DOCSLIB.ORG

Modern Sedimentation Patterns in Lake El'gygytgyn, NE Russia, Derived from Surface Sediment and Inlet Streams Samples V Wennrich University of Cologne

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Modern Sedimentation Patterns in Lake El'gygytgyn, NE Russia, Derived from Surface Sediment and Inlet Streams Samples V Wennrich University of Cologne University of Wollongong Research Online Faculty of Science, Medicine and Health - Papers Faculty of Science, Medicine and Health 2013 Modern sedimentation patterns in Lake El'gygytgyn, NE Russia, derived from surface sediment and inlet streams samples V Wennrich University of Cologne Alexander Francke University of Wollongong, [email protected] A Dehnert Swiss Federal Nuclear Safety Inspectorate ENSI O Juschus Eberswalde University for Sustainable Development T Leipe Leibniz Institute For Baltic Sea Research See next page for additional authors Publication Details Wennrich, V., Francke, A., Dehnert, A., Juschus, O., Leipe, T., Vogt, C., Brigham-Grette, J., Minyuk, P. S., Melles, M. et al (2013). Modern sedimentation patterns in Lake El'gygytgyn, NE Russia, derived from surface sediment and inlet streams samples. Climate of the Past, 9 135-148. Research Online is the open access institutional repository for the University of Wollongong. For further information contact the UOW Library: [email protected] Modern sedimentation patterns in Lake El'gygytgyn, NE Russia, derived from surface sediment and inlet streams samples Abstract Lake El'gygytgyn/NE Russia holds a continuous 3.58 Ma sediment record, which is regarded as the most long-lasting climate archive of the terrestrial Arctic. Based on multi-proxy geochemical, mineralogical, and granulometric analyses of surface sediment, inlet stream and bedrock samples, supplemented by statistical methods, major processes influencing the modern sedimentation in the lake were investigated. Grain-size parameters and chemical elements linked to the input of feldspars from acidic bedrock indicate a wind- induced two-cell current system as major driver of sediment transport and accumulation processes in Lake El'gygytgyn. The distribution of mafic ockr related elements in the sediment on the lake floor can be traced back to the input of weathering products of basaltic rocks in the catchment. Obvious similarities in the spatial variability of manganese and heavy metals indicate sorption or co-precipitation of these elements with Fe and Mn hydroxides and oxides. But the similar distribution of organic matter and clay contents might also point to a fixation to organic components and clay minerals. An enrichment of mercury in the inlet streams might be indicative of neotectonic activity around the lake. The er sults of this study add to the fundamental knowledge of the modern lake processes of Lake El'gygytgyn and its lake-catchment interactions, and thus, yield crucial insights for the interpretation of paleo-data from this unique archive. Disciplines Medicine and Health Sciences | Social and Behavioral Sciences Publication Details Wennrich, V., Francke, A., Dehnert, A., Juschus, O., Leipe, T., Vogt, C., Brigham-Grette, J., Minyuk, P. S., Melles, M. et al (2013). Modern sedimentation patterns in Lake El'gygytgyn, NE Russia, derived from surface sediment and inlet streams samples. Climate of the Past, 9 135-148. Authors V Wennrich, Alexander Francke, A Dehnert, O Juschus, T Leipe, C Vogt, J Brigham-Grette, P S. Minyuk, and Martin Melles This journal article is available at Research Online: http://ro.uow.edu.au/smhpapers/4887 Clim. Past, 9, 135–148, 2013 www.clim-past.net/9/135/2013/ Climate doi:10.5194/cp-9-135-2013 of the Past © Author(s) 2013. CC Attribution 3.0 License. Modern sedimentation patterns in Lake El’gygytgyn, NE Russia, derived from surface sediment and inlet streams samples V. Wennrich1, A. Francke1, A. Dehnert2, O. Juschus3, T. Leipe4, C. Vogt5, J. Brigham-Grette6, P. S. Minyuk7, M. Melles1, and El’gygytgyn Science Party 1University of Cologne, Institute for Geology and Mineralogy, Cologne, Germany 2Swiss Federal Nuclear