Precambrian Research

Fangcheng Manuscript dataset

This supplementary material reproduces analyses discussed in the paper "Paleomagnetism and Stability of Dharwar Craton, India".

Appendices - raw whole-rock and Nd-isotope data for the lower Paleoproterozoic Francevillian Group sediments, Gabon

Here we provide 3 spreadsheets with all the primary data (as received from the from the Laser Ablation ICP-MS facility at University of New Brunswick) LA-ICP-MS (Laser Ablation - Induced Coupled Plasma - Mass Spectrometry) performed on samples of stromatolitic dolostone from the Lower Transvaal Supergroup in Botswana. These files contain the raw data of LA-ICP-MS as received from the laboratory at the University of New Brunswick (Canada). The analyses have been performed on Neoarchean stromatolitic dolostone from the Ramonnedi Formation (lower Transvaal Supergroup) of Botswana. Each file contains 2 spreadsheets, one with results reduced using NCS610 standard and the other one with results reduced using MACS standard. Below is a description of the content of the spreadsheets. Columns A-B: reference material and source file name (internal laboratory code); Columns C-E: date and time of the execution of the analyses Column F: duration of the analyses Column G: name of the sample analyzed Column H: calcium content in Counts Per Second Column I: Internal Standard Error Columns J - BU: trace element concentrations and internal standard errors. LA-ICP-MS analysis has been carried out on thin sections at the Laser Ablation ICP-MS facility at University of New Brunswick (UNB), Fredericton (Canada), using an Agilent 7700x ICP-MS coupled with a Coherent CompexPro 110 (193 nm Excimer laser) and a Resonetics M-50-LR laser ablation system. Carbonate analyses were performed using a 33µm spot size with a repetition rate of 3Hz and an on-sample energy of 5J/cm2, with a 30s ablation and a 30s gas blank between each ablation. Carrier gasses were ultra-pure helium (300 ml/min), ultra-pure nitrogen (2 ml/min), and standard Argon (930 ml/min). The second rotary pump was also used which almost doubles the sensitivities of heavy isotopes. A full suite of elements was monitored during tuning to ensure maximum sensitivity over the range of masses we were analyzing, while keeping doubly charged ions and oxides at a maintainable level (below 0.3% for each). Standards used were NIST610 and MACS-3. Calcium was used as an internal standard for data reduction of carbonate samples. The dwell times for most isotopes were kept at 0.01 sec per isotope, allowing us the lowest possible sweep time for each method. We also provide a zip file with the R codes for the clustering, MANOVA, and discriminant analysis and the table with the primary data in the right format for running the codes.

These files contain the raw data of LA-ICP-MS as received from the laboratory at the University of New Brunswick (Canada). The analyses have been performed on Neoarchean stromatolitic dolostone from the Ramonnedi Formation (lower Transvaal Supergroup) of Botswana. Each file contains 2 spreadsheets, one with results reduced using NCS610 standard and the other one with results reduced using MACS standard. Below is a description of the content of the spreadsheets. Columns A-B: reference material and source file name (internal laboratory code); Columns C-E: date and time of the execution of the analyses Column F: duration of the analyses Column G: name of the sample analyzed Column H: calcium content in Counts Per Second Column I: Internal Standard Error Columns J - BU: trace element concentrations and internal standard errors. Methods Ten (10) thin sections of dolostone have been investigated for their geochemical composition using LA-ICP-MS. LA-ICP-MS analysis has been carried out on thin sections at the Laser Ablation ICP-MS facility at University of New Brunswick (UNB), Fredericton (Canada), using an Agilent 7700x ICP-MS coupled with a Coherent CompexPro 110 (193 nm Excimer laser) and a Resonetics M-50-LR laser ablation system. Carbonate analyses were performed using a 33µm spot size with a repetition rate of 3Hz and an on-sample energy of 5J/cm2, with a 30s ablation and a 30s gas blank between each ablation. Carrier gasses were ultra-pure helium (300 ml/min), ultra-pure nitrogen (2 ml/min), and standard Argon (930 ml/min). The second rotary pump was also used which almost doubles the sensitivities of heavy isotopes. A full suite of elements was monitored during tuning to ensure maximum sensitivity over the range of masses we were analyzing, while keeping doubly charged ions and oxides at a maintainable level (below 0.3% for each). Standards used were NIST610 and MACS-3. Calcium was used as an internal standard for data reduction of carbonate samples. The dwell times for most isotopes were kept at 0.01 sec per isotope, allowing us the lowest possible sweep time for each method.

Geochemical and geochronological data from the Eastern Ghats Belt, India.

Geochemical data set of cherts and siliceous sediments from the Precambrian-Cambrian boundary at two sites in Kazakhstan. The data set includes Si isotope data, C and O isotope data and major-and trace element data.

This data set including two files which are linked to Wu et al. submitted to Precambrian Research for publication.

This is a supplementary dataset for the paper entitled "Iodine records from the Ediacaran Doushantuo cap carbonates of the Yangtze Block, South China".

Table S1 Major and trace element compositons for the Yudongzi TTG and mafic-intermediate rocks as well as Huji-Wangji granites in the Yangtze Craton. Table S2 SHRIMP zircon U-Pb dating results for the Yudongzi TTG and mafic-intermediate rocks as well as Huji-Wangji granites in the Yangtze Craton. Talbe S3 LA-ICPMS zircon U-Pb dating results for metamafic rock 15QL34 in the Yudongzi Group. Talbe S4 SIMS zircon oxygen isotope results for the Yudongzi TTG and mafic-intermediate rocks as well as Huji-Wangji granites in the Yangtze Craton. Talbe S5 LA-MCICPMS zircon Lu-Hf isotope results for the Yudongzi TTG and mafic-intermediate rocks as well as Huji-Wangji granites in the Yangtze Craton. Talbe S6 Whole-rock Sm-Nd and Lu-Hf isotope results for the Yudongzi TTG and mafic-intermediate rocks as well as Huji-Wangji granites in the Yangtze Craton. Talbe S7 Mineral oxygen isotope results for the Yudongzi TTG and mafic-intermediate rocks as well as Huji_Wangji granites in the Yangtze Craton.