DATA REPOSITORY. G. Di Vincenzo, A. Grande, F. Rossetti CONTENTS

Transcription

1 DATA REPOSITORY Paleozoic siliciclastic rocks from northern Victoria Land (Antarctica): provenance, timing of deformation and implications for the Antarctica/Australia connection G. Di Vincenzo, A. Grande, F. Rossetti CONTENTS APPENDIX Experimental Methods TABLES Table DR1. Geochemical and isotope whole-rock data Table DR2. Electron microprobe analyses of detrital white micas Table DR3. White mica single-grain total fusion 40 Ar 39 Ar data Table DR4. In-situ 40 Ar 39 Ar data on rock chips Table DR5. Step-heating 40 Ar 39 Ar data on whole-rock samples FIGURES Figure DR1. Chemical composition of metsediments from the Bowers and the Robertson Bay Terranes, plotted in the classification scheme of sandstones based on major elements (Herron, 1988) (A) and in the discrimination diagrams for tectonic setting based on Phanerozic graywackes (Bathia and Crook, 1986) (B and C). Figure DR2. Th/Yb vs. Ta/Yb plot (after Pearce, 1983) for Cambrian mafic (meta)volcanic rocks of the Lachlan orogen and for mafic igneous rocks with variable metamorphic overprint from the Bowers Terrane and the eastern Wilson Terrane. Source of data: Stawell Zone (Eastern Lachlan orogeny), Squire et al. (2006); Heathcote and Mount Wellington Belts (Western and Central Lachlan orogen), Foster et al. (2009); Bowers Terrane, Rocchi et al. (2011); Wilson Terrane, Di Vincenzo et al. (1997) and Palmeri et al. (2012). REFERENCES CITED

2 Experimental Methods Major and trace elements, including Sm and Nd concentrations, were determined by ICP-AES and ICP-MS at the Actlabs (Ontario, Canada) on whole-rock powders dissolved through the lithium metaborate and lithium tetraborate fusion method. Nd isotopic compositions were determined by Thermal Ionization Mass Spectrometry at the IGG CNR of Pisa (Italy), using a Finngan MAT 262 multicollector mass-spectrometer running in dynamic mode. Measured 143 Nd/ 144 Nd were normalized to 146 Nd/ 144 Nd = ε Nd notation was calculated using a 147 Sm/ 144 Nd ratio of and a 143 Nd/ 144 Nd ratio of as starting values in the chondritic mantle reference. The Nd model ages relative to a quadratic depleted mantle evolution (T DM ) were calculated following DePaolo et al. (1991). During the collection of the isotopic data, four analyses of the JNdi-1 standard (Tanaka et al., 2000) yielded an average value of ± (±2SD). Data are listed in Table DR1. Petrographical and microstructural investigation were carried out on polished thin sections using optical microscopy and back-scattered electron (BSE) imaging. BSE images were acquired at the Dipartimento di Scienze della Terra of Siena (Italy) using a Philips XL30 scanning electron microscope (SEM), operating at an accelerating voltage of 20 kv. Electron microprobe (EMP) analyses of detrital white micas were performed at the Dipartimento di Scienze della Terra of Milano (Italy), by a JEOL 8200 Super Probe, operating at an accelerating voltage of 15 kv, sample current of 5 na and using a beam of 5 µm. Natural standards were used for calibration. The full set of data is available as supplementary material (Table DR2). Sample preparation and 40 Ar 39 Ar analyses were also completed at IGG CNR, using different laser extraction techniques, namely: (1) single-grain total fusion analysis of detrital white micas (20 to 35 flakes; grain size of µm), separated through standard separation techniques and careful handpicking under a stereomicroscope; (2) insitu analysis on rock chips ~9.0 mm in diameter, drilled from double-polished thick sections (~300 µm thick), previously investigated by BSE imaging; (3) step-heating analysis of a few (4 6) whole-rock grains, handpicked under a stereomicroscope from the µm grain size and investigated by SEM prior to 40 Ar 39 Ar analysis. White mica concentrates, rock chips and whole-rock grains were cleaned ultrasonically by alternating methanol and deionized water. Samples were wrapped in aluminium foil and irradiated for 80 h in the core of the TRIGA reactor at the University of Pavia (Italy) along with the dating standard Fish Canyon sanidine (FCs). Single-grain total fusion analyses were completed on individual detrital white mica using a continuous-wave (CW) diode-pumped Nd:YAG (neodymium-doped yttrium aluminium garnet) infrared laser. In situ laser 40 Ar 39 Ar analyses were carried out by either the Nd:YAG infrared laser connected to an external computer-controlled shutter or a pulsed Nd:YAG ultraviolet laser (frequency quadrupled and Q-switched). Single infrared laser shots (lasting 10 ms) of the infrared laser (operating at 12 W) were focused to produce melt pits ~100 µm in diameter. The ultraviolet laser, operating at 20 Hz and 1 mj per pulse, was focused to ~10 µm and repeatedly rastered by a computer-controlled x y stage over areas of ~(100 x 100) µm 2 to produce pits a few tens of micrometers deep. Laser step-heating experiments were performed using the infrared laser beam defocused to a ~2 mm spot size and homogenized by a beam-homogenizer lens which produces a flat power distribution. Steps were carried out at increasing laser power until complete melting occurred. More details on the analytical procedures are also given in Di Vincenzo and Skála (2009). Data corrected for post-irradiation decay, mass discrimination effects, isotope derived from interfering neutron reactions and blank are listed in Tables DR3, DR4 and DR5. Errors on single runs are 2σ analytical uncertainties, including in-run statistics and uncertainties in the discrimination factor, interference corrections and procedural blanks. Uncertainties on total gas ages, on error-weighted mean ages and on single run when used for intersample comparison, also include the