Safety Inspectorate ENSI, Brugg, Switzerland 3Eberswalde University for Sustainable Development, Eberswalde, Germany 4Leibniz Institute for Baltic Sea Research Warnemuende, Marine Geology, Rostock, Germany 5University Bremen, Department of Geosciences, Crystallography/ZEKAM, Bremen, Germany 6University of Massachusetts, Department of Geosciences, Amherst, USA 7Russian Academy of Sciences, Northeast Interdisciplinary Scientific Research Institute, Magadan, Russia Correspondence to: V. Wennrich ([email protected]) Received: 27 April 2012 – Published in Clim. Past Discuss.: 1 June 2012 Revised: 19 October 2012 – Accepted: 10 December 2012 – Published: 22 January 2013 Abstract. Lake El’gygytgyn/NE Russia holds a continuous 1 Introduction 3.58 Ma sediment record, which is regarded as the most long- lasting climate archive of the terrestrial Arctic. Based on multi-proxy geochemical, mineralogical, and granulometric In spring 2009, the ICDP El’gygytgyn Drilling Project re- analyses of surface sediment, inlet stream and bedrock sam- covered the 318-m long lacustrine sediment record of Lake ples, supplemented by statistical methods, major processes El’gygytgyn in Chukotka, NE Russia (Melles et al., 2011, influencing the modern sedimentation in the lake were inves- 2012; Fig. 1). Long high-resolution lake sediment records tigated. Grain-size parameters and chemical elements linked are known to well document regional hydrologic and cli- to the input of feldspars from acidic bedrock indicate a wind- matic responses to atmospheric changes (Brigham-Grette et induced two-cell current system as major driver of sediment al., 2007a), and therefore are valuable archives of climate and transport and accumulation processes in Lake El’gygytgyn. environmental changes (e.g. Allen et al., 1999; Gasse et al., The distribution of mafic rock related elements in the sed- 2011; Cohen, 2012). Given their often continuous sediment iment on the lake floor can be traced back to the input of sequences, large and old lake basins play an important role weathering products of basaltic rocks in the catchment. Ob- in collecting sedimentological information providing a conti- vious similarities in the spatial variability of manganese and nental signature to couple with the marine realm. Thus, these heavy metals indicate sorption or co-precipitation of these el- lakes help to close gaps in the knowledge on land–ocean in- ements with Fe and Mn hydroxides and oxides. But the sim- teractions through time. Nevertheless, the profound interpre- ilar distribution of organic matter and clay contents might tation of proxy data derived from lake sediment records re- also point to a fixation to organic components and clay min- quires an in-depth knowledge of the lake-specific modern bi- erals. An enrichment of mercury in the inlet streams might ological and sedimentological processes and their controlling be indicative of neotectonic activity around the lake. The factors (e.g. Vogel et al., 2010; Viehberg et al., 2012). results of this study add to the fundamental knowledge of Lake El’gygytgyn represents a unique site, because it the modern lake processes of Lake El’gygytgyn and its lake- holds the most long-lasting climate archive of the terres- catchment interactions, and thus, yield crucial insights for the trial Arctic (Melles et al., 2011, 2012), reaching back to the interpretation of paleo-data from this unique archive. time of meteorite impact event 3.58 Ma ago (Layer, 2000). Furthermore, the basin was never overcome by large Ceno- zoic continental ice-masses (Glushkova, 2001; Glushkova Published by Copernicus Publications on behalf of the European Geosciences Union. 