Interregional correlations for the Ross Orogen in the Ross Sea/Ross Ice Shelf sector of the Transantarctic Mountains: implications for the tectonic evolution of the palaeo-Pacific Antarctic margin of Gondwana (INTERTAM)
Entry ID:
ftalarico_intertam
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Summary
Rocks of the Ross Orogen of the Transantarctic Mountains (TAM) are generally interpreted to have evolved during a Neoproterozoic-early Paleozoic cycle of deposition and thermotectonic phases, spanning the breakup of Rodinia and the final consolidation of Gondwana. The main geological framework of the Ross Orogen may be subdivided along the c. 2000 km length of the TAM facing the Ross Sea / ... Ross Ice Shelf into three major segments, including Northern Victoria Land (NVL, from David Glacier to the Pacific end of the chain), southern Victoria Land (SVL, between Byrd and David Glaciers) and the central Transantarctic Mountains (CTAM, from Byrd Glacier to the Queen Maud Mountains). Voluminous granitoids (Granite Harbour Intrusive Complex - GHI) intruded as batholiths at c. 530-480 Ma, represent a unifying feature throughout the length of the TAM. But although the general tectonic history of the Ross Orogen is fairly well known within each of the major segments of the TAM, significant variations in lithostratigraphic, structural, and metamorphic patterns, as well as in granitoid geochemical affinity, are evident between the different segments. Until our knowledge of the relationships of the tectono-metamorphic histories and of the detailed chronology of the magmatic episodes between the segments is understood, a comprehensive tectonic model of the development of the Ross Orogen remains to be formulated. The areas targeted by this research were selected to allow a comparison of the tectono-metamorphic and igneous evolution within each of the three segments of the Ross orogenic belt in the Ross Sea/Ross Ice Shelf region. The correlation of litostratigraphic and structural development, as well as the main magmatic and metamophic episodes thoughout the wide area between the CTAM and NVL should give a deeper insight into critical aspects of the tectonic development of a significant portion of the Gondwana palaeo-Pacific margin. The field work on selected areas include collection of petrographic data at the macro scale and samples (stored in the Museo Nazionale dellÂ’Antartide at Siena). Petrographic and mineral chemistry investigations as well as geochemical data for major and trace elements and isotopes have been carried out on selected rock units of the different areas. The main target of this research is the comparison of the tectono-metamorphic and magmatic evolution recorded in the pre-Devonian basement of the Ross orogenic belt in three seqments of the TAM. By these comparisons a correlation of units and orogenic phases between the NVL, SVL and CTAM segments of the orogen will be proposed. These final results will be achieved through a series of intermediate objectives, as follows: 1) description of lithotectonic features of metasedimentary rock assemblages, reconstruction of pre-metamorphic lithostratigraphic settings and of the structural development in each area, and relationships with the emplacement of local GHI units; 2) recognition of intrusive units and suites, reconstruction of the emplacement sequence and petrogenesis modelling; 3) acquisition of age data on both GHI and metamorphic rocks (Ar/Ar, U/Pb and Sm/Nd systematics) to constrain the temporal development of magmatic and tectono-metamorphic processes recorded in the metamorphic and GHI units; 4) reconstruction of P-T-D-t trajectories in the metamorphic units/complexes, and of temporal and structural relationships between the main metamorphic stages and the formation/emplacement of GHI in the three regions; 5) definition of regional correlations, and formulation of a tectonic model for the Ross orogen in the Ross Sea/Ross Ice Shelf sector of the TAM.The planned investigations are carried out through a multi-disciplinary approach, based on the integration and comparison among results obtained from coordinated structural, petrological and geochemical (major, trace, isotopic) studies in all targeted areas. The following will be accomplished: 1) evaluation of available data, rock collections, literature data, and field reports in order to select key-areas to be visited for their potential to explore the SVL/NVL boundary zone; compilation of data on 1:250000 thematic maps 2) field mapping to produce a 1:250000 map for each of the working regions and 1:50000 maps for local, selected areas; 3) reduction of structural data and selection of structurally significant samples for petrological studies finalized to the acquisition of microtextural and microchemical data through analytical SEM/EDS and WDS microscopy; 4) macrochemical analyses through XRF and AAS on selected samples from mapped GHI igneous rock units and metasedimentary rocks; 5) thermobarometric estimates based on both intra- and inter-crystalline cation exchange and on classic petrogenetic grids as defined by experimental data. These estimates will be compared with the thermometric isotopic ones based on anion exchange (O16/O18); 6) geochronological investigations for determination of the thermal history recorded in the metamorphic units (Sm/Nd, U/Pb, Ar/Ar), the timing of intrusive phases (U/Pb, Sm/Nd) and of the provenance age of detrital zircons (U/Pb) in metasedimentary units toward constraining the younger bound of their depositional ages; 7) modelling of reactions and microstructural-mineralogical evolution of rocks, reconstruction of the P-T-D-t paths and modelling of the thermal and geodynamic conditions during tectonic evolution.
