Geology-Paleontology

The Geology/Paleontology faculty are exploring processes recorded in the rock record, including sedimentary, structural, igneous, marine, planetary and glacial geology; paleontology and geobiology. Research is process-oriented and interdisciplinary, with a strong field component. Active areas of research include faulting and crustal deformation within the lithopshere and along tectonic plate boundaries, the sedimentary record of climate and sea-level change, tectonic drivers of magmatism, volcanic systems, the evolution of the crust and mantle in the context of seafloor spreading, subduction zone processes, arc magmatism and ocean island volcanoes, glacial and landslide geomorphology, the structure and evolution of deeply exhumed rocks, and the evolution of life. Many of these topics include both terrestrial and marine approaches. The faculty has developed strong collaborations with scientists at the American Museum of Natural History.

Edmond A. Mathez
Personal Information
Edmond
A.
Mathez
American Museum of Natural History
Adjunct Senior Research Scientist
Lamont-Doherty Earth Observatory
Geochemistry
Contact Information
425 Comer
Palisades
NY
10964-8000
US
(845) 365-8699

Fax: 

(845) 365-8155
Education
Ph.D.
University of Washington
1999
M.S.E.
University of Washington
1994
B.S.M.E.
Columbia University
1992
Susanne Straub
Personal Information
Susanne
Straub
Lamont Associate Research Professor
Lamont-Doherty Earth Observatory
Geochemistry
Contact Information
415 Comer
61 Route 9W - PO Box 1000
Palisades
NY
10964-8000
US
(845) 365-8464

Fax: 

(845) 365-8155

Fields of interest: 

Magmatic fluxes in subduction zones

The processing of crustal and mantle materials in subduction zones plays a key role in creating and maintaining the habitable Earth. In order to understand the impact of magmatic subduction zones fluxes on the broader geochemical cycles, I pursue integrative geochemical and geological studies in the intra-oceanic Izu-Bonin-Mariana Arc (NW Pacific), and the continental Trans-Mexican Volcanic Belt. 
 

The lifetime of arcs (~20-100 myr) scales to the evolution of the Earth’s mantle and crustal reservoirs as well as to the plate tectonic cycle, to the opening and closing of ocean gateways, and to the evolution of the global climate. Understanding if and how the arc outflux is linked to these cycles requires a temporally precise and highly resolved record of arc evolution. Such a record is preserved in the minute igneous particles of marine tephra fallout and can be obtained by using state-of-the-art analytical techniques. 
 

My research in Mexico focuses on understanding arc growth rates as key variable of mass balance calculations. We begun a study that shall lead to a closer integration of geochemistry with geology and volumes of extrusive series emplaced through time. This will allow us to relate subduction parameters (e.g. crustal thickness, convergence rate) to the chemical compositions of convergent margin volcanics and to test various hypotheses for the formation of convergent margin magmas. This data base project is complemented by selected field studies that aim to understand differentiation and origin of the alkaline and calc-alkaline magmas of the Mexican Volcanic Belt.

Active projects:

  • Testing the Processes of Melt Differentiation in the Mexican Volcanic Belt, NSF-EAR
  • Sr-Nd-Pb-Hf isotope evolution of the Mariana volcanic arc, NSF-EAR (MARGINS) 
Education
Habilitation
Christian-Albrechts-Universität, Kiel, Germany
2004
Ph.D.
Christian-Albrechts-Universität, Kiel, Germany
1991
Diplom ( ~M.Sc.)
Technische Universität Clausthal, Clausthal-Zellerfeld, Germany
1988
Selected Publications:
Geochemical and Petrological Insights into the Tectonic Origin of the Transmexican Volcanic Belt, Gómez-Tuena, A.; Mori, L.; Straub, S.M. Earth Science Reviews (2017) doi:10.1016/j.earscirev. 2016.12.006
Late Cenozoic Tephrostratigraphy Offshore Southern Central America: 2. Implications for magma subduction rates and subduction erosion, Schindlbeck, J.C.; Kutterolf, S.; Freundt, A.; Straub, S.M.; Vannuchi, P.; Alvarado, G.E. Geochem Geophys Geosys, Volume: 17 p.: 4585–4604 (2016) doi:10.1002/2016GC006504.
Crustal Recycling by Subduction Erosion in the central Mexican Volcanic Belt, Straub, S. M.; Gómez-Tuena,.; Bolge, L. L.; Brandl, A., Espinasa-Perena, R.; Solari, L.; Stuart, F. M.; Vannucchi, P.; Zellmer, G. F. Geochim Cosmochim Acta, Volume: 166 p.: 29-52 (2015) doi 10.1016/j.gca.2015.06.001
Temporal Evolution of the Mariana Arc: Mantle Wedge and Subducted Slab Controls Revealed with a Tephra Perspective, Straub, S. M.; Woodhead, J. D.; Arculus, R. J. Journal of Petrology, Volume: 56 (2) p.: 409-439 (2015) doi 10.1093/petrology/egv005.
Eolian dust input to the Subarctic North Pacific, Serno, S.; Winckler, G.; Anderson, R.F.; Hayes, C.T.; McGee, D.; Machalett, B.; Ren, H.; Straub, S.M.; Gersonde, R.; Haug, G.H. Earth and Planetary Science Letters, Volume: 387 p.: 252-263 (2014)
A Genetic Link between Silicic Slab Components and Calc-Alkaline Arc Volcanism in central Mexico, Straub, S.M.; Zellmer, G.F.; Gómez-Tuena, A.; Espinasa-Perena, R.; Martin-Del Pozzo, A.L.; Stuart, F.M.; Langmuir, C.H. Geol Soc Lon Spec Pub 385 p.: 31-64 (2014) doi 10.1144/SP385.14
The processes of melt differentiation in arc volcanic rocks: Insights from OIB-type arc magmas in the central Mexican Volcanic Belt, Straub, S.M.; Gomez-Tuena, A.; Zellmer, G.F.; Espinasa-Perena, R.; Stuart, F.M.; Cai, Y.; Langmuir, C.H.; Martin-Del Pozzo, A.; Mesko, G.T. J Petrol p.: 665-701 (2013) doi:10.1093/petrology/egs081
Formation of Hybrid Arc Andesites beneath Thick Continental Crust, Straub, S. M.; Gómez-Tuena, A.; Stuart, F. M.; Zellmer, G. F.; Espinasa-Perena, R.; Cai, Y.; Iizuka, Y. Earth Planet Sci Lett, Volume: 303 p.: 337-347 (2011) doi 10.1016/j.epsl.2011.01.013.
Mid-ocean-ridge basalt of Indian type in the northwest Pacific Ocean basin, Straub, S. M.; Goldstein, S. L.; Class, C.; Schmidt, A. Nature Geoscience Apr, Volume: 2, Issue: 4 p.: 286-289 (2009) Doi 10.1038/Ngeo471
Evidence from high-Ni olivines for a hybridized peridotite/pyroxenite source for orogenic andesites from the central Mexican Volcanic Belt, Straub, S. M.; LaGatta, A. B.; Pozzo, A. L. M. D.; Langmuir, C. H. Geochemistry Geophysics Geosystems Mar 7, Volume: 9 p.: - (2008) Doi 10.1029/2007gc001583
The systematics of chlorine, fluorine, and water in Izu arc front volcanic rocks: Implications for volatile recycling in subduction zones, Straub, S. M.; Layne, G. D. Geochimica Et Cosmochimica Acta Nov, Volume: 67, Issue: 21 p.: 4179-4203 (2003) Doi 10.1016/S0016-7037(00)00307-7
Heather Savage
Personal Information
Heather
Savage
Lamont Associate Research Professor
Lamont-Doherty Earth Observatory
Seismology Geology and Tectonophysics
Contact Information
226 Seismology
61 Route 9W - PO Box 1000
Palisades
NY
10964-8000
US
(845) 365-8720

Fax: 

(845) 365-8150
Education
PhD
Penn State University
2007
MS
University of Massachusetts
2002
BA
Colgate University
1998
Helene Carton
Personal Information
Helene
Carton
Adjunct Associate Research Scientist
Lamont-Doherty Earth Observatory
Marine Geology and Geophysics
Contact Information

Fields of interest: 

Mid-ocean ridges, oceanic crust, subduction zones, transform boundaries, multi-channel and wide-angle seismics

I am a marine geophysicist specialized in active source (reflection and refraction) seismic imaging. My research interests include mid-ocean ridge processes, the structure and evolution of oceanic crust and uppermost mantle, subduction zone processes and submarine strike-slip fault systems. I am also interested in airgun source modeling and underwater sound propagation.

Current projects:

  • Study of the structure, evolution and hydration of the Juan de Fuca plate along a ridge-to-trench wide-angle reflection-refraction transect (Endeavour segment to Washington margin) and Cascadia subduction zone structure in Washington
  • 3D multi-channel seismic imaging of the axial magma lens and seismic layer 2A at the East Pacific Rise 9 50'N Ridge 2000 Integrated Study Site
  • Bending-related faulting and subduction of oceanic reliefs at the southern and central Sumatra margin using seismic reflection profiles of the 2009 CGGVeritas survey and multibeam bathymetry
  • Airgun source/ sound propagation modeling for marine mammal mitigation

Cruises since 2007: R/V Langseth 3D seismic shakedown in the Gulf of Mexico (January 2008), 3D MCS cruise MGL0812 at the East Pacific Rise 9 50'N (June-August 2008), CGGVeritas - M/V Wavefield Inseis long-offset survey of the Sumatra subduction zone (May 2009), R/V Langseth JMS inspection (March 2011), Cruise 0C1206A on the Juan de Fuca plate and Cascadia subduction zone (June-July 2012)

Research Blog: http://www.ldeo.columbia.edu/research/blogs/cascadia-in-motion

Education
Ph.D., Geophysics
Institut de Physique du Globe de Paris, France
12/2005
Diploma
Ecole de Physique du Globe de Strasbourg, France
12/2001
DEA (~MSc), Geophysics
Universite Louis Pasteur, Strasbourg, France
06/2001
Selected Publications:
Fine-scale segmentation of the crustal magma reservoir beneath the East Pacific Rise, Carbotte, S.M.; Marjanovic, M.; Carton, H.; Mutter, J.C.; Canales, J.P.; Nedimovic, M.R.; Han, S.; Perfit, M. Nature Geoscience, Volume: 6 p.: 866-870 (2013) doi:10.1038/ngeo1933
Deep seismic reflection images of the Wharton Basin oceanic crust and uppermost mantle offshore northern Sumatra: Relation with active and past deformation, Carton, H.; Singh, S.C.; Hananto, N.; Martin, J.; Djajadihardja, Y.; Udrekh; Franke, D.; Gaedicke, C. Journal of Geophysical Research (2013)
Network of off-axis melt bodies at the East Pacific Rise, Canales, J.P.; Carton, H.; Carbotte, S.M.; Mutter, J.; Nedimovic, M.; Xu, M.; Aghaei, O.; Marjanovic, M.; Newman, K. Nature Geoscience, Volume: 5 p.: 279-283 (2012) doi:10.1038/ngeo1377
Aseismic zone and earthquake segmentation associated with a deep subducted seamount, Singh, S.C.; Hananto, N.; Mukti, M.; Robinson, D.; Das, S.; Chauhan, A.; Carton, H.; Gratacos, B.; Midenet, S.; Djajadihardja, Y.; Harjono, H. Nature Geoscience, Volume: 4 p.: 308-311 (2011) doi:10.1038/ngeo1119
Seismic evidence for Neogene and active shortening offshore of Lebanon (Shalimar cruise), Carton, H.; Singh, S. C.; Tapponnier, P.; Elias, A.; Briais, A.; Sursock, A.; Jomaa, R.; King, G. C. P.; Daeron, M.; Jacques, E.; Barrier, L. Journal of Geophysical Research-Solid Earth Jul 24, Volume: 114 p.: - (2009) Doi 10.1029/2007jb005391
Seismic evidence for broken oceanic crust in the 2004 Sumatra earthquake epicentral region, Singh, S. C.; Carton, H.; Tapponnier, P.; Hananto, N. D.; Chauhan, A. P. S.; Hartoyo, D.; Bayly, M.; Moeljopranoto, S.; Bunting, T.; Christie, P.; Lubis, H.; Martin, J. Nature Geoscience Nov, Volume: 1, Issue: 11 p.: 777-781 (2008) Doi 10.1038/Ngeo336
Seismic imaging of the three-dimensional architecture of the Cinarcik Basin along the North Anatolian Fault, Carton, H.; Singh, S. C.; Hirn, A.; Bazin, S.; de Voogd, B.; Vigner, A.; Ricolleau, A.; Cetin, S.; Ocakoglu, N.; Karakoc, F.; Sevilgen, V. Journal of Geophysical Research-Solid Earth Jun 21, Volume: 112, Issue: B6 p.: - (2007) Doi 10.1029/2006jb004548
Thrusting offshore Mt Lebanon: source of the tsunamigenic, 551 AD Beyrut-Tripoli earthquake, Elias, A.; Tapponnier, P.; Singh, S.C.; King, G.; Briais, A.; Daëron, M.; Carton, H.; Sursock, A.; Jacques, E.; Jomaa, R.; Klinger, Y. Geology, Volume: 35, Issue: 8 p.: 755-758 (2007)
Discovery of a magma chamber and faults beneath a Mid-Atlantic Ridge hydrothermal field, Singh, S. C.; Crawford, W. C.; Carton, H.; Seher, T.; Combier, V.; Cannat, M.; Canales, J. P.; Dusunur, D.; Escartin, J.; Miranda, J. M. Nature Aug 31, Volume: 442, Issue: 7106 p.: 1029-1032 (2006) Doi 10.1038/Nature05105
Cornelia Class
Personal Information
Cornelia
Class
Lamont Associate Research Professor
Lamont-Doherty Earth Observatory
Geochemistry
Lecturer
Earth and Environmental Sciences
Contact Information
439 Comer
61 Route 9W - PO Box 1000
Palisades
NY
10964-8000
US
(845) 365-8712