136 V. Wennrich et al.: Modern sedimentation patterns in Lake El’gygytgyn tigated (e.g. Cremer and Wagner, 2003; Cremer et al., 2005; a 70°N Arctic Ocean Nolan and Brigham-Grette, 2007; Nolan et al., 2002; Fe- SIBERIA ALASKA dorov et al., 2012), and a variety of modern to sub-recent sample sets were taken for study (Melles et al., 2005). Lake El‘gygytgyn 60°N Bering Here, we present the combined results of a multi-proxy 180° 150°E Sea 150°W and statistical approach to enhance the understanding of the b modern sedimentation of Lake El’gygytgyn by analyzing a 1 set of surface sediment and inlet streams samples, as well 2 560 as hand samples from the surrounding bedrock. The major 540520 3 500 goal of this study is to provide information concerning the 4 dominant sedimentation patterns in the lake controlled by 5 climate-driven transport processes, bedrock geology, post- -170 6 depositional processes, but possibly also influenced by tec- -160 7 tonic activity. In combination with recent climatologic and 8 -150 hydrologic data (Nolan, 2012; Fedorov et al., 2012), these findings will enhance our understanding of fundamental in- 9 lake processes, and thus, form an important basis for the in- 10 terpretation of the Lake El’gygytgyn paleo-record extending 11 to 3.58 Ma. 12 0 1 2 3 4 5 km 2 Study site Fig. 1. (a) Map showing the locationFigure of1 Lake El’gygytgyn in the western Beringian Arctic, (b) geological map of the El’gygytgyn Lake El’gygytgyn (67◦300 N, 172◦050 E, 492 m a.s.l.; Fig. 1) impact impact crater illustrating the major stratigraphic units (mod- is located within the Anadyr Mountain Range in central ified after Nowaczyk et al., 2002) and major fault systems (compiled Chukotka/ Far East Russian Arctic. Today, the roughly cir- after Belyi and Belaya, 1998; Belyi and Raikevich, 1994) in the lake cular lake has a diameter of ∼ 12 km and a maximum wa- catchment, bathymetric contour lines in the lake (modified after Be- ter depth of 175 m (Nolan and Brigham-Grette, 2007; Melles lyi, 2001), and locations of lake floor and bedrock samples used in et al., 2007), filling the deepest part of the ∼ 18-km wide this study as well as of ICDP site 5011-1.; (1) Koekvun’ Formation (basalt, andesite-basalt, tuff, tuff-breccia, sandstone, tuff-siltstone), El’gygytgyn impact crater (Gurov et al., 2007). With a sur- 2 (2) Ergyvaam Formation (ignimbrite, tuff), (3) Pykarvaam Forma- face area of ∼ 110 km , the lake is fed by 50 ephemeral 2 tion (ignimbrite, tuff), (4) Voron’in Formation (ignimbrite, tuff), (5) streams draining a watershed area of 293 km defined by the dykes, stocks, and sills of subvolcanic rocks, (6) flood plain de- crater rim (Nolan et al., 2002; Fig.
Load more

Recommended publications
  • Russian Museums Visit More Than 80 Million Visitors, 1/3 of Who Are Visitors Under 18
    Moscow 4 There are more than 3000 museums (and about 72 000 museum workers) in Russian Moscow region 92 Federation, not including school and company museums. Every year Russian museums visit more than 80 million visitors, 1/3 of who are visitors under 18 There are about 650 individual and institutional members in ICOM Russia. During two last St. Petersburg 117 years ICOM Russia membership was rapidly increasing more than 20% (or about 100 new members) a year Northwestern region 160 You will find the information aboutICOM Russia members in this book. All members (individual and institutional) are divided in two big groups – Museums which are institutional members of ICOM or are represented by individual members and Organizations. All the museums in this book are distributed by regional principle. Organizations are structured in profile groups Central region 192 Volga river region 224 Many thanks to all the museums who offered their help and assistance in the making of this collection South of Russia 258 Special thanks to Urals 270 Museum creation and consulting Culture heritage security in Russia with 3M(tm)Novec(tm)1230 Siberia and Far East 284 © ICOM Russia, 2012 Organizations 322 © K. Novokhatko, A. Gnedovsky, N. Kazantseva, O. Guzewska – compiling, translation, editing, 2012 [email protected] www.icom.org.ru © Leo Tolstoy museum-estate “Yasnaya Polyana”, design, 2012 Moscow MOSCOW A. N. SCRiAbiN MEMORiAl Capital of Russia. Major political, economic, cultural, scientific, religious, financial, educational, and transportation center of Russia and the continent MUSEUM Highlights: First reference to Moscow dates from 1147 when Moscow was already a pretty big town.