Geographic Coverage
Spatial coordinates
| N: -70.0 |
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S: -80.0 |
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E: 167.0 |
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W: 145.0 |
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Min Altitude: 0
Max Altitude: 3500
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Temporal Coverage
Start Date:
2000-01-01
Stop Date:
2005-10-28
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Location Keywords
Science Keywords
ISO Topic Category
Instrument
Ancillary Keywords
Data Set Progress
Data Center
Distribution
Distribution Media:
Scientific publications
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Personnel
CLAUDIO
GHEZZO
Role:
INVESTIGATOR
Phone:
+39 577233928
Fax:
+39 577233938
Email:
Ghezzo at unisi.it
Contact Address:
via Laterina 8
City:
Siena
Postal Code:
53100
Country:
Italy
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Related URL
Publications/References
F. TALARICO, R. FINDLAY, N. RASTELLI - 'Metamorphic evolution of the Koettlitz Group in the Koettlitz-Ferrar Glaciers region (southern Voctoria Land, Antarctica)' (pubblicazione su rivista, 2005) Terra Antartica; in corso di stampa (lettera di accettazione del 03-02-2005) ? STUMP, B. GOOTEE, F. TALARICO - 'Tectonic model for development of the Byrd Glacier discontinuity and ... surrounding regions of the Transantarctic Mountains during the Neoproterozoic-early Paleozoic' (pubblicazione su volume collettaneo, 2005) Volume: Antartic Contributions to Global Earth Science, 9th ISAES, Casa Editrice: AWI, Potsdam, Germania; in corso di stampa (lettera di accettazione del 02-02-2005)? STUMP, B. GOOTEE, F. TALARICO, . W. VAN SCHMUS, P. BRAND, . K. FOLAND, M. FANNING - 'Correlation of Byrd and Selborne Groups, with implications for the Byrd Glacier discontinuity, central Transantarctic Mountains, Antarctica' (pubblicazione su rivista, 2004) NEW ZEALAND JOURNAL OF GEOLOGY AND GEOPHYSICS, Vol.47, 157 ? 171? U. SCH?SSLER, F. HENJES-KUNST, F. TALARICO, T. FL?TTMANN - 'High-grade crystalline basement of the northwestern Wilson Terrane at Oates Coast: new petrological and geochronological data and implications for its tectonometamorphic evolution' (pubblicazione su rivista, 2004) Terra Antartica, Vol.11, 15 ? 34? F. TALARICO, R. PALMERI, C. A. RICCI - 'Regional metamorphism and P-T evolution of the Ross Orogen in Northern Victoria Land (Antarctica): a review.' (pubblicazione su rivista, 2004) Periodico di mineralogia , Vol.73, 185 ? 196? KLEINSCHMIDT, A. LAUFER, F. TALARICO - 'Antarktis und Australien, die (fast) Unzertrennlichen - ein Uberblick' (pubblicazione su rivista, 2003) Berichte zur Polarforschung, Vol.71, 97 ? 108? TALARICO, E. ARMADILLO, F. FERRACCIOLI, N. RASTELLI - 'Magnetic petrology of the Ross Orogen in Oates Land (Antarctica)' (pubblicazione su rivista, 2003) Terra Antartica, Vol.10, 197 ? 220? KLEINSCHMIDT, F. TALARICO - 'Structural and metamorphic evolution of the Mertz Shear Zone (East Antarctic Craton, George V Land): implications for Australia/Antarctica correlations and East Antarctic Craton/Ross orogen relationships' (pubblicazione su rivista, 2003) Terra Antartica, Vol.10, 229 ? 