Publications

Publications

*denotes student/postdoc author

FORTHCOMING

In prep

*Hatton, K., Henkes, G.A., Sousa, F.J., Cox, S., Hemming, S., *Saslaw, M., Steponaitis, E., Ma, C., Present, T.M., Jaret, S.J., Ehm, L., Northrup, P., Tappero, R.V., Wooton, K.M., Rossie, J., Cote, S., Nengo, I., Feibel, C., Rasbury, E.T.,  A middle Miocene disconformity in the Lothidok Hills of the Turkana Basin, Kenya documented by U-Pb geochronology of dolomitized fossil wood.

Adeniyi, E.O., Shaw, C.A., Henkes, G.A., Hemingway, J.D., Myers, M.L., Hubbard, M.S., Bowen, D.W., Calavan, C.W., A thermochronological history of burial and exhumation from Kevin Dome, northwest Montana. 

Submitted

Cox, S., Sousa, F.J., Russo, G.A., *Hatton, K., Rasbury, E.T., Hemming, S., Steponaitis, E., Henkes, G.A., *Saslaw, M., Paired U/Pb and ⁴⁰Ar/³⁹Ar constraints on the Middle Miocene hominoid sites and the fossil forest at Napudet, Turkana, Kenya. Geological Society of America Bulletin.

In revision

*Holme, E.A., Henkes, G.A., Rasbury, E.T., Fralick, P.W., Hurowitz, J.A., New evidence from the Paleoproterozoic Gunflint Iron Formation for microbially-driven, early diagenetic precipitation of siderite. Earth and Planetary Sciences Letters. 

Accepted

Wostbrock, J.A.G., Witts, J.D., *Gao, Y., Peshek, C., Myers, C.E., Henkes, G.A., Sharp, Z.D., Reconstructing paleoenvironments of the Late Cretaceous Western Interior Seaway, USA, using paired triple oxygen and carbonate clumped isotope measurements. Geological Society of America Bulletin.

Henkes, G.A., *Place, P.F., Mak, J.E., Large, Negative Atmospheric Carbon Monoxide Clumped Isotope Values Result from Kinetic Isotope Fractionation, Tracing OH• Reactivity. AGU Advances.


PUBLISHED

14. *Saslaw, M., Yang, D., Lee, D., Poulsen, C. and Henkes, G.A., An isotope mass balance analysis of evaporative loss from Lake Turkana, Kenya using δ18O and δD of natural waters. Water Resources Research, Volume 60, e2023WR036076. https://doi.org/10.1029/2023WR036076 <PDF>

13. *Cohen, A.B., Christensen, L.N., Weber, F., Yagudaeva, M., Lo, E., Henkes, G.A., McCormick, M.L., Taylor, G.T., Preserved particulate organic carbon is likely derived from the subsurface sulfidic photic zone of the Proterozoic Ocean: evidence from a modern, oxygen-deficient lake. Geobiology, Volume 22, e12593. https://doi.org/10.1111/gbi.12593 <PDF>  

12. Henkes, G.A., 2023, Dental geochemistry reveals thermoregulation in the Neogene ocean’s most infamous superpredator (Commentary), Proceedings of the National Academy of Sciences of the United States of America, Volume 120, e2308015120. https://doi.org/10.1073/pnas.2308015120 <PDF> 

11. *Holme, E., Henkes, G.A., Tosca, N.J., Rasbury, T.E., *Young, J.M., Schaub D.R., Hurowitz, J.A., 2023, Experimental constraints on siderite clumped isotope thermometry. Geochimica et Cosmochimica Acta, Volume 343, 323-340. https://doi.org/10.1016/j.gca.2022.12.012 <PDF>

10. Gulbranson, E.L., Rasbury, E.T., Ludvigson, G.A., Moller, A., Henkes, G.A., Suarez, M.B., Northrup, P., Tappero, R., Maxson, J.A., Shapiro, R.S., Wooton, K.M., 2022, U–Pb geochronology and stable isotope geochemistry of terrestrial carbonates, Lower Cretaceous Cedar Mountain Formation, Utah: implications for synchronicity of terrestrial and marine carbon isotope excursions. Geosciences, Volume 12, 346. https://doi.org/10.3390/geosciences12090346. <PDF>

