Ahm, A-S. C., Bjerrum, C.J., Hoffman, P.F., Macdonald, F.A., Maloof, A.C.,
Rose, C.V., Strauss, J.V., Higgins, J.A. The Ca and Mg isotope record of the
Cryogenian Trezona carbon isotope excursion.
Earth and Planetary Science Letters V568, 117002, 2021.
https://doi.org/10.1016/j.epsl.2021.117002
(download pdf)
Nelson, L. L., Ahm, A-S. C., Macdonald, F. A., Higgins, J. A., Smith, E. F.,
Fingerprinting local controls on the Neoproterozoic carbon cycle with the isotopic
record of Cryogenian carbonates in the Panamint Range, California. Earth and
Planetary Science Letters, 566, 116956, 2021.
doi.org/10.1016/j.epsl.2021.116956
(download pdf)
Crockford, P.W, Kunzmann, M., Blättler, C.B., Boriana K-A., Murphy, J.G.,
Ahm, A-S. C., Sharoni, S., Halverson, G.P., Planavsky, N.J., Halvey, I., Higgins, J.A.
Reconstricting Neoproterozoic seawater chemistry from early diagenetic dolomite.
Geology, v. 49, 2020,
doi.org/10.1130/G48213.1
(download pdf)
Bold, U., Ahm, A-S. C., Schrag, D. P., Higgins, J. A., Jamsran, E., Macdonald,
F. A., Effect of dolomitization on isotopic records in Neoproterozoic carbonates
of southwestern Mongolia. Precambrian Geology, 350, 2020,
doi.org/10.1016/j.precamres.2020.105902
(download pdf)
Jones, D. S., Brothers, W. R., Ahm, A-S. C., Slater, N., Higgins, J. A.,
Fike, D. A., Sea level, carbonate mineralogy, and early diagenesis controlled
δ13C records in Upper Ordovician carbonates, Geology, 48, 194-199, 2020,
doi.org/10.1130/G46861.1
(download pdf)
Crockford, P. W., Wing, B. A., Paytan, A., Hayles, J. A., Middleton, J.,
Torres, M., Ahm, A-S. C., Caxito, F., Uhlein, G., Halverson, G. P., Horner,
T. J., Barium-isotopic constraints on the origin of post-Marinoan barites,
Earth and Planetary Science Letters, 519, 234-244, 2019,
doi.org/10.1016/j.epsl.2019.05.018
(download pdf)
Ahm, A-S. C., Maloof, A. C., Macdonald, F. A., Hoffman, P. F., Bjerrum C. J.,
Bold, U., Rose, C. V., Strauss, J. V., Higgins, J. A., An early diagenetic
deglacial origin for basal Ediacaran cap dolostones, Earth and Planetary
Science Letters, 506C, 292-307, 2019,
doi.org/10.1016/j.epsl.2018.10.046
(download pdf)
Ahm, A-S. C., Bjerrum, C. J., Blättler, C. L., Swart, P. K., Higgins, J. A.,
Quantifying early marine diagenesis in shallow water carbonate sediments,
Geochimica et Cosmochimica Acta, 236, 140-159, 2018,
doi.org/10.1016/j.gca.2018.02.042
(download pdf)
Higgins, J. A., Blättler, C. L., Lundstrom, E. A., Santiago-Ramos, D. P.,
Akhtar, A. A., Ahm, A-S. C., Bialik, O., Holmden, C., Bradbury, H.,
Murray, S. T., Swart, P. K., Mineralogy, early marine diagenesis, and the
chemistry of shallow-water carbonate sediments, Geochimica et Cosmochimica
Acta, 220, 512-534, 2018,
doi.org/10.1016/j.gca.2017.09.046
(download pdf)
Ahm, A-S. C., Bjerrum C. J., Hammarlund, E. U., Disentangling the record
of diagenesis, local redox conditions, and global seawater chemistry during
the latest Ordovician glaciation, Earth and Planetary Science Letters, 459,
145-156, 2017,
doi.org/10.1016/j.epsl.2016.09.049
(download pdf)
Manuscripts in review/pre-prints
Ahm, A-S. C., Husson, J.M., Local and global controls on carbon isotope
chemostratigraphy. Submitted to Cambridge Elements.
Preprint available on www.eartharxiv.org
doi.org/10.31223/X5V607
(download preprint)
Farrell, U.C., ... Ahm, A-S. C., ...Sperling, E.A., The Sedimentary
Geochemistry and Paleoenvironments Project. Submitted to Geobiology.
Akhtar, A. A., Ahm, A-S. C., Higgins, J. A., Mixed marine and
meteoric early diagenetic alteration of shallow water carbonate sediments:
insights from paired δ44/40Ca and δ26Mg values.
Manuscript in preparation.
Busch, J.F., Hodgin, E.B., Ahm, A-S. C., Husson, J.M., Macdonald,
F.A., Bergmann, K.D., Higgins, J.A., Strauss, J.V. Ediacaran Shuram carbon
isotope excursion as a global oceanographic event.
Manuscript in preparation.