HYDROTHERMAL FLUID TRANSPORT PATHWAYS ALONG FRACTURES AND VEINS AT BROTHERS VOLCANO, SOUTHERN KERMADEC ARC

<p>Hydrothermal fluid flow in fractures and veins is a key component in the mineralization of economic metals within calderas. But there are several methods by which fractures can form. Regional extension, episodic caldera collapse, and fluid overpressure all have the potential to create brittle features. Current studies focus on the formation of fractures and veins by these methods, but do not focus on the preferred movement of hydrothermal fluids through brittle features, nor which features are more dominant in active hydrothermal systems. This thesis introduces multiple studies to better understand which method of fracture creation dominates Brothers volcano. Data from IODP Exp. 376 shipboard scientists and post expedition studies were used for paleomagnetic reorientation, downhole linear regression correlation of defining characteristics, and thin section observation. This study finds that regional tectonics are limited in their control over fracture formation, and that fluid overpressure and episodic collapse play a larger role in creating preferred pathways for hydrothermal fluid movement. We expect the results of this study to provide better insight on mineralization of young, developing hydrothermal systems that may be targets for economic drilling.</p>

Name thesis:degree_name

Master of Science (MS)

Level thesis:degree_level

Masters Thesis

Year dc:date.available

2023

Author dc:creator

• Atnip, Robert

Contributors dc:contributor

• Dr. Jeremy Deans
• Dr. Alyson Brink
• Dr. Franklin Heitmuller

• Geology
• caldera
• fractures
• veins
• Brothers
• IODP

Repository record dc:identifier

https://aquila.usm.edu/masters_theses/975

OAI identifier oai:identifier

oai:aquila.usm.edu:masters_theses-2049