Work Description

Date: 6 November, 2019

Dataset Title: Sedimentary response to collisional orogeny recorded in detrital zircon provenance of Greater Caucasus foreland basin sediments: Supplemental data tables

Dataset Creators: Tye, Alexander R, Niemi, Nathan A, Safarov, Rafig T, Kadirov, Fakhraddin A, Babayev, Gulam R

Dataset Contact: Alexander Tye (alextye@umich.edu)

Funding: EAR-1524304 (NSF), University of Michigan Rackham Graduate School, University of Michigan International Institute, University of Michigan Department of Earth and Environmental Sciences

Key Points:
- We use a comprehensive new detrital zircon U-Pb age dataset to trace changes in sediment provenance resulting from continental collision in the Caucasus
- 7,090 new detrital zircon U-Pb ages are reported from 29 samples

Research Overview:
Zircons are widely used as a tracker of sediment provenance owing to their ability to be dated using the U-Pb system and their resistance to weathering at the Earth's surface. The zircon U-Pb ages reported here are part of a study of the effects of the initiation of continental collision on orogenic erosion and foreland basin sediment routing. For an interpretation of the data, the reader is directed to the publication that makes use of these data, Tye et al., in review, Basin Research [this will be updated upon publication].

Methodology:
We report 29 new detrital zircon U-Pb age samples (Table S1) from Cenozoic sandstones and modern river sands comprising 7,094 total ages (Table S2). Mineral separation was conducted at the University of Michigan. Heavy mineral fractions were mounted in epoxy and polished to expose crystal interiors. Mounts were made of entire heavy mineral fractions, rather than hand selected individual zircons, in order to ensure representative random samples of zircons were analyzed. Mount imaging was conducted at the University of Michigan and the University of Arizona Laserchron Center. U-Pb analyses were conducted at the University of Arizona Laserchron Center using a laser ablation system attached to a Thermo Element 2 single collector ICP-MS (Gehrels et al., 2008; Pullen et al., 2014). Analyses > 20% discordant are excluded from further interpretation.
Where practical, we analyze at least 300 zircons per sample, which provides more robust characterization of zircon age signatures than analyses with typical (n ~ 100) sample sizes (Pullen et al., 2014). Quantities reported were calculated at the University of Arizona Laserchron Center following Gehrels et al. (2008).

In order to assess differences in detrital zircon U-Pb age distributions in this study, we use the comparative metric Bayesian Population Correlation values (Tye et al., 2019), which quantifies the correspondence between every possible pair of samples (BPC values shown in Table S3, BPC uncertainties shown in Table S4).

Instrument and/or Software specifications: Isotope ratios were measured using a Thermo Element 2 single collector ICPMS

Files contained here:
TableS1.csv - locations of new samples reported in this dataset
In this file, we report the sample names (publication names and names under which they were initially collected in the field), latitude (degrees North), longitude (degrees East), and mapped geologic age according to Soviet 1:200,000 geologic maps of the Caucasus and the compilation of Nalivkin, 1976.

TableS2.csv - data tables of detrital zircon U-Pb analyses
This file contains all the data from analyses performed on each sample collected in the Caucasus region. The file is divided into table blocks associated with each reported sample. The publication and collection name of each sample is listed above its block, and a header describes the column values for each block. Column headings are as follows:
Analysis--the laser spot number associated with a particular measurement
U (ppm)--U concentration in ppm
206Pb/204Pb--measured ratio of 206/204
U/Th--measured U/Th ratio
206Pb*/207Pb*--measured 206/207 ratio corrected for common Pb inferred from 206/204 ratio (* indicates inferred radiogenic)
+/-(%)--percent error on above
207Pb*/235U*--ratio of inferred radiogenic 207Pb to inferred 235U calculated as a fraction of measured 238U (see Gehrels et al., 2008)
+/-(%)--percent error on above
206Pb*/238U--ratio of inferred radiogenic 206Pb to measured 238U
+/-(%)--percent error on above
error corr.--error correlation
206Pb*/238U*--age calculated from 206Pb/238U ratio in Ma (millions of years old)
+/-(Ma)--error on above in millions of years
207Pb*/235U--age calculated from 207Pb/235U ratio in Ma (millions of years old)
+/-(Ma)--error on above in millions of years
206Pb*/207Pb*--age calculated from 206Pb/207Pb ratio in Ma (millions of years old)
+/-(Ma)--error on above in millions of years
Best age (Ma)--this column displays whichever of the three ages has the smallest error
+/-(Ma)--error on above in millions of years
Conc (%)--concordance %, only calculated for ages >400 Ma (ages <400 Ma marked NA)

