linking earth’s mantle to water quality and unique ......linking earth’s mantle to water quality...
TRANSCRIPT
![Page 1: Linking Earth’s mantle to water quality and unique ......Linking Earth’s mantle to water quality and unique microbial ecosystems Laura Crossey & Karl Karlstrom Dept. of Earth &](https://reader034.vdocuments.us/reader034/viewer/2022050509/5f9a13b005d7e50e10242469/html5/thumbnails/1.jpg)
ES CP-RGR Interp. Wksp – L. Crossey
Linking EarthEarth’’s mantle s mantle to water qualitywater quality andunique microbial ecosystemsunique microbial ecosystems
Laura Crossey &Karl KarlstromDept. of Earth & PlanetarySciences
withCristina Takacs-Vesbach, DianaNorthup, Cliff Dahm, DaveHilton, Tobias Fischer, andStudents: Dennis Newell, MattKirk, Eileen Embid, BrandiCron, Ara Kooser
Science funding by NSF Hydrologic Sciencesand Continental Dynamics
Springs, Travertines, Xenowhiffs andContinental Smokers
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ES CP-RGR Interp. Wksp – L. Crossey
We recognize that plate tectonic theory providesexplanations for observations about volcanism
Example:Topographic expressionand age progression ofHawaii and EmporerSeamount chain in thePacific.
![Page 3: Linking Earth’s mantle to water quality and unique ......Linking Earth’s mantle to water quality and unique microbial ecosystems Laura Crossey & Karl Karlstrom Dept. of Earth &](https://reader034.vdocuments.us/reader034/viewer/2022050509/5f9a13b005d7e50e10242469/html5/thumbnails/3.jpg)
ES CP-RGR Interp. Wksp – L. Crossey
Example:Topographic expressionand age progression ofColumbia River basalts,Snake River Plain andYellowstone in thewestern U.S.
We recognize that plate tectonic theory providesexplanations for observations about volcanism
![Page 4: Linking Earth’s mantle to water quality and unique ......Linking Earth’s mantle to water quality and unique microbial ecosystems Laura Crossey & Karl Karlstrom Dept. of Earth &](https://reader034.vdocuments.us/reader034/viewer/2022050509/5f9a13b005d7e50e10242469/html5/thumbnails/4.jpg)
ES CP-RGR Interp. Wksp – L. Crossey
Example:Topographic expressionand age progression ofColumbia River basalts,Snake River Plain andYellowstone in thewestern U.S.
We recognize that plate tectonic theory providesexplanations for observations about volcanism
![Page 5: Linking Earth’s mantle to water quality and unique ......Linking Earth’s mantle to water quality and unique microbial ecosystems Laura Crossey & Karl Karlstrom Dept. of Earth &](https://reader034.vdocuments.us/reader034/viewer/2022050509/5f9a13b005d7e50e10242469/html5/thumbnails/5.jpg)
ES CP-RGR Interp. Wksp – L. Crossey
Earthscope helps us understand major materialtransfers from deep-earth to surface.
But what about OTHER fluids?
Photo: Gary Ladd
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ES CP-RGR Interp. Wksp – L. Crossey
A tectonic/fluid/biological connection
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ES CP-RGR Interp. Wksp – L. Crossey
Connecting mantleprocesses to groundwater-research approach
Tale of a Dissected Aquifer: Grand Canyon travertines(aka tufas!)
Xenowhiffs (foreign gases entrained in the hydrologic system):what they tell us about neotectonism
Active mantle degassing of the western US- implications forwater quality and groundwater management
Continental Smokers- Spring mounds and geomicrobiology
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ES CP-RGR Interp. Wksp – L. Crossey
CO2 – rich springs and travertines (including‘mound springs’) are connected…’freshwater’limestone
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H2O + CO2 + CaCO3
Ca2+ + 2HCO3- CaCO3 + CO2 + H2O
(solute acquisition)
(deposition)(solute transport)
Possible CO2 sourcesatmospheresoil respirationmantle degassingcrustal sources
} ‘Upper World’ sources
} ‘Lower World’ sources
What is the origin of CO2 necessary for such massive travertines?
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ES CP-RGR Interp. Wksp – L. Crossey
Hot and Not so hot Marine ‘Black’ Smokers andContinental ‘Smokers’: Key Comparisons
Proximal magmatic settings:
High geothermal gradients (thermal- to hyperthermophiles: ‘life zone’ greatly compressed)Pressures range from high hydrostatic (marine) to extremely variable (fumarolic systems)Extreme chemical gradientsPresence of high CO2 and H2, H2S, CH4…. anaerobic to microaerophilic conditions
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ES CP-RGR Interp. Wksp – L. Crossey
Hot and Not so hot Marine ‘Black’ Smokers andContinental ‘Smokers’: Key Comparisons
Proximal magmatic settings:
High geothermal gradients (thermal- to hyperthermophiles: ‘life zone’ greatly compressed)Pressures range from high hydrostatic (marine) to extremely variable (fumarolic systems)Extreme chemical gradientsPresence of high CO2 and H2, H2S, CH4…. anaerobic to microaerophilic conditions
![Page 12: Linking Earth’s mantle to water quality and unique ......Linking Earth’s mantle to water quality and unique microbial ecosystems Laura Crossey & Karl Karlstrom Dept. of Earth &](https://reader034.vdocuments.us/reader034/viewer/2022050509/5f9a13b005d7e50e10242469/html5/thumbnails/12.jpg)
ES CP-RGR Interp. Wksp – L. Crossey
Hot and Not so hot Marine ‘Black’ Smokers andContinental ‘Smokers’: Key Comparisons
Proximal magmatic settings:
High geothermal gradients (thermal- to hyperthermophiles: ‘life zone’ greatly compressed)Pressures range from high hydrostatic (marine) to extremely variable (fumarolic systems)Extreme chemical gradientsPresence of high CO2 and H2, H2S, CH4…. anaerobic to microaerophilic conditions
Extensional tectonic settings in general:
Ambient to moderate geothermal gradients (mesothermophiles: ‘life zone’ greatly expanded)Pressures range from atmospheric to moderate hydrostaticExtreme chemical gradientsPresence of high CO2 and H2, H2S, CH4…. anaerobic to microaerophilic conditions
Photo: Dennis Newell
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ES CP-RGR Interp. Wksp – L. Crossey
CO2 – rich springs and travertines (including‘mound springs’) are a manifestation of significantand persistent Earth outgassing along faults
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ES CP-RGR Interp. Wksp – L. Crossey
Montezuma Well, AZGlenwood Springs, CO
The Pagosa, CO
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ES CP-RGR Interp. Wksp – L. CrosseyFrom Embid et al., in prep.
