DANIEL T. HALFORD, PhD
Geological insight. A higher perspective.
I help explorers, investors, government agencies and tribal nations understand where helium, natural hydrogen and CO₂ come from, how they move, and where they collect. I combine field sampling, noble gas and isotope geochemistry, and quantitative modeling to make decisions that hold up.
From first sample to final decision.
Where it forms, how it moves, where it's trapped.
Helium source, migration and accumulation models for prospects and basins, built on noble gas isotopes, structural geology, heat flow and geophysics.
Separating real signals from artifacts.
Assessment of geologic H₂ occurrences, combining bulk gas and noble gas data with rock-crushing and fusion experiments that measure H₂ released from rocks.
Understanding CO₂ from source to sink.
Quantifying CO₂–water interactions in aquifers (dissolution, precipitation, partitioning and migration) and their effect on helium and on CO₂ storage.
Sampling plans to determine resource potential.
Design and leadership of soil-gas, well-gas and water sampling campaigns, plus interpretation of gas composition, stable isotope and noble gas data.
A geologic basis for development.
Mineral and fluid resource assessments, from critical elements, precious stones and aggregate to helium, oil and gas, built in Petra and ArcGIS.
Clear answers for decision-makers.
Independent technical review and commercial screening, including supply chains and midstream–downstream economics, written for boards, investors and tribal councils.
Field, laboratory and model, connected end to end.
Plan and lead sampling campaigns: well gas, soil gas, water, core and outcrop. Collect the data the question needs, and nothing it doesn't.
Gas chromatography, isotope-ratio and noble gas mass spectrometry, with rigorous, reproducible methods and clear uncertainty.
Solubility, mass-balance, heat-flow and statistical models that turn measurements into source, migration and accumulation estimates.
Plain-language findings, maps and recommendations that clients and communities can act on, with the limitations stated.
Research and applied projects across the western US and Canada.
Navajo Nation, Four Corners area
Secured US $80,925 to fund noble gas isotopic analysis of helium wells. Identified the sources and controls on high-helium reservoirs to inform resource decisions.
Greater Yellowstone region
Combined noble gas isotopes and heat-flow modeling to show how a major thermal anomaly mobilizes helium from the crust, with direct implications for exploration near intrusions.
Statistical exploration models
Quantified the role of faults and intrusions in helium-rich fields, and paired soil-gas geochemistry with geological and geophysical data to build statistical helium exploration models.
Funded by the Saskatchewan Geological Survey
Integrating noble gas isotopic and bulk gas data with geologic and geophysical datasets to evaluate geologic hydrogen and helium accumulations (CAD $40,000, 2025–2026).
BIA Division of Energy & Mineral Development, 2015–2024
Led assessments of critical elements, precious stones, aggregate, helium, hydrogen, CO₂, and oil and gas, from sample analysis and mapping to supply-chain and economic viability. Built and managed teams, budgets and timelines.
Caltech postdoctoral research
Quantified dissolution, precipitation, gas–water partitioning and fluid migration in aquifers to show how CO₂ strips and carries helium. This matters for both helium exploration and CO₂ storage.
Clumped isotopes + noble gas geochemistry
Founded a research group studying fundamental questions in H₂ systems. It works with industry (Koloma, HyTerra, ExxonMobil, Hestia Energy, Max Power), universities (Stanford, UT Austin, CU Boulder) and the Manitoba and Saskatchewan Geological Surveys.
Academic depth, field and industry experience.
California Institute of Technology · Presidential Fellow
Helium, hydrogen and CO₂ systems research. Lab method development for H₂ released from rocks, plus fluid and gas modeling in MATLAB and Python. Co-leads the Economic Geology seminar.
Bureau of Indian Affairs, Division of Energy & Mineral Development
Resource assessments for tribal nations: mapping, well logs, reservoir and production calculations, economics, team leadership and budgets.
Freeport-McMoRan Copper & Gold · Bagdad, AZ
Pit and exploration mapping, core and blast-hole logging, alteration and geotechnical sampling for ore control and pit stability.
MS, Geology, Colorado School of Mines (2018)
BS, Geological & Environmental Science, Stanford (2014)
Selected peer-reviewed work on subsurface gases.
Natural resources. A higher perspective.
Available for helium, hydrogen and CO₂ exploration studies, technical due diligence, sampling programs and resource assessments, including work with tribal nations and public agencies.
Start a conversation dhalford@caltech.edu Pasadena, California · Working across North America