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Tectonic, Magmatic, and Sedimentary Interactions in Extensional Settings: Insights From the Afar Depression, Ethiopia and Pinacate Volcanic Field, Mexico
Tectonic, Magmatic, and Sedimentary Interactions in Extensional Settings: Insights From the Afar Depression, Ethiopia and Pinacate Volcanic Field, Mexico
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202105317
- ISBN
- 9798265462213
- DDC
- 551
- 저자명
- Chupik, Daniel.
- 서명/저자
- Tectonic, Magmatic, and Sedimentary Interactions in Extensional Settings: Insights From the Afar Depression, Ethiopia and Pinacate Volcanic Field, Mexico
- 발행사항
- [Sl] : Arizona State University, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 365 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-06, Section: B.
- 주기사항
- Advisor: Arrowsmith, Ramon;Campisano, Christopher.
- 학위논문주기
- Thesis (Ph.D.)--Arizona State University, 2025.
- 초록/해제
- 요약Extensional tectonic settings, exemplified by the Afar Depression (AD) triple junction in Ethiopia and the Basin and Range Province of southwestern North America, create favorable conditions for fluviolacustrine basin development and the formation of volcanic fields. Normal faulting drives the down-dropping and tilting of full and half grabens, generating relief and accommodation space for fluvial systems, lake basins, and associated sediment accumulation. Continued stretching and thinning of continental lithosphere promotes decompression melting of the upper mantle, fueling volcanism across rifts; in the Afar Depression, magmatic activity is further enhanced by an underlying mantle plume.This dissertation integrates detrital zircon geochronology, basalt geochemistry, and field and remote-based geologic mapping to investigate the interplay of hydrology, sedimentation, and volcanism in extensional environments. Research focuses on Plio-Pleistocene sedimentary rift basins of the Lower Awash Valley in the AD and on the La Laja scoria cone, the youngest explosive vent in the Quaternary-modern Pinacate Volcanic Field (PVF) of Sonora, Mexico, located within the southwestern Basin and Range and proximal to the Gulf of California transtensional rift.Detrital zircon U-Pb results from Miocene-Pleistocene sedimentary packages, coupled with analyses of modern Awash and Mille River sediments, reveal strong tectonomagmatic control over basin configuration and paleolake distribution during the past ~9 Ma in the Afar region. The spatial and temporal evolution of these basins is closely tied to the birth, development, and migration of the Afar rift-rift-rift triple junction. My findings align with models proposing north-northeastward triple-junction migration and further constrain its timing to ~2.9-2.6 Ma.Tephra stratigraphy, basalt geochemistry, and detailed mapping of lava flows at the La Laja scoria cone (12 ± 4 ka) elucidate the chronology and eruptive dynamics of the youngest explosive event in the PVF. The LLT-2 tephra deposit indicates an eruption column height of 3-5 km with a duration of 13 ± 7 hours, consistent with explosive Strombolian activity. Major and trace element geochemistry of lavas and silicic xenoliths indicates that La Laja accessed magmas from different crustal levels, including a shallow-crustal batch undergoing fractional crystallization and bulk assimilation silicic country rock.
- 일반주제명
- Geology
- 일반주제명
- Sedimentary geology
- 일반주제명
- Geophysics
- 일반주제명
- Geochemistry
- 키워드
- Afar Depression
- 키워드
- Ethiopia
- 기타저자
- Arizona State University Geological Sciences
- 기본자료저록
- Dissertations Abstracts International. 87-06B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520260202105317
■006m o d
■007cr#unu||||||||
■020 ▼a9798265462213
■035 ▼a(MiAaPQ)AAI32286891
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a551
■1001 ▼aChupik, Daniel.
■24510▼aTectonic, Magmatic, and Sedimentary Interactions in Extensional Settings: Insights From the Afar Depression, Ethiopia and Pinacate Volcanic Field, Mexico
■260 ▼a[Sl]▼bArizona State University▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a365 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-06, Section: B.
■500 ▼aAdvisor: Arrowsmith, Ramon;Campisano, Christopher.
■5021 ▼aThesis (Ph.D.)--Arizona State University, 2025.
■520 ▼aExtensional tectonic settings, exemplified by the Afar Depression (AD) triple junction in Ethiopia and the Basin and Range Province of southwestern North America, create favorable conditions for fluviolacustrine basin development and the formation of volcanic fields. Normal faulting drives the down-dropping and tilting of full and half grabens, generating relief and accommodation space for fluvial systems, lake basins, and associated sediment accumulation. Continued stretching and thinning of continental lithosphere promotes decompression melting of the upper mantle, fueling volcanism across rifts; in the Afar Depression, magmatic activity is further enhanced by an underlying mantle plume.This dissertation integrates detrital zircon geochronology, basalt geochemistry, and field and remote-based geologic mapping to investigate the interplay of hydrology, sedimentation, and volcanism in extensional environments. Research focuses on Plio-Pleistocene sedimentary rift basins of the Lower Awash Valley in the AD and on the La Laja scoria cone, the youngest explosive vent in the Quaternary-modern Pinacate Volcanic Field (PVF) of Sonora, Mexico, located within the southwestern Basin and Range and proximal to the Gulf of California transtensional rift.Detrital zircon U-Pb results from Miocene-Pleistocene sedimentary packages, coupled with analyses of modern Awash and Mille River sediments, reveal strong tectonomagmatic control over basin configuration and paleolake distribution during the past ~9 Ma in the Afar region. The spatial and temporal evolution of these basins is closely tied to the birth, development, and migration of the Afar rift-rift-rift triple junction. My findings align with models proposing north-northeastward triple-junction migration and further constrain its timing to ~2.9-2.6 Ma.Tephra stratigraphy, basalt geochemistry, and detailed mapping of lava flows at the La Laja scoria cone (12 ± 4 ka) elucidate the chronology and eruptive dynamics of the youngest explosive event in the PVF. The LLT-2 tephra deposit indicates an eruption column height of 3-5 km with a duration of 13 ± 7 hours, consistent with explosive Strombolian activity. Major and trace element geochemistry of lavas and silicic xenoliths indicates that La Laja accessed magmas from different crustal levels, including a shallow-crustal batch undergoing fractional crystallization and bulk assimilation silicic country rock.
■590 ▼aSchool code: 0010.
■650 4▼aGeology
■650 4▼aSedimentary geology
■650 4▼aGeophysics
■650 4▼aGeochemistry
■653 ▼aAfar Depression
■653 ▼aSedimentary interactions
■653 ▼aEthiopia
■653 ▼aPinacate Volcanic Field
■690 ▼a0372
■690 ▼a0996
■690 ▼a0594
■690 ▼a0373
■71020▼aArizona State University▼bGeological Sciences.
■7730 ▼tDissertations Abstracts International▼g87-06B.
■790 ▼a0010
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17360184▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
