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Scholarly Interest Report
         
Rajdeep Dasgupta
Professor
Professor in Earth Science
 
e-mail:Rajdeep.Dasgupta@rice.edu
 
  • Ph.D. Geology (2006) University of Minnesota, Minneapolis, MN, USA
  • M.Sc. Applied Geology (2000) Jadavpur University, Kolkata, India
  • B.Sc. Geological Sciences (1998) Jadavpur University, Kolkata, India
 
Primary Department
   Department of Earth, Environmental & Planetary Sciences
Picture
 
Websites
 Personal Webpage
 
Research Areas
 Petrology, Experimental Petrology, Igneous Processes, Planetary Differentiation, Core-mantle exchange, Evolution of metallic cores in planetary bodies, Deep carbon cycle, Deep sulfur cycle in terrestrial planets, Subduction zone processes and volatile cycling, Intraplate volcanism, Mantle heterogeneity, Magmatism in other terrestrial planets such as Mars and Venus
 

Compositional heterogeneities in the Earth’s mantle and generation of oceanic basalts

 

Basalts from intra plate ocean islands provide a window to the Earth's convecting mantle. One of my long-standing interests is to constrain the mineralogic, lithologic, and volatile heterogeneities present in the Earth’s mantle by reproducing the chemistry of the primary basalts through laboratory experiments. I combine both experimental and natural observations to decipher the possible nature of intraplate basalt source regions in general and those for ocean island basalts in particular. Active research topics in this theme include partial melting behavior of various mantle lithologies (with or without volatiles) aimed at petrogenesis of various flavors of basalts, mantle hybridization via melt-rock reaction and the role of melt-rock reaction and other reactive processes on the generation of erupted basalts.

 

How are the fluids and volatiles inherited in a young Earth? - Magma ocean volatile cycle

 

A key question related to the volatile-budget of the modern Earth is how it changed through time. Did the Earth acquire the volatiles and achieve their present distribution between the exosphere and the interior at the time of birth, or is the present day budget (including ocean and atmosphere) shaped by later processes, such as late addition of materials (e.g., meteorites, comets)? My recent efforts are constraining the volatile element partitioning and solubility in Earth materials during the early differentiation such as at the ‘Magma Ocean’ stage (raining metal droplets in largely molten silicates). We are quantifying the importance of Earth’s metallic core as a reservoir to sequester various volatiles and how the young Earth might have observed very different inventory of volatiles. This new research brings together laboratory experiments and thermal and geochemical models to help constrain the contributions of ongoing versus early differentiation on the volatile and fluid inventory of the Earth.

 

Deep cycles of volatiles in the modern Earth

 

The Earth is unique among the terrestrial planets in our solar system in having a fluid envelope comprising water (H2O), carbon dioxide (CO2), and other volatiles that fosters life. Over million to billion years this is maintained by exchange of volatiles and fluids between the Earth’s interior and the exosphere. My research, over the last few years, provided new insight into partial melting processes of the Earth's upper mantle lithologies in the presence of CO2 and the impact of CO2-induced incipient melting on the geophysical and geochemical properties of the mantle. But still a lot of work remains to be done to constrain the role of mixed C-O-H volatiles on magma genesis and to understand the interplay of redox processes and volatile speciation on the conditions and extent of mantle melting. Our most recent efforts are constraining the efficiency of carbon and water recycling through subduction, devolatilization, and melting of ocean-floor sediments and the solubility of CO2 in hydrous sediment partial melts at sub-arc depths.


While a lot of attentions are given to fully understand the global carbon and water cycle, deep storage and cycles of sulfur have received far less concerted efforts. Thus another new direction that I have started to work on is the petrology of global sulfur cycle. A key question is the efficiency of sulfur transfer from subducting slab to the mantle wedge and the partitioning of sulfur between various phases such as fluids, silicate melts, and mineral sulfides or sulfates and the redox state of sulfur at different tectono-magmatic settings. At present, we are investigating the behavior of basalt hosted sulfides during subduction, dehydration, and melting at a range of oxygen fugacity relevant for the shallow upper mantle. We are demonstrating that mineral sulfide remains abundantly stable during fluid-present melting of subducting ocean crust and hydrous fluid is the key vector to mobilize sulfur from the sulfide-saturated crust to the mantle wedge.

