Download or read book Structural Geology and Stratigraphy Along a Segment of the Denali Fault System Central Alaska Range Alaska written by Robert G. Hickman and published by . This book was released on 1974 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Structural geology and stratigraphy along a segment of the Denali fault system central Alaska Range Alaska written by Robert Gunn Hickman and published by . This book was released on 1971 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stratigraphy Metamorphic Geology and Structural Geology of the Central Alaska Range Alaska written by Kirk W. Sherwood and published by . This book was released on 1979 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Structural Geology and Stratigraphy Near Panorama Mountain Central Alaska Range Alaska written by Linda M. Maher and published by . This book was released on 1986 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Structural Geology and Stratigraphy Along a Segment of the Denali Fault System Central Alaska Range Alaska written by Robert G. Hickman and published by . This book was released on 1974 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stratigraphy Structure and Metamorphism of the Mount Deborah Area Central Alaska Range Alaska written by Wayne Martin Brewer and published by . This book was released on 1982 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Structural Geology of the Southeast Rainbow Mountain Area Central Alaska Range written by John Charles Turner and published by . This book was released on 1969 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stratigraphy and Structural Geology of the Yanert Glacier Area East Central Alaska Range Alaska written by Theodore Francis Cota and published by . This book was released on 1975 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Tectonic Growth of a Collisional Continental Margin written by Kenneth D. Ridgway and published by Geological Society of America. This book was released on 2007 with total page 676 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The convergent margin of southern Alaska is considered one of the type areas for understanding the growth of continental margins through collisional tectonic processes. Collisional processes that formed this margin were responsible for multiple episodes of sedimentary basin development, subduction complex growth, magmatism, and deformation. Two main collisional episodes shaped this Mesozoic-Cenozoic continental margin. The first event was the Mesozoic collision of the allochthonous Wrangellia composite terrane. This event represents the largest addition of juvenile crust to western North America in the past 100 m.y. The second event is the ongoing collision of the Yakutat terrane along the southeastern margin of Alaska. This Cenozoic event has produced the highest coast mountain range on Earth (Saint Elias Mountains), the Wrangell continental arc, and sedimentary basins throughout southern Alaska. Active collisional processes continue to shape the southern margin of Alaska, mainly through crustal shortening and strike-slip deformation, large-magnitude earthquakes, and rapid uplift and exhumation of mountain belts and high sedimentation rates in adjacent sedimentary basins. This volume contains 24 articles that integrate new geophysical and geologic data, including many field-based studies, to better link the sedimentary, structural, geochemical, and magmatic processes that are important for understanding the development of collisional continental margins."--Publisher's website.
Download or read book Possibly Offset Plutons Along the Denali Fault McKinley Strand Central Alaska Range Alaska written by Wayne Martin Brewer and published by . This book was released on 1977 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stratigraphy and Structural Geology of the Moose Creek Area Central Alaska Range Alaska written by Kerry David Newell and published by . This book was released on 1975 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Paleozoic to Neogene Stratigraphic and Structural History of the Alaska Range Suture Zone North of the Denali Fault East Central Alaska Range written by Casey Jean Huff and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Cretaceous to Neogene significance and evolution of the ~2000 km long Denali fault, which extends from southern Alaska into the Yukon Territory, including its role in the development of the Alaska Range suture zone, is poorly understood. The Denali fault within the Alaska Range suture zone is addressed on two different timescales in this study. First, this study presents stratigraphic evidence for the evolution of the collision of the allocthonous Wrangellia composite terrane (WCT) into the margin of Mesozoic North America. The collision resulted in the formation Alaska Range suture zone in south-central Alaska. This study focused on the northern edge of the suture zone within the east central Alaska Range just north of the Denali fault. The stratigraphy of Devonian to Upper Cretaceous sedimentary strata are examined using U-Pb ages and Hf isotopic compositions on detrital zircons along with point counts on sandstones. The data show that a pre-collisional sandstone of the Devonian Yanert Fork assemblage has a maximum depositional age (MDA) of ~384 Ma and a strong affinity for the continental margin of North America. The Upper Jurassic-Lower Cretaceous east central Alaska Range Kahiltna assemblage (MDA ~145 Ma) is in a faulted, unconformable contact with the Devonian Yanert Fork formation. Hf isotopic data from this unit indicates sediment was sourced from both the WCT and Mesozoic North America. These data suggest that deposition from North America into the Kahiltna basin occurred 20 m.y. earlier than previous studies have suggested. The deposition of the transitional marine to non-marine Upper Cretaceous Panorama Peak unit (MDA ~84 Ma) indicates collision ended by the late Cretaceous. Second, this study examines the brittle structures accommodating the ~22 Ma to recent exhumation of the east central Alaska Range immediately north of the active, dextral-slip Denali fault. Using the graphical kinematic method on slickenlines in brittle fault zones from the region of youngest (~1 Ma apatite fission track age) exhumation and comparing it to the region of minor Neogene exhumation (~15 Ma apatite fission track age), this study shows that most faults in the region are NW-SE striking, moderately-to-steeply dipping normal faults and E-W striking dextral strike-slip faults. The fault plane solutions are compatible with right-lateral simple shear along the E-W striking right-lateral strike-slip Denali fault. The prevalence of these normal faults suggests that the youngest exhumation within the east central Alaska Range is accommodated at the surface by normal faults.
