• 298 Citations
  • 7 h-Index
20052021
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Personal profile

Research interests

I am an Earth Scientist with expertise in geochemistry, sedimentary geology and (palaeo)oceanography, as well as a background in soil science. In order to advance our understanding of the causes and consequences of environmental change, my research focusses on extracting records of palaeoenvironmental/climatic change from marine sedimentary rocks, and understanding the role of secondary (clay and metal oxide) mineral formation and dissolution on the cycling of elements in terrestrial and marine settings. I utilise a combination of fieldwork, analytical (esp. microbeam), experimental and modelling approaches to extract, validate, and interpret this information, often working with a diverse group of local and international collaborators.

Current research interests include:

  1. high resolution palaeorecords across time-periods of significant environmental change (Quaternary glacial-interglacial cycles, Eocene-Oligocene Climate Transition, Mesozoic Greenhouse World and Ocean Anoxic Events, Ediacaran-Cambrian Transition);
  2. secondary mineral formation and alteration in terrestrial and marine settings – implications for climate, element cycling and the interpretation of isotope proxy records;
  3. wildfires as agents of mineral alteration and geochemical differentiation at the Earth’s surface;
  4. development of novel applications combining high resolution, quantitative electron-based sedimentary petrography with microbeam geochemical and isotopic analysis to inform studies of palaeoenvironmental change.

 

Papers under review:

Xu H, Hou D, Löhr SC, Liu Q, SC George. Early diagenetic pyrite cementation influences molecular composition of sedimentary organic matter in the Dongying Depression, China. Chemical Geology. Submitted November 2019

Löhr SC, Whittaker J, Mundana R, Carey R, Mabee A, N Daczko. Tasman Gateway at ~2 km water depth 7 Myr prior to Eocene-Oligocene climate transition. Nature Communications. Original submission August 2019, revisions invited October 2019.

Frank AB, Klaebe RM, Löhr SC, Xu L and R Frei. Chromium isotope composition of organic-rich marine sediments and their mineral phases: implications for the black shale paleoredox archive. Geochimica Et Cosmochimica Acta. Original submission May 2019, revised submission November 2019.

Research student supervision

PhD students supervised (* denotes primary supervision):

*Commencing Nov 2019: Shujun Han - 'Diagnostic criteria for identifying alkaline lake deposits and  implications for the earliest record of animal life in the Ediacaran Doushantuo Formation'

Commencing Nov 2019: Hafiz Shahid Hussain

*Current: Mehrnoush Rafiei – 'Novel sedimentary petrography applied to the shale record of continental weathering in the Precambrian'

Current: Kristy Guerin (PhD) –  ‘Wildfires as an agent of high temperature geochemical and mineralogical differentiation at the Earth’s surface’ – with Drs David Murphy & Luke Nothdurft (QUT)

Current: Bronwyn Campbell (PhD) – ‘Geochemical changes during coal biodegradation to methane’ – with Professor Simon George

2016 – 2019: Huiyuan Xu – ‘Source rock development and organic matter inputs in the Dongying Depression of the Bohai Bay Basin’

2013 – 2018: Md Habibur Rahman – ‘Clay mineral catalytic influence on hydrocarbon generation in black shales’

MRes & BSc (Hons) students supervised (* denotes primary supervision):

*Current: Kaycee Handley - 'Massive subaerial volcanism trigger for Oceanic Anoxic Event 2' - joint supervision with Dr April Abbott

2018: Angela Mabee – ‘Eocene deepening of the Tasman Gateway & commencement of the Antarctic Circumpolar Current’

2015: Natalie Debenham – ‘An exotic source rock: drivers of organic carbon enrichment in the Permian Arckaringa Basin’

*2013: Robyn Williamson (BSc Hons, University of Adelaide) – ‘Organic carbon in Mediterranean sapropels: The interplay between anoxia, productivity and clay mineral association’

2012: Samuel Fraser (BSc Hons, University of Adelaide) – 'Nanoscale imaging of the Woodford Shale, Oklahoma, USA: Organic matter preservation as clay-organic nanocomposites'

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Projects 2015 2021

Research Outputs 2005 2019

Are clay minerals the primary control on the oceanic rare earth element budget?

Abbott, A. & Löhr, S., 2019, In : Geophysical Research Abstracts. 21, 1 p., EGU2019-11339.

Research output: Contribution to journalMeeting abstractResearch

Open Access
File

Are clay minerals the primary control on the oceanic rare earth element budget?

Abbott, A. N. & Löhr, S., 2019, In : Goldschmidt Abstracts. 2019, 1 p., 2.

Research output: Contribution to journalMeeting abstractResearch

Open Access

Are clay minerals the primary control on the oceanic rare earth element budget?

Abbott, A. N., Löhr, S. & Trethewy, M., Aug 2019, In : Frontiers in Marine Science. 6, 19 p., 504.

Research output: Contribution to journalArticleResearchpeer-review

Open Access
File
rare earth elements
clay minerals
Clay minerals
Rare earth elements
clay mineral

Combining finite strain analysis and illite crystallinity to examine strain variation in a shale detachment zone

Hansberry, R. L., Collins, A. S., King, R. C., Morley, C. K. & Löhr, S. C., 1 May 2019, In : Journal of Asian Earth Sciences. 174, p. 283-293 11 p.

Research output: Contribution to journalArticleResearchpeer-review

strain analysis
crystallinity
illite
shale
strain partitioning

ODP Site 1172 record indicates Tasman Gateway at bathyal depths >7 m.y. prior to onset of Antarctica Circumpolar Current and Antarctic Glaciation

Löhr, S., Mabee, A., Daczko, N. & Whittaker, J., 2019, ICP13 abstract book. 1 p.

Research output: Chapter in Book/Report/Conference proceedingConference abstractResearch

Activities 2015 2019

  • 8 Publication Peer-review
  • 4 Participating in a conference, workshop, ...
  • 4 Membership of committee
  • 1 Organising a conference, workshop, ...

Geochimica et Cosmochimica Acta (Journal)

Stefan Loehr (Reviewer)
2019 → …

Activity: Publication peer-review and editorial workPublication Peer-review

European Geosciences Union General Assembly 2019

Stefan Loehr (Participant)
2019

Activity: Participating in or organising an eventParticipating in a conference, workshop, ...

Department of Earth and Planetary Sciences (Organisational unit)

Stefan Loehr (Member)
2019 → …

Activity: MembershipMembership of committee

Goldschmidt

April Abbott (Participant), Stefan Löhr (Participant)
Aug 2019

Activity: Participating in or organising an eventParticipating in a conference, workshop, ...

Carbon Down Under - Sydney DCO Workshop

Stefan Loehr (Participant)
24 Jul 201926 Jul 2019

Activity: Participating in or organising an eventParticipating in a conference, workshop, ...