Author Archive

Eclogitization and Shear Zone Kinematics: Conclusions

By • Apr 18th, 2018 • Category: Honors Thesis, Research

It has been a long research process but an incredibly rewarding one. Below are the conclusions I was able to draw from my results and analyses: The rocks both within SZ2 and adjacent to it derive from the same gabbroic-gabbronoritic host protolith based on a variety of petrologic data and analyses. The rocks are massive…
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Eclogitization and Shear Zone Kinematics: Paleo-stress Estimates

By • Mar 28th, 2018 • Category: Honors Thesis, Research

At this point all of my analyses have been completed, all of my data has been collected, the majority of my thesis is written, the majority of my figures have been created, and I am focusing on preparing for my Southeast GSA conference presentation in a few weeks. I will also be presenting my work…
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Shear Zone Kinematics: Displacement and Vorticity Numbers

By • Feb 18th, 2018 • Category: Honors Thesis, Research

Recently I have been making calculations to estimate the displacement along Shear Zone 2 (SZ2). This requires integrating the shear strain across the width of the zone and accounting for the vorticity number for a particular sample, or more generally, the average vorticity number for the shear zone. Shear strain is the ratio of length…
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Eclogitization and Shear Zone Kinematics: Microprobe and EBSD Analyses in Process

By • Jan 20th, 2018 • Category: Honors Thesis, Research

Three of the thin section chips have been sent off to be made into polished thin sections, and with these I will be able to complete an electron microprobe analysis and an Electron Backscatter Diffraction (EBSD) analysis. The microprobe analysis will be able to tell me the specific mineral chemistry of particular grains in my…
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Eclogitization in the Lofoten Islands: Petrology-based Hypothesis

By • Dec 19th, 2017 • Category: Honors Thesis, Research

As I continue with my analyses, I have had to split my time between my structural analyses and my petrologic analyses. In the case of the structural component, as a reminder, I am trying to quantify the kinematics of my shear zones’ burial and exhumation. In regards to the petrology, I am looking for distinct…
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Shear Zone Kinematics: Fabric Analyses via 3D Strain Calculations

By • Nov 8th, 2017 • Category: Honors Thesis, Research

As I mentioned in my post from last month, recently I have been focusing on making structural calculations for my rock samples in order to meet my research goal of quantifying the kinematics of these shear zones. Aspect ratio calculations and plotting have been receiving most of my attention, and I have been using a…
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Eclogitization in the Lofoten Islands: Structural Analysis

By • Oct 22nd, 2017 • Category: Honors Thesis, Research

Much of the first few weeks with my thin sections were devoted to the petrologic aspects of my research. As I mentioned in last month’s post, I carefully analyzed each thin section for the minerals with which it was made up, made preliminary measurements, made decisions on which thin sections would be best to use…
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Eclogitization in the Lofoten Islands: Thin Section Arrival

By • Sep 4th, 2017 • Category: Honors Thesis, Research

My thin sections have finally arrived and the wait is over! I sent off 20 small blocks of rock (each no more than 3 inches by 1 inch and approximately half an inch thick) and they came back to me in the form of microscope slides. I can now view my rocks samples using a…
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Eclogitization and Shear Zone Kinematics: Geochemistry Data

By • Aug 17th, 2017 • Category: Honors Thesis, Research

After six weeks of waiting, I have received my samples that were processed for geochemistry but still await the arrival of my thin sections. Thus, I have been spending some quality time with my geochemistry analysis data this month, and have been able to start a preliminary petrographic analysis of my samples. My geochemistry data…
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Eclogite Analysis: Thin Section and Geochemistry Sample Preparation

By • Jul 10th, 2017 • Category: Honors Thesis, Research

After many weeks of sawing, cutting, slicing, cleaning, careful labeling, and extremely careful packaging, twenty thin section blocks have been made from my rock samples and shipped off to be transformed into microscope slides. The majority of them came from rock samples taken from Shear Zone 2, at my Nusfjord site, while the minority of…
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