Author: Stephen Paul RowePublisher:
ISBN:
Category :
Languages : en
Pages : 634
Book Description
Zircon Fission-track Age Relations and Implications for the Mesozoic Thermal History of the Northern Sierra Nevada, California
Author: Stephen Paul RoweGeologic Excursions from Fresno, California, and the Central Valley: A Tour of Californias Iconic Geology
Author: Keith Daniel PutirkaPublisher: Geological Society of America
ISBN: 0813700329
Category : Science
Languages : en
Pages : 172
Book Description
"This volume presents field guides that span the breadth of central California's geology. The trips are associated with the 2013 GSA Cordilleran Section meeting, convened in Fresno, California, 18-25 May. The guides are to geologic localities that are not only iconic, but are also type examples of key geologic phenomena"--Provided by publisher.
Index to Graduate Theses and Dissertations on California Geology, 1990 Through 1997
Author: Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 96
Book Description
From Terranes to Terrains
Author: Adam M. BoothPublisher: Geological Society of America
ISBN: 0813700620
Category : Science
Languages : en
Pages :
Book Description
Masters Theses in the Pure and Applied Sciences Accepted by Colleges and Universities of the United States and Canada
Author: Fission-Track Dating
Author: G. WagnerPublisher: Springer Science & Business Media
ISBN: 9401124787
Category : Science
Languages : en
Pages : 440
Book Description
Fission track dating is based on the microscopic observation and counting of etchable tracks left by the spontaneous fission of uranium in minerals. Since its development in 1963 the method attracted a steadily growing interest from geologists and geochronologists throughout the world. Apart from its relative experimental ease the success must be mainly ascribed to the specific ability of the method of unravelling the thermal and tectonic history of rocks, a potential which only became fully exploited during the last decade with the systematic introduction of track size analysis. The present work is the first one to deal entirely with fission track dating covering all of its aspects from the origin of the fission tracks, the basis of track etching and fading, the various dating techniques as well as practical procedures and the geologic interpretation to the most recent applications in geology and archaeology.
Late Jurassic Margin of Laurasia—A Record of Faulting
Author: Thomas H. AndersonPublisher: Geological Society of America
ISBN: 0813725135
Category : Science
Languages : en
Pages : 629
Book Description
"The objective of this volume is to characterize geologic relationships and settings at the margin of the Laurasia plate from Middle Jurassic to the Early Cretaceous, overlapping the time of the opening of the central Atlantic basin, with the intent of assessing the compatibility of the features with contemporaneous, sinistral fault movement"--Introduction, page v.
Publications of the Geological Survey
Author: Geological Survey (U.S.)Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 452
Book Description
Development and Application of Geochronometric Techniques to the Study of Sierra Nevada Uplift and the Dating of Authigenic Sediments
Author: Mary Robinson CecilPublisher:
ISBN:
Category :
Languages : en
Pages : 352
Book Description
This dissertation contains studies that use various geochronometric and thermochronometric techniques to better understand the post-magmatic evolution of Sierra Nevada, California. (U-Th)/He ages in apatite and zircon from Sierran batholithic rocks are used to constrain the Cenozoic exhumation of the northern part of the range. Zircon and apatite ages determined from the same samples revealed relatively rapid cooling and exhumation rates (0.2 - 0.8 km/My) from ̃90 to 60 Ma, followed by tectonic quiescence and slow exhumation (0.02 - 0.04 km/My) from the late Paleocene to present. In addition to the thermochronology of basement lithologies, the detrital zircon geochronology of grains from preserved Eocene fluvial sediments in the central and northern Sierra Nevada was performed. U-Pb ages of detrital zircons from the deposits were found to have distributions closely matching age-area estimates of Mesozoic plutons in the Sierra Nevada, suggesting that Eocene river systems were draining local Sierran catchments and likely had steeper axial gradients than has been proposed. Provenance analysis of the Eocene sediments is used to provide constraints on the paleotopography of the Sierra Nevada and inferred range-wide Cenozoic uplift. In addition to the Sierra Nevada work, this dissertation also contains studies that focus on the development of the K-Ca system as a geochronometric technique suitable for dating the deposition of sedimentary sequences. We present a new method for measuring Ca isotopic ratios using a multi-collector ICP-MS equipped with a hexapole collision cell. Isobaric argon interferences are minimized via gas phase reactions in the collision cell. The reproducibility of Ca ratio measurements is found to be ̃0.02 % (RSD), which is comparable to high precision TIMS techniques and an order of magnitude improvement over single collector ICP-MS techniques using a similar reaction cell method. K-Ca ages of glauconite and K-rich evaporites are determined in order to evaluate the usefulness of the K-Ca system as a sedimentary geochronometer. K-Ca ages in both glauconite and K-salts are found to be variable and significantly younger than documented depositional ages. Reported ages, however, are thought to be recording important basinal thermal histories and recrystallization events.
Fission-Track Thermochronology and its Application to Geology
Author: Marco G. MalusàPublisher: Springer
ISBN: 3319894218
Category : Science
Languages : en
Pages : 395
Book Description
This book is focused on the basics of applying thermochronology to geological and tectonic problems, with the emphasis on fission-track thermochronology. It is conceived for relatively new practitioners to thermochronology, as well as scientists experienced in the various methods. The book is structured in two parts. Part I is devoted to the fundamentals of the fission-track method, to its integration with other geochronologic methods, and to the basic principles of statistics for fission-track dating and sedimentology applied to detrital thermochronology. Part I also includes the historical development of the technique and thoughts on future directions. Part II is devoted to the geological interpretation of the thermochronologic record. The thermal frame of reference and the different approaches for the interpretation of fission-track data within a geological framework of both basement and detrital studies are discussed in detail. Separate chapters demonstrate the application of fission-track thermochronology from various perspectives (e.g., tectonics, petrology, stratigraphy, hydrocarbon exploration, geomorphology), with other chapters on the application to basement rocks in orogens, passive continental margins and cratonic interiors, as well as various applications of detrital thermochronology.