Alissa Kotowski

Alissa Kotowski
Utrecht University | UU · Department of Earth Sciences

Ph.D.

About

21
Publications
5,981
Reads
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192
Citations
Introduction
I'm an Assistant Professor at Utrecht University in the Netherlands studying the strength and deformation mechanisms of strain-accommodating minerals at plate boundaries. I combine field (structural geology) and laboratory work (microstructures, petrology, geochron, nano-indentation experiments) to investigate the mechanics of the subduction interface. I'm interested in metamorphic and rheological controls on transient deformation, like Episodic Tremor and Slow Slip, and subduction initiation.
Additional affiliations
February 2020 - September 2020
McGill University
Position
  • PostDoc Position
Description
  • Structural geology and experimental rock mechanics
August 2014 - December 2019
University of Texas at Austin
Position
  • Fellow
Description
  • Structural geology, metamorphic petrology, tectonics, and geochronology
Education
August 2014 - December 2019
University of Texas at Austin
Field of study
  • Geology
August 2010 - May 2014
Boston College
Field of study
  • Geological Sciences

Publications

Publications (21)
Article
Full-text available
Exhumed high‐pressure/low‐temperature (HP/LT) metamorphic rocks provide insights into deep (∼20–70 km) subduction interface dynamics. On Syros Island (Cyclades, Greece), the Cycladic Blueschist Unit preserves blueschist‐to‐eclogite facies oceanic‐ and continental‐affinity rocks that record the structural and thermal evolution linked to Eocene subdu...
Article
Full-text available
This paper provides an overview of research on core from Oman Drilling Project Hole BT1B and the surrounding area, plus new data and calculations, constraining processes in the Tethyan subduction zone beneath the Samail ophiolite. The area is underlain by gently dipping, broadly folded layers of allochthonous Hawasina pelagic sediments, the metamor...
Article
Full-text available
Subduction interface thermal structure changes drastically within the first few million years of underthrusting (i.e., subduction infancy). Metamorphic soles beneath ophiolites record snapshots of dynamic conditions and mechanical coupling during subduction infancy. Beneath the Samail Ophiolite (Oman), the sole comprises structurally higher high‐te...
Article
Full-text available
Retrograde metamorphic rocks provide key insights into the pressure-temperature (P-T) evolution of ex-humed material, and resultant P-T constraints have direct implications for the mechanical and thermal conditions of subduction interfaces. However, constraining P-T conditions of retrograde metamorphic rocks has historically been challenging and ha...
Article
Full-text available
Hole BT1B of the Oman Drilling Project provides a continuous sampling from listvenite into the metamorphic sole that preserves the deformation, hydration, and carbonation processes of oceanic mantle peridotite at the base of the Samail ophiolite, Oman. We present evidence of multistage brittle deformation in listvenites and serpentinites based on f...
Preprint
Full-text available
Exhumed high-pressure/low-temperature (HP/LT) metamorphic rocks provide insights into deep (~20-70 km) subduction interface dynamics. On Syros Island (Cyclades, Greece), the Cycladic Blueschist Unit (CBU) preserves blueschist-to-eclogite facies oceanic- and continental-affinity rocks that record the structural and thermal evolution associated with...
Preprint
Full-text available
We combine elastic thermobarometry with oxygen isotope thermometry to quantify the pressure-temperature (P-T) evolution of retrograde metamorphic rocks of the Cycladic Blueschist Unit (CBU), an exhumed subduction complex exposed on Syros, Greece. We employ quartz-in-garnet and quartz-in-epidote barometry to constrain pressures of garnet and epidote...
Preprint
Full-text available
Hole BT1B of the Oman Drilling Project provides a continuous sampling from listvenite into the metamorphic sole that preserves the deformation, hydration and carbonation processes of oceanic mantle peridotite at the base of the Samail ophiolite, Oman. We present evidence of multistage brittle deformation in listvenites and serpentinites based on fi...
Conference Paper
Out-of-school time high school programs have successfully increased the number of minoritized students pursuing STEM college majors, yet Geoscience remains the least ethnically and racially diverse STEM discipline. Traditional teaching methods--including lectures, quizzes and tests--typically embody Individualistic traits, even though Collectivist...
Article
Full-text available
We use structural and microstructural observations from exhumed subduction-related rocks exposed on Syros Island (Cyclades, Greece) to provide constraints on the length scales and types of heterogeneities that occupy the deep subduction interface, with possible implications for episodic tremor and slow slip. We selected three Syros localities that...
Conference Paper
High-pressure/low-temperature (HP/LT) metamorphic rocks may be exhumed via forced return flow in a heterogeneous melange and/or coherent underplating and unroofing, depending on factors such as rock rheology and temperature. These end-member models lead to a chaotic mixture or a characteristic trend, respectively, in regional and outcrop-scale stru...
Article
Full-text available
We present observations from an exhumed subduction complex that resembles the environment of modern deep episodic tremor and slow slip (ETS). We focus on the Cycladic Blueschist Unit on Syros Island in Greece. Syros metabasites consist of blueschists and eclogites that record prograde deformation, with peak metamorphism of 1200–1600 MPa and 450–550...
Conference Paper
We investigate the rheological properties of a deep subduction interface using exhumed metabasites exposed at Kini beach on Syros Island, Greece. Syros rocks were subducted to ~60 km in the Eocene, were exhumed part way along the top of the slab, and were ultimately exhumed by mid­crustal detachments in the mid­Miocene. Blueschists at Kini exhibit...
Conference Paper
We investigate the rheological properties of a deep subduction interface using exhumed metabasites exposed at Kini beach on Syros Island, Greece. Syros rocks were subducted to ~60 km in the Eocene, were exhumed part way along the top of the slab, and were ultimately exhumed by mid-crustal detachments in the mid-Miocene. Blueschists at Kini exhibit...

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Projects

Projects (3)
Project
Implement challenge- and inquiry-based learning in K-12 classrooms to improve minoritized students' engagement and interest in Geosciences
Project
Combine structural and microstructural analysis, thermobarometry, and geochronology to decipher the polyphase tectonometamorphic history of the Cycladic Blueschist Unit exposed on Syros Island, Greece