Understanding provenance signatures in active margin settings : modern central California and the the magallanes-austral foreland basin, Southern Patagonia
Abstract/Contents
- Abstract
- From plate tectonics that act over thousands of kilometers and millions of years to sedimentary processes that operate over sub meter and sub annual timescales, provenance data integrates many types of information. The research in this dissertation attempts to advance the understanding of tectonic and sedimentological controls on provenance analysis by examining one modern and one ancient example. The modern example, coastal central California provides the advantage of being a well-studied modern setting for which boundary conditions of source region geology and sediment dispersal patterns are constrained. In the ancient example, the Magallanes-Austral retroarc foreland basin in southern Patagonia, considerable initial work was required to constrain the stratigraphic framework of the basin before provenance patterns and sediment dispersal could be examined in detail. Chapter 1 explores sediment dispersal off the modern coast of central California in an attempt to determine how sediment pathway partitioning and sediment mixing control the expression of provenance signatures. This chapter demonstrates that sediment mixing in the marine realm is an important control on provenance signatures and that submarine canyons and coastal geometries dictate the way sediment dispersal systems are partitioned along narrow-shelf margins. Chapter 2 provides a stratigraphic framework for the Magallanes-Austral foreland basin through field mapping and detrital zircon maximum depositional age calculations. This framework provides the first radiometrically-age-controlled, unified, framework for the basin between 49.5⁰S and 52⁰S. The focus of the chapter is constraining the age of the Cerro Fortaleza Formation. This unit had previously been assigned ages ranging from Cenomanian to Maastrichtian. Using detrital zircon maximum depositional ages we constrain the age of the unit to Campanian to Maastrichtian. Refining the age of this unit allows the rest of the stratigraphic framework of the basin to be defined. Chapter 3 is a provenance analysis of the Magallanes-Austral retroarc foreland basin that incorporates previously published provenance data from the basin along with 28 new detrital zircon and 34 new sandstone petrography samples. This analysis is informed by the systematic incorporation of geologic background information with an attempt made to describe sediment dispersal patterns from the whole-basin scale down to individual sediment dispersal systems.
Description
| Type of resource | text |
|---|---|
| Form | electronic resource; remote; computer; online resource |
| Extent | 1 online resource. |
| Place | California |
| Place | [Stanford, California] |
| Publisher | [Stanford University] |
| Copyright date | 2018; ©2018 |
| Publication date | 2018; 2018 |
| Issuance | monographic |
| Language | English |
Creators/Contributors
| Author | Sickmann, Zachary Thomas |
|---|---|
| Degree supervisor | Graham, S. A. (Stephan Alan), 1950- |
| Thesis advisor | Graham, S. A. (Stephan Alan), 1950- |
| Thesis advisor | Grove, Marty, 1958- |
| Thesis advisor | Lowe, Donald R, 1942- |
| Degree committee member | Grove, Marty, 1958- |
| Degree committee member | Lowe, Donald R, 1942- |
| Associated with | Stanford University, Department of Geological and Environmental Sciences. |
Subjects
| Genre | Theses |
|---|---|
| Genre | Text |
Bibliographic information
| Statement of responsibility | Zachary Thomas Sickmann. |
|---|---|
| Note | Submitted to the Department of Geological and Environmental Sciences. |
| Thesis | Thesis Ph.D. Stanford University 2018. |
| Location | electronic resource |
Access conditions
- Copyright
- © 2018 by Zachary Thomas Sickmann
- License
- This work is licensed under a Creative Commons Attribution Non Commercial 3.0 Unported license (CC BY-NC).
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