    [Show full text]
  • Complete Production History 2018-2019 SEASON
    THEATER EMORY A Complete Production History 2018-2019 SEASON Three Productions in Rotating Repertory The Elaborate Entrance of Chad Deity October 23-24, November 3-4, 8-9 • Written by Kristoffer Diaz • Directed by Lydia Fort A satirical smack-down of culture, stereotypes, and geopolitics set in the world of wrestling entertainment. Mary Gray Munroe Theater We Are Proud to Present a Presentation About the Herero of Namibia, Formerly Known as Southwest Africa, From the German Südwestafrika, Between the Years 1884-1915 October 25-26, 30-31, November 10-11 • Written by Jackie Sibblies Drury • Directed by Eric J. Little The story of the first genocide of the twentieth century—but whose story is actually being told? Mary Gray Munroe Theater The Moors October 27-28, November 1-2, 6-7 • Written by Jen Silverman • Directed by Matt Huff In this dark comedy, two sisters and a dog dream of love and power on the bleak English moors. Mary Gray Munroe Theater Sara Juli’s Tense Vagina: an actual diagnosis November 29-30 • Written, directed, and performed by Sara Juli Visiting artist Sara Juli presents her solo performance about motherhood. Theater Lab, Schwartz Center for the Performing Arts The Tatischeff Café April 4-14 • Written by John Ammerman • Directed by John Ammerman and Clinton Wade Thorton A comic pantomime tribute to great filmmaker and mime Jacques Tati Mary Gray Munroe Theater 2 2017-2018 SEASON Midnight Pillow September 21 - October 1, 2017 • Inspired by Mary Shelley • Directed by Park Krausen 13 Playwrights, 6 Actors, and a bedroom. What dreams haunt your midnight pillow? Theater Lab, Schwartz Center for the Performing Arts The Anointing of Dracula: A Grand Guignol October 26 - November 5, 2017 • Written and directed by Brent Glenn • Inspired by the works of Bram Stoker and others.
    [Show full text]
  • Chekhov's Names 71 Creature-The Sea Gull," 14 As Nina Used to Be
    Chekhov's Nam.es JOHN P. PAULS The funny names, the droll expressions, the comic phrases he invented have passed into Russian speech ... 1 THE MASTERFUL AUTHOR of provincial frustration, A.P. Chekhov (1860-1904), regarded his unique lyrical plays of inaction as comedies, including his last masterpiece, The Cherry Orchard (1904). Yet, some American critics recently wrote of Uncle Vanya (1897), which Chekhov himself described as only "scenes from country life," as being "totally tragic." 2 Perhaps this superficial inconsistency could be answered by the casual yet valid statement of Slonim: And while the young humorist yielded to his gaiety, the mature writer evinced a melancholy tolerance of human frailties. 3 As in real life, so in Chekhov's plays, the comic goes hand in hand with the tragic, so well manifested earlier in Gogol's works ("laughter through tears"). Generally speaking, Chekhov's characters, though often pathetic, lack the dignity and stature of traditional tragic characters. They are frequently a mixture of pity and sympathetic ridicule, and can hardly qualify as being truly tragic. 4 The basic theme of Chekhov's subtle dramas is that the life of the provincial neurotic intelligentsia is dull, boring and frustrating, especially in view of the fact· that the characters lack the inner resources to escape the trifles of life, and to make their existence more rewarding. There is little excitement in routine work, in playing cards out of boredom, in bickering with the family, or in drinking vodka out of frustration. Long before Sherwood Anderson or Sinclair Lewis, Chekhov probed the dullness of middle-class life and described boredom as the most prevalent disease of modern times.