9. *Shipley, O., Manlick, P.J., Newton, A.L., Matich, P., Camhi, M., Cerrato, R.M., Frisk, M.G., Henkes, G.A., LaBelle, J.S., Nye, J.A., Walters, H., Newsome, S.D., Olin, J.A., 2022, Energetic consequences of resource use diversity in a marine carnivore. Oecologia, Volume 200, 65-78. https://doi.org/10.1007/s00442-022-05241-5. <PDF>

8. *Burtt, D.G., Henkes, G.A., Yancey, T.E., Schrag, D., 2022, Hot atmospheric formation of carbonate accretionary lapilli at the K-Pg boundary, Brazos River, Texas from clumped isotope thermometry. Geology.  https://doi.org/10.1130/G49674.1. <PDF>

National Geographic coverage

7. Sousa, F.J., Cox, S.E., Hemming, S.R., Rasbury, E.T., Steponaitis, E., Hatton, K., *Saslaw, M., Henkes, G., Princehouse, P., Vitek, N.S. and Nengo, I., 2022, New Discovery of Oligocene Strata in the Topernawi Formation, Turkana County, Kenya. Frontiers in Earth Science, Volume 19, Article 799097. https://doi.org/10.3389/feart.2022.799097. <PDF>

6. Rowan, J., Akwee, P.E., Feibel, C., Harmand, S., Henkes, G., Hildebrand, E., Lewis, J., Princehouse, P., Taylor, N., Nengo, I., 2021, Raising up African Paleoanthropologists: An Innovative Master's Programs at Turkana University College, Kenya. Evolutionary Anthropology. Volume 31, 2-4. https://doi.org/10.1002/evan.21933. <PDF>

5. *Shipley, O., Henkes, G.A., Gelsleichter, J., Morgan, C., Schneider, E.V., Talwar, B., Frisk, M.G., 2021, Shark tooth collagen stable isotope ratios (δ15N and δ13C) to study time-variant ecologies. Journal of Animal Ecology. Volume 90, Pages 2188-2201. https://doi.org/10.1111/1365-2656.13518. <PDF>

4. Hemingway, J.D., Henkes, G.A., 2021, A disordered kinetic model for clumped isotope bond reordering in carbonates. Earth and Planetary Science Letters. Volume 566, Page 116962. https://doi.org/10.1016/j.epsl.2021.116962. <PDF>

model code: https://pypi.org/project/isotopylog/

3. *Gao, Y., Henkes, G.A., Cochran, J.K., Landman, N.H., 2021, Temperatures of Late Cretaceous (Campanian) methane-derived authigenic carbonates from the Western Interior Seaway, South Dakota, USA, using clumped isotopes. Geological Society of America Bulletin, Volume 133, Pages 2524-2534. https://doi.org/10.1130/B35846.1. <PDF>

2. *Shipley, O., Newton, A., Frisk, M, Henkes, G.A., Walters, H., LaBelle, J., Hyatt, M., Olin, J., 2021, Telemetry validated nitrogen stable isotope clocks identify ocean-to-estuarine habitat shifts in mobile organisms. Methods in Ecology and Evolution, Volume 12, Pages 897-908. doi.org/10.1111/2041-210X.13567. <PDF>

1. Jimenez, M.Y., Ivany, L.C., Judd, E.J., Henkes, G.A., 2019, Low and seasonally variable salinity in the Pennsylvanian equatorial Appalachian Basin. Earth and Planetary Science Letters, Volume 519, Pages 182-191. doi.org/10.1016/j.epsl.2019.04.051. <PDF>


Conference Abstracts

*denotes SBU student author

27. (poster) Tesauro, J., Ledbetter Ferrill, N., Hilbert, A., Saxby, J., Li, X., Wooton, K., Henkes, G., Rasbury, E. T., Luczaj, J., Lehrmann, D., 2022, Environments and timing of dolomitization and carbonate diagenesis in the Triassic Yangtze Platform in the Nanpanjiang Basin, south China. GSA Annual Meeting, Oct. 2022, Denver, CO, USA.

26. (poster) Saxby, J., Hilbert, A., Tesauro, J., Ledbetter Ferrill, N., Mobasher, N., Li, X., Rasbury, E., T., Henkes, G., Lehrmann, D., and Luczaj, J., 2022, Analysis of carbonate diagenesis on the Great Bank of Guizhou (south China) using geochemical, geothermometric, and geochronological techniques. GSA Annual Meeting, Oct. 2022, Denver, CO, USA. 

