Geological and laboratory analysis of rock samples from the Ruppert Coast-Hobb Coast, Marie Byrd Land, Kohler Range and Bear Peninsula to understand the Mesozoic Pacific ocean during Gondwanaland breakup

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Title: Geological and laboratory analysis of rock samples from the Ruppert Coast-Hobb Coast, Marie Byrd Land, Kohler Range and Bear Peninsula to understand the Mesozoic Pacific ocean during Gondwanaland breakup
Description:
Abstract:
Prior to the breakup of Gondwanaland there was an entire southern rim to the Pacific extending from New Calendonia through New Zealand, West Antarctica to Patagonia. Understanding the Mesozoic tectonics of West Antarctica is pivotal to understanding much of the geology of New Zealand and southern South America. A joint collaboration between NZARP, BAS and the USAP undertook fieldwork over three field seasons.The first field season involved the examination and sampling of all available basement outcrops in the Ruppert Coast-Hobb Coast area. The second season sampled in the Pine Island Bay area which lies on the boundary between the Marie Byrd Land and Thurston Island crustal blocks. The party was based on the US Coast Guard icebreaker 'Polar Sea' and employed the ship's helicopter and small boats to gain access to all available outcrops (Mt Siple, Cape Felt, Pine Island Bay and associated islands, Thurston Island and Peter I Island). The third and final season areas in the Kohler Range, Bear Peninsula and the basement of the Murphy volcano were studied and sampled with approximately 3000lbs of rock collected for analysis. Tracing the nature and timing of the break up process during the last 100 million years in Marie Byrd Land will contribute to the understanding of the geology of New Zealand, particularly the Campbell Plateau and the Chatham Rise. Detailed laboratory analysis of major elements, trace elements, isotope geochemistry, geochronology by the Rb/Sr, U/Pb, and Ar40/Ar39 methods, and paleomagnetism were completed on rock samples. Because of the bad weather and difficult access, the geology of Marie Byrd Land was not well know but it is vital for understanding the southern margin of the Mesozoic Pacific ocean and the pattern of events during breakup of the Pacific sector of Gondwana.
Purpose:
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Supplemental_Information:
REFERENCE: Bradshaw, J.D. Dalziel, I.W.D. Di Venere, V. Mukasa, S. Pankhurst, R.B. Storey, B.C. Weaver, S.D. The southern rim of the Pacific: new work on the Pre-Cenozoic rocks of Marie Byrd Land. in: Sixth International Symposium on Antarctic Earth Sciences. Tokyo: National Institute for Polar Research. 1991. pp.80-82 Bradshaw, J.D. Weaver, S.D. Pankhurst, R.J. Dalziel, I.W.D. Grunow, A.M. Mukasa, S.B. The southern rim of the Pacific Ocean: preliminary geologic report of the Amundsen Sea, 12 February - 21 March 1992. Antarctic journal of the United States 27(2): 11-13, 1992. Bradshaw, J.D. Pankhurst, R.J. Weaver, S.D. Storey, B.C. Muir, R.J. Ireland, T. The Mesozoic continental margin: Carboniferous-Mesozoic arc terranes in West Antarctica, New Zealand and Australia. in: Mesozoic 96/Mesozoic Geology of the Eastern Australia Plate Conference, 23-26 September 1996, Sheraton Brisbane Hotel & Tower, Queensland, Australia. Brisbane: Geological Society of Australia. 1996. pp.114-123 Bradshaw, J.D. Pankhurst, R.J. Weaver, S.D. Storey, B.C. Muir, R.J. Ireland, T. New Zealand superterranes recognized in Marie Byrd Land and Thurston Island. in: Antarctic region: geological evolution and processes; proceedings of the 7th Symposium on Antarctic Geological Sciences, Sienna, Sept 10-15, 1995.Ricci C.A. (ed) Sienna: Terra Antartica Publications. 