PreCAmbrian Processes Lab


We are the Precambrian Processes Lab at the University of Minnesota Duluth. The lab is run by Dr. Latisha Brengman – a cross-disciplinary geoscientist studying Precambrian sedimentary and hydrothermal systems using an integrated sedimentological and geochemical approach.

You can learn more about our group projects under the “Projects” page. We are actively recruiting graduate and undergraduate students and always looking forward to new collaborations. Please reach out to lbrengma@d.umn.edu for more information or to connect!

PUBLICATIONS *student authors


Brengman, L.A., Fedo, C. M., Whitehouse, M. J., Banerjee, N. R., & Jabeen, I. (2020). Constraining mechanisms of quartz precipitation during silicification and chemical sedimentation in the in the ~2.7 Ga Abitibi Greenstone Belt, Canada. Precambrian Research, accepted manuscript, in revision.

A pre-print version of the manuscript can be downloaded here: https://doi.org/10.31223/osf.io/xk4av.

Brengman, L. A., & Fedo, C. M. (2018). Development of a mixed seawater-hydrothermal fluid geochemical signature during alteration of volcanic rocks in the Archean (∼2.7 Ga) Abitibi Greenstone Belt, Canada. Geochimica et Cosmochimica Acta, 227, 227-245. doi: 10.1016/j.gca.2018.02.019

Stewart, E. K., *Rasmussen, J., Skalbeck, J., Brengman, L. A., & Gotkowitz, M. (2018). Mapping the base of the Cambrian aquifer through geophysical modeling of Precambrian topography, southern Wisconsin. Wisconsin Geological and Natural History Survey Project Completion Report, 15 p.

Brengman L. A., Heins W.A., & Matthews J.A. (2016). Dissolution and Transformation of Provenance Lithotypes during Initial Sediment Generation with Application to Play-Element Prediction. ExxonMobil Upstream Research Company Research Application Report URC.2016.046, 136 p.

Brengman, L.A., Fedo, C. M., & Whitehouse, M. J. (2016). Micro‐scale silicon isotope heterogeneity observed in hydrothermal quartz precipitates from the >3.7 Ga Isua Greenstone Belt, SW Greenland. Terra Nova, 28.1, 70-75. doi: https://doi.org/10.1111/ter.12192

In review

Eyster, A., Brengman, L.A., Nichols, C., Levitt, Z., & Bergmann, K. (in review). A new depositional framework for massive iron formations after the Great Oxidation Event. Manuscript inreviewin Geochemistry, Geophysics, and Geosystems (G3).

Stewart, E., & Brengman, L.A. (in review). Sedimentology, stratigraphy, and provenance of the Baraboo quartzite. Manuscript inreviewin the Journal of Geology.


GRANT-IN-AID OF RESEARCH, ARTISTRY, & SCHOLARSHIP, Shared instrument category, “Acquisition of a hand-held x-ray fluorescence instrument.” University of Minnesota, Office of the Vice President for Research. Awarded, November 2019. $35,496. Brengman, L. A. (PI), Swenson, J., (Co-I). Matching funds (50%) were secured separately through a Collegiate Fee proposal.

COLLEGIATE FEE PROPOSAL, “Acquisition of a hand-held x-ray fluorescence instrument for integrated teaching and research in the Earth and Environmental Sciences at UMD.” University of Minnesota Duluth. Awarded, July 2019 – June 2020. $29,042. Brengman, L. A. (PI).

GRANT-IN-AID OF RESEARCH, ARTISTRY, AND SCHOLARSHIP, “Application of a newly developed silicon isotope proxy to sulfide mineral deposit exploration”. University of Minnesota, Office of the Vice President for Research. Awarded, July 2018 – October, 2020. $27,107. Brengman, L. A. (PI).

CHANCELLOR’S SMALL GRANT, “Involving UMD students from across campus to update the museum-quality display cases in Heller Hall and connect to a modern audience.” Awarded, May 8, 2019. $2,999.40. Brengman, L. A. (PI).


Chancellor’s small grant, “Involving UMD students from across campus to update the museum-quality display cases in Heller Hall and connect to a modern audience.” Awarded, May 8, 2019. $2,999.40. Brengman, L. A. (PI).

Participant, Letters to a Pre-Scientist, Science Communication and Representation (https://www.prescientist.org/). (September 2019 – present).

Community Ambassador for EarthArXiv (https://eartharxiv.org/). (2017 – present).

Women in Geology Career Pathways Program Mentor, Geological Society of America (GSA). (September 21 – 25, 2019).

Resume Mentor, Geological Society of America (GSA). (September 21- 25, 2019).

Faculty Advisor, Earth Science Club. (August 2019 – present).

Member, Search committee for new Staff hire in Earth & Environmental Sciences. (August 2019 – December 2019).

Women in Geology Career Pathways Program Mentor, Geological Society of America (GSA). (November 4 – 6, 2018).