25. (poster) Ledbetter Ferrill, N., Tesauro, J., Hilbert, A., Saxby, J., Li, X., Wooton, K., Rasbury, E. T., Henkes, G., Luczaj, J., and Lehrmann, D., Mechanisms for dolomitization of the Triassic Yangtze Platform in the Nanpanjiang Basin, south China. GSA Annual Meeting, Oct. 2022, Denver, CO, USA. 

24. (poster) Hilbert, A., Saxby, J., Tesauro, J., Ledbetter Ferrill, N., Li, X., Rasbury, E., T., Henkey, G., Wooton, K., Lehrmann, D., and Luczaj, J., 2022, Mechanisms of dolomitization of the Lower Triassic Anshun Formation of the Yangtze Platform: a case for regional high temperature dolomitization in the Nanpanjiang Basin, south China. GSA Annual Meeting, Oct. 2022, Denver, CO, USA.

23. (poster) *Hatton, K., Rasbury, T., Hemming, S., Benson, T., Henkes, G.A., Wooton, K.M., Emproto, C., Stillings, L., Liu, T., Sontarp, E., Geochemical Constraints on Li-rich Authigenic Mineralization of Lacustrine Deposits in the McDermitt Caldera. GSA Annual Meeting, Oct. 2022, Denver, CO, USA.

22. (talk) *Saslaw, M., Liutkus-Pierce, C., Stinchcomb, G., Shedroff, S., Uno, K., Tweedy, R., Beck, C., Feibel, C.S., Miller, E., Henkes, G.A., Soil carbonate clumped isotope temperatures and paleoenvironmental interpretations from the Miocene of the Turkana Basin, East Africa. GSA Annual Meeting, Oct. 2022, Denver, CO, USA.

21. (poster) Stinchcomb, G., Liutkus-Pierce, C., Beck, C., *Saslaw, M., Shedroff, S., Minya, A., Winget, M., Tweedy, R., Rowan, C.M., Mana, S., Feibel, C.S., Henkes, G.A., Uno, K.T., Early Miocene climate and landscape change inferred from paleosols at Loperot, West Turkana, Kenya. GSA Annual Meeting, Oct. 2022, Denver, CO, USA.

20. (talk) Henkes, G.A., *Burtt, D.G., Rasbury, T., Luczaj, J., Freiburg, J.T., Temperatures and timescales of dolomitization of Ordovician carbonates along the Wisconsin Arch from paired clumped isotope thermometry and U-Pb geochronology. AGU Fall Meeting, Dec. 2021, New Orleans, LA, USA.

19. (talk) *Gao, Y., Henkes, G.A., Cochran, J.K., Landman, N.H., Evaluating aragonite fossil shell clumped isotopes as a paleotemperature recorder of the Late Cretaceous Western Interior Seaway. AGU Fall Meeting, Dec. 2021, New Orleans, LA, USA.

18. (talk) *Saslaw, M., Henkes, G.A., Beck, C.C., Liutkus-Pierce, C., Feibel, C.S., Rowan, C.M., and Boyd, M., Middle and Late Miocene paleoclimates from clumped isotopes of soil carbonates, Turkana Basin, East Africa. AGU Fall Meeting, Dec. 2021, New Orleans, LA, USA.

17. (talk) *Burtt, D.G., Henkes, G.A., Walton, E.L., and Drake, H., Experimental and empirical evidence for carbonate clumped isotopologue disequilibrium driven by meteorite impact-related decarbonation. AGU Fall Meeting, Dec. 2021, New Orleans, LA, USA.

16. Wostbrock, J.A.G., Witts, J.D., *Gao, Y., Myers C., Henkes, G.A., Sharp, Z., Combined triple oxygen and clumped isotope measurements to reconstruct paleoenvironments of the Late Cretaceous Western Interior Seaway. Geological Society of America Annual Meeting, Oct. 2021, Portland, OR, USA.

15. (virtual poster) *Gao, Y., Price, R.E., Lott, C., Henkes, G.A., Clumped isotope geochemistry of carbonate formed in association with shallow water continental methane seeps at Prony Bay, New Caledonia and Elba, Italy. AGU Fall Meeting, Dec. 2020, virtual due to COVID-19 pandemic.

