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Petrochronology and Statistical Anal...

Harrigan, Claire Ostwald.

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Petrochronology and Statistical Analysis to Integrate Different Types of Data to Solve Complex Earth Systems Problems.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Petrochronology and Statistical Analysis to Integrate Different Types of Data to Solve Complex Earth Systems Problems./
作者:	Harrigan, Claire Ostwald.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2022,
面頁冊數:	258 p.
附註:	Source: Dissertations Abstracts International, Volume: 84-03, Section: B.
Contained By:	Dissertations Abstracts International84-03B.
標題:	Geochemistry. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29260000
ISBN:	9798351460550

Petrochronology and Statistical Analysis to Integrate Different Types of Data to Solve Complex Earth Systems Problems.
Harrigan, Claire Ostwald.

Petrochronology and Statistical Analysis to Integrate Different Types of Data to Solve Complex Earth Systems Problems. - Ann Arbor : ProQuest Dissertations & Theses, 2022 - 258 p.

Source: Dissertations Abstracts International, Volume: 84-03, Section: B.

Thesis (Ph.D.)--Boise State University, 2022.

This item must not be sold to any third party vendors.

Complex Earth systems problems, like reconstructing orogens and calibrating the geologic time scale, require investigations that link time to geologic processes. To use time as a means of organizing geologic evidence, geochronometric dates must be contextualized by integrating with different data types. This is the work of petrochronology-linking mineral ages to geochemical, textural, or other geologic information. The U-Pb isotopic system as preserved in the minerals zircon (ZrSiO4) and titanite (CaTiSiO5) can be used in a petrochronological context to date geologic events including the age of granitoid pluton emplacement, the age of rock fabric formation in deformed granitoids, and the age of volcanic ash beds.One focus of my dissertation was to use petrochronology to investigate high-temperature crustal strain partitioning and localization on the micro- to macro-scale using the western Idaho shear zone (WISZ), west-central Idaho. The WISZ is a crustal-scale structure that localized arc magmatic process and deformation related to terrane accretion and translation along the North American Cordillera. I used a WISZ orthogneiss to examine how fabric develops during high-temperature deformation on the micro-scale. By integrating the geochronometric, geochemical, and microstructural titanite record using statistical and petrologically-relevant visualizations, I document the local preservation of titanite related to magmatic and subsolidus processes. Importantly, this petrochronological workflow results in a date for the onset of deformation in the WISZ, confirming tectonic interpretations of WISZ deformation as a separate event from local terrane suturing.I expanded this work to the macro-scale with a suite of samples that transect the WISZ near McCall, Idaho to track the spatial-temporal patterns of pluton emplacement and deformation. My tandem zircon and titanite petrochronology results show that 1) the propensity of titanite to (re)crystallize in response to changes in pressure and temperature makes titanite petrochronology a useful approach for documenting subtle subsolidus fabric development, 2) strain localizes in time and space in response to local intrusions, and 3) WISZ fabric development is observed further east than previously mapped, causing the model of a west-to-east younging of pluton emplacement and deformation to be updated in favor of a model in which deformation focuses young magmatism within the center of the shear zone.In a second focus of my dissertation work, I integrated geochronology and statistical modeling to recalibrate and refine the Devonian time scale. The Devonian is a period in Earth history with significant biologic, climatic, and tectonic events. I dated Devonian ash beds using high-precision zircon geochronology and used those dates with a Bayesian age-depth model as the statistical framework to relate geochronometric and astrochronologic data to biostratigraphic data. I produced an updated Devonian time scale with new stage boundary ages with robust uncertainty estimates. This integrated stratigraphic approach is broadly applicable to time scale modeling.This work is united under a theme of using petrochronology and statistical modeling to link time to geologic processes including magmatism, deformation, and stratigraphic accumulation. Time constraints on the initiation and duration of geologic processes can deepen our understanding of the evolution of complex Earth systems.

