DOCSLIB.ORG

Meteorites and Impact Structures in the Northern

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Meteorites and Impact Structures in the Northern NORTHERN TERRITORY GEOLOGICAL SURVEY JN Dunster, PW Haines and TJ Munson Meteorites and impact structures in the Northern Territory RECORD 2014-007 DEPARTMENT OF MINES AND ENERGY MINISTER: Hon Willem Westra van Holthe MLA CHIEF EXECUTIVE: Scott Perkins NORTHERN TERRITORY GEOLOGICAL SURVEY EXECUTIVE DIRECTOR: Ian Scrimgeour JN Dunster, PW Haines and TJ Munson NTGS Record 2014-007. Meteorites and impact structures in the Northern Territory BIBLIOGRAPHIC REFERENCE: Dunster JN, Haines PW and Munson TJ, 2014. Meteorites and impact structures in the Northern Territory. Northern Territory Geological Survey, Record 2014-007. (Record / Northern Territory Geological Survey ISSN 1443–1149) Bibliography ISBN (DVD): 978-0-7245-7277-9 ISBN (Web): 978-0-7245-7276-2 Keywords: ataxitic texture, chondrite, impact crater, impactite, impact structure, iron meteorites, kamacite, meteorite, Neumann bands, pallasite, schreibersite, shatter cones, shock metamorphism, stony irons, taenite, tektites, troilite, Widmanstätten pattern, Alikatnima, Amelia Creek, Arltunga, Barramundi, Basedow Range, Bond Springs, Boxhole, Burt Plain, Calvert Hills, Cleanskin, Eagles Nest, Erldunda, Eurowie Creek, Foelsche, Gallipoli Station No. 1, Gallipoli Station No. 2, Glen Helen, Gosses Bluff, Gove, Goyder, Gulpuliyul, Hart Range, Henbury, Huckitta, Kelly West, Kurinelli , Liverpool, Maningrida, Matt Wilson, Mount Sir Charles, Nutwood Downs, Poeppel Corner, Puka, Rabbit Flat, Renehan, Roper River, Sheridan Creek, Spear Creek, Spring Range, Strangways, Tawallah Valley, Wessel, Yenberrie. EDITOR: GC MacDonald Northern Territory Geological Survey 3rd floor Paspalis Centrepoint Building Arid Zone Research Institute Smith Street Mall, Darwin South Stuart Highway, Alice Springs GPO Box 4550 PO Box 8760 Darwin NT 0801, Australia Alice Springs NT 0871, Australia For further information contact: Minerals and Energy InfoCentre Phone: +61 8 8999 6443 Website: http://www.minerals.nt.gov.au/ntgs Email: [email protected] © Northern Territory Government October 2014 Cover illustration: simulation of meteorite descending to impact NT (Top image: after Google earth, Data SIO, NOAA, US Navy, NHA, GEBCO, Image Landsat 2014. Bottom image: Gosses Bluff, after Google earth, DigitalGlobe, CNES/Astrium 2014). Disclaimer While all care has been taken to ensure that information contained in this publication is true and correct at the time of publication, changes in circumstances after the time of publication may impact on the accuracy of its information. The Northern Territory of Australia gives no warranty or assurance, and makes no representation as to the accuracy of any information or advice contained in this publication, or that it is suitable for your intended use. You should not rely upon information in this publication for the purpose of making any serious business or investment decisions without obtaining independent and/or professional advice in relation to your particular situation. The Northern Territory of Australia disclaims any liability or responsibility or duty of care towards any person for loss or damage caused by any use of, or reliance on the information contained in this publication. NTGS Record 2014-007 ii CONTENTS FIGURES Summary ...........................................................................v 1. Location of meteorites, impact structures and circular Introduction ......................................................................1 features of unknown affinity in the NT ..................... 2 History ...............................................................................1 2. Amelia Creek impact structure. (a) satelline image. Modern recognition of impact craters ............................1 (b) Aeromagnietic anomaly ...................................... 4 Meteorites and impact structures of the NT ..................2 3. Geological map of the Amelia Creek impact Known meteorites and impact structures of the NT .....4 structure. .................................................................... 5 Alikatnima meteorite (1) ...............................................4 4. Amelia Creek shatter cones ....................................... 5 Amelia Creek (2) ...........................................................4 5. Boxhole impact crater. (a) Satellite image. (b) Impact Arltunga meteorite (3) ...................................................6 structure geology map ................................................ 7 Basedow Range meteorite (4) .......................................6 6. Boxhole iron meteorite fragment ............................... 8 Bond Springs meteorite (5) ...........................................6 7. Cleanskin shatter cones in sandstone ........................ 