    [Show full text]
  • Selected Works of Lu Hsun
    7 =-t SELECTED 1{ORKS OF VO L[I ME FOU R Y,.rj\\r^r 1!a- r.-::4i r.ar\. SELECTED WORKS OF LU HSUN VOLUME FOUR i-, :'fir 4\. itr .y 2 Lu Hsun with his wife and son Taken in September 1933 FOREIGN LANGUAGES PRESS PEKING 1960 T EDITOR'S NOTE Translated by Yang Hsien-yi and Gladys Yang 'Ihe essays in this volume come from four collections: Frinqed Literature* and three volumes of Essays of Chieh.-chieh-ting. Fringed Literature, a collection of sixty-one essays written in 1934, was first published in 1936. The thirty- six essays in the first series of Essagrs of Chieh-chieh-ting were also written in 1934, the forty-eight in the second series in 1935, and the thirty-five in the third series in 1936. The three collections of Essays oJ Chieh-chieh-ting were all published in July 1937 after Lu Hsun's death, the first two having been edited by Lu Hsun, the last by his wife Hsu Kuang-ping. Between 1934 and 1936, when the essays in this volume were written, the spearhead of Japanese invasion had struck south from the northeastern provinces to Pe- king and Tientsin. On April 17, 1934, the Japanese imperialists openly declared that China belonged to their sphere of influence. In 1935, Ho Ying-chin signed the Ho-Umezu Agreement whereby the Kuomin- tang government substantially surrendered China's sovereign rights in the provinces of Hopei and Chahar. In November of the same year, the Japanese occupied Inner Mongolia and set up a puppet "autonomous gov- ernment" there.
    [Show full text]
  • Abstract Volume
    T I I II I II I I I rl I Abstract Volume LPI LPI Contribution No. 1097 II I II III I • • WORKSHOP ON MERCURY: SPACE ENVIRONMENT, SURFACE, AND INTERIOR The Field Museum Chicago, Illinois October 4-5, 2001 Conveners Mark Robinbson, Northwestern University G. Jeffrey Taylor, University of Hawai'i Sponsored by Lunar and Planetary Institute The Field Museum National Aeronautics and Space Administration Lunar and Planetary Institute 3600 Bay Area Boulevard Houston TX 77058-1113 LPI Contribution No. 1097 Compiled in 2001 by LUNAR AND PLANETARY INSTITUTE The Institute is operated by the Universities Space Research Association under Contract No. NASW-4574 with the National Aeronautics and Space Administration. Material in this volume may be copied without restraint for library, abstract service, education, or personal research purposes; however, republication of any paper or portion thereof requires the written permission of the authors as well as the appropriate acknowledgment of this publication .... This volume may be cited as Author A. B. (2001)Title of abstract. In Workshop on Mercury: Space Environment, Surface, and Interior, p. xx. LPI Contribution No. 1097, Lunar and Planetary Institute, Houston. This report is distributed by ORDER DEPARTMENT Lunar and Planetary institute 3600 Bay Area Boulevard Houston TX 77058-1113, USA Phone: 281-486-2172 Fax: 281-486-2186 E-mail: order@lpi:usra.edu Please contact the Order Department for ordering information, i,-J_,.,,,-_r ,_,,,,.r pA<.><--.,// ,: Mercury Workshop 2001 iii / jaO/ Preface This volume contains abstracts that have been accepted for presentation at the Workshop on Mercury: Space Environment, Surface, and Interior, October 4-5, 2001.
