The SCREE Mountaineering Club Of
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Alaska Division of Geological & Geophysical Surveys Geologic
Cretaceous to Tertiary magmatism and associated mineralization in the Lime Hills C-1 Quadrangle, Western Alaska Range Karri R. Sicard 1, Evan Twelker1, Larry K. Freeman1, Alicja Wypych1, Jeff A. Benowitz2 , and M. Andy Kass3 1Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska 2Geophysical Institute, Department of Geology & Geophysics, University of Alaska Fairbanks 3Crustal Geophysics and Geochemistry Science Center, US Geological Survey, Denver, CO Alaska Miners Association Annual Convention 1 November 5, 2014 – Anchorage, Alaska Outline ► Location and geology ► Mineralization highlights ► New 40Ar/39Ar geochronology . With relevant geochemistry ► 3D voxel model of Copper Joe resistivity ► Relationship to Revelation Mountains uplift ► Acknowledgments 2 Photo by T.C. Wright Cretaceous-Tertiary Porphyry Trend ~70 Ma Select Northern Cordillera ~90 Ma porphyry copper deposits ~6 Ma 3 http://www.kiskametals.com Terrane Map YUKON-TANANA TERRANE McGrath WRANGELLIA Project Area Anchorage 4 Modified from Colpron and Nelson, 2011 Denali-Farewell Fault System Jurassic-Cretaceous Revelation flysch Mountains Lime Hills C-1 Cretaceous and Tertiary Quad plutonic rocks Tordrillo Mountains Tertiary volcanics 5 Map modified from Wilson and others, 1998 Airborne Geophysical Surveys Farewell (Burns and others, 2014) Middle Styx (Burns and others, 2013) East Styx More positive magnetic values (Released November 2014) Styx Lime Hills (Burns and More negative others 2008) 6 magnetic values C-1 Quad nT Anomalous Gold Occurrences Circles -
Geologic Maps of the Eastern Alaska Range, Alaska, (44 Quadrangles, 1:63360 Scale)
Report of Investigations 2015-6 GEOLOGIC MAPS OF THE EASTERN ALASKA RANGE, ALASKA, (44 quadrangles, 1:63,360 scale) descriptions and interpretations of map units by Warren J. Nokleberg, John N. Aleinikoff, Gerard C. Bond, Oscar J. Ferrians, Jr., Paige L. Herzon, Ian M. Lange, Ronny T. Miyaoka, Donald H. Richter, Carl E. Schwab, Steven R. Silva, Thomas E. Smith, and Richard E. Zehner Southeastern Tanana Basin Southern Yukon–Tanana Upland and Terrane Delta River Granite Jarvis Mountain Aurora Peak Creek Terrane Hines Creek Fault Black Rapids Glacier Jarvis Creek Glacier Subterrane - Southern Yukon–Tanana Terrane Windy Terrane Denali Denali Fault Fault East Susitna Canwell Batholith Glacier Maclaren Glacier McCallum Creek- Metamorhic Belt Meteor Peak Slate Creek Thrust Broxson Gulch Fault Thrust Rainbow Mountain Slana River Subterrane, Wrangellia Terrane Phelan Delta Creek River Highway Slana River Subterrane, Wrangellia Terrane Published by STATE OF ALASKA DEPARTMENT OF NATURAL RESOURCES DIVISION OF GEOLOGICAL & GEOPHYSICAL SURVEYS 2015 GEOLOGIC MAPS OF THE EASTERN ALASKA RANGE, ALASKA, (44 quadrangles, 1:63,360 scale) descriptions and interpretations of map units Warren J. Nokleberg, John N. Aleinikoff, Gerard C. Bond, Oscar J. Ferrians, Jr., Paige L. Herzon, Ian M. Lange, Ronny T. Miyaoka, Donald H. Richter, Carl E. Schwab, Steven R. Silva, Thomas E. Smith, and Richard E. Zehner COVER: View toward the north across the eastern Alaska Range and into the southern Yukon–Tanana Upland highlighting geologic, structural, and geomorphic features. View is across the central Mount Hayes Quadrangle and is centered on the Delta River, Richardson Highway, and Trans-Alaska Pipeline System (TAPS). Major geologic features, from south to north, are: (1) the Slana River Subterrane, Wrangellia Terrane; (2) the Maclaren Terrane containing the Maclaren Glacier Metamorphic Belt to the south and the East Susitna Batholith to the north; (3) the Windy Terrane; (4) the Aurora Peak Terrane; and (5) the Jarvis Creek Glacier Subterrane of the Yukon–Tanana Terrane. -
Club Activities
