Forensic Geology and Geoforensics: Isotope Provenance and Geophysical Survey Methods
Published:
Questions
30
Duration
30 min
Faculty-reviewed
0
Updated
18 Jun 2026
About this mock
This mock test covers the advanced isotope geochemistry and geophysical methods that underpin forensic geological provenance work. Questions address the principles of stable and radiogenic isotope fractionation, strontium and lead isotope systematics, oxygen and hydrogen isoscape modelling, multi-isotope gem and mineral attribution, and the physical contrasts that geophysical survey instruments detect when locating buried targets.
Topics span ICP-MS and TIMS measurement of isotope ratios, the 87Rb-87Sr decay system and initial-ratio correction, common-lead corrections in U-Pb geochronology, the meteoric water line, Craig's equations relating delta-18O and delta-D in global precipitation, the OIPC isoscape model, REE and trace-element co-analysis for diamond and emerald provenance, ground-penetrating radar dielectric permittivity contrasts, fluxgate gradiometer sensitivity to magnetic susceptibility anomalies, and depth-of-investigation limits imposed by soil conductivity.
Audience: students, MSc and BSc learners, and practitioners of forensic Forensic Geology and Geoforensics who need to integrate isotope laboratory data with scene-based geophysical survey decisions.
Topics covered:
- Isotope fractionation: equilibrium versus kinetic and delta notation
- Strontium isotope systematics and 87Rb-87Sr decay
- Lead isotope ratios and common-lead corrections
- Oxygen and hydrogen isoscapes (OIPC, GNIP, Craig's line)
- Multi-isotope gem provenance: diamond, emerald, sapphire
- REE and trace-element co-fingerprinting
- GPR dielectric permittivity and signal attenuation
- Magnetometry and earth-resistance survey principles
This set is calibrated to the precision expected in advanced forensic geology assessments. Allow 30 minutes.
Sources & references
Questions in this mock are written and verified against the following sources. Citations are recorded per question and shown in the explanation after submission.
- cited in 6 questions
Faure, Gunter and Mensing, Teresa M. — Isotopes: Principles and Applications, 3rd Edition
Chapter 4: Isotope Fractionation — Kinetic versus Equilibrium Effects
- cited in 2 questions
Jol, Harry M. (ed.) — Ground Penetrating Radar Theory and Applications
Elsevier, 2009 — Chapter 1: Theory of GPR signal propagation and attenuation
- cited in 2 questions
Conyers, Lawrence B. — Ground-Penetrating Radar for Archaeology, 3rd Edition
AltaMira Press, 2012 — Chapter 6: GPR Data Processing — Migration and velocity analysis
- cited in 2 questions
Montgomery, Janet — Passports from the Past: Investigating Human Dispersals Using Strontium Isotope Analysis of Tooth Enamel
Annals of Human Biology, 37(3), 2010 — Biological fractionation of Sr isotopes
- cited in 1 question
Peucat, J.J. et al. — Trace-Element (SIMS) and Isotopic (Sm-Nd) Measurements in Rubies
Chemical Geology, 240(1-2), 2007 — Fe/Ti discrimination in corundum provenance
- cited in 1 question
Telford, W.M., Geldart, L.P. and Sheriff, R.E. — Applied Geophysics, 2nd Edition
Cambridge University Press, 1990 — Chapter 2: Sampling Theory and Aliasing in Geophysical Surveys
- cited in 1 question
Nakamura, Yutaka — A Method for Dynamic Characteristics Estimation of Subsurface Using Microtremor on the Ground Surface
Quarterly Report of Railway Technical Research Institute, 30(1), 1989 — HVSR resonance formula and layer thickness
- cited in 1 question
Dalan, Rinita A. and Banerjee, Subir K. — Solving Archaeological Problems Using Magnetic Susceptibility
Geoarchaeology, 13(1), 1998 — Pedogenic enhancement and topsoil mixing in susceptibility anomalies
- cited in 1 question
Clark, Anthony J. — Seeing Beneath the Soil: Prospecting Methods in Archaeology, Revised Edition
Batsford, 1996 — Chapter 3: Earth Resistance Survey — Twin-probe and Wenner configurations
- cited in 1 question
Stacey, J.S. and Kramers, J.D. — Approximation of Terrestrial Lead Isotope Evolution by a Two-Stage Model
Earth and Planetary Science Letters, 26(2), 1975 — The Stacey-Kramers model