3 uncertainty in the fluence monitor (2σ internal errors). Ages were calculated using the IUGS recommended constants (Steiger and Jäger, 1977) and an age of Ma for FCs (Jourdan and Renne, 2007).

4 TABLE DR1. WHOLE-ROCK GEOCHEMICAL AND ISOTOPIC (ND) ANALYSES sample GO RG GO GO M CR CR CR CR GM CR3 [2] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] major elements (wt%) SiO TiO Al 2 O Fe 2 O 3 (T) MnO MgO CaO Na 2 O K 2 O P 2 O LOI Total trace elements (ppm) and isotopic data Be Sc V Cr Co Ni Cu Zn Ga Rb Sr Y Zr Nb Sb Cs Ba La Ce Pr Nd Sm Eu Gd Tb Dy Ho Er Tm Yb Lu Hf Ta W Tl Pb Th U Sm/ 144 Nd Nd/ 144 Nd ±2σ m ε Nd(0) T DM

5 Table DR 2. Electron microprobe analyses of detrital white micas. Structural formulae were calculated on the basis of 11 oxigens. Wilson Terrane [1] Sample PR a 3b 4a 4b a 10b 11a 11b a 15b core core core rim core rim core core core core core core rim core rim core core core core rim SiO TiO Al 2 O FeO MnO bdl bdl bdl 0.04 bdl bdl bdl bdl bdl 0.03 bdl bdl bdl MgO CaO bdl Na 2 O K 2 O Cr 2 O bdl bdl 0.15 bdl 0.03 bdl NiO bdl bdl bdl bdl bdl 0.03 bdl bdl 0.05 bdl bdl bdl bdl bdl bdl Cl bdl bdl bdl bdl 0.01 F nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd Total Si Ti Al Fe Mn bdl bdl bdl bdl bdl bdl bdl bdl bdl bdl bdl Mg Ca bdl Na K Cr bdl bdl bdl bdl Ni bdl bdl bdl bdl bdl bdl bdl bdl bdl bdl bdl bdl bdl Cl bdl bdl bdl bdl bdl F nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd Total Na+K+Ca Na/(Na+K)