ISBN: 9798351460550Subjects--Topical Terms:

539092
Geochemistry.
Subjects--Index Terms:

Devonian

Petrochronology and Statistical Analysis to Integrate Different Types of Data to Solve Complex Earth Systems Problems.
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100 1 $a Harrigan, Claire Ostwald. $3 3642130
245 1 0 $a Petrochronology and Statistical Analysis to Integrate Different Types of Data to Solve Complex Earth Systems Problems.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2022
300 $a 258 p.
500 $a Source: Dissertations Abstracts International, Volume: 84-03, Section: B.
500 $a Includes supplementary digital materials.
500 $a Advisor: Schmitz, Mark D.
502 $a Thesis (Ph.D.)--Boise State University, 2022.
506 $a This item must not be sold to any third party vendors.
520 $a Complex Earth systems problems, like reconstructing orogens and calibrating the geologic time scale, require investigations that link time to geologic processes. To use time as a means of organizing geologic evidence, geochronometric dates must be contextualized by integrating with different data types. This is the work of petrochronology-linking mineral ages to geochemical, textural, or other geologic information. The U-Pb isotopic system as preserved in the minerals zircon (ZrSiO4) and titanite (CaTiSiO5) can be used in a petrochronological context to date geologic events including the age of granitoid pluton emplacement, the age of rock fabric formation in deformed granitoids, and the age of volcanic ash beds.One focus of my dissertation was to use petrochronology to investigate high-temperature crustal strain partitioning and localization on the micro- to macro-scale using the western Idaho shear zone (WISZ), west-central Idaho. The WISZ is a crustal-scale structure that localized arc magmatic process and deformation related to terrane accretion and translation along the North American Cordillera. I used a WISZ orthogneiss to examine how fabric develops during high-temperature deformation on the micro-scale. By integrating the geochronometric, geochemical, and microstructural titanite record using statistical and petrologically-relevant visualizations, I document the local preservation of titanite related to magmatic and subsolidus processes. Importantly, this petrochronological workflow results in a date for the onset of deformation in the WISZ, confirming tectonic interpretations of WISZ deformation as a separate event from local terrane suturing.I expanded this work to the macro-scale with a suite of samples that transect the WISZ near McCall, Idaho to track the spatial-temporal patterns of pluton emplacement and deformation. My tandem zircon and titanite petrochronology results show that 1) the propensity of titanite to (re)crystallize in response to changes in pressure and temperature makes titanite petrochronology a useful approach for documenting subtle subsolidus fabric development, 2) strain localizes in time and space in response to local intrusions, and 3) WISZ fabric development is observed further east than previously mapped, causing the model of a west-to-east younging of pluton emplacement and deformation to be updated in favor of a model in which deformation focuses young magmatism within the center of the shear zone.In a second focus of my dissertation work, I integrated geochronology and statistical modeling to recalibrate and refine the Devonian time scale. The Devonian is a period in Earth history with significant biologic, climatic, and tectonic events. I dated Devonian ash beds using high-precision zircon geochronology and used those dates with a Bayesian age-depth model as the statistical framework to relate geochronometric and astrochronologic data to biostratigraphic data. I produced an updated Devonian time scale with new stage boundary ages with robust uncertainty estimates. This integrated stratigraphic approach is broadly applicable to time scale modeling.This work is united under a theme of using petrochronology and statistical modeling to link time to geologic processes including magmatism, deformation, and stratigraphic accumulation. Time constraints on the initiation and duration of geologic processes can deepen our understanding of the evolution of complex Earth systems.
590 $a School code: 1451.
650 4 $a Geochemistry. $3 539092
650 4 $a Petrology. $3 535210
650 4 $a Plate tectonics. $3 542702
653 $a Devonian
653 $a Geochronology
653 $a Statistical modeling
653 $a Titanite
653 $a Western Idaho shear zone
653 $a Zircon
690 $a 0996
690 $a 0584
690 $a 0592
710 2 $a Boise State University. $b Geosciences. $3 3642062
773 0 $t Dissertations Abstracts International $g 84-03B.
790 $a 1451
791 $a Ph.D.
792 $a 2022
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29260000