9 Boxhole (Dneiper) crater and meteorites (6) ................6 8. Photomicrograph of multiple planar fractures with Burt Plain meteorite (7) ................................................8 feather features in quartz ........................................... 9 Cleanskin impact structure (8) .....................................9 9. Cleanskin impact structure. (a) Satellite image. Eagles Nest meteorite (no location) ............................11 (b) Impact structure geology map ............................ 10 Erldunda meteorite (9) ................................................11 10. Foelsche impact crater. (a) Satellite image. Foelsche impact structure (10) ....................................11 (b) Circular aeromagnetic anomaly ......................... 11 Gallipoli Station No. 1 meteorite (no location) ...........12 11. Foelsche impact crater. Shock lamellae in Bukalara Gallipoli Station No.2 meteorite (11) ..........................12 Sandstone ................................................................. 12 Glen Helen meteorite (12) ...........................................13 12. Gallipoli Station No.2 meteorite fragments ............. 12 Gosses Bluff (Tnorala) impact structure (13) .............13 13. Gallipoli Station No.2 polished slab ........................ 13 Gove meteorite (14) .....................................................16 14. Gallipoli Station No.2. photomicrograph of polished Goyder impact structure (15) ......................................17 section ...................................................................... 13 Hart (or Harts) Range meteorite (16) ..........................17 15. Gosses Bluff impact structure. (a) Satellite image. Henbury (Tatjakapara) craters and meteorites (17) ....17 (b) Residual gravity map.......................................... 14 Huckitta meteorite (18) ...............................................21 16. Gosses Bluff impact structure ................................. 15 Kelly West impact structure (19) ................................22 17. Geological sketch map of Gosses Bluff impact Kurinelli meteorites (20) .............................................22 structure ................................................................... 15 Liverpool impact crater (21) ........................................24 18. Gosses Bluff shatter cones ....................................... 16 Matt Wilson impact structure (22)..............................24 19. Goyder impact structure. (a) Satellite image. Mount Sir Charles meteorite (23) ...............................27 (b) Impact structure simplified geology ................... 18 Nutwood Downs meteorite (no location) ....................27 20. Henbury impact structures ...................................... 19 Poeppel Corner meteorite (24) ....................................28 21. Henbury impact structure. (a) Radiometric anomaly Rabbit Flat meteorite (25) ...........................................28 for potassium. (b) Satellite image ............................ 20 Roper River meteorite (26) .........................................28 22. Henbury meteorite fragments .................................. 20 Strangways impact structure (27) ...............................28 23. Huckitta meteorite in situ ........................................ 21 Tawallah Valley meteorite (28) ...................................28 24. Huckitta meteorite polished samples. (a) Close-up of Yenberrie meteorite (29) .............................................30 polished surface. (b) Fragment ................................ 21 Possible impact structures .............................................30 25. Kelly West impact structures. (a) Satellite image. Calvert Hills structure (A) ..........................................30 (b) Impact structure geology ................................... 23 Gulpuliyul structure (B) .............................................31 26. Kurinelli weathered iron meteorite sample ............. 24 Maningrida structure (C) ............................................31 27. Liverpool impact crater. (a) Satellite image. Renehan structure (D) .................................................31 (b) Impact structure geology ................................... 25 Wessel structure (E) ....................................................34 28. Matt Wilson impact structure. (a) Satellite image. Circular structures of unknown affinity ......................34 (b) Impact structure geology ................................... 26 Barramundi circular structure (I) ...............................34 29. Matt Wilson impact structure outcrop photographs Eurowie Creek circular structure (II) .........................34 (a) Closely spaced fractures in Wondoan Hill Formation Puka circular structure (III)........................................35
Load more

Recommended publications
  • RESALE Numberor Stating You Are a Retailor In
