Daniel Ibarra
Brown University, RI·Earth & Environmental Science
Rocks, lake sediments and cave deposits keep chemical records of how Earth's surface and water cycle have changed. They show when mountains rose, how rainfall shifted during abrupt climate swings, and how underground fluids moved through basins.
- Fields
Earth & Environmental Science
- Topics
paleoclimate
paleoclimatology
hydroclimate
- Grants
- 4 known grants, through Aug 2029
What they work on
- Reconstruct the tectonic and water history of Clayton Valley, Nevada, by constraining when crustal stretching, volcanism, sediment filling and fault activity occurred, to better identify where its lithium came from.
- Test whether faults act as conduits, barriers or long-lived pathways for lithium-bearing fluids, by building a basin-scale model that links fault evolution, basin development and fluid flow to lithium accumulation over time.
- Test whether southern Tibet already stood high before the India–Asia collision, using a triple oxygen isotope paleoaltimeter, which reads ancient elevation from three forms of oxygen, on three pre-collision fossil hydrothermal systems of Cretaceous to Paleogene age.
- Test whether the Tibetan Plateau changed from rugged to high and flat in the Neogene, by comparing triple oxygen isotopes from three post-collision hydrothermal sites with same-age basin sediments in central Tibet, correcting for evaporation and diagenesis.
- Expand cave monitoring in the Philippines into a multi-year, multi-cave network to track seasonal changes in surface and underground water in karst, the limestone terrain where caves form.
- Build high-resolution geochemical records from Philippine cave deposits spanning several Heinrich Events and compare them with climate model output, to test how Northern Hemisphere freshwater pulses altered rainfall over the Indo-Pacific Warm Pool.
- Map and date ancient shorelines of Silver Lake, California, using drone-based Structure-from-Motion photogrammetry, and pair them with dated sediment cores to reconstruct minimum lake depth and volume from 24,000 to 8,000 years ago.
- Estimate the climate conditions needed to fill and sustain Silver Lake using non-steady-state hydrologic models constrained by oxygen isotopes, and compare the results with climate forcings to identify drivers of past water change.
More about the research
These collaborative projects read those records mainly through isotopes, versions of the same element that differ slightly in mass. They pair the measurements with fieldwork and computer models. Together the projects cover four settings: ancient lakes in the Mojave Desert, caves in the Philippines, the rise of the Tibetan Plateau, and lithium-rich brines in Nevada. Each asks how geological and climatic processes shaped water and resources over thousands to millions of years.
Why it matters
The lithium work could help identify where economically viable lithium resources occur in Nevada and across the Basin and Range and similar regions, supporting U.S. supplies of a critical mineral. Reconstructing past swings in Mojave lake levels could inform California's understanding of how much water availability can vary, a key concern for its agricultural economy. Records from Philippine caves and Tibetan elevations could improve climate models and fill data gaps in the western tropical Pacific.
Known grants
From NIH and NSF research grants. Labs often have other funding we can't see.
Collaborative Research: GEO-CM: Tectonic Controls on Lithium Delivery and Enrichment in the Basin and Range
NSF · Sep 2026 – Aug 2029
Collaborative Research: Paleoaltimetry of the South-Central Tibetan Plateau Using Triple Oxygen Isotope Measurements
NSF · Sep 2026 – Aug 2029
Collaborative Research: RUI: Constraining Tropical Hydroclimate Responses to Periods of Abrupt Hydrological Changes Using Cave Deposits, Cave Monitoring, and Model Outputs
NSF · Sep 2025 – Aug 2028
Closest labs
Bronwen Konecky
Washington University in St Louis, MO·Earth & Environmental Science·Early-career
Reconstruct 10,000 years of Holocene rainfall and vegetation in Central America and northern South America by measuring hydrogen isotopes of leaf waxes in six dated lake cores from Guatemala and Venezuela.
Jean Lynch-Stieglitz
Georgia Institute of Technology, GA·Earth & Environmental Science
Test how changes in tropical winds alter thermocline depth across the Indo-Pacific by running sensitivity experiments in a high-resolution ocean model.
Anthony Chappaz
Central Michigan University, MI·Earth & Environmental Science
Track the newly recognized uranium form U(+V) and determine its role in uranium burial in low-oxygen marine sediments, using laboratory experiments on uranium phases relevant to the sea floor.
The school
Brown University: 23 labs on PI Pages, $375M a year on research, 251 research doctorates a year.
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