Fax: 

(845) 365-8155

Fields of interest: 

Solid Earth Geochemistry and Dynamics

As a student I became fascinated by the ability of geochemical tools to *look* into the otherwise inaccessible Earth's mantle and constrain its heterogeneity and temporal evolution as well as aspects of its convective regimes. Combined with the stunning beauty of volcanoes, which provide such *windows* into the Earth's interior, mantle geochemistry became my passion. In an attempt to understand the present and past geology of the mantle, I integrate a wide range of analytical techniques (major and trace elements, Sr-Nd-Pb-Hf-Os isotopic compositions and noble gases) to quantify geochemical processes wherever possible. My present research focuses on the following questions: (i) Constraints on the age and precursor materials of plume sources, (ii) Processes of plume-lithosphere interaction, identification of deep mantle plume components, and the composition of old oceanic lithospheric mantle, (iii) The significance of detached continental lithosphere in the source regions of oceanic basalts and processes of detachment, (iv) Processes of element transport from subducting slabs to the sub-arc mantle, (v) The subcontinental lithospheric mantle as a chemical layer and its role in volcanism, and (vi) The origin of primordial 3He in oceanic basalts and its implications for mantle dynamics. 

Some of my current projects include:

  • Dynamic and geochemical evolution of the lithospheric mantle beneath the Western Ross Sea, Antarctica. Cathleen Doherty's graduate research project.
  • The role of magmatism during early stage rifting - a multidisciplinary, multinational study in the southern part of the East African Rift. Gary Mesko's graduate research project.
  • Plate tectonic and geochemical evolution of the young Walvis Ridge and implications for African plate motion modeling, plume zonation and sources related to the African large low shear wave velocity province. Cruise website.
  • Evolution of the Galapagos mantle plume.
Education
Ph.D. (Dr. rer. nat.)
Max-Planck Institute for Geochemistry Mainz and University of Karlsruhe, Germany
1994
MA (Diplom Mineraloge)
University of Karlsruhe, Germany
1990
Selected Publications:
High precision Sr-Nd-Hf-Pb isotopic compositions of USGS Standard Reference Material BCR-2, Jweda, J., Bolge, L., Class, C., Goldstein, S.L. Geostandards and Geoanalytical Research (2015)
Metasomatism of the Pan-African lithospheric mantle beneath the Damara Belt, Namibia, by the Tristan mantle plume: geochemical evidence from mantle xenoliths, le Roex, A. P.; Class, C. Contributions to Mineralogy and Petrology, Volume: 168 (2014) 10.1007/s00410-014-1046-y