1997. pp.435-436 Bradshaw, J.D. Weaver, S.D. Storey, B.C. Pankhurst, R.J. Geotectonic events and terranes of the southern margin of the Pacific: diachronous response to oblique motions. in: Terrane-dynamics - 97, 7th International Conference on Terrane Geology, Christchurch, N.Z.Bradshaw J.D. Weaver S.D. (eds) Christchurch: University of Canterbury. 1997. pp.26-29 Bradshaw, J.D. Weaver, S.D. (eds) Terrane-dynamics - 97, 7th International Conference on Terrane Geology, Christchurch, N.Z. Christchurch: University of Canterbury. 1997. Di Venere, V. Bradshaw, J.D. Weaver, S.D. Palais, D.G. Pankhurst, R.J. Storey, B.C. Geological investigations in eastern Marie Byrd Land, West Antarctica. Antarctic journal of the United States 28(5): 5-6, 1993. Ireland, T.R. Gibson, G. Bradshaw, J.D. Weaver, S.D. Development of the Gondwana margin: examples from New Zealand and Marie Byrd Land. in: Terrane-dynamics - 97, 7th International Conference on Terrane Geology, Christchurch, N.Z.Bradshaw J.D. Weaver S.D. (eds) Christchurch: University of Canterbury. 1997. pp.79-80 Muir, R.J. Ireland, T.R. Weaver, S.D. Bradshaw, J.D. Ion microprobe dating of Paleozoic granitoids: Devonian magmatism in New Zealand and correlations with Australia and Antarctica. Chemical geology 127(1-3): 191-210, 1996. Pankhurst, R.J. Weaver, S.D. Bradshaw, J.D. Storey, B.C. Ireland, T.R. Geochronology and geochemistry of pre-Jurassic superterranes in Marie Byrd Land, Antarctica. Journal of geophysical research 103(B10): 2529-2547, 1998. Storey, B.C. Pankhurst, R.J. Millar, I.L. Dalziel, I.W.D. Grunow, A.M. New look at the geology of Thurston Island. in: Geological evolution of Antarctica; proceedings of the Fifth International Symposium on Antarctic Earth Sciences, Cambridge, 1987.Thomson M.R.A. Crame J.A. Thomson J.W. (eds) Cambridge: Cambridge University Press. 1991. pp.399-403 Storey, B.C. Leat, P.T. Weaver, S.D. Pankhurst, R.J. Bradshaw, J.D. Kelley, S. Mantle plumes and Antarctica-New Zealand rifting: evidence from mid-Cretaceous mafic dykes. Journal of the Geological Society of London 156: 659-671, 1999. Weaver, S.D. Storey, B.C. Pankhurst, R.J. Mukasa, S.B. Di Venere, V.J. Bradshaw, J.D. Antarctica-New Zealand rifting and Marie Byrd Land lithospheric magmatism linked to ridge subduction and mantle plume activity. Geology 22(9): 811-814, 1994. Weaver, S.D. Bradshaw, J.D. Pankhurst, R.J. Muir, R.J. Storey, B.C. Waight, T.E. Ireland, T.R. Cretaceous magmatism, make-up and break-up of the SW Pacific Gondwana margin. in: Mesozoic 96/Mesozoic Geology of the Eastern Australia Plate Conference, 23-26 September 1996, Sheraton Brisbane Hotel & Tower, Queensland, Australia. Brisbane: Geological Society of Australia. 1996. pp.548-556 Weaver, S.D. Bradshaw, J.D. Muir, R.J. Mesozoic magmatic and tectonic events in New Zealand Gondwanic terranes. in: Terrane-dynamics - 97, 7th International Conference on Terrane Geology, Christchurch, N.Z.Bradshaw J.D. Weaver S.D. (eds) Christchurch: University of Canterbury. 1997. pp.161-164 Mukasa, S.B. and Dalziel, I.W.D., 2000. Marie Byrd Land, West Antarctica: Evolution of Gondwana's Pacific margin constrained by zircon U-Pb geochronology and feldspar common-Pb isotopic compositions. Geological Society of America Bulletin, 112: 611-627. Gondwana's Pacific margin constrained by zircon U-Pb geochronology and feldspar common-Pb isotopic compositions. Geological Society of America Bulletin, 112: 611-627. Bradshaw, J.D. Begg, J.C. Buggisch, W. Brodie, C. Tessensohn, F. Wright, T.O. New data of Paleozoic stratigraphy and structure in north Victoria Land.New Zealand Antarctic record 6(3): 1-6, 1985. Bradshaw, J.D. Weaver, S.D. Laird, M.G. Suspect terranes and Cambrian tectonics in northern Victoria Land, Antarctica.in: Tectonostratigraphic terranes of the circum-Pacific region.Howell D.G. (ed) Tulsa, OK: Circum-Pacific Council for Energy and Mineral Resources. 