    [Show full text]
  • Elective English - III DENG202
    Elective English - III DENG202 ELECTIVE ENGLISH—III Copyright © 2014, Shraddha Singh All rights reserved Produced & Printed by EXCEL BOOKS PRIVATE LIMITED A-45, Naraina, Phase-I, New Delhi-110028 for Lovely Professional University Phagwara SYLLABUS Elective English—III Objectives: To introduce the student to the development and growth of various trends and movements in England and its society. To make students analyze poems critically. To improve students' knowledge of literary terminology. Sr. Content No. 1 The Linguist by Geetashree Chatterjee 2 A Dream within a Dream by Edgar Allan Poe 3 Chitra by Rabindranath Tagore 4 Ode to the West Wind by P.B.Shelly. The Vendor of Sweets by R.K. Narayan 5 How Much Land does a Man Need by Leo Tolstoy 6 The Agony of Win by Malavika Roy Singh 7 Love Lives Beyond the Tomb by John Clare. The Traveller’s story of a Terribly Strange Bed by Wilkie Collins 8 Beggarly Heart by Rabindranath Tagore 9 Next Sunday by R.K. Narayan 10 A Lickpenny Lover by O’ Henry CONTENTS Unit 1: The Linguist by Geetashree Chatterjee 1 Unit 2: A Dream within a Dream by Edgar Allan Poe 7 Unit 3: Chitra by Rabindranath Tagore 21 Unit 4: Ode to the West Wind by P B Shelley 34 Unit 5: The Vendor of Sweets by R K Narayan 52 Unit 6: How Much Land does a Man Need by Leo Tolstoy 71 Unit 7: The Agony of Win by Malavika Roy Singh 84 Unit 8: Love Lives beyond the Tomb by John Clare 90 Unit 9: The Traveller's Story of a Terribly Strange Bed by Wilkie Collins 104 Unit 10: Beggarly Heart by Rabindranath Tagore 123 Unit 11: Next Sunday by
    [Show full text]
  • Hearst Corporation Los Angeles Examiner Photographs, Negatives and Clippings--Portrait Files (A-F) 7000.1A
    http://oac.cdlib.org/findaid/ark:/13030/c84j0chj No online items Hearst Corporation Los Angeles Examiner photographs, negatives and clippings--portrait files (A-F) 7000.1a Finding aid prepared by Rebecca Hirsch. Data entry done by Nick Hazelton, Rachel Jordan, Siria Meza, Megan Sallabedra, and Vivian Yan The processing of this collection and the creation of this finding aid was funded by the generous support of the Council on Library and Information Resources. USC Libraries Special Collections Doheny Memorial Library 206 3550 Trousdale Parkway Los Angeles, California, 90089-0189 213-740-5900 [email protected] 2012 April 7000.1a 1 Title: Hearst Corporation Los Angeles Examiner photographs, negatives and clippings--portrait files (A-F) Collection number: 7000.1a Contributing Institution: USC Libraries Special Collections Language of Material: English Physical Description: 833.75 linear ft.1997 boxes Date (bulk): Bulk, 1930-1959 Date (inclusive): 1903-1961 Abstract: This finding aid is for letters A-F of portrait files of the Los Angeles Examiner photograph morgue. The finding aid for letters G-M is available at http://www.usc.edu/libraries/finding_aids/records/finding_aid.php?fa=7000.1b . The finding aid for letters N-Z is available at http://www.usc.edu/libraries/finding_aids/records/finding_aid.php?fa=7000.1c . creator: Hearst Corporation. Arrangement The photographic morgue of the Hearst newspaper the Los Angeles Examiner consists of the photographic print and negative files maintained by the newspaper from its inception in 1903 until its closing in 1962. It contains approximately 1.4 million prints and negatives. The collection is divided into multiple parts: 7000.1--Portrait files; 7000.2--Subject files; 7000.3--Oversize prints; 7000.4--Negatives.