Club Activities EDITEDBY FREDERICKO.JOHNSON A.A.C.. Cascade Section. The Cascade Section had an active year in 1979. Our Activities Committee organized a slide show by the well- known British climber Chris Bonington with over 700 people attending. A scheduled slide and movie presentation by Austrian Peter Habeler unfortunately was cancelled at the last minute owing to his illness. On-going activities during the spring included a continuation of the plan to replace old bolt belay and rappel anchors at Peshastin Pinnacles with new heavy-duty bolts. Peshastin Pinnacles is one of Washington’s best high-angle rock climbing areas and is used heavily in the spring and fall by climbers from the northwestern United States and Canada. Other spring activities included a pot-luck dinner and slides of the American Women’s Himalayan Expedition to Annapurna I by Joan Firey. In November Steve Swenson presented slides of his ascents of the Aiguille du Triolet, Les Droites, and the Grandes Jorasses in the Alps. At the annual banquet on December 7 special recognition was given to sec- tion members Jim Henriot, Lynn Buchanan, Ruth Mendenhall, Howard Stansbury, and Sean Rice for their contributions of time and energy to Club endeavors. The new chairman, John Mendenhall, was introduced, and a program of slides of the alpine-style ascent of Nuptse in the Nepal Himalaya was presented by Georges Bettembourg, followed by the film, Free Climb. Over 90 members and guests were in attendance. The Cascade Section Endowment Fund Committee succeeded in raising more than $5000 during 1979, to bring total donations to more than $12,000 with 42% of the members participating. -
2020 January Scree
the SCREE Mountaineering Club of Alaska January 2020 Volume 63, Number 1 Contents Mount Anno Domini Peak 2330 and Far Out Peak Devils Paw North Taku Tower Randoism via Rosie’s Roost "The greatest danger for Berlin Wall most of us is not that our aim is too high and we Katmai and the Valley of Ten Thousand Smokes miss it, but that it is too Peak of the Month: Old Snowy low and we reach it." – Michelangelo JANUARY MEETING: Wednesday, January 8, at 6:30 p.m. Luc Mehl will give the presentation. The Mountaineering Club of Alaska www.mtnclubak.org "To maintain, promote, and perpetuate the association of persons who are interested in promoting, sponsoring, im- proving, stimulating, and contributing to the exercise of skill and safety in the Art and Science of Mountaineering." This issue brought to you by: Editor—Steve Gruhn assisted by Dawn Munroe Hut Needs and Notes Cover Photo If you are headed to one of the MCA huts, please consult the Hut Gabe Hayden high on Devils Paw. Inventory and Needs on the website (http://www.mtnclubak.org/ Photo by Brette Harrington index.cfm/Huts/Hut-Inventory-and-Needs) or Greg Bragiel, MCA Huts Committee Chairman, at either [email protected] or (907) 350-5146 to see what needs to be taken to the huts or repaired. All JANUARY MEETING huts have tools and materials so that anyone can make basic re- Wednesday, January 8, at 6:30 p.m. at the BP Energy Center at pairs. Hutmeisters are needed for each hut: If you have a favorite 1014 Energy Court in Anchorage. -
Environmental Assessment
Alaska Outer Continental Shelf OCS EIS/EA BOEM 2012-081 ION Geophysical 2012 Seismic Survey Beaufort Sea and Chukchi Sea, Alaska ENVIRONMENTAL ASSESSMENT Prepared By: Office of Environment Alaska OCS Region Cover Illustrations provided by ION Geophysical for ION G&G Permit Application #12-01 U.S. Department of the Interior Bureau of Ocean Energy Management October 2012 Alaska OCS Region This Page Intentionally Left Blank 2012 ION Seismic Survey Environmental Assessment Acronyms and Abbreviations ~ ....................................Approximately AAC ..............................Alaska Administrative Code ACIA .............................Arctic Climate Impact Assessment ACP ...............................Arctic Coastal Plain ADEC ............................Alaska Department of Environmental Conservation ADF&G .........................Alaska Department of Fish and Game AEWC ...........................Alaska Eskimo Whaling Commission AFMP ............................Arctic Fishery Management Plan AO .................................Arctic Oscillation AQCR ............................Air Quality Control Regions bbl ..................................Barrel/Barrels BOEM ...........................Bureau of Ocean Energy Management BOEMRE ......................Bureau of Ocean Energy Management, Regulation and Enforcement CAA ..............................Clean Air Act or Conflict Avoidance Agreement CEQ ...............................Council on Environmental Quality CFR ...............................Code of Federal Regulations CO .................................carbon -