1985. pp.467-479 Bradshaw, J.D. Terrane displacement and terrane boundaries in northern Victoria Land.in: Papers of the 3rd Circum-Pacific Terrane Conference, 1984, Australia.Leith E.C. (ed) Sydney: Geological Society of Australia. 1985. pp.30-33 [Miscellaneous publication: 14] Bradshaw, J.D. Terrane boundaries and terrane displacement in northern Victoria Land, Antarctica: some problems and constraints. in: Terrane accretion and orogenic belts.Leitch E.C. Schreiber E. (eds) Washington: American Geophysical Union. 1987. pp.199-205[ Geodynamic series: 19] Bradshaw, J.D. Terrane boundaries in north Victoria Land.in: Proceedings of the Meeting on Geosciences in Victoria Land, Antarctica, Sienna, 1987. Sienna: Societa Geologica Italiana. 1987. pp.9-15 Memorie della Societa Geologica Italiana: 33] Bradshaw, J.D. Cretaceous dispersion of Gondwana: continental and oceanic spreading in the south-west Pacific-Antarctic sector. in: Geological evolution of Antarctica; proceedings of the Fifth International Symposium on Antarctic Earth Sciences, Cambridge, 1987.Thomson M.R.A. Crame J.A. Thomson J.W. (eds) Cambridge: Cambridge University Press. 1991. pp.581-585 Bradshaw, J.D. 2007. The Ross Orogen and the Lachlan Fold Belt in Marie Byrd Land, Northern Victoria Land and New Zealand: Implications for the tectonic setting of the Lachlan Fold Belt in Antarctica. USGS OF-2007-1047, short research paper 059, 2007. Kleinschmidt, G. & Tessensohn, F. 1987. Early Palaeozoic westward directed subduction at the Pacific Margin of Antarctica. In: McKenzie, G. D., ed. Gondwana Six: Structure, Tectonics, and Geophysics. pp. 89-105. Geophysical Monograph 40, American Geophysical Union., Wright, T. O. and C. Brodie (1987), The Handler Formation, a new unit of the Robertson Bay Group, northern Victoria Land, Antarctica, in Gondwana Six: Structure, tectonics and Geophysics, edited by McKenzie, G.D. pp. 25-29. Monograph 40, American Geophys. Union, Washington. Wright, T. O., R. J. Ross, and J. E. Repetski (1984), Newly discovered youngest Cambrian or oldest Ordovician fossils from the Roberson Bay terrane (formerly Precambrian), northern Victorian land, Antarctica, Geology, 12, 301-305. Tessensohn, F., Henjes-Kunst, F., 2005. Northern Victoria Land, Antarctica: far-travelled or local products. In: A.P.M. Vaughan, Leat, P.T., Pankhurst, R. J., (Editor), Terrane Processes on the margins of Gondwana. Geological Society of London Special Publication 246. Geological Society of London, London, pp. 275-291.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 19901120
Ending_Date: 19910116
Currentness_Reference:Unknown
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 19920212
Ending_Date: 19920313
Currentness_Reference:Unknown
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 19921126
Ending_Date: 19921230
Currentness_Reference:Unknown
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Description_of_Geographic_Extent:
Bounding_Coordinates:
West_Bounding_Coordinate: -100.0
East_Bounding_Coordinate: -148.0
North_Bounding_Coordinate: -70.0
South_Bounding_Coordinate: -77.15
Keywords:
Theme:
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Theme_Keyword_Thesaurus: GCMD PLATFORM
Theme_Keyword_Thesaurus: GCMD INSTRUMENT
Theme_Keyword_Thesaurus: ISO TOPIC CATEGORY
Theme_Keyword_Thesaurus: DATA SET LANGUAGE
Theme_Keyword: EARTH SCIENCE > SOLID EARTH > GEOMORPHIC LANDFORMS/PROCESSES > TECTONIC LANDFORMS
Theme_Keyword: EARTH SCIENCE > SOLID EARTH > ROCKS/MINERALS/CRYSTALS > BEDROCK LITHOLOGY
Theme_Keyword: EARTH SCIENCE > SOLID EARTH > ROCKS/MINERALS/CRYSTALS > METAMORPHIC ROCKS