248? F. FERRACCIOLI, D. DAMASKE, E. BOZZO, F. TALARICO - 'The Matusevich aeromagnetic anomaly over Oates Land, East Antarctica' (pubblicazione su rivista, 2003) Terra Antartica, Vol.10, 221 ? 228? F. TALARICO, G. KLEINSCHMIDT - 'The Mertz Shear Zone (George V Land): implications for australia/Antarctica correlations and East Antarctic Craton/Ross orogen relationships' (pubblicazione su rivista, 2003) Terra Antartica Reports, Vol.9, 149 ? 153? R. PALMERI, B. GHIRIBELLI, F. TALARICO, C. A. RICCI - 'Ultra high pressure metamorphism in felsic rocks: the garnet ? phengite gneisses and quartzites from Lanterman Range (Antarctica).' (pubblicazione su rivista, 2003) EUROPEAN JOURNAL OF MINERALOGY, Vol.15, 513 ? 525? F. TALARICO, E. ARMADILLO, E. BOZZO - 'Antarctic rock magnetic properties: new susceptibility measurements in Oates land and George V Land in the BACKTAM Project' (pubblicazione su rivista, 2001) Terra Antartica Reports, Vol.5, 45 ? 50? N. ROLAND, F. HENJES-KUNST, G. KLEINSCHMIDT, F. TALARICO - 'Petrographical, geochemical and radiometric investigations in Northern Victoria Land, Oates Land and George V LAnd: towards a better understanding of plate boundary processes in Antarctica' (pubblicazione su rivista, 2001) Terra Antartica Reports, Vol.5, 57 ? 66? G. KLEINSCHMIDT, F. TALARICO - 'The Mertz Shear Zone' (pubblicazione su rivista, 2001) Terra Antartica Reports, Vol.5, 109 - 115? F. TALARICO, G. DI VINCENZO, G. KLEINSCHMIDT - 'A Major Crustal Discontinuity in George V Land: New Petrological and 40Ar-39Ar Data and New Research Opportunities' (abstract di convegno, 2004) , 23 - 23, workshop Frontiers and Opportunities in Antarctic Earth Sciences, Siena (italia) dal 29/8/2004 al 31/8/2004? F. FERRACCIOLI, D. DAMASKE, E. BOZZO, F. TALARICO - 'Aeromagnetic evidence of accreted (?) arc crust in the Western Wilson Terrane' (abstract di convegno, 2003) , 87 - 87, 9th international Symposium on Antarctic Earth Sciences, Potsdam (Germany) dal 8/9/2003 al 12/9/2003? STUMP , B. GOOTEE, F. TALARICO - 'Geological investigation of the Byrd Glacier discontinuity: progrss report and working hypothesis' (abstract di convegno, 2003) , 311 - 312, 9th international Symposium on Antarctic Earth Sciences, Potsdam (Germany) dal 8/9/2003 al 12/9/2003? TALARICO, E. ARMADILLO, F. FERRACCIOLI, N. RASTELLI - 'Magnetic petrology of the ross Orogen in Oates Land, East Antarctica' (abstract di convegno, 2003) , 314 - 315, 9th international Symposium on Antarctic Earth Sciences, Potsdam (Germany) dal 8/9/2003 al 12/9/2003? TALARICO, R. PALMERI, E. STUMP , B. GOOTEE, C. A. RICCI - 'Metamorphic evolution of the Selborne Group, and implications for the Byrd Glacier discontinuity, central Transantarctic Mountains, Antarctica' (abstract di convegno, 2003) , 313 - 314, 9th international Symposium on Antarctic Earth Sciences, Potsdam (Germany) dal 8/9/2003 al 12/9/2003? F. TALARICO, G. KLEINSCHMIDT, G. DI VINCENZO - 'The Mertz Shear Zone, George V Land: implications for Australia-Antarctica correlations and East Antarctic Craton-Ross Orogen relationships' (abstract di convegno, 2003) , 315 - 316, 9th international Symposium on Antarctic Earth Sciences, Potsdam (Germany) dal 8/9/2003 al 12/9/2003? R. PALMERI, F. TALARICO, C. A. RICCI - 'Ultra-high-pressure metamorphism at the palaeo-Pacific margin of Gondwana: the Lanterman Range in Antarctica' (abstract di convegno, 