 

Differentiation and volatile evolution of other terrestrial planets

 

As far as understanding the early evolution of terrestrial volatiles goes, there are lessons to be learnt from similar evolution in other terrestrial planetary bodies, such as Mars, the Moon, Venus, and Mercury. We do not know why these planets have drastically different atmosphere. Is this owing to accretion from vastly different compositions, or is this owing to the difference in conditions of early evolution (e.g., thermal and oxidation state and depth of core-mantle separation) that caused very different fractionation of fluids between the interior and the exosphere? Our goal is to compare and contrast the volatiles and fluids evolution of various terrestrial planets through time.


In relation to this, we recently constrained the thermal vigor of magma generation through the geologic history of the red planet. We demonstrated that the thermal state of Martian mantle is hotter than previously thought and hence mantle melting commences at deeper depths. Motivated by the possibility that Martian basalts may be rich in halogens, we also constrained the effect of fluorine and chlorine on the stability of model Martian magmas. To build on these, we are now looking at the efficiency of sulfur degassing aided by eruption of anhydrous or hydrous basalts relevant for Mars. The aim is to constrain the carrying capacity of sulfur in model Martian basalts and to test whether sulfur-bearing species could have been responsible for creating Martian greenhouse in the early history of Mars.

 
Teaching Areas
 Petrology, High temperature geochemistry, Materials characterization
 
Selected Publications
 Abstracts
 

Carter, L. B.*, Holmes, A., Dasgupta, R. & Tumiati, S. (2015). The effects of varying crustal carbonate composition on assimilation and CO2 degassing at arc volcanoes. Abstract V21C-3055 presented at 2015 Fall Meeting, AGU, San Francisco, Calif., 14-18 Dec.

 
 

Dasgupta, R.*, $Jégo, S., Ding, S., $Li, Y. & Lee, C-T. A. (2015). Experimental partitioning of chalcophile elements between mantle silicate minerals and basaltic melt at high pressures and temperatures – Implications for sulfur geochemistry of mantle and crust. Abstract V52A-05 presented at 2015 Fall Meeting, AGU, San Francisco, Calif., 14-18 Dec.

 
 

Ding, S.* & Dasgupta, R. (2015). Solidus of Martian mantle constrained by new high pressure-temperature experiments at nominally anhydrous conditions. 46th Lunar and Planetary Science Conference Abstract no. 2079.

 
 

Duncan, M. S.* & Dasgupta, R. (2015). Experimental constraints on CO2 solubility in terrestrial magma oceans. Abstract P11A-2066 presented at 2015 Fall Meeting, AGU, San Francisco, Calif., 14-18 Dec.

 
 

Eguchi, J.* & Dasgupta, R. (2015). Experimental determination of dissolved CO2 content in nominally anhydrous andesitic melts at graphite/diamond saturation – Remobilization of deeply subducted reduced carbon via partial melts of MORB-like eclogite. Abstract V14C-07 presented at 2015 Fall Meeting, AGU, San Francisco, Calif., 14-18 Dec.

 
 

Filiberto, J.* & Dasgupta, R. (2015). Constraints on the depth and temperature of melting in the Martian mantle. 46th Lunar and Planetary Science Conference Abstract no. 1518.

 
 

Filiberto, J., Bridges, J., Dasgupta, R., Edwards, P., Schwenzer, S. & Wiens, R. (2015). Formation conditions of basalts at Gale crater, Mars from ChemCam analysis. Abstract DI43A-2608 presented at 2015 Fall Meeting, AGU, San Francisco, Calif., 14-18 Dec.

 
 

$Li, Y.*, Dasgupta, R., $Tsuno, K., Monteleone, B. & Shimizu, N. (2015). Carbon solubility and partitioning in Fe-rich alloy and silicate melt systems at 3–8 GPa and 1600°–2200°C: Implications for core-mantle differentiation and degassing of magma oceans. 46th Lunar and Planetary Science Conference Abstract no. 2515.

 
 

$Li,  Y.*, Dasgupta, R., $Tsuno, K., Monteleone, B. & Shmizu, N. (2015). Solubility and partitioning of carbon and sulfur in Fe-rich alloy and silicate melt systems at high pressures and temperatures: Implications for Earth’s heterogeneous accretion. Abstract V33A-3085 presented at 2015 Fall Meeting, AGU, San Francisco, Calif., 14-18 Dec.

 
 

Shorttle, O., Antoshechkina, P., Dasgupta, R., Rudge, J. & Asimow, P. (2015). Geochemical constraints on magma formation and transport processes. Abstract DI51C-03 presented at 2015 Fall Meeting, AGU, San Francisco, Calif., 14-18 Dec.

 
 

Ding, S. & Dasgupta, R. (2015). The fate of sulfur during mantle melting – Implications for sulfur concentration of OIB versus MORB sources. Abstract DI31B-2584 presented at 2015 Fall Meeting, AGU, San Francisco, Calif., 14-18 Dec.

