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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 Peak Mining District
Detailed Information
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202103007
- ISBN
- 9798263305666
- DDC
- 551
- 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
- Animas River
- 키워드
- Cement Creek
- 키워드
- Stable isotopes
- 기타저자
- Colorado School of Mines Geology and Geological Engineering
- 기본자료저록
- Dissertations Abstracts International. 87-05B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
008260126s2025 us c eng d■001000017356637
■00520260202103007
■006m o d
■007cr#unu||||||||
■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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