Integrated single crystal laser ablation U/Pb and (U–Th)/He dating of detrital accessory minerals – Proof-of-concept studies of titanites and zircons from the Fish Canyon tuff

Horne, A.; Soest, M. C. van; Hodges, Kip; Tripathy-Lang, Alka; Hourigan, J. K.

doi:10.1016/j.gca.2015.11.044

Cited by 41 publications

(37 citation statements)

References 51 publications

(71 reference statements)

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“…Refinement of double-and triple-dating analytical procedures and expansion of these approaches to other detrital accessory phases is critical to this. For example, ongoing development of laser ablation (U-Th)/He thermochronometry and evaluation of method challenges will enable high sample throughput necessary for detrital studies in sedimentary rocks and modern drainage systems (e.g., Horne et al, 2016Horne et al, , 2019.…”

Section: 1029/2018tc005312mentioning

confidence: 99%

Innovations in (U–Th)/He, Fission Track, and Trapped Charge Thermochronometry with Applications to Earthquakes, Weathering, Surface‐Mantle Connections, and the Growth and Decay of Mountains

2019

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A transformative advance in Earth science is the development of low‐temperature thermochronometry to date Earth surface processes or quantify the thermal evolution of rocks through time. Grand challenges and new directions in low‐temperature thermochronometry involve pushing the boundaries of these techniques to decipher thermal histories operative over seconds to hundreds of millions of years, in recent or deep geologic time and from the perspective of atoms to mountain belts. Here we highlight innovation in bedrock and detrital fission track, (U–Th)/He, and trapped charge thermochronometry, as well as thermal history modeling that enable fresh perspectives on Earth science problems. These developments connect low‐temperature thermochronometry tools with new users across Earth science disciplines to enable transdisciplinary research. Method advances include radiation damage and crystal chemistry influences on fission track and (U–Th)/He systematics, atomistic calculations of He diffusion, measurement protocols and numerical modeling routines in trapped charge systematics, development of 4He/3He and new (U–Th)/He thermochronometers, and multimethod approaches. New applications leverage method developments and include quantifying landscape evolution at variable temporal scales, changes to Earth's surface in deep geologic time and connections to mantle processes, the spectrum of fault processes from paleoearthquakes to slow slip and fluid flow, and paleoclimate and past critical zone evolution. These research avenues have societal implications for modern climate change, groundwater flow paths, mineral resource and petroleum systems science, and earthquake hazards.

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Section: 1029/2018tc005312mentioning

confidence: 99%

Innovations in (U–Th)/He, Fission Track, and Trapped Charge Thermochronometry with Applications to Earthquakes, Weathering, Surface‐Mantle Connections, and the Growth and Decay of Mountains

2019

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“…The LADD method does not require an alpha ejection correction, and broken or noneuhedral grains can be analyzed (Tripathy‐Lang et al, 2013). The analytical procedures for zircon laser ablation (U‐Th)/He and U‐Pb analyses used in this study follow those of Horne et al (2016), who found that LADD methods yield results that are consistent with conventional whole‐crystal methods, but uncertainties are larger. The zircon grains were mounted in a puck using Torr Seal and then polished to erode 20–30 μm of the crystals.…”

Section: Methodsmentioning

confidence: 82%

Exhumation Timing in the Oregon Cascade Range Decoupled From Deformation, Magmatic, and Climate Patterns

