Anthropogenic influences on dissolved organic matter transport in high arsenic groundwater: Insights from stable carbon isotope analysis and electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry

2020 ◽  
Vol 708 ◽  
pp. 135162
Author(s):  
Kai Yu ◽  
Yanhua Duan ◽  
Yiqun Gan ◽  
Yanan Zhang ◽  
Ke Zhao
Keyword(s):  
Stable Carbon Isotope ◽  
Isotope Analysis ◽  
Ion Cyclotron Resonance ◽  
Anthropogenic Influences ◽  
Electrospray Ionization Fourier Transform ◽  
Stable Carbon Isotope Analysis ◽  
Matter Transport ◽  
High Arsenic ◽  
High Arsenic Groundwater ◽  
Organic Matter Transport

Evidence for a winter-snowpack derived water source for the Fremont maize farmers of Range Creek Canyon, Utah, USA

The Holocene ◽  
2021 ◽  
Vol 31 (3) ◽  
pp. 446-456
Author(s):  
Isaac Alfred Hart ◽  
Joan Brenner-Coltrain ◽  
Shannon Boomgarden ◽  
Andrea Brunelle ◽  
Larry Coats ◽  
...  
Keyword(s):  
Stable Carbon Isotope ◽  
Isotope Analysis ◽  
Summer Precipitation ◽  
Water Source ◽  
Sediment Geochemistry ◽  
Tree Ring Chronology ◽  
Wet Meadow ◽  
Maize Agriculture ◽  
Stable Carbon Isotope Analysis ◽  
Dry Farming

We present results of multiproxy analysis of a sediment core collected from Billy Slope Meadow, a spring-fed wet meadow in Range Creek Canyon, Utah. Range Creek Canyon was the home to Fremont maize farmers between roughly 1200 and 800 cal BP (AD 750–1150). Stable carbon isotope analysis of core sediments from Billy Slope Meadow indicate the Billy Slope Meadow site was used as a field for maize agriculture during that time. Some scholars have suggested the florescence of the Fremont culture may have been driven by increased summer precipitation, which improved the economic profitability of dry farming maize. But analysis of pollen, macroscopic charcoal and sediment geochemistry from Billy Slope Meadow, and a comparison with a local tree-ring chronology indicate the Fremont period in Range Creek Canyon was probably marked by reduced summer precipitation, and not an invigorated monsoon. The Fremont maize farmers of Range Creek Canyon therefore likely used winter snowpack-derived water from Range Creek for maize agriculture. This observation has significant implications, as using creek water rather than direct precipitation and runoff necessitates the construction of dams irrigation infrastructure, limited evidence for which has been reported by archaeologists working in the Fremont region.

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