2003) , 249 - 250, 9th international Symposium on Antarctic Earth Sciences, Potsdam (Germany) dal 8/9/2003 al 12/9/2003? B. CALONACI, G. DI VINCENZO, C. A. RICCI, F. TALARICO - 'An 40Ar-39Ar investigation of micas from the Eisenhower Range (Northern Victoria Land, Antarctica): implications for the depositions of the Priestley Formation and the tectono-metamorphic evolution during the Ross Orogeny' (abstract di convegno, 2002) , 51 - 52, workshop Scienze della Terra in Antartide, Siena (Italia) dal 30/9/2002 al 2/10/2002? F. TALARICO, R. PALMERI, B. GOOTEE, E. STUMP, C. A. RICCI - 'Contrasting tectono-metamorphic evolution in the Ross orogenic belt across the ByrdGlacier discontinuity.' (abstract di convegno, 2002) , 56 - 56, Gondwana 11 Correlations and connections, Christchurch (Nuova Zelanda) dal 25/8/2002 al 30/8/2002? P. BRAND, T. DEWANE, . K. FOLAND, B. GOOTEE, E. STUMP, F. TALARICO, . W. VAN SCHMUS - 'Geochronology of deformation, intrusion, and cooling during the ross Orogeny, Byrd Glacier area, Antarctica' (atto di convegno, 2002) , 224 - 224, Geological Society of America, Denver (USA) dal 7/10/2002 al 11/10/2002? F. TALARICO, R. PALMERI, B. GOOTEE, E. STUMP - 'Geology and petrology of the Ross orogenic belt across the Byrd Glacier discontinuity: ongoing and planned investigations' (abstract di convegno, 2002) , 141 - 142, workshop Scienze della Terra in Antartide, Siena (Italia) dal 30/9/2002 al 2/10/2002? S. SANDRONI, F. TALARICO - 'Migmatitic granulites from the Transantarctic Mountains and central Dronning Maud Land: new constrains on the petrological evolution of the East Antarctic Shield' (abstract di convegno, 2002) , 236 - 236, Geoscience 2002: 16th Australian Geological Convention, Adelaide (Australia) dal 1/7/2002 al 5/7/2002? F. TALARICO, G. KLEINSCHMIDT - 'Structural and metamorphic evolution of the Mertz Shear Zone (East Antarctic Craton, George V Land): implications on Australia/Antarctica correlations and East Antarctic Craton/Ross orogen relationships' (abstract di convegno, 2002) , 139 - 140, workshop Scienze della Terra in Antartide, Siena (Italia) dal 30/9/2002 al 2/10/2002? G. KLEINSCHMIDT, F. TALARICO - 'The Mertz Shear Zone: new evidence of the &Mawson continent& from the East Antarctic Shield in George V Land' (abstract di convegno, 2002) , 237 - 237, Geoscience 2002: 16th Australian Geological Convention, Adelaide (Australia) dal 1/7/2002 al 5/7/2002? R. PALMERI, B. GHIRIBELLI, F. TALARICO, C. A. RICCI - 'Very-high pressure metamorphism in felsic rocks: the garnet-phengite gneisses and quartzites from the Lanterman Range (Antarctica). ' (abstract di convegno, 2002) , 103 - 104, workshop Scienze della Terra in Antartide, Siena (Italia) dal 30/9/2002 al 2/10/2002? F. TALARICO, E. STUMP, P. BRAND, R. CAROSI, - 'Progetto 4.2: INTERTAM ?Correlazioni inter-regionali nell'orogene di Ross nel settore Ross Sea/ Ross Ice Shelf delle Montagne Transantartiche: implicazioni sull'evoluzione tettonica del margine paleo-Pacifico antartico del Gondwana? ' (pubblicazione su volume collettaneo, 2004) Volume: PNRA- Rapporto sulla campagna 2003/04, Casa Editrice: Progetto Antartide -ENEA, Roma, Italia
Creation and Review Dates
DIF Creation Date:
2008-04-18
Last DIF Revision Date:
2008-06-12
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