• 344 Citations
  • 8 h-Index
20052021

Research output per year

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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, geochronology 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. Organic Geochemistry. 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.

Research student supervision

PhD students supervised (* denotes primary supervision):

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

Current: Hafiz Shahid Hussain (with April Abbott) - PETM in a new basinal transect of Pakistan

*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

Research Outputs

Chromium isotope composition of organic-rich marine sediments and their mineral phases and implications for using black shales as a paleoredox archive

Frank, A. B., Klaebe, R. M., Löhr, S., Xu, L. & Frei, R., 1 Feb 2020, In : Geochimica et Cosmochimica Acta. 270, p. 338-359 22 p.

Research output: Contribution to journalArticle

  • 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 abstract

    Open Access
    File
    Open Access
    File
  • 2 Citations (Scopus)
    16 Downloads (Pure)

    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 abstract

    Open Access

    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 journalArticle

  • Activities

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

    GSA Bulletin (Journal)

    Stefan Loehr (Reviewer)
    2019 → …

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

    Goldschmidt

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

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

    Geochimica et Cosmochimica Acta (Journal)

    Stefan Loehr (Reviewer)
    2019 → …

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

    Marine and Petroleum Geology (Journal)

    Stefan Loehr (Reviewer)
    2019

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