6 Wilson Terrane Table DR 2. Continued Bowers Terrane [1] Sample PR51 [2] Sample GO core core core core core core core core core core core rim core rim core core core core core SiO TiO Al 2 O FeO MnO bdl bdl bdl bdl MgO CaO Na 2 O K 2 O Cr 2 O bdl 0.01 bdl 0.04 bdl bdl 0.05 bdl bdl NiO bdl 0.03 bdl bdl bdl bdl bdl 0.03 Cl bdl 0.00 bdl F nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd Total Si Ti Al Fe Mn bdl bdl bdl bdl Mg Ca Na K Cr bdl bdl bdl bdl bdl bdl Ni bdl bdl bdl bdl bdl Cl bdl bdl F nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd Total Na+K+Ca Na/(Na+K)

7 Table DR 2. Continued Bowers Terrane [2] Sample GO7 [3] Sample DS a 4b 5a 5b 6a 6b 7a 7b 8a 8b 9a core core core core core core core core core rim core rim core rim core rim core rim core SiO TiO Al 2 O FeO MnO bdl bdl bdl bdl bdl 0.03 MgO CaO bdl 0.01 bdl bdl bdl Na 2 O K 2 O Cr 2 O bdl bdl 0.01 bdl 0.02 bdl bdl bdl bdl 0.05 bdl NiO bdl bdl bdl bdl bdl bdl bdl bdl bdl bdl 0.05 bdl 0.03 Cl bdl bdl F nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd Total Si Ti Al Fe Mn bdl bdl bdl bdl bdl Mg Ca bdl bdl bdl bdl Na K Cr bdl bdl bdl bdl bdl bdl bdl Ni bdl bdl bdl bdl bdl bdl bdl bdl bdl bdl bdl Cl bdl F nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd Total Na+K+Ca Na/(Na+K)

8 Table DR 2. Continued Bowers Terrane [3] Sample DS7 [4] Sample RG4 9b a 13b 14a 14b a 1b rim core core core core rim rim core core core core core core core rim core core core core SiO TiO Al 2 O FeO MnO 0.03 bdl bdl bdl MgO CaO bdl Na 2 O K 2 O Cr 2 O bdl bdl 0.03 bdl 0.04 bdl bdl bdl NiO bdl bdl bdl 0.02 bdl bdl bdl 0.01 bdl bdl bdl bdl 0.05 bdl bdl 0.00 Cl bdl bdl 0.01 bdl 0.01 F nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd Total Si Ti Al Fe Mn bdl bdl bdl Mg Ca bdl Na K Cr bdl bdl bdl bdl bdl bdl Ni bdl bdl bdl bdl bdl bdl bdl bdl bdl bdl bdl bdl Cl bdl bdl bdl F nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd Total Na+K+Ca Na/(Na+K)

9 Table DR 2. Continued Bowers Terrane [4] Sample RG a 10b 11 12a 12b a 18b 19a 19b 20 core core core core rim core core rim core core core core core core rim core rim core SiO TiO Al 2 O FeO MnO bdl bdl bdl bdl MgO CaO 0.01 bdl bdl bdl 0.01 bdl bdl bdl 0.02 Na 2 O K 2 O Cr 2 O bdl bdl bdl bdl bdl bdl 0.04 bdl NiO bdl bdl bdl bdl 0.02 bdl 0.01 bdl bdl 0.04 bdl 0.07 bdl 0.03 Cl bdl bdl bdl bdl 0.01 F nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd Total Si Ti Al Fe Mn bdl bdl Mg Ca bdl bdl bdl bdl bdl bdl Na K Cr bdl bdl bdl bdl bdl bdl bdl Ni bdl bdl bdl bdl bdl bdl bdl bdl bdl Cl bdl bdl bdl bdl F nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd Total Na+K+Ca Na/(Na+K)