 
 

Mallik, A.*, Dasgupta, R., Tsuno, K. & Nelson, J. (2015). Effect of mantle wedge hybridization by sediment melt on geochemistry of arc magma and arc mantle source – insights from laboratory experiments and high pressures and temperatures. Abstract V11D-3081 presented at 2015 Fall Meeting, AGU, San Francisco, Calif., 14-18 Dec.

 
 

Carter, L. B.* & Dasgupta, R. (2014). Basalt-limestone interaction at crustal conditions and implications for volcanic emission of CO2. Goldschmidt Conference.

 
 

Carter, L. B.* & Dasgupta, R. (2014). Basalt-limestone and andesite-limestone interaction in the arc crust –  Implications for volcanic degassing of CO2. Abstract V31G-04 presented at 2014 Fall Meeting, AGU, San Francisco, Calif., 15-19 Dec.

 
 

Dasgupta, R.* (2014). Lithosphere and asthenosphere properties beneath oceans and continents and their relationship with domains of partial melt stability in the mantle. Abstract DI43B-03 presented at 2014 Fall Meeting, AGU, San Francisco, Calif., 15-19 Dec. [INVITED]

 
 

Dasgupta, R.*, Chi, H., $Li, Y., Duncan, M. S. & $Tsuno, K. (2014). Carbon dissolution in reduced silicate and alloy melts – A frontier for understanding evolution of terrestrial planets. Abstract DI13A-4260 presented at 2014 Fall Meeting, AGU, San Francisco, Calif., 15-19 Dec. [INVITED]

 
 

Dasgupta, R.*, Nelson, J. D., Chi, H., Ding, S., $Li, Y., Duncan, M. S. & $Tsuno, K. (2014). Carbon in the Martian interior: Core-mantle fractionation and extraction by mantle melting at oxidized conditions. Volatiles in the Martian Interior Workshop

 
 

Ding, S.* & Dasgupta, R. (2014). The fate of sulfur during decompression melting of peridotite and crystallization of basalts – Implications for sulfur geochemistry of MORB and the Earth’s upper mantle. Abstract DI21A-4272 presented at 2014 Fall Meeting, AGU, San Francisco, Calif., 15-19 Dec.

 
 

Ding, S.*, Dasgupta, R. & Lee, C-T. A. & Wadhwa, M. (2014). The fate of sulfur during partial melting of the mantle and fractional crystallization of basalts – Implications for the sulfur geochemistry of Martian meteorites and degassing flux of sulfur-rich gases from the Martian interior. Volatiles in the Martian Interior Workshop.

 
 

Ding, S.*, Dasgupta, R., Lee, C-T. A. & Wadhwa, M. (2014). New bulk sulfur measurements of martian meteorites – Implications for sulfur cycle and crust formation on Mars. 45th Lunar and Planetary Science Conference Abstract no. 1717.

 
 

Duncan, M. S.* & Dasgupta, R. (2014). Experimental constraints on CO2 solubility in rhyolitic slab melts – Implications for carbon flux in subduction zones. Abstract V13A-4745 presented at 2014 Fall Meeting, AGU, San Francisco, Calif., 15-19 Dec.

 
 

Garapic, G.*, Mallik, A., Dasgupta, R. & Jackson, M. G. (2014). Oceanic lavas sampling the high 3He/4He mantle reservoir: Primitive, depleted, or re-enriched? Abstract V22B-03 presented at 2014 Fall Meeting, AGU, San Francisco, Calif., 15-19 Dec.

 
 

Lenardic, A., Hoink, T., Jellinek, M., Johnson, C. L., Cowan, N. B., Pierrehumbert, R., Stamenkovic, V., O’Neill, C. & Dasgupta, R. (2014). Life with and life without plate tectonics. Abstract U53A-02 presented at 2014 Fall Meeting, AGU, San Francisco, Calif., 15-19 Dec.

 
 

$Li, Y.*, Dasgupta, R. & Tsuno, K. (2014). Carbon speciation and solubility in graphite-saturated reduced silicate melt: Implications for the degassing of Martian mantle and carbon in Martian magma ocean. Volatiles in the Martian Interior Workshop

 
 

Mallik, A.*, Nelson, J. & Dasgupta, R. (2014). Hybridization of mantle-wedge by hydrous sediment partial melt and generation of ultra-potassic arc lavas. Goldschmidt Conference. [INVITED]

 
 

Mallik, A.*, Dasgupta, R., Nelson, J. & $Tsuno, K. (2014). Effect of bulk water concentration on mantle wedge hybridization by rhyolitic sediment melt – Implications for generation of K-rich basalts to andesites in subduction zones. Abstract DI24A-05 presented at 2014 Fall Meeting, AGU, San Francisco, Calif., 15-19 Dec.