Theme_Keyword: EARTH SCIENCE > SOLID EARTH > TECTONICS > PLATE TECTONICS > STRATIGRAPHIC SEQUENCE
Theme_Keyword: GROUND-BASED OBSERVATIONS
Theme_Keyword: VISUAL OBSERVATIONS
Theme_Keyword: GEOSCIENTIFIC INFORMATION
Theme_Keyword: ENGLISH
Place:
Place_Keyword_Thesaurus: GCMD
Place_Keyword: CONTINENT > ANTARCTICA > MARIE BYRD LAND
Place_Keyword: CONTINENT > ANTARCTICA > HOBB COAST
Place_Keyword: CONTINENT > ANTARCTICA > RUPERT COAST
Place_Keyword: CONTINENT > ANTARCTICA
Place_Keyword: GEOGRAPHIC REGION > POLAR
Access_Constraints: Not Available
Use_Constraints:
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Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: JOHN BRADSHAW
Contact_Position: INVESTIGATOR
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Department of Geological Sciences
Address: University of Canterbury
Address: Private Bag 4800
City: Christchurch
Postal_Code: 8140
Country: New Zealand
Contact_Voice_Telephone: +64 3 364 2987 ext 7779
Contact_Facsimile_Telephone: +64 3 364 2769
Contact_Electronic_Mail_Address: john.bradshaw@canterbury.ac.nz
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Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
The British Antarctic Survey holds a collection of the samples including almost all of Bob Pankhurst and Bryan Storey (investigators with BAS on this expedition) samples and a small selection of samples collected by other workers on the SPRITE project. Nearly all of the samples have been sectioned and BAS holds geochronology data. For more information, please contact: Alex Tate Geological Data Manager British Antarctic Survey High Cross, Madingley Road, Cambridge, CB3 0ET, UK Phone: +44 (0) 1223 221439 Two of the investigators were from the University of Canterbury in New Zealand. All remaining samples and thin sections of all the analysed rocks are kept in the University of Canterbury geological rock collection. A volume of 500 or so chemical analyses of rocks from Marie Byrd Land is held by the investigator. For more information, please contact the investigator or the department.
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Completeness_Report:
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Process_Date: Unknown
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Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: NZ/NZAI/ANZ > Antarctica New Zealand, New Zealand Antarctic Institute, New Zealand
Contact_Person: SHULAMIT GORDON
Contact_Position: DATA CENTER CONTACT
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Antarctica New Zealand
Address: Private Bag 4745
City: Christchurch
Country: New Zealand
Contact_Voice_Telephone: +64 3 358 0200
Contact_Facsimile_Telephone: +64 3 358 0211
Contact_Electronic_Mail_Address: s.gordon@antarcticanz.govt.nz
Resource_Description: K051_1990_1993_NZ_1
Distribution_Liability:
Not Available
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: Not Available
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
http://www.antarcticanz.govt.nz/
Access_Instructions:
DATA CENTER URL
Digital_Transfer_Option:
Fees: Not Available
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Metadata_Reference_Information:
Metadata_Date: 20050922
Metadata_Review_Date: 20090606
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: SHULAMIT GORDON
Contact_Position: DIF AUTHOR
Contact_Address:
Address_Type: Mailing and Physical Address
Address: Antarctica New Zealand
Address: Private Bag 4745
City: Christchurch
Country: New Zealand
Contact_Voice_Telephone: +64 3 358 0200
Contact_Facsimile_Telephone: +64 3 358 0211
Contact_Electronic_Mail_Address: s.gordon@antarcticanz.govt.nz
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
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