10 Table DR 1. Continued Robertson Bay Terrane [6] Sample GO core core core core core core core core core core core core core core core core core core core core SiO TiO Al 2 O FeO MnO bdl bdl bdl 0.03 bdl bdl bdl bdl 0.00 MgO CaO bdl bdl bdl bdl bdl Na 2 O K 2 O Cr 2 O bdl bdl bdl bdl 0.06 bdl NiO bdl bdl bdl bdl bdl bdl 0.04 bdl 0.01 bdl bdl bdl Cl bdl bdl bdl bdl F nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd Total Si Ti Al Fe Mn bdl bdl bdl bdl bdl bdl bdl bdl Mg Ca bdl bdl bdl bdl bdl bdl Na K Cr bdl bdl bdl bdl bdl bdl bdl Ni bdl bdl bdl bdl bdl bdl bdl bdl bdl bdl Cl bdl bdl bdl bdl F nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd Total Na+K+Ca Na/(Na+K)

11 Table DR 1. Continued Robertson Bay Terrane [6] Sample GO9 [9] Sample CR core core core core core core core core core core core core core core core core core core core SiO TiO Al 2 O FeO MnO bdl bdl bdl MgO CaO bdl bdl bdl bdl bdl Na 2 O K 2 O Cr 2 O bdl bdl bdl bdl bdl 0.10 NiO bdl bdl bdl bdl bdl bdl bdl bdl 0.00 Cl bdl bdl bdl F nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd Total Si Ti Al Fe Mn bdl bdl bdl bdl bdl Mg Ca bdl bdl bdl bdl bdl Na K Cr bdl bdl bdl bdl bdl Ni bdl bdl bdl bdl bdl bdl bdl bdl bdl Cl bdl bdl bdl F nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd Total Na+K+Ca Na/(Na+K)

12 Table DR 1. Continued Robertson Bay Terrane [9] Sample CR6 [10] Sample CR a 3b core core core core core core rim core core rim core core core core core core core core core SiO TiO Al 2 O FeO MnO 0.01 bdl bdl bdl bdl 0.04 bdl bdl 0.02 bdl MgO CaO bdl bdl 0.01 bdl bdl bdl bdl bdl bdl bdl bdl Na 2 O K 2 O Cr 2 O bdl 0.04 bdl bdl 0.06 bdl NiO bdl bdl bdl bdl bdl bdl bdl bdl bdl 0.02 bdl bdl bdl Cl bdl bdl bdl 0.02 bdl F nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd Total Si Ti Al Fe Mn bdl bdl bdl bdl bdl bdl bdl Mg Ca bdl bdl bdl bdl bdl bdl bdl bdl bdl bdl Na K Cr bdl bdl bdl bdl Ni bdl bdl bdl bdl bdl bdl bdl bdl bdl bdl bdl bdl Cl bdl bdl bdl bdl F nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd Total Na+K+Ca Na/(Na+K)

13 Table DR 1. Continued Robertson Bay Terrane [10] Sample CR2 [8] Sample CR a 4b 5a 5b 6 7a 7b beam size 5 µm 5 µm 5 µm 5 µm 5 µm 5 µm 5 µm 5 µm 5 µm 5 µm 5 µm 5 µm 5 µm 5 µm 5 µm 5 µm 5 µm 5 µm 5 µm core core core core core core core core core core core core core rim core rim core core rim SiO TiO Al 2 O FeO MnO bdl bdl 0.02 bdl MgO CaO bdl bdl bdl bdl 0.02 bdl bdl 0.01 bdl Na 2 O K 2 O Cr 2 O bdl bdl bdl 0.04 bdl bdl bdl bdl NiO bdl bdl 0.00 bdl bdl bdl 0.03 bdl bdl Cl bdl bdl bdl bdl F nd nd nd nd nd nd nd nd nd bdl bdl bdl bdl bdl 0.01 bdl bdl bdl bdl Total Si Ti Al Fe Mn bdl bdl bdl Mg Ca bdl bdl bdl bdl bdl bdl bdl Na K Cr bdl bdl bdl bdl bdl bdl bdl Ni bdl bdl bdl bdl bdl bdl bdl Cl bdl bdl bdl bdl F nd nd nd nd nd nd nd nd nd bdl bdl bdl bdl bdl bdl bdl bdl bdl Total Na+K+Ca Na/(Na+K)

