Download or read book Geology of the Clearwater Mountains South central Alaska written by Alaska. Division of Geological and Geophysical Surveys and published by . This book was released on 1983 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geology of the Clearwater Mountains South central Alaska written by Thomas Edward Smith and published by . This book was released on 1981 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geology of the Clearwater Mountains and the Southern Boundary of the Alaska Range Suture Zone written by Philip Robert Mooney and published by . This book was released on 2010 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Talkeetna fault is located along the southern margin of the Mesozoic suture zone that juxtaposes an allochthonous island arc, the Wrangellia composite terrane, with the Mesozoic continental margin, the Yukon-Tanana terrane, in south-central Alaska. A discontinuous belt of Mesozoic siliciclastic strata were deposited in the Alaska Range suture zone, an ~150km wide zone of Mesozoic and Cenozoic basins that record the closing of an ocean basin and the collision of exotic terranes. These strata lie along almost the entire length of the margin of the Northern Cordillera, recording the history of the closing of this ocean basin. New geochronologic, structural, and mapping data from the Clearwater Mountains of south-central Alaska demonstrate that the Talkeetna fault is not a major thrust fault, but likely represents a normal fault overprinting a relict, deep-seated, strike slip terrane boundary. LA-ICPMS analysis of zircons from 5 detrital and 2 igneous samples collected from the Clearwater Mountains reveal a unique distribution of age peaks. Four detrital samples from fine-grained strata contain almost exclusively Mesozoic age zircons with single major peaks of ~150 Ma that represent the maximum depositional age of the strata. These strata contain none of the younger zircon signatures commonly found elsewhere in the Alaska Range suture zone. A detrital sample from a structurally unconformable boulder conglomerate juxtaposed against fine-grained siliciclastic strata contains Mesozoic, Paleozoic, and Precambrian grains with a maximum depositional age of ~85 Ma. Zircon ages from igneous rocks within the fine-grained siliciclastic strata, an intrusive gabbro (~142 Ma) and an interlayered volcanic flow (~149 Ma), provide additional constraints on the depositional age of the basin. Collectively, the U-Pb geochronologic data show that the sediments of the Clearwater Mountains were deposited in a location far from the continental margin with material shed from outboard terranes. With no potential sources in the immediate vicinity able to provide detritus of this age to the strata of the Clearwater Mountains, it is clear that these rocks must have been translated along the margin on a strike slip fault.

Download or read book Results of Geochemical Sampling in the Western Clearwater Mountains Alaska written by Thomas Edward Smith and published by . This book was released on 1970 with total page 498 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geology and Geochemistry of the Denali Prospect Clearwater Mountains Alaska written by Donald Lavern Stevens and published by . This book was released on 1971 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Age of the Sedimentation Plutonism and Regional Metamorphism in the Clearwater Mountains Region Central Alaska written by Thomas Edward Smith and published by . This book was released on 1971 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Multiple Glaciation and Gold placer Formation Valdez Creek Valley Western Clearwater Mountains Alaska written by Richard D. Reger and published by . This book was released on 1990 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geology Economic Geochemistry and Placer Gold Resources of the Western Clearwater Mountains East Central Alaska written by Thomas Edward Smith and published by . This book was released on 1971 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geochronology and Generalized Geology of the Central Alaska Range Clearwater Mountains and Northern Talkeetna Mountains written by Donald L. Turner and published by . This book was released on 1974 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The United States Geological Survey in Alaska written by and published by . This book was released on 1981 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The United States Geological Survey in Alaska Accomplishments During written by and published by . This book was released on 1979 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The United States Geological Survey in Alaska written by Thomas M. Cronin and published by . This book was released on 1981 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Library of Congress Subject Headings written by Library of Congress and published by . This book was released on 2012 with total page 1608 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Weathering of Placer Gold and the Quaternary Geology of Valdez Creek Clearwater Mountains Alaska written by Steven D. Teller and published by . This book was released on 1995 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Library of Congress Subject Headings written by Library of Congress. Cataloging Policy and Support Office and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geological Survey Circular written by and published by . This book was released on 1983 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Library of Congress Subject Headings written by Library of Congress. Office for Subject Cataloging Policy and published by . This book was released on 1991 with total page 1692 pages. Available in PDF, EPUB and Kindle. Book excerpt: