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FAULT PATTERNS IN SOUTHEASTERN ALASKA

1958; Geological Society of America; Volume: 69; Issue: 11 Linguagem: Inglês

10.1130/0016-7606(1958)69[1431

1943-2674

William Stephens Twenhofel, C.L. Sainsbury,

Atmospheric and Environmental Gas Dynamics

Research Article| November 01, 1958 FAULT PATTERNS IN SOUTHEASTERN ALASKA WILLIAM S TWENHOFEL; WILLIAM S TWENHOFEL U. S. GEOLOGICAL SURVEY, DENVER, COLO.; UNION CARBIDE CORP., NEW YORK, N. Y. Search for other works by this author on: GSW Google Scholar C. L SAINSBURY C. L SAINSBURY U. S. GEOLOGICAL SURVEY, DENVER, COLO.; UNION CARBIDE CORP., NEW YORK, N. Y. Search for other works by this author on: GSW Google Scholar GSA Bulletin (1958) 69 (11): 1431–1442. https://doi.org/10.1130/0016-7606(1958)69[1431:FPISA]2.0.CO;2 Article history first online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation WILLIAM S TWENHOFEL, C. L SAINSBURY; FAULT PATTERNS IN SOUTHEASTERN ALASKA. GSA Bulletin 1958;; 69 (11): 1431–1442. doi: https://doi.org/10.1130/0016-7606(1958)69[1431:FPISA]2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract Prominent linear features interpreted as faults were plotted from aerial photographs of southeastern Alaska, and the resultant patterns were analyzed with reference to the literature and to the field relations determined by the writers and other geologists of the U. S. Geological Survey. The faults, as interpreted, seem to belong to a well-defined and widespread system that trends northwesterly and to three ill-defined systems that trend northerly, northeasterly, and easterly respectively. The faults are part of a system of fractures subparalleling the Coast Ranges and the North Pacific coast of British Columbia and Alaska.Movement on the faults in southeastern Alaska took place during late Mesozoic, Tertiary, and possibly Recent times. A major lineament, the Denali lineament, can be traced for about 1600 miles, from southeastern Alaska northwest along the arcuate Alaskan Range and thence southwest to Bristol Bay.Most of the hot springs of the area are located on conspicuous faults. Some of the carbonated springs are on linears, but some are not. Sulfur springs seem to be unrelated to linears.The writers suggest that certain mineral deposits in southeastern Alaska are spatially related to certain faults, particularly those of the northwest-trending system. Data support this thesis for the mineral deposits of the Chichagof-Sitka belt and the Juneau gold belt. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.