Proefschrift--Utrecht. / Three folded stereograms inserted. "Stellingen" ([2] p.) and errata slip inserted. Bibliography: p. 101-[105].

Thesis (Ph. D.)--University of Michigan, 1934. / "Reprinted from American mineralogist, vol. 21m no. 12, December, 1936." Includes bibliographical references. Also issued in print.

Thesis (Ph. D.)--University of Michigan, 1934. / "Reprinted from American mineralogist, vol. 21m no. 12, December, 1936." eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

Proefschrift--Utrecht. / Three folded stereograms inserted. "Stellingen" ([2] p.) and errata slip inserted. Bibliography: p. 101-[105].

Thesis (Ph.D.)--Aberdeen University, 2009. / Title from web page (viewed on Apr. 15, 2009). Includes bibliographical references.

Inaug.-Diss.--Kiel. / Description based on print version record. "Litteraturverzeichnis": p. 9-13.

The timing and duration of fluid flow through sedimentary basins is paramount to understanding basin evolution.  Episodes of fluid flow often deposit authigenic (low temperature) minerals around detrital grains and can result in the concentration of metalliferous deposits and hydrocarbons.  Although numerous studies have dated the growth of authigenic mineral phases in an attempt to date fluid flow, these studies have not been able to determine the properties of the fluids from which the minerals grew.  A new approach is therefore required which is capable of determining the temperature, salinity and composition of palaeo-fluids as well as resolving the timing and duration of fluid flow. Through analysis of authigenic K-feldspar cements using fluid inclusion petrography and microthermometry in conjunction with high-resolution UVLAMP Ar-Ar dating, this study has developed an integrated methodology capable of determining the parameters described above.  The methodology is outlined and through using core samples from the UK Atlantic Margin, the methodology was tested in a geologically complex area that has experienced several phases of rifting, basin-scale fluid flushing, magnetic intrusion and volcanic activity. The methodology was subsequently tested throughout the UK sector of the 480 Ma Laurentian Margin, a complex margin that has witnessed several phases of successive orogenesis. Although not intended as a definitive study of Ar-diffusion within authigenic K-feldspar, this research does provide a valuable data set from which discussion can begin.  Meaningful Ar-Ar ages were determined from authigenic K-feldspar which displays a subgrain microtexture.

Thesis (Ph. D.)--University of Wisconsin--Madison, 1953. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 76-89).

Thesis (Ph. D.)--University of Wisconsin--Madison, 1954. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Bibliography: leaves 92-94.

The zoning of plagioclase feldspars was studied with the four-axis universal stage. The composition, in terms of the extinction angle X’ʌ010, ⊥a, was measured for each zone in several crystals in each of nearly fifty rocks. The values of the extinction angles for each zone were plotted against the distance of the zone from the rim of the crystal, and the resulting zone-curves for each rock compared. . Three degrees of correlation between zone-curves are recognizable, and the rocks studied may be arbitrarily grouped on this basis as follows: 1. Rocks in which the correlation is poor or absent. These include lavas and some intrusive granites. 2. Rocks in which the correlation is good or perfect. These include hornfelses and, the foliated and gneissic metamorphic rocks. 3. Rocks in which the correlation is indefinite. This group, which contains only twelve percent of all the rocks studied, includes some intrusive granites and some foliated metamorphic rocks. The degree of mobility of magmas may be estimated. The mobility appears to be severely restricted by the continued growth of its feldspar phenocrysts, and by the confining walls of intruded country rock. The author concludes that extreme complexity and non-correlation of zoning are due to relative motion between growing crystals, and that these features are most common in magmatic rocks which have been thoroughly mixed during the fluid stage. He concludes further that simplicity and close correlation of zoning are due to the growth of crystals in a quiet, relatively undisturbed environment in which the crystals do not move relatively to one another. Finally, it is concluded that cyclic super saturation, as proposed by Hills, (1936), is a less important cause of plagioclase zoning than changing pressure-temperature environments due to mixing or turbulence. / Science, Faculty of / Earth, Ocean and Atmospheric Sciences, Department of / Graduate