    TucsonAuction08.html 9th Annual Tucson Meteorite Auction ----------------------------- Tucson Meteorite Auction 2008 Saturday, February 9th, 2008 Bidding starts 7:30PM Sharp Viewing & Socializing begins 5:30PM Food and Drink available http://www.michaelbloodmeteorites.com/TucsonAuction08.html (1 z 36) [2008-05-28 18:09:44] TucsonAuction08.html (Please drink only with a designated driver) ----------------------- While in Tucson I will have a cell phone: (619) 204-4138 (Feb2-Feb10) NEW LOCATION VFW Hall (Post # 549) 1884 So. Craycroft, Tucson, AZ 85711 (see directions below) NOTE: Click HERE for printer friendly copy of this catalog (Click on any photo to see a greatly enlarged image) 1 AH 1 Claxton L6, GeorgiaDecember 10 th , 1984 - Hit A Mailbox! .992g Rim Crusted Part Slice (21mm X 20mm X 2mm) No Minimum 2 AH 2 Dhofar 908 Lunar Meteorite - Rosetta - 1.242g Full Slice (24mm X 16mm X 2mm) No Minaimum - (est: $2.5K min) 3 AH 3 NWA 2999 Angrite Famous Paper "The Case For Samples From Mercury" 3.216g FC End Piece (18mm X 15mm X 7mm) No Minimum http://www.michaelbloodmeteorites.com/TucsonAuction08.html (2 z 36) [2008-05-28 18:09:44] TucsonAuction08.html 4 AH 4 NWA 4473 Polymict Diogenite 13g Full Slice(70mm X 13mm X ~2.5mm) No Minimum 5 AH 5 NWA 4880 (Shergottite) .540g 70% F Crusted Whole Stone (11mm X 9mm X 5mm) No Minimum 6 AH 6 NWA 4880 (Shergottite) 32.3g 92% FC Oriented Main Mass (35mm X 32mm X 32mm) Minimum Bid: $12,900.00 (Less Than $400/g) 7 AH 7 Oued el Hadjar (LL6) Fall March 1986 - "The Wedding Stone" 6.322 g (41mm X 30m X 3mm) The stone was broken into many pieces, then sacrificed on an alter during a wedding ceremony.
    [Show full text]
  • Zinc and Copper Isotopic Fractionation During Planetary Differentiation Heng Chen Washington University in St
    Washington University in St. Louis Washington University Open Scholarship Arts & Sciences Electronic Theses and Dissertations Arts & Sciences Winter 12-15-2014 Zinc and Copper Isotopic Fractionation during Planetary Differentiation Heng Chen Washington University in St. Louis Follow this and additional works at: https://openscholarship.wustl.edu/art_sci_etds Part of the Earth Sciences Commons Recommended Citation Chen, Heng, "Zinc and Copper Isotopic Fractionation during Planetary Differentiation" (2014). Arts & Sciences Electronic Theses and Dissertations. 360. https://openscholarship.wustl.edu/art_sci_etds/360 This Dissertation is brought to you for free and open access by the Arts & Sciences at Washington University Open Scholarship. It has been accepted for inclusion in Arts & Sciences Electronic Theses and Dissertations by an authorized administrator of Washington University Open Scholarship. For more information, please contact [email protected]. WASHINGTON UNIVERSITY IN ST. LOUIS Department of Earth and Planetary Sciences Dissertation Examination Committee: Bradley L. Jolliff, Chair Jeffrey G. Catalano Bruce Fegley, Jr. Michael J. Krawczynski Frédéric Moynier Zinc and Copper Isotopic Fractionation during Planetary Differentiation by Heng Chen A dissertation presented to the Graduate School of Arts & Sciences of Washington University in partial fulfillment of the requirements for the degree of Doctor of Philosophy December 2014 St. Louis, Missouri Copyright © 2014, Heng Chen All rights reserved. Table of Contents LIST OF FIGURES
    [Show full text]
  • Chapter 6 Lawn Hill Megabreccia
    Chapter 6 Lawn Hill Megabreccia Chapter 6 Catastrophic mass failure of a Middle Cambrian platform margin, the Lawn Hill Megabreccia, Queensland, Australia Leonardo Feltrin 6-1 Chapter 6 Lawn Hill Megabreccia Acknowledgement of Contributions N.H.S. Oliver – normal supervisory contributions Leonardo Feltrin 6-2 Chapter 6 Lawn Hill Megabreccia Abstract Megabreccia and related folds are two of the most spectacular features of the Lawn Hill Outlier, a small carbonate platform of Middle Cambrian age, situated in the northeastern part of the Georgina Basin, Australia. The megabreccia is a thick unit (over 200 m) composed of chaotic structures and containing matrix-supported clasts up to 260 m across. The breccia also influenced a Mesoproterozoic basement, which hosts the world class Zn-Pb-Ag Century Deposit. Field-studies (undertaken in the mine area), structural 3D modelling and stable isotopic data were used to assess the origin and timing of the megabreccia, and its relationship to the tectonic framework. Previous workers proposed the possible linkage of the structural disruption to an asteroid impact, to justify the extremely large clasts and the conspicuous basement interaction. However, the megabreccia has comparable clast size to some of the largest examples of sedimentary breccias and synsedimentary dyke intrusions in the world. Together with our field and isotope data, the reconstruction of the sequence of events that led to the cratonization of the Centralian Superbasin supports a synsedimentary origin for the Lawn Hill Megabreccia. However, later brittle faulting and veining accompanying strain localisation within the Thorntonia Limestones may represent post-sedimentary, syntectonic deformation, possibly linked to the late Devonian Alice Springs Orogeny.