Meter-scale Nd isotopic heterogeneity in pyroxenite-bearing Ligurian peridotites encompasses global-scale upper mantle variability, Borghini, G.; Rampone, E.; Zanetti, A.; Class, C.; Cipriani, A.; Hofmann, A.W.; Goldstein, S.L. Geology, Volume: 41 p.: 1055-1058 (2013) 10.1130/g34438.1
How double volcanic chains sample geochemical anomalies from the lowermost mantle, Farnetani, C. G.; Hofmann, A. W.; Class, C. Earth and Planetary Science Letters, Volume: 359-360 p.: 240-247 (2012) 10.1016/j.epsl.2012.09.057
Hotspot trails in the South Atlantic hospot controlled by plume and plate tectonic processes, O'Connor, J.M.; Jokat, W.; le Roex, A.P.; Class, C.; Wijbrans, J.R.; Keßling, S.; Kuiper, K.F.; Nebel, O. Nature Geoscience, Volume: 5 p.: 735-738 (2012) 10.1038/NGEO1583
South Atlantic DUPAL anomaly - Dynamic and compositional evidence against a recent shallow origin, Class, C.; le Roex, A. P. Earth and Planetary Science Letters, Volume: 305 p.: 92-102 (2011)
Osmium isotopes in Grande Comore lavas: constraints on EM-type mantle components, Class, C; Goldstein, S L; Shirey, S B Earth and Planetary Letters, Volume: 284 p.: 219-227 (2009)
Ce anomalies in Gough Island lavas - Trace element characteristics of a recycled sediment component, Class, C.; le Roex, A. P. Earth and Planetary Science Letters Jan 30, Volume: 265, Issue: 3-4 p.: 475-486 (2008) DOI 10.1016/j.epsl.2007.10.030
Continental material in the shallow oceanic mantle - How does it get there?, Class, C.; le Roex, A. P. Geology Mar, Volume: 34, Issue: 3 p.: 129-132 (2006) Doi 10.1103/G21943.1
Evolution of helium isotopes in the Earth's mantle, Class, C.; Goldstein, S. L. Nature Aug 25, Volume: 436, Issue: 7054 p.: 1107-1112 (2005) Doi 10.1038/Nature03930
Distinguishing melt and fluid subduction components in Umnak volcanics, Aleutian Arc, Class, C.; Miller, D. M.; Goldstein, S. L.; Langmuir, C. H. Geochemistry Geophysics Geosystems, Volume: 1, Issue: 6 (2000) 10.1029/1999GC000010
Plume-lithosphere interactions in the ocean basins: constraints from the source mineralogy, Class, C.; Goldstein, S. L. Earth and Planetary Science Letters Aug, Volume: 150, Issue: 3-4 p.: 245-260 (1997)
Michael S. Steckler
Personal Information
Michael
S.
Steckler
Lamont Research Professor
Lamont-Doherty Earth Observatory
Marine Geology and Geophysics
Contact Information
108E Oceanography
61 Route 9W - PO Box 1000
Palisades
NY
10964-8000
US
(845) 365-8479

Fax: 

(845) 365-8156

Fields of interest: 

Tectonics of Sedimentary Basins, Isostasy, Stratigraphic Modeling, Marine Geophysics

Some of projects include:

  • PIRE: Life On A Tectonically-Active Delta: Convergence Of Earth Science And Geohazard Research In Bangladesh With Education And Capacity ( details )
  • Collaborative Research: Uplift and faulting at the transition from subduction to collision - A field and modeling study of the Calabrian Arc ( details )
  • Collaborative Research: Basin Evolution along Continental Transforms: Nested Hi-Resolution Multichannel Survey in the Marmara Sea, Turkey (details)
  • Collision of the Burma Arc accretionary prism with the Ganges-Brahmaputra Delta in Bangladesh
  • Modeling gravity filed and earth deformation from monsoonal flooding in Bangladesh using hydrographic, GRACE and GPS data
  • RAPID: Collaborative Research: Off-Shore Coseismic Effects Of The Port Au Prince Earthquake, Haiti (details)
Education
Ph.D. Thesis: The Thermal and Mechanical Evolution of Atlantic-type Continental Margins.
Columbia University
1981
B.S.
Massachusetts Institute of Technology
1976
Luc Lavier (UTIG)
Dave Reynolds (Exxon)
Selected Publications:
Continental transform basins: Why are they asymmetric?, Seeber, L; Sorlien, C; Steckler, M; Cormier, M-H EOS, Volume: 91, Issue: 4 p.: 29-30 (2010)
Modeling Earth Deformation from Monsoonal Flooding in Bangladesh using Hydrographic, GPS and GRACE Data, Steckler, MS; Nooner, SL; Akhter, SH; Chowdhury, SK; Bettadpur, S; Seeber, L; Kogan, MG J Geophys Res (2010)
Spectroscopy of Sediments in the Ganges-Brahmaputra Delta: Spectral Effects of Moisture, Grain Size and Lithology, Small, C; Steckler, M; Seeber, N; Akhter, H; Goodbred, S; Mia, B; Imam, B Remote Sensing of Environment, Volume: 113 p.: 342-361 (2009)
Imaging the subducted slab beneath the Calabrian Arc, Italy, from receiver function analysis, Piana Agostinetti, N; Steckler, M S; Lucente, F P Lithosphere - GSA Journal , Volume: 1 p.: 131-138 (2009)
Collision of the Ganges-Brahmaputra Delta with the Burma Arc: Implications for earthquake hazard, Steckler, M. S.; Akhter, S. H.; Seeber, L. Earth and Planetary Science Letters Sep 15, Volume: 273, Issue: 3-4 p.: 367-378 (2008) DOI 10.1016/j.epsl.2008.07.009
Modeling of sequence geometry north of Gargano Peninsula by changing sediment pathways in the Adriatic Sea, Steckler, M. S.; Ridente, D.; Trincardi, F. Continental Shelf Research Feb 1, Volume: 27, Issue: 3-4 p.: 526-541 (2007) DOI 10.1016/j.csr.2006.11.007
Seismic anisotropy reveals focused mantle flow around the Calabrian slab (Southern Italy), Baccheschi, P.; Margheriti, L.; Steckler, M. S. Geophysical Research Letters Mar 3, Volume: 34, Issue: 5 p.: - (2007) Doi 10.1029/2006gl028899
Chapter IX: Prediction of margin stratigraphy, Syvitski, J. P. M.; Pratson, L.; Wiberg, P.; Steckler, M.; Garcia, M.; Geyer, R.; Harris, C.; Hutton, E.; Imran, J.; Lee, H.; Morehead; M.; Parker, G. Continental-Margin Sedimentation: Transport to Sequence, Volume: 37 p.: 459-530 (2007)
Suzanne M. Carbotte
Personal Information
Suzanne
M.
Carbotte
Bruce C. Heezen/Lamont Research Professor
Lamont-Doherty Earth Observatory
Marine Geology and Geophysics
Contact Information
305D Oceanography
61 Route 9W - PO Box 1000
Palisades
NY
10964-8000
US
(845) 365-8895

Fax: 

(845) 365-8156

Fields of interest: 

Marine Geophysics, Mid-Ocean Ridges, Multi-channel seismics, Hudson Estuary

My primary research interests concern the formation of oceanic crust at the global mid-ocean ridge. I make use of a variety of marine geophysical techniques, including reflection seismic studies to image the interior of oceanic crust and acoustic methods to image the seafloor surface of the crust. One focus of my ridge studies is the extensional failure of newly formed crust. Faulting at mid-ocean ridges is one of the primary relief forming processes that shapes the seafloor. Tectonism plays an important role in determining the subsurface architecture of ridge crest hydrothermal systems and is also one of the key drivers of change in these hydrothermal systems. As crust ages and moves away from the ridge by sea-floor spreading, the faults formed near the axis provide conduits for ongoing low-temperature seawater circulation by which chemical exchange between the oceans and the earth's crust continues for millions of years after crustal creation. My current work involves the application of seismic methods to study the alteration of the crust that occurs as a result of these fluid-rock interactions on the Juan de Fuca plate. I have also used comparative studies of fault parameters and brittle strain at ridges spreading at different rates to better understand the processes governing extensional failure on the ridge crest.