Download or read book The Denali Fault System in the Dick Creek written by Christopher Arthur Rautman and published by . This book was released on 1974 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Active Tectonics and Seismic Potential of Alaska written by Jeffrey T. Freymueller and published by John Wiley & Sons. This book was released on 2013-06-05 with total page 1025 pages. Available in PDF, EPUB and Kindle. Book excerpt: Published by the American Geophysical Union as part of the Geophysical Monograph Series, Volume 179. This multidisciplinary monograph provides the first modern integrative summary focused on the most spectacular active tectonic systems in North America. Encompassing seismology, tectonics, geology, and geodesy, it includes papers that summarize the state of knowledge, including background material for those unfamiliar with the region; address global hypotheses using data from Alaska; and test important global hypotheses using data from this region. It is organized around four major themes: subduction and great earthquakes at the Aleutian Arc, the transition from strike slip to accretion and subduction of the Yakutat microplate, the Denali fault and related structures and their role in accommodating permanent deformation of the overriding plate, and regional integration and large-scale models and the use of data from Alaska to address important global questions and hypotheses. The book's publication near the beginning of the National Science Foundation's EarthScope project makes it especially timely because Alaska is perhaps the least understood area within the EarthScope footprint, and interest in the region can be expected to rise with time as more EarthScope data become available.
Download or read book Tectonic Growth of a Collisional Continental Margin written by Kenneth D. Ridgway and published by . This book was released on 2007 with total page 678 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The convergent margin of southern Alaska is considered one of the type areas for understanding the growth of continental margins through collisional tectonic processes. Collisional processes that formed this margin were responsible for multiple episodes of sedimentary basin development, subduction complex growth, magmatism, and deformation. Two main collisional episodes shaped this Mesozoic-Cenozoic continental margin. The first event was the Mesozoic collision of the allochthonous Wrangellia composite terrane. This event represents the largest addition of juvenile crust to western North America in the past 100 m.y. The second event is the ongoing collision of the Yakutat terrane along the southeastern margin of Alaska. This Cenozoic event has produced the highest coast mountain range on Earth (Saint Elias Mountains), the Wrangell continental arc, and sedimentary basins throughout southern Alaska. Active collisional processes continue to shape the southern margin of Alaska, mainly through crustal shortening and strike-slip deformation, large-magnitude earthquakes, and rapid uplift and exhumation of mountain belts and high sedimentation rates in adjacent sedimentary basins. This volume contains 24 articles that integrate new geophysical and geologic data, including many field-based studies, to better link the sedimentary, structural, geochemical, and magmatic processes that are important for understanding the development of collisional continental margins."--Publisher's website.
Download or read book Sedimentology and Stratigraphy of Upper Triassic Carbonate and Clastic Strata of the Chulitna Terrane Alaska Range South central Alaska written by Jennifer L. DeLoge and published by . This book was released on 2009 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Moletrack Scarps to Mountains written by Sean Patrick Bemis and published by . This book was released on 2010 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: Deformation across plate boundaries often occurs over broad zones with relative motions between plates typically accommodated by faults of different styles acting together in a complex system. Collision of the Yakutat microplate within the Alaskan portion of the Pacific-North America plate boundary drives deformation over 600 km away where the Denali fault divides predominantly rigid crustal block motions of southern Alaska from distributed deformation in central Alaska. Quaternary geologic mapping along the Nenana River valley and the Japan Hills of the northern foothills of the Alaska Range defines zones of Quaternary thrust faulting recorded in the progressive deformation of Pleistocene fluvial terraces. I use topographic profiles of these terraces and paleoseismic trenching of fault scarps to characterize the Quaternary activity and constrain the subsurface geometry of these faults. Radiocarbon and cosmogenic exposure dating methods provide age control on the stratigraphy in the trenches and landforms offset by these faults. These observations define a 1-1.5 mm/yr slip rate for the Gold King fault which changes laterally from a north-vergent thrust into a north and south vergent thrust wedge that uplifts the Japan Hills. Along the Nenana River valley, the progressive deformation of Pleistocene surfaces defines a north-vergent critically-tapered thrust wedge. The geometry of progressive uplift and folding requires a near planar, south-dipping basal thrust fault with two major north-dipping backthrusts. All three faults were active simultaneously on a scale of 10 4 yrs with slip rates of 0.25-1 mm/yr, until the late Pleistocene when we infer the retreat of glacial ice from the main axis of the Alaska Range caused a change in thrust wedge dynamics. I use the orientation of Quaternary deformation north of the Denali fault to show that strain is highly partitioned and establish geologic constraints on the regional horizontal stress orientation. North of the Denali fault, fault-normal principal shortening accommodates 3-5 mm/yr of strain transfer across the Denali fault system. Two appendices contain additional results of paleoseismic trenching and neotectonic investigations across 4 active faults near the Nenana River. This dissertation includes previously unpublished co-authored material.