Alaska Range
Alaska Range Introduction The heavily glacierized Alaska Range consists of a number of adjacent and discrete mountain ranges that extend in an arc more than 750 km long (figs. 1, 381). From east to west, named ranges include the Nutzotin, Mentas- ta, Amphitheater, Clearwater, Tokosha, Kichatna, Teocalli, Tordrillo, Terra Cotta, and Revelation Mountains. This arcuate mountain massif spans the area from the White River, just east of the Canadian Border, to Merrill Pass on the western side of Cook Inlet southwest of Anchorage. Many of the indi- Figure 381.—Index map of vidual ranges support glaciers. The total glacier area of the Alaska Range is the Alaska Range showing 2 approximately 13,900 km (Post and Meier, 1980, p. 45). Its several thousand the glacierized areas. Index glaciers range in size from tiny unnamed cirque glaciers with areas of less map modified from Field than 1 km2 to very large valley glaciers with lengths up to 76 km (Denton (1975a). Figure 382.—Enlargement of NOAA Advanced Very High Resolution Radiometer (AVHRR) image mosaic of the Alaska Range in summer 1995. National Oceanic and Atmospheric Administration image mosaic from Mike Fleming, Alaska Science Center, U.S. Geological Survey, Anchorage, Alaska. The numbers 1–5 indicate the seg- ments of the Alaska Range discussed in the text. K406 SATELLITE IMAGE ATLAS OF GLACIERS OF THE WORLD and Field, 1975a, p. 575) and areas of greater than 500 km2. Alaska Range glaciers extend in elevation from above 6,000 m, near the summit of Mount McKinley, to slightly more than 100 m above sea level at Capps and Triumvi- rate Glaciers in the southwestern part of the range. -
Southcentral Alaska Stock
Revised: April 2014 NORTHERN SEA OTTER (Enhydra lutris kenyoni): Southcentral Alaska Stock STOCK DEFINITION AND GEOGRAPHIC RANGE Sea otters occur in nearshore coastal waters of the U.S. along the North Pacific Rim from the Aleutian Islands to California. The species is most commonly observed within the 40-meter (approximately 12.2 feet [ft]) depth contour because the animals require frequent access to benthic foraging habitat in subtidal and intertidal zones (Reidman and Estes 1990). Sea otters are not migratory and generally do not disperse over long distances, although movements of tens of kilometers (km) (tens of miles [mi]) are common (Garshelis and Garshelis 1984). Annual home range sizes of adult sea otters are relatively small, with male territories ranging from 4 to 11 square kilometers (km2) (approximately 10.5 to 28.5 square miles[mi2]) and adult female home ranges from a few to 24 km2 (approximately 62 mi2) (Garshelis and Garshelis 1984; Ralls et al. 1988; Jameson 1989). Due to their benthic foraging, sea otter distribution is largely limited by their ability to dive to the sea floor (Bodkin et al. 2004). 1 Figure 1. Approximate distribution and stock boundaries of northern sea otters in Alaska waters (shaded area). The spatial scale at which sea otter populations are managed remains an important, although largely unexplored issue (Bodkin and Ballachey 2010) deserving further study. Bodkin and Ballachey (2010) used models of sea otter mortality to show that range-wide reductions and extirpations during the commercial fur trade of the 18th and 19th centuries occurred not simply because of excessive harvest, but because the harvest was not allocated proportional to the abundance and distribution of sea otters. -
P1616 Text-Only PDF File