et al. 2020

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The Cascade Range in the Pacific Northwest, USA, developed as an Eocene to recent volcanic arc along the Pacific/North American ocean-continent subduction zone. The volcanic arc is characterized by temporally and spatially variable magmatism. Crustal deformation that accompanied development of the arc transitions from N-S transpression in the Yakima Fold Belt and Puget lowland (western Washington, northern Oregon) to generally E-W transtension in the south (central and southern Oregon). Orography focuses precipitation along the western flank of the Cascade Range, whereas the eastern flank is relatively arid. We use the unique spatial variation in deformation, magmatic history, and orographic precipitation to investigate the contributions from tectonic and surface processes to rock uplift. We reconstruct the exhumation pathway of plutonic rocks throughout the Cascade Range by exploiting the unique juxtaposition of basalt-capped ridges above valleys exposing exhumed Cenozoic plutons. Multiple bedrock geochronometers and thermochronometers constrain the thermal history in six catchments along the Cascade arc from southern Oregon to southern Washington. U-Pb geochronology defines circa 10-24 Ma pluton crystallization ages. Apatite and zircon (U-Th)/He thermochronology ages range from circa 8-23 Ma. 40 Ar/ 39 Ar geochronology defines circa 5-8 Ma basalt emplacement. Our results reveal spatially and temporally variable shallow exhumation in the southern Washington and Oregon Cascades and that the timing of exhumation is earlier than circa 6-12 Ma exhumation previously reported in the Washington Cascades. Spatially and temporally variable exhumation highlights that crustal deformation plays a significant role in rock uplift in addition to erosional mass removal in concert with orographic precipitation. Plain Language Summary Geoscientists have long wondered whether slow, incremental plate tectonics that shapes our planet have direct impacts on Earth surface processes (like precipitation or erosion). More provocatively, could surface processes actually impact tectonics? Existing studies have provided a range of interpretations but often focus on places where intense precipitation (like the Indian monsoon) and deformation (the Himalaya) change spatially together. This makes it challenging to determine whether tectonics or climate is the main driver. We wanted to investigate this problem along the Cascade Range in Oregon and Washington, where precipitation and deformation patterns do not vary together, allowing us to disentangle the influence of surface and tectonic processes. We use geochronology and thermochronology to determine when rocks were exhumed from deep to shallow levels in the earth. This gave us clues on the timing of rock uplift. We hypothesized that if climate was the main driver, which is similar in the Cascades from north to south, the timing would be synchronized north to south. However, we found that the timing is variable along the Cascades. We conclude that the combination and interaction between tecto...

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“…The fields of detrital geochronology and thermochronology aim to identify the timing of crystallization and cooling of individual detrital mineral grains, respectively, with application to understanding both solid-earth (tectonic) and earth surface processes (Fedo, Sircombe, & Rainbird, 2003;Gehrels, 2012;Reiners & Brandon, 2006). Technological improvements over the last several decades, particularly in laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS), have led to greater efficiency in collecting detrital geochronologic data (Gehrels, 2014), and to a lesser extent thermochronologic data (Horne, van Soest, Hodges, Tripathy-Lang, & Hourigan, 2016). Although many detrital mineral types are used in geo-thermochronology, U-Pb and (U-Th)/He dating of detrital zircon (DZ) has emerged as a primary tool for constraining sediment provenance, refining palaeogeographic and tectonic interpretations, and constraining the depositional age of stratigraphic sequences (Fedo et al, 2003;Gehrels, 2014).…”

Section: Introductionmentioning

confidence: 99%

“…The trend towards a large-n sampling strategy (Daniels et al, 2017;Pullen, Ibáñez-Mejía, Gehrels, Ibáñez-Mejía, & Pecha, 2014) suggests that the quantity of detrital geochronologic data will continue to increase at a rapid pace. Although detrital thermochronologic datasets are typically smaller than their geochronologic counterparts, as a result of greater effort and expense of data collection, ongoing advances in He-dating using laser ablation shows promise in increasing the future quantity of detrital thermochronometric data (Horne et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

detritalPy: A Python‐based toolset for visualizing and analysing detrital geo‐thermochronologic data

Sharman

Sylvester

2018

The Depositional Record

193

101

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Detrital geochronology and thermochronology have emerged as primary methods of reconstructing the tectonic and surficial evolution of the Earth over geological time. Technological improvements in the acquisition of detrital geo‐thermochronologic data have resulted in a rapid increase in the quantity of published data over the past two decades, particularly for the mineral zircon. However, existing tools for visualizing and analysing detrital geo‐thermochronologic data generally lack flexibility for working with large datasets, hampering efforts to utilize the large quantity of available data.

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Integrated single crystal laser ablation U/Pb and (U–Th)/He dating of detrital accessory minerals – Proof-of-concept studies of titanites and zircons from the Fish Canyon tuff

Cited by 41 publications

References 51 publications

Innovations in (U–Th)/He, Fission Track, and Trapped Charge Thermochronometry with Applications to Earthquakes, Weathering, Surface‐Mantle Connections, and the Growth and Decay of Mountains

Innovations in (U–Th)/He, Fission Track, and Trapped Charge Thermochronometry with Applications to Earthquakes, Weathering, Surface‐Mantle Connections, and the Growth and Decay of Mountains

Exhumation Timing in the Oregon Cascade Range Decoupled From Deformation, Magmatic, and Climate Patterns

detritalPy: A Python‐based toolset for visualizing and analysing detrital geo‐thermochronologic data

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