    [Show full text]
  • ANTON CHEKHOV. to HIS SISTER. PETERSBURG, March 16
    1 2 A Life in Letters (Penguin Classics) Anton Chekhov 2 A Life in Letters (Penguin Classics) Books iRead http://booksiread.org http://apps.facebook.com/ireadit http://myspace.com/ireadit Title: Letters of Anton Chekhov Author: Anton Chekhov Translated by Con- stance Garnett Release Date: September, 2004 [EBook #6408] http://booksiread.org 3 [Yes, we are more than one year ahead of sched- ule] [This file was first posted on December 8, 2002] Edition: 10 Language: English Produced by Tom Allen, Charles Franks and the Online Distributed Proofreading Team. LETTERS OF ANTON CHEKHOV TO HIS FAM- ILY AND FRIENDS WITH BIOGRAPHICAL SKETCH TRANSLATED BY CONSTANCE GARNETT TRANSLATOR’S NOTE Of the eighteen hundred and ninety letters published by Chekhov’s family I have chosen for translation these letters and passages from letters which best to illustrate Chekhov’s life, character and opinions. The brief memoir is abridged and adapted from the biographical sketch by his brother Mihail. Chekhov’s letters to his 4 A Life in Letters (Penguin Classics) wife after his marriage have not as yet been published. BIOGRAPHICAL SKETCH In 1841 a serf belonging to a Russian noble- man purchased his freedom and the freedom of his family for 3,500 roubles, being at the rate of 700 roubles a soul, with one daughter, Alexan- dra, thrown in for nothing. The grandson of this serf was Anton Chekhov, the author; the son of the nobleman was Tchertkov, the Tol- stoyan and friend of Tolstoy. There is in this nothing striking to a Rus- sian, but to the English student it is sufficiently 5 6 A Life in Letters (Penguin Classics) significant for several reasons.
    [Show full text]
  • Mercury's Geochronology Revised by Applying Model Production Functions to Mariner 10 Data: Geological Implications
    Mercury’s geochronology revised by applying Model Production Functions to Mariner 10 data: geological implications Matteo Massironi1,2, Gabriele Cremonese3, Simone Marchi4, Elena Martellato2, Stefano Mottola5, Roland J. Wagner 5 1 Dipartimento di Geoscienze, Università di Padova, via Giotto 1, I-35137 Padova, Italy [email protected] 2 CISAS, Università di di Padova , Italy 3 INAF, Osservatorio Astronomico di Padova, Italy 4 Dipartimento di Astronomia, Università di Padova, Italy 5 German Aerospace Center (DLR), Institute of Planetary Research, Berlin, Germany Abstract Model Production Function chronology uses dynamic models of the Main Belt Asteroids (MBAs) and Near Earth Objects (NEOs) to derive the impactor flux to a target body. This is converted into the crater size-frequency-distribution for a specific planetary surface, and calibrated using the radiometric ages of different regions of the Moon’s surface. This new approach has been applied to the crater counts on Mariner 10 images of the highlands and of several large impact basins on Mercury. MPF estimates for the plains show younger ages than those of previous chronologies. Assuming a variable uppermost layering of the Hermean crust, the age of the Caloris interior plains may be as young as 3.59 Ga, in agreement with MESSENGER results that imply that long-term volcanism overcame contractional tectonics. The MPF chronology also suggests a variable projectile flux through time, coherent with the MBAs for ancient periods and then gradually comparable also to the NEOs. 1. Introduction From the middle 1960s onwards, the cratering records from planetary surfaces has been used to obtain age determinations for geological units and processes, as well as to make inferences about the time-dependent regimes of impactor fluxes throughout the Solar System.
