Chemical characteristics of ground-water discharge along the south rim of Grand Canyon in Grand Canyon National Park, Arizona, 2000-2001

Abstract

Map showing surficial geology, geologic structure, and chemical characteristics of ground-water discharge at selected springs and creeks along the south rim

A proposed Laramide proto-Grand Canyon

“…However, also possible is a proto-Grand Canyon river that could have supplied higher strontium-ratio carbonate to the Claron Formation in its southeastern part (where we sampled). If the higher strontium values of Redwall aquifer water are mixed with Kaibab Limestone values (∼ 0.709; Monroe et al, 2005), then the intermediate 87 Sr/ 86 Sr values measured for the Claron may reflect a contribution of a proto-Grand Canyon drainage system into the Claron basin.…”

Biogeography Of Aquatic And Semiaquatic Heteroptera In the Grand Canyon Ecoregion, Southwestern USA

“…Few springs in the eastern GC basin are warmer than 19°C, primarily because the region's highelevation plateaus provide cool groundwater recharge, and many groundwater flowpaths there are relatively short (Monroe et al 2005); however, Monroe et al (2005) reported several warmwater springs emanating from the South Rim of GC with groundwater residence times exceeding 3000 years. Most GC springs emerge either as contact-hanging-gardens springs (vertical habitats that support few ASH taxa) or in structurally controlled channels that are regularly scoured by floods (Springer et al 2006).…”

Geochemistry and hydrology of perched groundwater springs: assessing elevated uranium concentrations at Pigeon Spring relative to nearby Pigeon Mine, Arizona (USA)

“…The Big Springs and Muav Faults displace the Fig. 6 Strontium isotope ratio relative to 1/strontium concentration for spring samples; values from rock samples in Bills et al 2007 andMonroe et al 2005 uplifted area of the Kaibab Plateau from the western portion of our study area including Snake Gulch. Several springs discharge along the Big Springs Fault (Warm, Oak, Tilton, Mangum and Big springs); however, there is no perennial surface water flowing away from these springs, which indicates that the water discharging at the springs may then reinfiltrate into the subsurface.…”