A Geologic Guide to Wrangell–Saint Elias National Park and Preserve, Alaska A Tectonic Collage of Northbound Terranes By Gary R. Winkler1 With contributions by Edward M. MacKevett, Jr.,2 George Plafker,3 Donald H. Richter,4 Danny S. Rosenkrans,5 and Henry R. Schmoll1 Introduction region—his explorations of Malaspina Glacier and Mt. St. Elias—characterized the vast mountains and glaciers whose realms he invaded with a sense of astonishment. His descrip Wrangell–Saint Elias National Park and Preserve (fig. tions are filled with superlatives. In the ensuing 100+ years, 6), the largest unit in the U.S. National Park System, earth scientists have learned much more about the geologic encompasses nearly 13.2 million acres of geological won evolution of the parklands, but the possibility of astonishment derments. Furthermore, its geologic makeup is shared with still is with us as we unravel the results of continuing tectonic contiguous Tetlin National Wildlife Refuge in Alaska, Kluane processes along the south-central Alaska continental margin. National Park and Game Sanctuary in the Yukon Territory, the Russell’s superlatives are justified: Wrangell–Saint Elias Alsek-Tatshenshini Provincial Park in British Columbia, the is, indeed, an awesome collage of geologic terranes. Most Cordova district of Chugach National Forest and the Yakutat wonderful has been the continuing discovery that the disparate district of Tongass National Forest, and Glacier Bay National terranes are, like us, invaders of a sort with unique trajectories Park and Preserve at the north end of Alaska’s panhan and timelines marking their northward journeys to arrive in dle—shared landscapes of awesome dimensions and classic today’s parklands. -
Catalogue 48: June 2013
Top of the World Books Catalogue 48: June 2013 Mountaineering Fiction. The story of the struggles of a Swiss guide in the French Alps. Neate X134. Pete Schoening Collection – Part 1 Habeler, Peter. The Lonely Victory: Mount Everest ‘78. 1979 Simon & We are most pleased to offer a number of items from the collection of American Schuster, NY, 1st, 8vo, pp.224, 23 color & 50 bw photos, map, white/blue mountaineer Pete Schoening (1927-2004). Pete is best remembered in boards; bookplate Ex Libris Pete Schoening & his name in pencil, dj w/ edge mountaineering circles for performing ‘The Belay’ during the dramatic descent wear, vg-, cloth vg+. #9709, $25.- of K2 by the Third American Karakoram Expedition in 1953. Pete’s heroics The first oxygenless ascent of Everest in 1978 with Messner. This is the US saved six men. However, Pete had many other mountain adventures, before and edition of ‘Everest: Impossible Victory’. Neate H01, SB H01, Yak H06. after K2, including: numerous climbs with Fred Beckey (1948-49), Mount Herrligkoffer, Karl. Nanga Parbat: The Killer Mountain. 1954 Knopf, NY, Saugstad (1st ascent, 1951), Mount Augusta (1st ascent) and King Peak (2nd & 1st, 8vo, pp.xx, 263, viii, 56 bw photos, 6 maps, appendices, blue cloth; book- 3rd ascents, 1952), Gasherburm I/Hidden Peak (1st ascent, 1958), McKinley plate Ex Libris Pete Schoening, dj spine faded, edge wear, vg, cloth bookplate, (1960), Mount Vinson (1st ascent, 1966), Pamirs (1974), Aconcagua (1995), vg. #9744, $35.- Kilimanjaro (1995), Everest (1996), not to mention countless climbs in the Summarizes the early attempts on Nanga Parbat from Mummery in 1895 and Pacific Northwest. -
Skagway 1 :250,M)O Quadrangl Es , Open-File Report 85-395 Menlo Park
DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY Preliminary reconnaissance geologic map of the Juneau, Taku River, At1in, and part of the Skagway 1 :250,M)O quadrangl es , southeastern Alaska David A. Brew and Arthur 0. Ford ' Open-File Report 85-395 This map is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards and stratigraphic nomenclature. Menlo Park United States Department of the Interior GEOLOGICAL SURVEY Branch of Alaskan Geology 345 Middl efield RoadlMS 904 Menlo Park, CA 94025 September 3, 1985 MEMORANDUM To : Recipients of OF 85-395 From: Sue Douglass Subject: ERRATA ERRATA: U.S. Geological Survey Open-Fi le Report 85-395 Page 10 - Left side of page Triassic unit symbols