Mound springs andcarbonates ofSpringerville, AZ
Photo: L. Crumpler
Travertines as chemical volcanoes
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ES CP-RGR Interp. Wksp – L. Crossey
Geology: Not just rocks…It’s a gas!
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ES CP-RGR Interp. Wksp – L. Crossey
0.1 – 2.1ColoradoRocky Mtns
0.3 – 1.16Verde ValleyArizona
TransitionZone
0.07 – 1.2Grand CanyonColoradoPlateau
0.11 – 6.0Central New
MexicoRio Grande
Rift
3He/4He (Rc)LocationRegion
Mantle-derived helium present in CO2-spring waters
Montezuma Well, AZ
LCR, AZ
Cool CO2-rich spring mounds of theRio Grande rift, NM
Steamboat Springs, CO
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ES CP-RGR Interp. Wksp – L. Crossey
CO2 Springs and Mantle Degassing
Crossey et al., 2009, GSA Bull.
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ES CP-RGR Interp. Wksp – L. Crossey
Travertines of Grand Canyon are linked to other indications of mantle tectonism inthe region: Late Quaternary volcanism
See Karlstrom et al., 2007 (GSAB), Crow et al.,2008 (Geosphere), and Karlstrom et al.,2008 (Geology) for neotectonic incision story of Grand Canyon
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ES CP-RGR Interp. Wksp – L. Crossey
Hydrologic model for the Colorado Plateau
from Crossey et al., GSAB, 2009
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ES CP-RGR Interp. Wksp – L. Crossey
Elements of a Continental Smoker: Example--Rio Grande rift
Upwelling asthenosphere
Thinned crust
Heat+fluid conveyed with asthenospheric-derivedbasaltic magma through lithospheric mantle
seismicity andnormal faulting
Travertine&CO2-rich springs(and GW inputs)
Unique microbial communities
Crossey et al., in prep
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The Trail of Time at Grand Canyon:Using Teachable Moments
Laura J. Crossey & Karl KarlstromUniversity of New Mexicowith Steve Semken, ASU
Mike Williams, UMass
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What IS the Trail of Time? The BIG idea….
The Trail of Time is an interpretive walkingtimeline trail that focuses on Grand Canyonvistas and rocks to guide visitors to ponder,explore, and understand the magnitude ofgeologic time and the stories encoded byGrand Canyon rock layers and landscapes.
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The World’s Largest Geoscience Exhibition at theWorld’s Grandest Geologic Landscape
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Location Location Location!Prime Real Estate- The Rim Trail–
An NSF-funded ISE (Informal Science Education) Program ($2.3M for 2006-2010) to K. Karlstrom & L. Crossey, UNM
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The heart of the Trail of Time is a set of bronze time markings:small markings every meter (one for each million years) and labeled
time markings every tenth meter– 2,000 markers!You’ll always know “when” you are along the timeline
Elements of the Trail of Time- Main Trail
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Trail of Time at Grand Canyonexpected opening Summer/Fall 2010
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Bogus 2D graph of visitor Intelligence vs. Ignorance
Education +/- Ignorance level
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Targeting Geologic Audiences:
“aim at 6th grade comprehension” common approach
From Ted Fremd, 2005 [email protected]
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Bogus 2D graph of visitor Intelligence vs. Ignorance
Education +/- Ignorance level
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Targeting Geologic Audiences:
“experts” approach favored by scientists
From Ted Fremd, 2005 [email protected]
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Bogus 2D graph of visitor Intelligence vs. Ignorance
Education +/- Ignorance level
0 2 4 6 8 10
Inte
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Targeting Geologic Audiences:
“lowest common denominator” approach
From Ted Fremd, 2005 [email protected]
![Page 31: Linking Earth’s mantle to water quality and unique ......Linking Earth’s mantle to water quality and unique microbial ecosystems Laura Crossey & Karl Karlstrom Dept. of Earth &](https://reader034.vdocuments.us/reader034/viewer/2022050509/5f9a13b005d7e50e10242469/html5/thumbnails/31.jpg)
Bogus 2D graph of visitor Intelligence vs. Ignorance
Education +/- Ignorance level
0 2 4 6 8 10
Inte
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Targeting Geologic Audiences:
“get everybody with multiple layers of info” approach
Toddlers &Administrators
Researchers
ParkInterpreters
Mom, Dad,Buddy & Sis
From Ted Fremd, 2005 [email protected]
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Link the NSF-supporteduniversity researchers…
… to theNational ParkService…
… to the 5 million visitors!