14. (virtual poster) *Hatton, K., Rasbury, T., Henkes, G.A., *Saslaw, M., Wooton, K., Sousa, F., Cox, S., Steponaitis, E., Hemming, S.R., Cote, S., Northrup, P., Nengo, I., Present, T., Princehouse, P., Rossie, J.B., Tappero, R., U-Pb dating of Oligocene-Miocene petrified wood carbonates from the Turkana Basin, Kenya. AGU Fall Meeting, Dec. 2020, virtual due to COVID-19 pandemic.

13. (virtual poster) *Burtt, D.G., Henkes, G.A., Walton, E.L., The effects of carbonate decomposition on clumped isotopes from heavily altered limestone clasts in the Steen River Impact Structure breccia. AGU Fall Meeting, Dec. 2020, virtual due to COVID-19 pandemic.

12. (virtual poster) Henkes, G.A., *Saslaw, M., Feibel, C.S., Persistent warmth in the Turkana Basin, Kenya, from the Late Miocene until present day. AGU Fall Meeting, Dec. 2020, virtual due to COVID-19 pandemic.

11. (virtual poster) Henkes, G.A., Mak, J.E., A large, negative clumped isotope ratio obsevred in atmospheric carbon monoxide. AGU Fall Meeting, Dec. 2020, virtual due to COVID-19 pandemic.

10. (talk) *Holme, E.A., Henkes, G.A., Rasbury, E.T., Fralick, P., Tosca, N.J., & Hurowitz, J.A., Clumped isotope geochemistry of Fe-carbonates from the Gunflint Formation. Goldschmidt Conference, Jun. 2020, virtual due to COVID-19 pandemic.

9. (poster) *Young, J.M., G.A. Henkes and Glotch, T.D., Tracing the aqueous alteration of carbonaceous chondrites via carbonate clumped isotopes and raman carbon thermometry. Lunar and Planetary Science Conference, Mar. 2020, cancelled due to COVID-19 pandemic.

8. (poster) *Gao, Y., Henkes, G. A., Cochran, J. K., & Landman, N. H., Clumped isotope paleothermometry of authigenic carbonates from late Cretaceous (Campanian) methane seeps in the Western Interior Seaway, South Dakota, USA. GSA Annual Meeting, Sept. 2019, Phoenix, AZ, USA.

7.  (poster) *Holme, E.A., Henkes, G.A., Hurowitz, J.A., Rasbury, E.T., & Fralick, P., New isotopic perspectives on carbonate geochemistry from the Gunflint Iron Formation. 2nd Geobiology Society Conference, Jun. 2019, Banff, Canada.

6. (talk) Henkes, G.A., The state of proxy consensus for Paleozoic sea surface temperatures. 2nd Geobiology Society Conference, Jun. 2019, Banff, Canada.

5. (poster) *Burtt, D.G., & Henkes, G.A., Clumped isotope geochemistry of East African Rift carbonatites. AGU Fall Meeting, Dec. 2018, Washington, DC, USA.

4. (poster) *Gao, Y., Henkes, G.A., Cochran, J.K., & Landman, N.H., The paleoenvironments of Late Cretaceous methane seeps in the Western Interior Seaway (SD, USA) from carbonate stable isotopes. AGU Fall Meeting, Dec. 2018, Washington, DC, USA.

3. (poster) Henkes, G.A., *Moreira, M.C., *Yang, D., & Thomas, E., A modern isotope hydrology of the Turkana Basin. AGU Fall Meeting, Dec. 2018, Washington, DC, USA.

2. (talk) Ivany, L.C., Jimenez, M.Y., Henkes, G.A., Depleted and seasonal precipitation in the Pennsylvanian interglacial tropics inferred from serial oxygen isotope values of mollusk aragonite. GSA Annual Meeting, Nov. 2018, Indianapolis, IN, USA.

1. (poster) Cochran, J.K., Landman, N.H., *Gao, Y., Henkes, G.A., Strontium, carbon and oxygen isotopes in well-preserved ammonite shells and authigenic carbonates in cold methane seep deposits from the Late Cretaceous Western Interior Seaway of North America: Clues to seep paleoenvironment. GSA Annual Meeting, Nov. 2018, Indianapolis, IN, USA.

Funding

We would also like to acknowledge the following sources of funding for supporting this work: