Cosmogenic depth profile dating

Knowledge graph centered on Cosmogenic depth profile dating with 13 nodes and 35 connections. Top connected: Gothic, Crested Butte, Washington Gulch, Copper Creek, Schofield Pass.

Method synopsis

Depth profile sampling and analysis to constrain erosion rates and inheritance using cosmogenic ¹⁰Be concentrations at different depths below surface. Uses Monte Carlo modeling to determine exposure age and erosion parameters.

Synthesized from method descriptions across 1 paper using this protocol.

Procedure from a recent peer-reviewed implementation

Steps below were extracted from the most recent peer-reviewed implementation of this protocol in the corpus — Latest Pleistocene glacial chronology and paleoclimate reconstruction for the East River watershed, Colorado, USA (2024), Quaternary Research. Implementations in other papers (listed below) may differ.

1. ¹⁰Be measurement
   ¹⁰Be fraction isolated using ion chromatography and chemically isolated using procedures of Ditchburn and Whitehead (1994) and Stone (2001). Samples heated in quartz crucible with gas torch until BeO glowed orange for 1 minute, then packed with Nb powder into targets for measurement by accelerator mass spectrometry.
   Quantities: ¹⁰Be/⁹Be ratios measured against AMS standard 07KNSTD with known ratio of 2.85 × 10⁻¹²Duration: Not specifiedConditions: Lawrence Livermore National Laboratory
   Equipment: quartz crucible, gas torch, accelerator mass spectrometer
2. Depth profile sampling
   Collected five samples from soil pit on Gothic moraine for in situ cosmogenic ¹⁰Be measurements. Bulk density measurements collected from 25–145 cm below moraine crest surface.
   Quantities: 5 samples from single soil pit, depths 25–145 cm below surfaceDuration: Not specifiedConditions: Gothic moraine site
   Equipment: soil sampling tools

Typical Equipment

• soil sampling tools
• accelerator mass spectrometer

Output Measurements

• erosion rates
• exposure ages
• inheritance values

Papers Using This Protocol (1)

Places Where Used