Resume Mentor, Geological Society of America (GSA). (Nov.4 – 6, 2018).

Outstanding Student Presentation Award (OSPA) Poster Judge, American Geophysical Union. (December 10, 2018 – December 14, 2018).

Member, Lakehead University International opportunity exploration committee. (November 15, 2018 – November 16, 2018). I was a part of a 2-day international envoy to Lakehead University in Thunder Bay, Ontario. The goal was to explore institutional collaborative potential between UMD and Lakehead.

Member, Science and Engineering Day Committee, Swenson College of Science & Engineering (May 26, 2016 – 2018).

Member, Search committee for new Faculty hire in Chemical Engineering. (Jan. 2018 – May 2018).

Member, SciArt Committee in Earth & Environmental Sciences. (August 2018 – Present). The SciArt (Science and Art) Committee is tasked with renovating the display cases, installing geologic, educational floor maps, and updating outward facing educational content displayed within Heller Hall.

Member, Curriculum Committee for Department of Earth and Environmental Sciences. (September 2016 – Present). The Curriculum Committee completely revised both majors and minors in the department (1: Geology, 2: Environmental Sciences) to allow all students in the program to begin a core sequence together to facilitate interdisciplinary action and foster community within the program.

Volunteer, Math Prep for STEM Careers summer course field trip outreach events. (2018, 2019). I participated in and formulated activities for the STEM incoming freshman camp.

Coordinator, Middle school class visit and field trips. (2018, 2019). I helped facilitate, organize, and coordinate group field trips from led by graduate students.

Member, Lake Superior Youth Symposium planning committee. (June 2018 – October 2018).

Volunteer at STARBASE, Hermantown, MN. (October 5, 2018). “STARBASE is a non-profit … educational program that provides free, hands-on, immersive curriculum in STEM (Science, Technology, Engineering, and Math) to local 5th graders.” Link to STARBASE website: http://www.starbasemn.org/starbase-duluth/

Institute of Lake Superior Geology (ILSG) student poster judge. (May, 2018).

Coordinator, organizer, member, and facilitator, Community Outreach for Department of Earth and Environmental Sciences (November 2016 – 2018). I helped to develop outreach kits and activities for the UMD K-12 local outreach program to five Duluth area schools. The program initiated by Charity Rupp reached >500 students for 26 days out of the year (2-3 times a day, for a total of 156 student/ faculty volunteer slots for 52-78 events). With the help of the outreach office and graduate student Maggie Upton, we created 3 deployable outreach kits for 4th and 5th grade students. Each kit contains: (1) a formal lesson plan, complete with instructions and worksheets for both students and student volunteers / primary instructors, and (2) all materials necessary for the 45-minute, or 90-minute activities. At present, all activities align with Minnesota State Standards for “Rocks and Minerals I and II”, and “Landforms”, and we have built in the possibility for yearly extension or expansion packs to highlight novel regional and global research from our department.

Department tour guide for Donors (periodic since 2015).

Presenter, Graduate student breakfast “speed research” talk (October 21, 2015). “The growth of the continents, the rise of oxygen, and the birth of the biosphere – what one extinct rock can tell us about early Earth.”

Reviewer, Undergraduate Research Opportunities Program (UROP) at UMD (2015, 2017).

Science Day coordinator, University of Minnesota Duluth, MN; Helped to organize Science and Engineering Day activities for local K-12 students. (2015 – 2017).


Assistant Professor, Department of Earth and Environmental Sciences, University of Minnesota Duluth, MN (2015- present).

Research Associate, Wisconsin Geological and Natural History Survey; Collaborator: E. Stewart; Projects: Preliminary textural and geochemical characterization of the <1.71 Ga Freedom Formation, Baraboo, WI; and bedrock mapping of the Baraboo quartzite, Seeley Slate, and Freedom Formation (2019 – present).

Internship, Exxon Mobil Research Company, Houston, TX, Non-conventional reservoir group. Collaborator, Mentor: W. Heins. Project: Predicting the character and grain size distribution of material produced during chemical weathering of a known provenance. (May – August 2015).

Lecturer, Research Associate, and Teaching Assistant, Department of Earth and Planetary Sciences, University of Tennessee, Knoxville (2010 – 2015).


Ph.D. (2015), University of Tennessee, Knoxville; major field: Earth and Planetary Sciences; Advisor: Dr. C. M. Fedo; Dissertation: Geochemical and isotopic characteristics of Precambrian primary and secondary chert. Degree conferred 8 May 2015.

B.A. (2009), Northwestern University; major field: Geology, with honors; Advisor Dr. M. T. Hurtgen; Honors Senior Thesis: The sulfur isotope composition of 800 Ma Neoproterozoic seawater as recorded in the Bitter Springs Formation, Australia; Degree conferred 15 June 2009.