    [Show full text]
  • October 2013
    October 2013 Alice Springs Field Naturalists Club Newsletter Little Eagle landing – Henbury Station. Photo by Pete Nunn. Meetings are held on the second Wednesday of each month (except December & January) at 7:00 PM at Higher Education Postal Address: P.O. Box 8663 Building at Charles Darwin University. Visitors are welcome. Alice Springs, Northern Territory 0871 CONTENTS Web site : http://www.alicefieldnaturalists.org.au Meetings...p2 Trips/Activities...p2 Contacts...p2 Notes and Reminders...p3 Henbury Weekend Trip…p4 Santa Teresa Road …p9 Daisy Guide…p10 Slot Gorge Walk…p11 Wigley’s to OTS…p11 A Tribute to Kevin Boyle… p12 NEXT NEWSLETTER The deadline for the next newsletter is Friday 25 October 2013 . Please send your contributions to Barb Gilfedder at the email listed below – Note: new email address! Please send photos and text separately. ALICE SPRINGS FIELD NATURALISTS CLUB Wed 9 Oct Meeting 7.00pm at Charles Darwin University Higher Education Building lecture theatre. Speaker: Peter Jobson , “ Joseph Hooker Down Under: A tale of high seas adventure and profound botanical discovery.” Joseph Hooker (2 nd Director of Kew Gardens) and son of the William Hooker, the First Director of Kew Gardens, was considered one of the leading botanist of the 19 th Century. He was a lifelong friend of Charles Darwin & was influential in encouraging Bentham to write Flora Australiensis. This talk will be full of information, but light hearted as well . Sat 12 Oct Drive and look at plants and birds along the Tanami track as far as Old Hamilton Downs road. Meet at the Sargent Street sign on North Stuart Highway at 6.30am.
    [Show full text]
  • Australian Aborigines and Meteorites
    Records of the Western Australian Museum 18: 93-101 (1996). Australian Aborigines and meteorites A.W.R. Bevan! and P. Bindon2 1Department of Earth and Planetary Sciences, 2 Department of Anthropology, Western Australian Museum, Francis Street, Perth, Western Australia 6000 Abstract - Numerous mythological references to meteoritic events by Aboriginal people in Australia contrast with the scant physical evidence of their interaction with meteoritic materials. Possible reasons for this are the unsuitability of some meteorites for tool making and the apparent inability of early Aborigines to work metallic materials. However, there is a strong possibility that Aborigines witnessed one or more of the several recent « 5000 yrs BP) meteorite impact events in Australia. Evidence for Aboriginal use of meteorites and the recognition of meteoritic events is critically evaluated. INTRODUCTION Australia, although for climatic and physiographic The ceremonial and practical significance of reasons they are rarely found in tropical Australia. Australian tektites (australites) in Aboriginal life is The history of the recovery of meteorites in extensively documented (Baker 1957 and Australia has been reviewed by Bevan (1992). references therein; Edwards 1966). However, Within the continent there are two significant areas despite abundant evidence throughout the world for the recovery of meteorites: the Nullarbor that many other ancient civilizations recognised, Region, and the area around the Menindee Lakes utilized and even revered meteorites (particularly of western New South Wales. These accumulations meteoritic iron) (e.g., see Buchwald 1975 and have resulted from prolonged aridity that has references therein), there is very little physical or allowed the preservation of meteorites for documentary evidence of Aboriginal acknowledge­ thousands of years after their fall, and the large ment or use of meteoritic materials.
