Debra Chappell


Full Name: Debra Chappell

Position: Senior Laboratory Technician

Contact details

Email me here
Phone: +64-7-376 1780

Specialist Profile

Debra is a Senior Laboratory in the New Zealand Geothermal Analytical Laboratory (NZGAL). Debra is the XRD analyst for GNS Science and does analyses (quantitative, clay separate), interpretations and final GNS Petrology Services report writing on both geological and non-geological samples. She is a specialist in ICP-MS and ICP-OES elemental analysis as well as elemental mercury in geothermal steams and non-condensable gases analyzed on ICP-OES. Other capabilities include radioactive iodine tracer extraction and analysis on LSC, Scanning Electron Microscopy, analysis on AAS, general analytical chemistry, logging in sample submissions from clients, creating invoices and final reports for clients.


1996: BSc(Hons), Geology; 1996: PhD, Microbiology

Areas of expertise

Business Development: Geothermal
Geochemist: Environmental geochemistry
Geochemist: Geomicrobiology
Geology: Geochemistry
Geology: Igneous Petrology
Geology: Metamorphic Petrology
Geology: Microbeam analysis
Geology: Mineral and rock indentification
Geology: Mineralogy
Technical: Analysis of Geothermal Water and Gases
Technical: Atomic Absorption Spectrometry
Technical: Computer skills
Technical: Data analysis
Technical: Electron Microscopy/ XRD
Technical: Flow Injection Hg analysis
Technical: Geochemical analysis of minerals
Technical: ICP-MS trace element analysis
Technical: ICP-OES analysis
Technical: Ion Selective Electrode
Technical: Metrohm -Titrino-autotitrators
Technical: Optimization methods and applications
Technical: Outreach - Taupo Career Roadshow
Technical: Radiation Instrumentation
Technical: SEM scanning
Technical: Sample preparation
Technical: Scanning Electron Microscopy
Technical: Training of Laboratory Staff
Technical: X-ray Fluorescence
Technical: X-ray diffraction

Professional activities

Geoscience Society of New Zealand: Member
Geochemistry Special Interest Group (GSNZ): Member

Major publications

Coombs, D.S.; Kawachi, Y.; Miura, H.; Chappell, D.A. 2004 Cerchiaraite and Ca-bearing noélbensonite from Woods mine, New South Wales, Australia. European journal of mineralogy, 16(1): 185-189

Chappell, D.A.; Craw, D. 2003 Environmental controls on iron-oxidising, sulfur-oxidising and sulfate-reducing bacteria in mine wastes, New Zealand. New Zealand Journal of Marine and Freshwater Research, 37(4): 767-775

de Ronde, C.E.J.; Faure, K.; Bray, C.J.; Chappell, D.A.; Wright, I.C. 2003 Hydrothermal fluids associated with seafloor mineralization at two southern Kermadec arc volcanoes, offshore New Zealand. Mineralium deposita, 38(2): 217-233

Chappell, D.A.; Craw, D. 2002 Geological analogue for circumneutral pH mine tailings : implications for long-term storage, Macraes Mine, Otago, New Zealand. Applied Geochemistry, 17(8): 1105-1114

Craw, D.; Chappell, D.; Black, A. 2002 Surface run-off from mineralised road aggregate, Puhipuhi, Northland, New Zealand. New Zealand Journal of Marine and Freshwater Research, 36(1): 105-116

Reay, A.; Chappell, D.; Garden, B. 2002 A new garnet-bearing mineral breccia from North Otago, New Zealand. New Zealand Journal of Geology and Geophysics, 45(4): 461-466

Craw, D.; Chappell, D.; Reay, A. 2000 Environmental mercury and arsenic sources in fossil hydrothermal systems, Northland, New Zealand. Environmental geology, 39(8): 875-887

Craw, D.; Chappell, D.; Reay, A.; Walls, D. 2000 Mobilisation and attenuation of arsenic around gold mines, east Otago, New Zealand. New Zealand Journal of Geology and Geophysics, 43(3): 373-383; doi: 10.1080/00288306.2000.9514894

Craw, D.; Chappell, D.A. 2000 Metal redistribution in historic mine wastes, Coromandel Peninsula, New Zealand. New Zealand Journal of Geology and Geophysics, 43(2): 187-198; doi: 10.1080/00288306.2000.9514880

Craw, D.; Chappell, D.; Nelson, M.; Walrond, M. 1999 Consolidation and incipient oxidation of alkaline arsenopyrite-bearing mine tailings, Macraes Mine, New Zealand. Applied Geochemistry, 14(4): 485-498

de Ronde, C.E.J.; Faure, K.; Wright, I.C.; Chappell, D.A. 1997 Base and precious metal mineralization associated with volcanoes of the southern Kermadec Arc, New Zealand. Eos, 78(46:supplement): F738

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