This README.txt file was generated on 08-03-2022 by N. Harrichhausen


GENERAL INFORMATION

1. Title of Dataset: Eocene Terrane Accretion in Northern Cascadia Recorded by Brittle Left-lateral Slip on the San Juan Fault. Dryad, Dataset.

2. Author Information
	A. Principal Investigator Contact Information
		Name: Nicolas Harrichhausen	
		Institution: ISTerre, Université Grenoble Alpes	
		Address: Grenoble, France
		Email: n.harrichhausen@univ-grenoble-alpes.fr


3. Date of data collection (05/2017 - 07/2019)

4. Geographic location of data collection: San Juan fault, southern Vancouver Island, British Columbia, Canada

5. Information about funding sources that supported the collection of the data: Funding for this project is provided by National Science Foundation Earth Science772
(NSF EAR) grant #1756943 to K. Morell, and NSF EAR grant # 1756834 to C. Regalla. Additionally, N. Harrichhausen was supported by a National Science and Engineering Research Council (NSERC) Post Graduate Scholarship and Geological Society of America (GSA) Grad Student Research Grant. 


SHARING/ACCESS INFORMATION

1. Licenses/restrictions placed on the data: Data under copyright of: Harrichhausen, N. J. (2021). Fault Accommodation of Permanent Strain in the Northern Cascadia Forearc. University of California, Santa Barbara.


2. Links to publications that cite or use the data: 

Harrichhausen, N. J. (2021). Fault Accommodation of Permanent Strain in the Northern Cascadia Forearc. University of California, Santa Barbara.

Harrichhausen, N., Morell, K. D., Regalla, C., Lynch, E. M., & Leonard, L. J. (Submitted). Eocene Terrane Accretion in Northern Cascadia Recorded by Brittle Left-lateral Slip on the San Juan Fault. Tectonics.


3. Recommended citation for this dataset: Harrichhausen, N., Morell, K. D., Regalla, C., Lynch, E. M., & Leonard, L. J. (2022). Eocene Terrane Accretion in Northern Cascadia Recorded by Brittle Left-lateral Slip on the San Juan Fault. Dryad, Dataset. doi: 10.25349/D9CD03


DATA & FILE OVERVIEW

1. File List: 

SJF_2022_Supplement_otherstructures.xlsx
All_Fault_Kin_SJF2022_submission.xlsx
SJHarrichhausen_2022_Sr_results.xlsx
README.txt


METHODOLOGICAL INFORMATION

1. Description of methods used for collection/generation of data: 

Structural data: Foliation, bedding, and fault planes, along with fault plane slickenlines were measured at at outcrops using a brunton compass. UTM coordinates (NAD83 / BC Albers, Zone 10) are provided with each data point. 

Fault plane slickenline slip sense was determined using kinematic indicators (e.g., Doblas, 1998).

2 kg samples of sedimentary rock were collected for foraminifer Sr isotope analyses. Sample locations are on Fig. 3, and Fig 4 in Harrichhausen et al., (Submitted). In preparation for strontium (Sr) isotope analyses, the same species of foraminifers were hand-picked from a specific sample residue by selecting the most abundant and diagnostic species with the least diagenetic and thermal alteration of specimens.


2. Methods for processing the data: 

Bedding and foliation planes were plotted and analyzed using Stereonet 10.1.6 software (Allmendinger et al., 2011; Cardozo & Allmendinger, 2013). 

Fault plane slickenline orientations are grouped into populations based on variables such as outcrop location, fault plane strike, and lithology. Principal kinematic axes (incremental strain axes) and P- and T-dihedra for each fault plane were calculated using FaultKin 8.1.2 software (Marrett & Allmendinger, 1990; Allmendinger et al., 2011). 


3. Instrument- or software-specific information needed to interpret the data: 

Stereonet 10.1.6 and FaultKin 8.1.2, used for structural analyses and kinematic inversions. Both are publically available at https://www.rickallmendinger.net/

Strontium (87/86Sr) isotope analyses were completed at the University of Waterloo by the Thermal Ionization Mass Spectrometry (TIMS) Facility, using a Thermo Finnigan Triton instrument. 


4. Standards and calibration information, if appropriate: 

87/86Sr results were obtained using 120 measurements, with raw data normalized using 88/86Sr = 8.375209 and corrected against the NIST987 standard reference material where 87/86Sr = 0.710248 (McArthur et al., 2020). 87/86Sr results are presented to 6 decimal points as raw normalized to NIST-SRM-987 and USGS237 EN-1 standards. Strontium isotope age is determined using a McArthur LOWESS 5 Best Fit 26 03 13 look-up table (McArthur et al., 2020).


5. People involved with sample collection, processing, analysis and/or submission:

M. Johns, M. Makahnouk, E. Humphrey, K. Johnson, S. Mracek, C. Anderson, S. Dyer, and C. Green all assisted in data collection, processing, and/or analyses. 


DATA-SPECIFIC INFORMATION: Information on variable are provided in excel spreadsheets.  


REFERENCES:

Allmendinger, R. W., Cardozo, N., & Fisher, D. M. (2011). Structural geology algorithms: Vectors and tensors. Cambridge University Press.

Allmendinger, R. W., Gephart, J. W., & Marrett, R. A. (1989). Notes on fault slip analysis. Geological Society of America Short Course on Quantitative Interpretation of Joints and Faults , 66 , 1.

Cardozo, N., & Allmendinger, R. W. (2013). Spherical projections with OSXStereonet. Computers & Geosciences , 51 , 193–205

Doblas, M. (1998). Slickenside kinematic indicators. Tectonophysics , 295 (1-2), 187–197.

Harrichhausen, N., Morell, K. D., Regalla, C., Lynch, E. M., & Leonard, L. J. (Submitted). Eocene Terrane Accretion in Northern Cascadia Recorded by Brittle Left-lateral Slip on the San Juan Fault. Tectonics.

Marrett, R., & Allmendinger, R. W. (1990). Kinematic analysis of fault-slip data. Journal of structural geology , 12 (8), 973–986.

McArthur, J., Howarth, R., Shields, G., & Zhou, Y. (2020). Chapter 7 - Strontium Isotope Stratigraphy. In F. M. Gradstein, J. G. Ogg, M. D. Schmitz, & G. M. Ogg (Eds.), Geologic time scale 2020 (Vol. 1, pp. 211–238). Elsevier.