Large-Scale and Long-Term Volcanism on Oceanic Lithosphere

Koppers, Anthony A. P.; Sager, William W.

doi:10.1016/b978-0-444-62617-2.00019-0

Cited by 2 publications

(3 citation statements)

References 145 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…While drilling provides only a limited, one‐dimensional record of volcano evolution, it can yield the most stratigraphically complete record of volcanism at a given location. Previous work has utilized drilling to constrain hotspot volcano evolution at, for example, Hawai'i (e.g., Garcia et al, ; Kurz et al, ; Lassiter et al, ), Louisville (Koppers & Sager, ), Marquesas (Caroff et al, ), Kerguelen (Neal et al, ; Wallace et al, ; Weis & Frey, ), and Iceland (e.g., Flower et al, ). However, to date there has been no Samoan drilling project.…”

Section: Introductionmentioning

confidence: 99%

“Petit Spot” Rejuvenated Volcanism Superimposed on Plume‐Derived Samoan Shield Volcanoes: Evidence From a 645‐m Drill Core From Tutuila Island, American Samoa

Reinhard

Jackson

Blusztajn

et al. 2019

Geochem Geophys Geosyst

View full text Add to dashboard Cite

In 2015 a geothermal exploration well was drilled on the island of Tutuila, American Samoa. The sample suite from the drill core provides 645 m of volcanic stratigraphy from a Samoan volcano, spanning 1.45 million years of volcanic history. In the Tutuila drill core, shield lavas with an EM2 (enriched mantle 2) signature are observed at depth, spanning 1.46 to 1.44 Ma. These are overlain by younger (1.35 to 1.17 Ma) shield lavas with a primordial “common” (focus zone) component interlayered with lavas that sample a depleted mantle component. Following ~1.15 Myr of volcanic quiescence, rejuvenated volcanism initiated at 24.3 ka and samples an EM1 (enriched mantle 1) component. The timing of the initiation of rejuvenated volcanism on Tutuila suggests that rejuvenated volcanism may be tectonically driven, as Samoan hotspot volcanoes approach the northern terminus of the Tonga Trench. This is consistent with a model where the timing of rejuvenated volcanism at Tutuila and at other Samoan volcanoes relates to their distance from the Tonga Trench. Notably, the Samoan rejuvenated lavas have EM1 isotopic compositions distinct from shield lavas that are geochemically similar to “petit spot” lavas erupted outboard of the Japan Trench and late stage lavas erupted at Christmas Island located outboard of the Sunda Trench. Therefore, like the Samoan rejuvenated lavas, petit spot volcanism in general appears to be related to tectonic uplift outboard of subduction zones, and existing geochemical data suggest that petit spots share similar EM1 isotopic signatures.

show abstract

Section: Introductionmentioning

confidence: 99%

“Petit Spot” Rejuvenated Volcanism Superimposed on Plume‐Derived Samoan Shield Volcanoes: Evidence From a 645‐m Drill Core From Tutuila Island, American Samoa

Reinhard

Jackson

Blusztajn

et al. 2019

Geochem Geophys Geosyst

View full text Add to dashboard Cite

show abstract

“…It is primarily generated through partial melting of a parent rock, regardless of its composition. This buoyant magma can ascend, leading to volcanism, or become stalled at depth, resulting in plutonism (Koppers and Sager, 2014). This overall process is known as magmatism.…”

Section: Basalt Compositionmentioning

confidence: 99%

“…Ernst, 2021). These basalts consist mainly of tholeiitic composition and are thought to originate from mantle plumes or melting of the subcontinental lithosphere triggered by mantle plumes (Koppers and Sager, 2014).…”

Section: Basalt Compositionmentioning

confidence: 99%

CO2 mineralization process in basalt rocks: study case, Serra Geral Formation, Paraná sedimentary Basin, São Paulo state

Alzate Rubio

View full text Add to dashboard Cite

To my beloved parents and Fabi, This thesis is dedicated to you, with immeasurable gratitude and profound love. Your unwavering support, encouragement, and sacrifice have been the bedrock upon which my academic journey has been built. Your faith in me, even during my moments of doubt, has been a constant source of inspiration. Your sacrifice has allowed me to pursue my dreams with unrelenting determination. I am eternally grateful for it.This thesis stands as a testament to the love and support you have generously bestowed upon me. It is a reflection of the values and principles you instilled in me, and a tribute to the incredible parents who have always believed in my potential, even when I haven't myself.With all my heart, I dedicate this thesis to you, my pillars of strength, my mentors, and my greatest supporters. Thank you for being the wind beneath my wings, propelling me toward academic achievement and personal growth.With deepest love and gratitude, Valentina viii I would like to express my heartfelt gratitude to all those who have been instrumental in the successful completion of my master journey. Without your support, guidance, and encouragement, this accomplishment would not have been possible.First and foremost, I extend my sincere appreciation to my advisor Colombo, whose unwavering dedication, expertise, and invaluable insights have been the cornerstone of this research. Your mentorship has not only enriched my academic experience but also inspired me to push the boundaries of knowledge.I am deeply indebted to the entire IGc -Geoscience Institute and IEE -Energy and Environment Institute for fostering an intellectually stimulating environment that nurtured my research endeavors. The collaborative spirit and resources provided by the institutes played a fundamental role in shaping the outcome of this thesis.My gratitude extends across borders to my friends from another life, you have been a source of camaraderie, support, and moments of respite throughout this journey. Your presence, both in the academic and personal spheres, has made this experience all the more enriching.To my friends in Brazil, o meu bloquinho de meninas, who have offered friendship, cultural exchange, unwavering encouragement and warm hugs. Your diverse perspectives and love have broadened my horizons and enriched my life.Lastly, I would like to acknowledge all the individuals, institutions, and resources that have contributed to this thesis as well: The amazing technical support from Samuca from LTA laboratory, the Scanning electron microscopy laboratory, in charge of Eng. Isaac, the X-ray fluorescence laboratory and help of tec. José Paulo Sertek and the Optical microscopy laboratories of the IGc.

show abstract

Large-Scale and Long-Term Volcanism on Oceanic Lithosphere

Cited by 2 publications

References 145 publications

“Petit Spot” Rejuvenated Volcanism Superimposed on Plume‐Derived Samoan Shield Volcanoes: Evidence From a 645‐m Drill Core From Tutuila Island, American Samoa

“Petit Spot” Rejuvenated Volcanism Superimposed on Plume‐Derived Samoan Shield Volcanoes: Evidence From a 645‐m Drill Core From Tutuila Island, American Samoa

CO2 mineralization process in basalt rocks: study case, Serra Geral Formation, Paraná sedimentary Basin, São Paulo state

Contact Info

Product

Resources

About