should read: "Rhh and X hp" (see below) HYD GROUP (Upper Triassic)--~amed by Loney (1964) from exposures in Gambier and Pybus Bays on Admiralty Is1 and; extended to the Keku Is1 ets area and redefined by Muffler (1967); as mapped, divided into: (This division has not yet been made on the map, all currently incl uded in Phyll ite, etc.. unit). -k hh Hound Island Volcanics--Basal tic pillow breccia and pillow lava flows, andesi ti c vol cani c breccia, aquagene tuff, tuff breccia, mi nor thin- bedded 1imes tone; outcrops extensi vel y on northern Admiral ty I sl and. Kk Phyll i te, Limestone, S7 ate and C hert--Unnamed and undi vidad uni t interpreted (Lathram and others. 1959) to under1 ie the rocks here referred to as the Hound I sl and Vol cani cs on northern Admiral ty Is1 and, PRELIMINARY RECONNAISSANCE GEOLOGIC MAP OF THE JUNEAU, TAKU RIVER, ATLIN, AND PART OF THE SKAGWAY 1 :250,000 QUADRANGLES, SOUTHEASTERN ALASKA BY David A, Brew and Arthur B. -
North America Summary, 1968
240 CLIMBS A~D REGIONAL ?\OTES North America Summary, 1968. Climbing activity in both Alaska and Canada subsided mar kedly from the peak in 1967 when both regions were celebrating their centen nials. The lessened activity seems also to have spread to other sections too for new routes and first ascents were considerably fewer. In Alaska probably the outstanding climb from the standpoint of difficulty was the fourth ascent of Mount Foraker, where a four-man party (Warren Bleser, Alex Birtulis, Hans Baer, Peter Williams) opened a new route up the central rib of the South face. Late in June this party flew in from Talkeetna to the Lacuna glacier. By 11 July they had established their Base Camp at the foot of the South face and started up the rib. This involved 10,000 ft of ice and rotten rock at an angle of 65°. In the next two weeks three camps were estab lished, the highest at 13,000 ft. Here, it was decided to make an all-out push for the summit. On 24 July two of the climbers started ahead to prepare a route. In twenty-eight hours of steady going they finally reached a suitable spot for a bivouac. The other two men who started long after them reached the same place in ten hours of steady going utilising the steps, fixed ropes and pitons left by the first party. After a night in the bivouac, the two groups then contin ued together and reached the summit, 17,300 ft, on 25 July. They were forced to bivouac another night on the return before reaching their high camp. -
A Trip to the Kichatnas
A Trip to the Kichatnas A lan K. L ong I N the decade since Al DeMaria’s pioneering visit to Alaska’s Cathedral Spires, the range has gained a reputation for towering granite peaks, claustrophobic glaciers, and abominable weather. Until 1975, the relatively small number of people who diverted their pilots from the Talkeetna-Kahiltna milk run had concentrated on mountaineering routes in the Spires, choosing the easiest lines up the peaks and even then often having epic struggles with the weather. New developments in equipment, notably in synthetic substi tutes for down gear, have opened the way for more ambitious ascents. Last year a significant breakthrough was made in the Kichatnas when two 8000-foot peaks were ascended by difficult big-wall routes. Amazingly enough, Mike Graber and Dave Black wanted to return to the Spires without even allowing a couple of years to dull the memories of their narrow escape from Sasquatch (South Lriple Peak). Having found the rainy southern Logans relatively tame, Andy Embick and I looked forward to sticking our necks out a little, and the Kichatnas seemed like the logical choice. We were all motivated by a desire to test ourselves in extreme alpine situations. Mike and Dave had a more specific objective in Middle Triple Peak, the second highest (and highest unclimbed) peak in the range. They’d spent a long time the previous year looking for lines on the gigantic west face above the Monolith Glacier and were more attracted by the beautiful east buttress, a classic knife-edge which jumps enticingly from the aerial photos.