Milcarpa 1 borehole completion record 2018-05-14آ  Figure 3.1: Mud rotary chip sample layout at the

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  • Record 2018/13 | eCat 117123 Geological Survey of New South Wales Record GS2018/0199

    Milcarpa 1 borehole completion record Southern Thomson Project

    I. C. Roach, K. F. Bull, D. C. Champion, A. J. Cross, C. B. Folkes, P. Gilmore, R. Hegarty, S. L. Jones and D. B. Tilley

    APPLYING GEOSCIENCE TO AUSTRALIA’S MOST IMPORTANT CHALLENGES www.ga.gov.au

  • Milcarpa 1 borehole completion record

    Southern Thomson Project

    GEOSCIENCE AUSTRALIA RECORD 2018/13 GEOLOGICAL SURVEY OF NEW SOUTH WALES RECORD GS2018/0199

    I. C. Roach1, K. F. Bull2, D. C. Champion1, A. J. Cross1, C. B. Folkes2, P. Gilmore2, R. Hegarty3, S. L. Jones1 and D. B. Tilley2

    1. Geoscience Australia. 2. Geological Survey of New South Wales 3. Formerly Geological Survey of New South Wales.

  • Department of Industry, Innovation and Science Minister for Resources and Northern Australia: Senator the Hon Matthew Canavan Secretary: Heather Smith PSM

    Geoscience Australia Chief Executive Officer: Dr James Johnson

    Department of Planning and Environment, New South Wales Minister: The Hon Don Harwin MLC Secretary: Ms Carolyn McNally

    Geological Survey of New South Wales Executive Director: Dr Chris Yeats

    This paper is published with the permission of the CEO, Geoscience Australia and the Executive Director, Geological Survey of New South Wales.

    © Commonwealth of Australia (Geoscience Australia) 2018 and State of New South Wales (Geological Survey of New South Wales) 2018.

    With the exception of the Commonwealth Coat of Arms and where otherwise noted, this product is provided under a Creative Commons Attribution 4.0 International Licence. (http://creativecommons.org/licenses/by/4.0/legalcode)

    Geoscience Australia has tried to make the information in this product as accurate as possible. However, it does not guarantee that the information is totally accurate or complete. Therefore, you should not solely rely on this information when making a commercial decision.

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    ISSN 2201-702X (PDF) ISBN 978-1-925297-83-6 (PDF) eCat 117123

    Bibliographic reference: Roach, I. C., Bull, K. F., Champion, D. C., Cross, A. J., Folkes, C. B., Gilmore, P., Hegarty, R., Jones, S. L., Tilley, D. B. 2018. Milcarpa 1 borehole completion record: Southern Thomson Project. Record 2018/13. Geoscience Australia, Canberra. Geological Survey of New South Wales Record GS2018/0199. http://dx.doi.org/10.11636/Record.2018.013

    Version: 1701

    http://creativecommons.org/licenses/by/4.0/legalcode mailto:clientservices@ga.gov.au http://dx.doi.org/10.11636/Record.2018.013

  • Milcarpa 1 borehole completion record iii

    Contents

    1 Introduction ............................................................................................................................................ 1 1.1 The Southern Thomson Project ....................................................................................................... 1

    2 Borehole rationale, location and construction ....................................................................................... 3 2.1 Rationale and location ..................................................................................................................... 3 2.2 Borehole construction ...................................................................................................................... 6

    3 Lithology, petrography, stratigraphy, igneous geochemistry and U-Pb isotopic age ..........................10 3.1 Introduction ....................................................................................................................................10 3.2 Lithology .........................................................................................................................................11 3.3 Basement rock petrography ...........................................................................................................13 3.4 Geochemistry and U-Pb isotopic age ............................................................................................14 3.5 Stratigraphy ....................................................................................................................................15 3.6 Synthesis within the regional stratigraphic framework ...................................................................17

    4 Borehole and drill core rock properties ................................................................................................19 4.1 Introduction ....................................................................................................................................19 4.2 Rock properties measurements .....................................................................................................19 4.3 Results and interpretation ..............................................................................................................19

    4.3.1 Natural gamma .........................................................................................................................19 4.3.2 Induction conductivity ...............................................................................................................20 4.3.3 Magnetic susceptibility .............................................................................................................22 4.3.4 Bulk density and apparent porosity ..........................................................................................23

    4.4 Rock properties data package .......................................................................................................23

    5 HyLogger data .....................................................................................................................................24 5.1 HyLogger data acquisition and processing ....................................................................................24 5.2 Results ...........................................................................................................................................25

    5.2.1 Milcarpa 1 mud rotary chips .....................................................................................................25 5.2.2 Milcarpa 1 diamond drill core ...................................................................................................26

    5.3 Comparison with other logging ......................................................................................................26 5.4 HyLogger data package .................................................................................................................29 5.5 HyLogger data reprocessing ..........................................................................................................29

    6 Groundwater ........................................................................................................................................30

    7 Acknowledgements .............................................................................................................................31

    8 References ..........................................................................................................................................32

    Appendix A Borehole construction .........................................................................................................36

    Appendix B Drilling activities and consumables .....................................................................................38

    Appendix C Petrophysical equipment details .........................................................................................40 C.1 Borehole wireline logging equipment ............................................................................................40 C.2 Hand-held magnetic susceptibility logging equipment ..................................................................40 C.3 Analytical balance equipment (density determination) ..................................................................40

    Appendix D Petrophysical data acquisition and processing ...................................................................41 D.1 Data acquisition and processing ...................................................................................................41 D.2 Equipment calibration ....................................................................................................................41

  • iv Milcarpa 1 borehole completion record

    D.3 Data processing ............................................................................................................................42

    Appendix E Lithological and stratigraphic log.........................................................................................43 Appendix F Whole-rock geochemistry ....................................................................................................45

    Appendix G Metallogenic and Igneous classifications ...........................................................................48

    Appendix H Borehole log ........................................................................................................................51

  • Milcarpa 1 borehole completion record v

    Figures

    Figure 1.1: Location of the Thomson Orogen in eastern Australia. The red box encompasses the Southern Th