- cited in 1 question
Dansgaard, Willi — Stable Isotopes in Precipitation
Tellus, 16(4), 1964 — Altitude and continental effects on delta-18O in precipitation
- cited in 1 question
Pringle, J.K. et al. — Time-Lapse Geophysical Investigations Over a Simulated Clandestine Grave
Journal of Forensic Sciences, 57(6), 2012 — ERT resistivity changes during decomposition
- cited in 1 question
Sheriff, Robert E. and Geldart, Lloyd P. — Exploration Seismology, 2nd Edition
Cambridge University Press, 1995 — Chapter 4: Seismic Refraction Travel-Time Curves
- cited in 1 question
Lemiere, Bruno — A Review of pXRF (Field Portable X-ray Fluorescence) Applications for Applied Geochemistry
Journal of Geochemical Exploration, 188, 2018 — pXRF field errors and calibration drift
- cited in 1 question
Pirrie, Duncan and Ruffell, Alastair (eds.) — Environmental and Criminal Geoforensics
Geological Society Special Publication 384, 2013 — Likelihood ratios and reference populations in soil comparison
- cited in 1 question
Craig, Harmon — Isotopic Variations in Meteoric Waters
Science, 133(3465), 1961 — The Global Meteoric Water Line equation
- cited in 1 question
Giuliani, Gaston et al. — Oxygen Isotope Systematics of Emerald: Relevance for its Origin and Geological Significance
Mineralogy and Petrology, 78(3-4), 2003 — Colombian vs. Zambian multi-isotope discrimination
- cited in 1 question
Pearson, D.G. et al. — Re-Os, Sm-Nd and Rb-Sr Isotope Evidence for Age and Origin of Pyropic Garnets
Chemical Geology, 103(1-4), 1995 — Sulfide inclusion Re-Os ages in diamonds
- cited in 1 question
Pringle, J.K. et al. — Geophysical Monitoring of Simulated Clandestine Burials Over Time
Journal of Applied Geophysics, 62(3), 2007 — Method comparison and soil conductivity effects
- cited in 1 question
Ehleringer, James R. et al. — Hydrogen and Oxygen Isotope Ratios in Human Hair Are Related to Geography
Proceedings of the National Academy of Sciences, 105(8), 2008 — Cortical keratin as primary analytical fraction
- cited in 1 question
Clark, Ian D. and Fritz, Peter — Environmental Isotopes in Hydrogeology, 2nd Edition
Chapter 1: Isotope Fundamentals — Reference Standards and Delta Notation
- cited in 1 question
Bowen, G.J. and Wilkinson, B. — Spatial Distribution of delta-18O in Meteoric Precipitation
Geology, 30(4), 2002 — OIPC model and GNIP dataset as primary input
How our mocks are built
Questions are written and edited by the ForensicSpot team and cited from peer-reviewed forensic textbooks, official syllabi and primary case law. Each one is verified before publishing. Detailed explanations show after you submit, so the test stays a real test. See a mistake? Tell us.
Common questions
What does the Forensic Geology and Geoforensics: Isotope Provenance and Geophysical Survey Methods mock cover?+
This mock test covers the advanced isotope geochemistry and geophysical methods that underpin forensic geological provenance work. Questions address the principles of stable and radiogenic isotope fractionation, strontium and lead isotope systematics, oxygen and hydrogen isoscape modelling, multi-isotope gem and mineral attribution, and the physical contrasts that geophysical survey instruments detect when locating buried targets. Topics span ICP-MS and TIMS measurement of isotope ratios, the 8
How many questions and how long is the test?+
30 multiple-choice questions, 30 minutes total. Difficulty: hard. Tier: Premium.
Who is this mock for?+
Forensic science students and aspirants who want timed, exam-style practice with explanations and verified source citations on Forensic Geology and Geoforensics. Useful for postgraduate entrance preparation and for BSc / MSc forensic students testing their recall under time.
Are the questions reviewed?+
Each question carries a verified source citation. Faculty review for individual questions is in progress.
Do I need an account to take this mock?+
Yes, a free ForensicSpot account is required to start a timed attempt — this lets you save progress, see per-question explanations after submission, and track your topic-level performance over time.