 
 

Muth, M.*, Duncan, M. S. & Dasgupta, R. (2014). Effect of variable Na/K ratio on CO2 solubility in slab-derived rhyolitic melts – An experimental study. Abstract DI13A-4266 presented at 2014 Fall Meeting, AGU, San Francisco, Calif., 15-19 Dec.

 
 

$Tsuno, K.* & Dasgupta, R. (2014). Carbon storage in the mid- to deep- upper mantle constrained by phase relations in the Fe-Ni-Cu-C-S system. Abstract V11D-03 presented at 2014 Fall Meeting, AGU, San Francisco, Calif., 15-19 Dec.

 
 Refereed articles
 

Carter, L. B. & Dasgupta, R. (2015). Hydrous basalt-limestone interaction at crustal conditions: Implications for generation of ultracalcic melts and outflux of CO2 at volcanic arcs. Earth and Planetary Science Letters 427, 202-214. doi:10.1016/j.epsl.2015.06.053

 
 

Ding, S., Dasgupta, R., Lee, C.-T. A. & Wadhwa, M. (2015). New bulk sulfur measurements of Martian meteorites and modeling the fate of sulfur during melting and crystallization – Implications for sulfur transport from Martian mantle to crust-atmosphere system. Earth and Planetary Science Letters 409, 157-167. doi:10.1016/j.epsl.2014.10.046

 
 

Duncan, M. S. & Dasgupta, R. (2015). Pressure and temperature dependence of CO2 solubility in hydrous rhyolitic melt – Implications for carbon transfer to mantle source of volcanic arcs via partial melt of subducting crustal lithologies. Contributions to Mineralogy and Petrology 169, 1-19. doi: 10.1007/s00410-015-1144-5

 
 

Filiberto, J. & Dasgupta, R. (2015). Constraints on the depth and thermal vigor of melting in the Martian mantle. Journal of Geophysical Research – Planets 120, 109-122. doi:10.1002/2014JE004745

 
 

Garapić, G., Mallik, A., Dasgupta, R., & Jackson, M. G. (2015). Petrologic character of high 3He/4He mantle – Primitive, depleted, or re-enriched? American Mineralogist 100, 2066-2081. doi:10.2138/am-2015-5154

 
 

Le Roux, V., Dasgupta, R. & Lee, C-T. A. (2015). Recommended mineral-melt partition coefficients for FRTEs (Cu), Ga, and Ge during mantle melting. American Mineralogist 100, 2533-2544.doi:10.2138/am-2015-5215

 
 

Li, Y., Dasgupta, R., Tsuno, K. (2015). The effects of sulfur, silicon, water, and oxygen fugacity on carbon solubility and partitioning in Fe-rich alloy melt-silicate melt systems at 3 GPa and 1600 °C – Implications for core-mantle differentiation and degassing of magma oceans and reduced planetary mantles. Earth and Planetary Science Letters 415, 54-66. doi:10.1016/j.epsl.2015.01.017

 
 

Mallik, A., Nelson, J. & Dasgupta, R. (2015). Partial melting of fertile peridotite fluxed by a hydrous rhyolite at 2-3 GPa: Implications for mantle wedge hybridization by sediment melt and generation of ultra-potassic magmas in convergent margins. Contributions to Mineralogy and Petrology 169, 1-24. doi:10.1007/s00410-015-1139-2

 
 

Tsuno, K. & Dasgupta, R. (2015). Fe-Ni-Cu-C-S phase relations at high pressures and temperatures – The role of sulfur in carbon storage and diamond stability at mid- to deep- upper mantle. Earth and Planetary Science Letters 412, 132-142. doi:10.1016/j.epsl.2014.12.018

 
 

Chi, H., Dasgupta, R., Duncan, M. S. & Shimizu, N. (2014). Partitioning of carbon between Fe-rich alloy melt and silicate melt in a magma ocean – implications for the abundance and origin of volatiles in Earth, Mars, and the Moon. Geochimica et Cosmochimica Acta 139, 447-471. doi:10.1016/j.gca.2014.04.046

 
 

Ding, S., Dasgupta, R. & $Tsuno, K. (2014). Sulfur concentration of martian basalts at sulfide saturation at high pressures and temperatures – implications for deep sulfur cycle on Mars. Geochimica et Cosmochimica Acta 131, 227-246. doi:10.1016/j.gca.2014.02.003