The other focus of my ridge research concerns the origin of the segmentation of mid-ocean ridges. Segmentation is linked to both the pattern of melt delivery from the mantle and the thermal structure of the axial lithosphere, and plays an important role in crustal accretion and subsequent disruption by brittle deformation. My research interests include using reflection seismics to image magma chambers beneath ridges and to characterize the relationship between the magmatic segmentation of the crust defined by these magma bodies and morphological segmentation. In recent work characterizing morphological changes along the ridge, I have found that ridge segmentation may be directly related to plate kinematics, resulting from the migration of the plates over the mantle. From analysis of changes in ridge morphology across large discontinuities of the fast and intermediate spreading ridges we find that the shallow and broad ridge segments are consistently leading in the hotspot reference frame. We attribute these relationships to asymmetric mantle upwelling and melt production beneath migrating ridges, with entrainment of melts generated in the upwelling zone of adjacent segments across discontinuities.

In addition to these mid-ocean ridge studies I am also involved in the application of similar marine geophysical techniques to study sedimentary processes and characterize benthic habitats in the near shore setting. Beginning in 1998 I have been involved in a major collaborative effort with researchers at Lamont, SUNY, CUNY and IES to map the Hudson River estuary. With funding from the New York State DEC, we completed mapping the entire length of the Hudson from the New York Harbor to the Troy Dam in 2004. Our maps of the river bottom reveal a fascinating record of human activities within the Hudson Valley over the past several hundred years. My particular interests in this project are the evolution of the river during the Holocene and the linkages between rising sea-level and climate fluctuations with the changing faunal populations documented in the river sediments.

Some of projects include:

  • Marine Geoscience Data Management System ( details )
  • Hudson River Benthic Mapping Project ( details )


Education
Ph.D.
University of California
1992
MSc
Queen's University, Kingston, Canada
1986
HBSc
University of Toronto, Canada
1982
Janet Baran
Delwayne Bohnenstiehl
Gustavo Correa
Angela Slagle
Selected Publications:
Seismic reflection images of a near-axis melt sill within the lower crust at the Juan de Fuca Ridge, Canales J P; Nedimovi, M R; Kent G; Carbotte, SM; Detrick, R S Nature, Volume: 460 p.: 89-93 (2009)
Variable crustal structure along the Juan de Fuca Ridge: Influence of on-axis hot spots and absolute plate motions, Carbotte, S. M.; Nedimovic, M. R.; Canales, J. P.; Kent, G. M.; Harding, A. J.; Marjanovic, M. Geochemistry Geophysics Geosystems Aug 2, Volume: 9 p.: - (2008) Doi 10.1029/2007gc001922
Rift topography linked to magmatism at the intermediate spreading Juan de Fuca Ridge, Carbotte, S. M.; Detrick, R. S.; Harding, A.; Canales, J. P.; Babcock, J.; Kent, G.; Van Ark, E.; Nedimovic, M.; Diebold, J. Geology Mar, Volume: 34, Issue: 3 p.: 209-212 (2006)
Frozen magma lenses below the oceanic crust, Nedimovic, M. R.; Carbotte, S. M.; Harding, A. J.; Detrick, R. S.; Canales, J. P.; Diebold, J. B.; Kent, G. M.; Tischer, M.; Babcock, J. M. Nature Aug 25, Volume: 436, Issue: 7054 p.: 1149-1152 (2005) Doi 10.1038/Nature03944
Environmental change and oyster colonization within the Hudson River estuary linked to Holocene climate, Carbotte, S. M.; Bell, R. E.; Ryan, W. B. F.; McHugh, C.; Slagle, A.; Nitsche, F.; Rubenstone, J. Geo-Marine Letters Nov, Volume: 24, Issue: 4 p.: 212-224 (2004) DOI 10.1007/s00367-004-0179-9
The influence of ridge migration on the magmatic segmentation of mid-ocean ridges, Carbotte, S. M.; Small, C.; Donnelly, K. Nature Jun 17, Volume: 429, Issue: 6993 p.: 743-746 (2004) Doi 10.1038/Nature02652
Variability of Ocean Crustal Structure Created Along the Global Midocean Ridge, Carbotte, S.;Scheirer, D. S. Hydrogeology of the Oceanic Lithosphere (2004)
Gisela Winckler
Personal Information
Gisela
Winckler
Lamont Research Professor
Lamont-Doherty Earth Observatory
Geochemistry
Lecturer
Lamont-Doherty Earth Observatory
Contact Information
209 Comer
61 Route 9W - PO Box 1000
Palisades
NY
10964-8000
US
(845) 365-8756

