DI009
Exploring the Origin, Evolution and Implications of Lithosphere and Upper Mantle Heterogeneities
Session ID#: 79529
Session Description:
Earth’s lithosphere constitutes the upper thermal boundary layer of mantle convection. Oceanic lithosphere is recycled into the mantle, while continental lithosphere remains mostly intact, buoyant enough to withstand recycling and therefore evolving slowly over geologic time. Because of this dichotomy, the lithosphere is globally heterogeneous. This heterogeneity is manifested in various forms, including rheological, structural and compositional stratification (both lateral and vertical) inherited from both the time of formation and recent tectonic processes.
Deciphering the interaction of the lithosphere with the deeper convective mantle is important for the better understanding of lithosphere-mantle coupling processes and to reconcile models with natural observations.
We aim to bring together diverse disciplines that focus on the composition, rheology and deformation of the lithosphere and upper mantle. Some key areas of interest are, but not limited to, lithospheric structure, rheology, morphology, deformation, as well as active and passive margins evolution and dynamics, and subduction processes.
Co-Organized:
Index Terms:
7218 Lithosphere [SEISMOLOGY]
8110 Continental tectonics: general [TECTONOPHYSICS]
8120 Dynamics of lithosphere and mantle: general [TECTONOPHYSICS]
8170 Subduction zone processes [TECTONOPHYSICS]
Primary Convener: Roberta Carluccio, University of Melbourne, Parkville, VIC, Australia
Conveners: Heather A Ford, University of California Riverside, Department of Earth and Planetary Sciences, Riverside, CA, United States, Emily J Chin, Brown Univeristy, Providence, RI, United States and D. Graham Pearson, University of Alberta, Earth and Atmospheric Sciences, Edmonton, AB, Canada
Primary Liaison: Heather A Ford, Yale University, New Haven, CT, United States
What can We Learn from REE Abundances in Clinopyroxene and Orthopyroxene in Spinel Peridotites? (506803)
Zejia Ji, Providence, RI, United States, Boda Liu, Brown University, Providence, RI, United States and Yan Liang, Brown University, Department of Earth, Environmental and Planetary Sciences, Providence, RI, United States
Implication on the Density Structure of Cratonic Lithosphere from Global Topography and Gravity Anomaly (531403)
Yaoyi Wang1, Lijun Liu2, Jiashun Hu1 and Quan Zhou3, (1)University of Illinois at Urbana Champaign, Urbana, IL, United States, (2)University of Illinois at Urbana-Champaign, Urbana, IL, United States, (3)Geophysics, School of Geodesy and Geomatics, Wuhan University, China, Wuhan, China
Metasomatic and metamorphic overprints on the Archean Ulamertoq ultramafic body in the southern West Greenland (533364)
Ikuya Nishio1, Tomoaki Morishita1, Kristoffer Szilas2, Akihiro Tamura1, Juan-Miguel Guotana1, Kenichiro Tani3, Yumiko Harigane4 and D. Graham Pearson5, (1)Kanazawa University, Department of Earth Science, Kanazawa, Japan, (2)University of Copenhagen, København K, Denmark, (3)National Museum of Nature and Science, Ibaraki, Japan, (4)Geological Survey of Japan, AIST, Research Institute of Geology and Geoinformation, Tsukuba, Japan, (5)University of Alberta, Earth and Atmospheric Sciences, Edmonton, AB, Canada
The Depth, Sharpness, and Strength of the G Discontinuity from S-to-p Receiver Functions at the NoMelt Site in the Central Pacific (536587)
Hannah F Mark, Massachusetts Institute of Technology, Cambridge, MA, United States; MIT/WHOI Joint Program, Woods Hole, MA, United States, John A Collins, WHOI, Woods Hole, MA, United States, Daniel Lizarralde, Woods Hole Oceanographic Institution, Geology and Geophysics, Woods Hole, MA, United States, Greg Hirth, Brown Univeristy, Department of Earth, Environmental, and Planetary Sciences, Providence, RI, United States, James B Gaherty, Columbia University in the City of New York, Lamont-Doherty Earth Observatory, Palisades, NY, United States and Robert L Evans, Woods Hole Oceanographic Institution, Woods Hole, MA, United States
Lithospheric Structure in the Southeastern US using Reverberation-Corrected Receiver Functions (547449)
Erin Cunningham, University of Maryland College Park, Geology, College Park, MD, United States, Lara S Wagner, UNC-Chapel Hill, Chapel Hill, NC, United States and Vedran Lekic, University of Maryland, Department of Geology, College Park, MD, United States
High temperature-pressure single-crystal elastic properties of omphacite (548847)
Ming Hao1, Jin Zhang1,2, Wenyi Zhou3 and Caroline E Pierotti4, (1)University of New Mexico Main Campus, Albuquerque, NM, United States, (2)Sacramento, CA, United States, (3)University of New Mexico Main Campus, Albuquerque, United States, (4)Albuquerque High School, Albuquerque, NM, United States
Thermal lithosphere structure of Tibet and adjacent regions based on a new thermal isostasy method (580311)
Bing Xia, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China, Irina M Artemieva, University of Copenhagen, København K, Denmark and Hans Thybo, Univ Copenhagen, Copenhagen K, Denmark
Highly siderophile elements and Osmium isotopes in abyssal peridotites from the Southwest Indian Ridge (626699)
Wei Li, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, China, Chuan-Zhou Liu, Institute of Geology and Geophysics, Chinese Academy of Sciences, State Key Laboratory of Lithospheric Evolution, Beijing, China, Chunhui Tao, Second Institute of Oceanography, MNR, China, Hangzhou, China and Zhenmin Jin, China University of Geosciences Wuhan, Wuhan, China