    [Show full text]
  • Xerox University Microfilms 300 North Zeeb Road Ann Arbor, Michigan 46106 77-26,957 CORDELL, Bruce Monteith, 1949* TECTONISM and the INTERIOR of MERCURY
    TECTONISM AND THE INTERIOR OF MERCURY Item Type text; Dissertation-Reproduction (electronic) Authors Cordell, Bruce Monteith, 1949- Publisher The University of Arizona. Rights Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author. Download date 10/10/2021 18:31:37 Link to Item http://hdl.handle.net/10150/289613 INFORMATION TO USERS This material was produced from a microfilm copy of the original document. While the most advanced technological means to photograph and reproduce this document have been used, the quality is heavily dependent upon the quality of the original submitted. The following explanation of techniques is provided to help you understand markings or patterns which may appear on this reproduction. 1.The sign or "target" for pages apparently lacking from the document photographed is "Missing Page(s)". If it was possible to obtain the missing page(s) or section, they are spliced into the film along with adjacent pages. This may have necessitated cutting thru an image and duplicating adjacent pages to insure you complete continuity. 2. When an image on the film is obliterated with a large round black mark, it is an indication that the photographer suspected that the copy may have moved during exposure and thus cause a blurred image. You will find a good image of the page in the adjacent frame. 3. When a map, drawing or chart, etc., was part of the material being photographed the photographer followed a definite method in "sectioning" the material.
    [Show full text]
  • The Artist As Literary Character in the Works of Anton Chekhov
    THE ARTIST AS LITERARY CHARACTER IN THE WORKS OF ANTON CHEKHOV by Amber Jo Aulen A thesis submitted in conformity with the requirements for the degree of Doctor of Philosophy Department of Slavic Languages and Literatures University of Toronto Copyright by Amber J. Aulen 2018 ABSTRACT The Artist as Literary Character in the Work of Anton Chekhov Doctor of Philosophy 2017 Amber Jo Aulen Department of Slavic Languages and Literatures University of Toronto The present dissertation considers the methodology of Anton Chekhov’s literary ethics by focusing on the figure of the artist in his work. There are two general strategies he employs in depicting this figure. The first regards his engagement with typicality in characterizing the artist, and the second regards the reflexivity of the artist, which is to say the artist’s actions on the fictional plane draw attention to the author’s actions on the meta-fictional plane. The concern with typicality vis-à-vis the artist is more prominent in his earlier stories and is the focus of the first part of the dissertation. Chapter One addresses typicality in the genre of the physiologie in France and its Russian counterpart, the fiziologicheskii ocherk. This discussion lays the groundwork for Chapter Two, which addresses Chekhov’s move towards the complicated type in a trio of stories showcasing artists published in short succession in February 1886 – “An Actor’s Death” (“Akterskaia gibel’”), “Requiem” (“Panikhida”), and “Anyuta” (“Aniuta”). The reflexive quality of the figure of the artist, which we also find in the three aforementioned stories, is more prominent in Chekhov’s later stories and is the focus of the second part of the dissertation.
    [Show full text]
  • The Wisdom of Anton Chekhov
    Copyright © 2010 by Walter G. Moss THE WISDOM OF ANTON CHEKHOV Table of Contents (with links) CHEKHOV‟S LIFE AND TIMES ................................................................................. 3 Chekhov‟s Early Years and the Women in His Life................................................... 5 Years of Transition, 1886-1891 .................................................................................. 7 The Melikhovo Years, 1892-1898, and Helping Others ........................................... 14 The Moscow Art Theater, Olga, and Yalta, 1898-1904 ........................................... 21 CHEKHOV AND WISDOM ........................................................................................ 29 Chekhov‟s Beliefs and Values .................................................................................. 32 Faith, Hope, and Despair .......................................................................................... 40 Literature, Realism, Comedy, and Tragedy .............................................................. 45 Isolation, Women, Love, Sex, and Marriage ............................................................ 53 Social and Political Views ........................................................................................ 60 Environmental Views................................................................................................ 67 CONCLUSION AND LEGACY .................................................................................. 71 2 THE WISDOM OF ANTON CHEKHOV In his novel
    [Show full text]