14 Table DR 2. Continued Robertson Bay Terrane [8] Sample CR2 8a 8b 9a 9b 10a 10b 11a 11b 12 13a 13b 14a 14b 15a 15b 16a 16b 17a 17b 18a core rim core rim core rim core rim core core rim core rim core rim core rim core rim core SiO TiO Al 2 O FeO MnO bdl bdl 0.05 bdl bdl MgO CaO bdl bdl 0.02 bdl bdl Na 2 O K 2 O Cr 2 O bdl bdl bdl bdl bdl bdl bdl bdl 0.03 NiO bdl bdl bdl bdl bdl bdl 0.01 bdl bdl bdl 0.00 bdl bdl Cl 0.01 bdl bdl bdl bdl bdl bdl F bdl bdl bdl bdl bdl bdl bdl bdl 0.01 bdl bdl bdl bdl bdl bdl bdl bdl bdl bdl bdl Total Si Ti Al Fe Mn bdl bdl bdl bdl Mg Ca bdl bdl bdl bdl Na K Cr bdl bdl bdl bdl bdl bdl bdl bdl Ni bdl bdl bdl bdl bdl bdl bdl bdl bdl bdl bdl Cl bdl bdl bdl bdl bdl bdl F bdl bdl bdl bdl bdl bdl bdl bdl bdl bdl bdl bdl bdl bdl bdl bdl bdl bdl bdl Total Na+K+Ca Na/(Na+K) Table DR 2. Continued

15 Robertson Bay Unit [8] Sample CR2 [5] Sample GO6 18b 19a 19b rim core rim core core core core core core core core core core core core core core core core SiO TiO Al 2 O FeO MnO bdl bdl bdl bdl 0.02 bdl 0.06 bdl bdl 0.01 MgO CaO bdl bdl 0.00 bdl bdl bdl bdl Na 2 O K 2 O Cr 2 O bdl bdl bdl bdl bdl bdl bdl bdl NiO bdl bdl bdl 0.03 bdl 0.06 bdl bdl bdl bdl bdl bdl bdl Cl F bdl bdl bdl nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd Total Si Ti Al Fe Mn bdl bdl bdl bdl bdl bdl bdl Mg Ca bdl bdl bdl bdl bdl bdl Na K Cr bdl bdl bdl bdl bdl bdl bdl bdl Ni bdl bdl bdl bdl bdl bdl bdl bdl bdl Cl F bdl bdl bdl nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd Total Na+K+Ca Na/(Na+K)

16 [5] Sample GO6 Table DR 2. Continued Robertson Bay Terrane [11] Sample CR core core core core core core core core core core core core core core core core core core core SiO TiO Al 2 O FeO MnO 0.00 bdl bdl bdl 0.01 bdl 0.00 bdl MgO CaO bdl bdl bdl bdl bdl Na 2 O K 2 O Cr 2 O 3 bdl bdl bdl 0.01 bdl bdl bdl bdl 0.01 NiO 0.02 bdl 0.02 bdl bdl bdl bdl bdl bdl bdl bdl bdl Cl bdl bdl F nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd Total Si Ti Al Fe Mn bdl bdl bdl bdl bdl Mg Ca bdl bdl bdl bdl bdl Na K Cr bdl bdl bdl bdl bdl bdl bdl Ni bdl bdl bdl bdl bdl bdl bdl bdl bdl Cl F nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd nd Total Na+K+Ca Na/(Na+K)