TableS3.csv - Bayesian Population Correlation comparisons of samples to one another
This file contains the values of the Bayesian Population Correlation comparative metric for all possible comparisons of samples reported here and published samples from the region. The column and row headings list the names of all detrital zircon U-Pb age samples analyzed using BPC, and previously published samples have their citation listed. Each cell shows the BPC value of the comparison between the sample indicated by its row heading and the sample indicated by its column heading. The matrix is symmetrical.

TableS4.csv - Bayesian Population Correlation uncertainties
This file contains Bayesian Population Correlation uncertainties for all inter-sample comparisons shown in TableS3.csv. Row and column headings are as TableS3.csv.

Related publication(s):
Tye, Alexander R, Niemi, Nathan A, Safarov, Rafig T, Kadirov, Fakhraddin A, Babayev, Gulam R, Sedimentary response to collisional orogeny recorded in detrital zircon provenance of Greater Caucasus foreland basin sediments. In review, Basin Research.

Use and Access:
This data set is made available under a Creative Commons Public Domain license (CC0 1.0).

To Cite Data:
Tye, A. (2019). Sedimentary response to collisional orogeny recorded in detrital zircon provenance of Greater Caucasus foreland basin sediments: Supplemental data tables [Data set]. University of Michigan - Deep Blue. https://doi.org/10.7302/xay7-8a71

References:
Nalivkin, D. V. (1976). Geologic map of the Caucasus (in Russian). Ministry of Geology, Union of Soviet Socialist Republics.

Allen, M. B., Morton, A. C., Fanning, C. M., Ismail-Zadeh, A. J., & Kroonenberg, S. B. (2006). Zircon age constraints on sediment provenance in the Caspian region. Journal of the Geological Society, 163(4), 647-655.

Gehrels, G. E., Valencia, V. A., & Ruiz, J. (2008). Enhanced precision, accuracy, efficiency, and spatial resolution of U‐Pb ages by laser ablation–multicollector–inductively coupled plasma–mass spectrometry. Geochemistry, Geophysics, Geosystems, 9(3).

Wang, C. Y., Campbell, I. H., Stepanov, A. S., Allen, C. M., & Burtsev, I. N. (2011). Growth rate of the preserved continental crust: II. Constraints from Hf and O isotopes in detrital zircons from Greater Russian Rivers. Geochimica et Cosmochimica Acta, 75(5), 1308-1345.

Vincent, S. J., Morton, A. C., Hyden, F., & Fanning, M. (2013). Insights from petrography, mineralogy and U–Pb zircon geochronology into the provenance and reservoir potential of Cenozoic siliciclastic depositional systems supplying the northern margin of the Eastern Black Sea. Marine and Petroleum Geology, 45, 331-348.

Pullen, A., Ibáñez-Mejía, M., Gehrels, G. E., Ibáñez-Mejía, J. C., & Pecha, M. (2014). What happens when n= 1000? Creating large-n geochronological datasets with LA-ICP-MS for geologic investigations. Journal of Analytical Atomic Spectrometry, 29(6), 971-980.

Cowgill, E., Forte, A. M., Niemi, N., Avdeev, B., Tye, A., Trexler, C., Javakhishvili, Z., Elashvili, M., & Godoladze, T. (2016). Relict basin closure and crustal shortening budgets during continental collision: An example from Caucasus sediment provenance. Tectonics, 35(12), 2918-2947.

Abdullayev, N. R., Weber, J., van Baak, C. G., Aliyeva, E., Leslie, C., Riley, G. W., O'Sullivan, P., & Kislitsiyn, R. (2018). Detrital zircon and apatite constraints on depositional ages, sedimentation rates and provenance: Pliocene Productive Series, South Caspian Basin, Azerbaijan. Basin Research, 30(5), 835-862.

Trexler, C.C., 2018. Structural Investigations of the Tectonic History of the Western
Greater Caucasus Mountains, Republic of Georgia. PhD dissertation. University of California, Davis.

Tye, A. R., Wolf, A. S., & Niemi, N. A. (2019). Bayesian population correlation: A probabilistic approach to inferring and comparing population distributions for detrital zircon ages. Chemical Geology, 518, 67-78.