    [Show full text]
  • Phylogenetic Structure of Vertebrate Communities Across the Australian
    Journal of Biogeography (J. Biogeogr.) (2013) 40, 1059–1070 ORIGINAL Phylogenetic structure of vertebrate ARTICLE communities across the Australian arid zone Hayley C. Lanier*, Danielle L. Edwards and L. Lacey Knowles Department of Ecology and Evolutionary ABSTRACT Biology, Museum of Zoology, University of Aim To understand the relative importance of ecological and historical factors Michigan, Ann Arbor, MI 48109-1079, USA in structuring terrestrial vertebrate assemblages across the Australian arid zone, and to contrast patterns of community phylogenetic structure at a continental scale. Location Australia. Methods We present evidence from six lineages of terrestrial vertebrates (five lizard clades and one clade of marsupial mice) that have diversified in arid and semi-arid Australia across 37 biogeographical regions. Measures of within-line- age community phylogenetic structure and species turnover were computed to examine how patterns differ across the continent and between taxonomic groups. These results were examined in relation to climatic and historical fac- tors, which are thought to play a role in community phylogenetic structure. Analyses using a novel sliding-window approach confirm the generality of pro- cesses structuring the assemblages of the Australian arid zone at different spa- tial scales. Results Phylogenetic structure differed greatly across taxonomic groups. Although these lineages have radiated within the same biome – the Australian arid zone – they exhibit markedly different community structure at the regio- nal and local levels. Neither current climatic factors nor historical habitat sta- bility resulted in a uniform response across communities. Rather, historical and biogeographical aspects of community composition (i.e. local lineage per- sistence and diversification histories) appeared to be more important in explaining the variation in phylogenetic structure.
    [Show full text]
  • March 21–25, 2016
    FORTY-SEVENTH LUNAR AND PLANETARY SCIENCE CONFERENCE PROGRAM OF TECHNICAL SESSIONS MARCH 21–25, 2016 The Woodlands Waterway Marriott Hotel and Convention Center The Woodlands, Texas INSTITUTIONAL SUPPORT Universities Space Research Association Lunar and Planetary Institute National Aeronautics and Space Administration CONFERENCE CO-CHAIRS Stephen Mackwell, Lunar and Planetary Institute Eileen Stansbery, NASA Johnson Space Center PROGRAM COMMITTEE CHAIRS David Draper, NASA Johnson Space Center Walter Kiefer, Lunar and Planetary Institute PROGRAM COMMITTEE P. Doug Archer, NASA Johnson Space Center Nicolas LeCorvec, Lunar and Planetary Institute Katherine Bermingham, University of Maryland Yo Matsubara, Smithsonian Institute Janice Bishop, SETI and NASA Ames Research Center Francis McCubbin, NASA Johnson Space Center Jeremy Boyce, University of California, Los Angeles Andrew Needham, Carnegie Institution of Washington Lisa Danielson, NASA Johnson Space Center Lan-Anh Nguyen, NASA Johnson Space Center Deepak Dhingra, University of Idaho Paul Niles, NASA Johnson Space Center Stephen Elardo, Carnegie Institution of Washington Dorothy Oehler, NASA Johnson Space Center Marc Fries, NASA Johnson Space Center D. Alex Patthoff, Jet Propulsion Laboratory Cyrena Goodrich, Lunar and Planetary Institute Elizabeth Rampe, Aerodyne Industries, Jacobs JETS at John Gruener, NASA Johnson Space Center NASA Johnson Space Center Justin Hagerty, U.S. Geological Survey Carol Raymond, Jet Propulsion Laboratory Lindsay Hays, Jet Propulsion Laboratory Paul Schenk,
    [Show full text]
  • ELEMENTAL ABUNDANCES in the SILICATE PHASE of PALLASITIC METEORITES Redacted for Privacy Abstract Approved: Roman A
    AN ABSTRACT OF THE THESIS OF THURMAN DALE COOPER for theMASTER OF SCIENCE (Name) (Degree) in CHEMISTRY presented on June 1, 1973 (Major) (Date) Title: ELEMENTAL ABUNDANCES IN THE SILICATE PHASE OF PALLASITIC METEORITES Redacted for privacy Abstract approved: Roman A. Schmitt The silicate phases of 11 pallasites were analyzed instrumen- tally to determine the concentrations of some major, minor, and trace elements.The silicate phases were found to contain about 98% olivine with 1 to 2% accessory minerals such as lawrencite, schreibersite, troilite, chromite, and farringtonite present.The trace element concentrations, except Sc and Mn, were found to be extremely low and were found primarily in the accessory phases rather than in the pure olivine.An unusual bimodal Mn distribution was noted in the pallasites, and