Fax: 

(845) 365-8155

Fields of interest: 

Marine geochemistry, Paleoclimatology, Paleoceanography, Tracer oceanography, dust, paleoclimate

My research interests involve the application of trace elements and isotopes, such as noble gases, radiogenic, cosmogenic, and extraterrestrial nuclides as well as oxygen, carbon and hydrogen isotopes, to problems at the interface between climate, biogeochemistry, and environmental studies., Most of my studies focus on marine systems, both modern and paleo. More recently, I have started working with ice cores as an archive of past climate conditions.

Education
Ph.D.
Institute of Environmental Physics, University of Heidelberg
1998
Diploma
Institute of Environmental Physics, University of Heidelberg
1993
Selected Publications:
Mantle helium reveals Southern Ocean hydrothermal venting, Winckler, G.; Newton, R.; Schlosser, P.;Crone, T Geophysical Research Letters (2010) 10.1029/2009GL042093
Covariant glacial-interglacial dust fluxes in the equatorial Pacific and Antarctica, Winckler, G.; Anderson, R. F.; Fleisher, M. Q.; McGee, D.; Mahowald, N. Science Apr 4, Volume: 320, Issue: 5872 p.: 93-96 (2008) DOI 10.1126/science.1150595
30,000 years of cosmic dust in Antarctic ice, Winckler, G.; Fischer, H. Science Jul 28, Volume: 313, Issue: 5786 p.: 491-491 (2006) DOI 10.1126/science.1127469
Equatorial Pacific productivity and dust flux during the mid-Pleistocene climate transition, Winckler, G.; Anderson, R. F.; Schlosser, P. Paleoceanography Dec 17, Volume: 20, Issue: 4 p.: - (2005) Doi 10.1029/2005pa001177
Does interplanetary dust control 100 kyr glacial cycles?, Winckler, G.; Anderson, R. F.; Stute, M.; Schlosser, P. Quaternary Science Reviews Oct, Volume: 23, Issue: 18-19 p.: 1873-1878 (2004) DOI 10.1016/j.quascirev.2004.05.007
Noble gases and radiocarbon in natural gas hydrates, Winckler, G.; Aeschbach-Hertig, W.; Holocher, J.; Kipfer, R.; Levin, I.; Poss, C.; Rehder, G.; Suess, E.; Schlosser, P. Geophysical Research Letters May 15, Volume: 29, Issue: 10 p.: - (2002) Doi 10.1029/2001gl014013
Salty brines on the Mediterranean sea floor, Wallmann, K.; Suess, E.; Westbrook, G. H.; Winckler, G.; Cita, M. B. Nature May 1, Volume: 387, Issue: 6628 p.: 31-32 (1997)
Meredith Nettles
Personal Information
Meredith
Nettles
Associate Professor
Lamont-Doherty Earth Observatory
Seismology Geology and Tectonophysics
Contact Information
230D Seismology
61 Route 9W - PO Box 1000
Palisades
NY
10964-8000
US
(845) 365-8613

Fax: 

(845) 365-8150

 

Education
Ph. D.
Harvard University
2005
M.S.
The University of Arizona
2000
A.B.
Harvard University
1995

Pages