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Multi-Scale Evaluation of Groundwater Flow and Metal Sourcing to Streams in the Bonita Peak Mining District
Multi-Scale Evaluation of Groundwater Flow and Metal Sourcing to Streams in the Bonita Pea...
Multi-Scale Evaluation of Groundwater Flow and Metal Sourcing to Streams in the Bonita Peak Mining District

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자료유형  
 학위논문 서양
최종처리일시  
20260202103007
ISBN  
9798263305666
DDC  
551
저자명  
Newman, Connor P.
서명/저자  
Multi-Scale Evaluation of Groundwater Flow and Metal Sourcing to Streams in the Bonita Peak Mining District
발행사항  
[Sl] : Colorado School of Mines, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
159 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-05, Section: B.
주기사항  
Advisor: Navarre-Sitchler, Alexis.
학위논문주기  
Thesis (Ph.D.)--Colorado School of Mines, 2025.
초록/해제  
요약Hydrologic and geochemical processes associated with acid mine drainage that result in the weathering of sulfide minerals and fluxes of metals to streams vary through space and time. Remediation of former mine sites relies on appropriate recognition and quantification of these changing processes. The need for both conceptual and quantitative understanding is particularly acute in headwater streams because these watersheds generate much of the water essential for ecosystem function and downstream human use, and headwater regions may be particularly sensitive to climatic changes. This research focuses on the Upper Animas River watershed in southwestern Colorado, a region substantially affected by historical mining over the past nearly 150 years to identify processes governing groundwater recharge and movement to streams, and associated metal weathering and fluxes, that operate over orders of magnitude in spatial and temporal extent. The three primary conclusions of this research are 1) metals are sourced from weathering of mineral deposits at depth (500 meters below ground surface) and are transported long distances (multiple kilometers) by deep groundwater flow paths that terminate at springs and draining mines; 2) groundwater flow paths were modified by emplacement of hydraulic bulkheads resulting in new mineral equilibrium controls within the subsurface and a net decrease in iron and zinc export from the watershed; and 3) the solute budget of streams is controlled by discharge and metal fluxes from multiple distinctive groundwater systems with unique geochemical compositions and timescales of response to climatic perturbations. These results illustrate that groundwater flow, groundwater/surface-water interactions, and metal fluxes vary over spatial extents ranging from meters to multiple kilometers and on timescales ranging from days to decades. Data collection and modeling approaches that account for dynamic systems over these ranges of spatial and temporal extent are necessary when studying mountain headwater regions.
일반주제명  
Geochemistry
일반주제명  
Hydrologic sciences
일반주제명  
Geology
키워드  
Acid mine drainage
키워드  
Animas River
키워드  
Cement Creek
키워드  
Groundwater discharge
키워드  
Stable isotopes
기타저자  
Colorado School of Mines Geology and Geological Engineering
기본자료저록  
Dissertations Abstracts International. 87-05B.
전자적 위치 및 접속  
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MARC

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■020    ▼a9798263305666
■035    ▼a(MiAaPQ)AAI31841719
■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a551
■1001  ▼aNewman,  Connor  P.
■24510▼aMulti-Scale  Evaluation  of  Groundwater  Flow  and  Metal  Sourcing  to  Streams  in  the  Bonita  Peak  Mining  District
■260    ▼a[Sl]▼bColorado  School  of  Mines▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a159  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-05,  Section:  B.
■500    ▼aAdvisor:  Navarre-Sitchler,  Alexis.
■5021  ▼aThesis  (Ph.D.)--Colorado  School  of  Mines,  2025.
■520    ▼aHydrologic  and  geochemical  processes  associated  with  acid  mine  drainage  that  result  in  the  weathering  of  sulfide  minerals  and  fluxes  of  metals  to  streams  vary  through  space  and  time.  Remediation  of  former  mine  sites  relies  on  appropriate  recognition  and  quantification  of  these  changing  processes.  The  need  for  both  conceptual  and  quantitative  understanding  is  particularly  acute  in  headwater  streams  because  these  watersheds  generate  much  of  the  water  essential  for  ecosystem  function  and  downstream  human  use,  and  headwater  regions  may  be  particularly  sensitive  to  climatic  changes.  This  research  focuses  on  the  Upper  Animas  River  watershed  in  southwestern  Colorado,  a  region  substantially  affected  by  historical  mining  over  the  past  nearly  150  years  to  identify  processes  governing  groundwater  recharge  and  movement  to  streams,  and  associated  metal  weathering  and  fluxes,  that  operate  over  orders  of  magnitude  in  spatial  and  temporal  extent.  The  three  primary  conclusions  of  this  research  are  1)  metals  are  sourced  from  weathering  of  mineral  deposits  at  depth  (500  meters  below  ground  surface)  and  are  transported  long  distances  (multiple  kilometers)  by  deep  groundwater  flow  paths  that  terminate  at  springs  and  draining  mines;  2)  groundwater  flow  paths  were  modified  by  emplacement  of  hydraulic  bulkheads  resulting  in  new  mineral  equilibrium  controls  within  the  subsurface  and  a  net  decrease  in  iron  and  zinc  export  from  the  watershed;  and  3)  the  solute  budget  of  streams  is  controlled  by  discharge  and  metal  fluxes  from  multiple  distinctive  groundwater  systems  with  unique  geochemical  compositions  and  timescales  of  response  to  climatic  perturbations.  These  results  illustrate  that  groundwater  flow,  groundwater/surface-water  interactions,  and  metal  fluxes  vary  over  spatial  extents  ranging  from  meters  to  multiple  kilometers  and  on  timescales  ranging  from  days  to  decades.  Data  collection  and  modeling  approaches  that  account  for  dynamic  systems  over  these  ranges  of  spatial  and  temporal  extent  are  necessary  when  studying  mountain  headwater  regions.
■590    ▼aSchool  code:  0052.
■650  4▼aGeochemistry
■650  4▼aHydrologic  sciences
■650  4▼aGeology
■653    ▼aAcid  mine  drainage
■653    ▼aAnimas  River
■653    ▼aCement  Creek
■653    ▼aGroundwater  discharge
■653    ▼aStable  isotopes
■690    ▼a0996
■690    ▼a0388
■690    ▼a0372
■71020▼aColorado  School  of  Mines▼bGeology  and  Geological  Engineering.
■7730  ▼tDissertations  Abstracts  International▼g87-05B.
■790    ▼a0052
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17356637▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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