Eagle Station had a chondritic nor- malized REE pattern enrichedin the heavy REE. The silicate phases of pallasites and mesosiderites were shown to be sufficiently diverse in origin such that separate classifications are entirely justified. APPROVED: Redacted for privacy Professor of Chemistry in charge of major Redacted for privacy Chairman of Department of Chemistry Redacted for privacy Dean of Graduate School Date thesis is presented June 1,1973 Typed by Opal Grossnicklaus for Thurman Dale Cooper Elemental Abundances in the Silicate Phase of Pallasitic Meteorites by Thurman Dale Cooper A THESIS submitted to Oregon State University in partial fulfillment of the requirements for the degree of Master of Science June 1974 ACKNOWLEDGMENTS The author wishes to express his gratitude to Prof. Roman A. Schmitt for his guidance, suggestions, discussions, and thoughtful- ness which have served as an inspiration.
    [Show full text]
  • N Arieuican%Mllsellm
    n ARieuican%Mllsellm PUBLISHED BY THE AMERICAN MUSEUM OF NATURAL HISTORY CENTRAL PARK WEST AT 79TH STREET, NEW YORK 24, N.Y. NUMBER 2I63 DECEMBER I9, I963 The Pallasites BY BRIAN MASON' INTRODUCTION The pallasites are a comparatively rare type of meteorite, but are remarkable in several respects. Historically, it was a pallasite for which an extraterrestrial origin was first postulated because of its unique compositional and structural features. The Krasnoyarsk pallasite was discovered in 1749 about 150 miles south of Krasnoyarsk, and seen by P. S. Pallas in 1772, who recognized these unique features and arranged for its removal to the Academy of Sciences in St. Petersburg. Chladni (1794) examined it and concluded it must have come from beyond the earth, at a time when the scientific community did not accept the reality of stones falling from the sky. Compositionally, the combination of olivine and nickel-iron in subequal amounts clearly distinguishes the pallasites from all other groups of meteorites, and the remarkable juxtaposition of a comparatively light silicate mineral and heavy metal poses a nice problem of origin. Several theories of the internal structure of the earth have postulated the presence of a pallasitic layer to account for the geophysical data. No apology is therefore required for an attempt to provide a comprehensive account of this remarkable group of meteorites. Some 40 pallasites are known, of which only two, Marjalahti and Zaisho, were seen to fall (table 1). Of these, some may be portions of a single meteorite. It has been suggested that the pallasite found in Indian mounds at Anderson, Ohio, may be fragments of the Brenham meteorite, I Chairman, Department of Mineralogy, the American Museum of Natural History.
    [Show full text]
  • Assessment Report 84
    ASSESSMENT REPORT 84 NOLANS PROJECT ARAFURA RESOURCES LTD December 2017 Assessment Report 84 Environmental Impact Assessment Process Timelines Date Process 03/2008 Receipt of Notice of Intent – Nolans Rare Earth Project Minister for Natural Resources, Environment and Heritage decision – 25/05/2008 Environmental Impact Statement (EIS) required 10/12/2014 Receipt of clause 14A notification (amended NOI) – Nolans Project 23/12/2014 NT EPA decision on clause 14A notification – EIS required 29/05/2015 Terms of Reference issued to Proponent 27/05/2016 Draft EIS for the Project released for public comment 26/08/2016 NT EPA direction to prepare EIS Supplement issued 31/10/2017 EIS Supplement received 21/12/2017 Assessment Report issued Dr Paul Vogel Chairman 21 December 2017 Northern Territory Environment Protection Authority GPO Box 3675 Darwin Northern Territory 0801 © Northern Territory Environment Protection Authority 2017 Important Disclaimer This document has been prepared with all due diligence and care, based on the best available information at the time of publication. Any decisions made by other parties based on this document are solely the responsibility of those parties. The Northern Territory Environment Protection Authority and Northern Territory of Australia do not warrant that this publication, or any part of it, is correct or complete. To the extent permitted by law, the Northern Territory Environment Protection Authority and Northern Territory of Australia (including their employees and agents) exclude all liability to any person for any consequences, including but not limited to all losses, damages, costs, expenses and other compensation, arising directly or indirectly from using, in part or in whole, any information or material contained in this publication.
