Tertiary); interrupted by 3) a rapid cooling (denudation) due to epeirogenic uplift of the Inner Kwanza Basin and hinterland at ca. 23 Ma. Miocene denudation of the Inner Kwanza Basin and the hinterland is mirrored by a burial-related temperature increase in the Outer Kwanza Basin. This source to sink correlation indicates a period of bypassed sedimentation into the Outer Kwanza Basin and possibly onto the abyssal plain of Angola. Keywords: Kwanza Basin, diagenesis, provenance, heavy minerals, fluid inclusion, microthermometry, AFTA, basin modelling, hydrocarbon charge.
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