    [Show full text]
  • Appendix a Recovery of Ejecta Material from Confirmed, Probable
    Appendix A Recovery of Ejecta Material from Confirmed, Probable, or Possible Distal Ejecta Layers A.1 Introduction In this appendix we discuss the methods that we have used to recover and study ejecta found in various types of sediment and rock. The processes used to recover ejecta material vary with the degree of lithification. We thus discuss sample processing for unconsolidated, semiconsolidated, and consolidated material separately. The type of sediment or rock is also important as, for example, carbonate sediment or rock is processed differently from siliciclastic sediment or rock. The methods used to take and process samples will also vary according to the objectives of the study and the background of the investigator. We summarize below the methods that we have found useful in our studies of distal impact ejecta layers for those who are just beginning such studies. One of the authors (BPG) was trained as a marine geologist and the other (BMS) as a hard rock geologist. Our approaches to processing and studying impact ejecta differ accordingly. The methods used to recover ejecta from unconsolidated sediments have been successfully employed by BPG for more than 40 years. A.2 Taking and Handling Samples A.2.1 Introduction The size, number, and type of samples will depend on the objective of the study and nature of the sediment/rock, but there a few guidelines that should be followed regardless of the objective or rock type. All outcrops, especially those near industrialized areas or transportation routes (e.g., highways, train tracks) need to be cleaned off (i.e., the surface layer removed) prior to sampling.
    [Show full text]
  • Ensisheim 2001 Ensisheim 2001
    BIULETYN MI£ONIKÓW METEORYTÓW METEORYTMETEORYT Nr 3 (39) Wrzesieñ 2001 Ensisheim 2001 2/2001 METEORYT str. 1 Od redaktora: Meteoryt (ISSN 1642-588X) biuletyn dla mi³oników me- Pytanie, dlaczego jedne okazy Gibeona maj¹ wyraziste figury teorytów wydawany przez Widmanstättena, a inne nie, drêczy³o mnie od dawna, szczególnie Olsztyñskie Planetarium i Ob- gdy sprowadza³em okaz z nadziej¹ na uzyskanie efektownych figur serwatorium Astronomiczne, na przekrojach, a okazywa³o siê, ¿e prawie nic nie widaæ. Dlatego Muzeum Miko³aja Kopernika z ogromnym zainteresowaniem przeczyta³em artyku³ Dietricha we Fromborku i Pallasite Press i Königa i polecam go ka¿demu kolekcjonerowi. Gibeona znaj¹ wydawcê kwartalnika Mete- przecie¿ wszyscy, nieprawda¿? orite! z którego pochodzi wiêk- sza czêæ publikowanych mate- Historia poszukiwañ meteorytu Tagish Lake ci¹gnie siê jak ria³ów. brazylijski serial, ale poniewa¿ zacz¹³em j¹ t³umaczyæ, wiêc chcê skoñczyæ. Sk¹d mog³em przypuszczaæ, ¿e zrobi¹ z tego taki tasie- Redaguje Andrzej S. Pilski miec? Na szczêcie w nastêpnym numerze ma byæ koniec. Sk³ad: Jacek Dr¹¿kowski Nasi kolekcjonerzy meteorytów zaczêli pojawiaæ siê na euro- Druk: Jan, Lidzbark Warm. pejskich targach meteorytowych, a dosz³y mnie wieci, ¿e na Adres redakcji: tegorocznych targach w Gifhorn bêdzie tak¿e polskie stoisko. skr. poczt. 6 Tymczasem zapraszam na relacjê z targów w Ensisheim, gdzie 14-530 Frombork warto siê wybraæ, by zobaczyæ najstarszy europejski meteoryt, tel. 0-55-243-7392 którego spadek obserwowano. Tym, którym za daleko na zagra- e-mail: [email protected] niczne targi, proponujê spotkania na gie³dach w £odzi i Gliwi- Biuletyn wydawany jest kwartal- cach.
    [Show full text]