 
 

Filiberto, J., Dasgupta, R., Gross, J. & Treiman, A. H. (2014). Effect of chlorine on near-liquidus phase equilibria of an Fe-Mg-rich tholeiitic basalt. Contributions to Mineralogy and Petrology 168, 1-13. doi:10.1007/s00410-014-1027-1

 
 

Jégo, S. & Dasgupta, R. (2014). The fate of sulfur during fluid-present melting of subducting basaltic crust at variable oxygen fugacity. Journal of Petrology 55, 1019-1050. doi:10.1093/petrology/egu016

 
 

Mallik, A. & Dasgupta, R. (2014). Effect of variable CO2 on eclogite-derived andesite-lherzolite reaction at 3 GPa – Implications for mantle source characteristics of alkalic ocean island basalts. Geochemistry, Geophysics, Geosystems 15, 1533-1557. doi:10.1002/2014GC005251

 
 

Buono, A., Dasgupta, R., Lee, C-T. A. & Walker, D. (2013). Siderophile element partitioning between cohenite and liquid in Fe-Ni-S-C systems and implications for geochemistry of planetary cores and mantles. Geochimica et Cosmochimica Acta 120, 239-250.

 
 

Dasgupta, R. (2013). Ingassing, storage, and outgassing of terrestrial carbon through geologic time. Reviews in Mineralogy and Geochemistry 75, 183-229. doi:10.2138/rmg.2013.75.7

 
 

Dasgupta, R., Chi, H., Shimizu, N., *Buono, A. & Walker, D. (2013). Carbon solution and partitioning between metallic and silicate melts in a shallow magma ocean: implications for the origin and distribution of terrestrial carbon. Geochimica et Cosmochimica Acta 102, 191-202. doi:10.1016/j.gca.2012.10.011

 
 

Dasgupta, R., Mallik, A., $Tsuno, K., Withers, A. C., Hirth, G. & Hirschmann, M. M. (2013). Carbon-dioxide-rich silicate melt in the Earth’s upper mantle. Nature 493, 211-215.

 
 

Jégo, S. & Dasgupta, R. (2013). Fluid-present melting of sulfide-bearing ocean-crust: Experimental constraints on the transport of sulfur from slab to mantle wedge. Geochimica et Cosmochimica Acta 110, 106-134.

 
 

Lee, C-T. A., Shen, B., Slotnik, B. S., Liao, K., Dickens, G. R., Yokoyama, Y., Lenardic, A., Dasgupta, R., Jellinek, M., Lackey, J., Schneider, T. & Tice, M. M. (2013). Continent-island arc fluctuations, growth of crustal carbonates, and long-term climate change. Geosphere 9, 21-36. doi:10.1130/GES00822.1

 
 

Mallik, A. & Dasgupta, R. (2013). Reactive infiltration of MORB-eclogite-derived carbonated silicate melt into fertile peridotite at 3 GPa and genesis of alkalic magmas. Journal of Petrology 54, 2267-2300. doi:http://dx.doi.org/10.1093/petrology/egt047

 
 

Walker, D., Dasgupta, R., Li, J. & Buono, A. S. (2013). Nonstoichiometry and growth of some Fe carbides. Contributions to Mineralogy and Petrology 166, 935-957. doi:http://dx.doi.org/10.1007/s00410-013-0900-7

 
 

Filiberto, J., Wood, J., Dasgupta, R., Shimizu, N., Le, L. & Treiman, A. (2012). Effect of fluorine on near-liquidus phase equilibria of an Fe-Mg rich basalt. Chemical Geology 312-313, 118-126. doi:10.1016/j.chemgeo.2012.1004.1015

 
 

Lee, C-T. A., Luffi, P., Chin, E. J., Bouchet, R., Dasgupta, R., Morton, D. M., $Le Roux, V., Yin, Q. & Jin, D. (2012). Copper systematics in arc magmas and implications for crust-mantle differentiation. Science 336, 64-68. doi: 10.1126/science.1217313

 
 

Mallik, A. & Dasgupta, R. (2012). Reaction between MORB-eclogite derived melts and fertile peridotite and generation of ocean island basalts. Earth and Planetary Science Letters 329-330, 97-108. doi:10.1016/j.epsl.2012.02.007

 
 

Tsuno, K. & Dasgupta, R. (2012). The effect of carbonates on near-solidus melting of pelite at 3 GPa: relative efficiency of H2O and CO2 subduction. Earth and Planetary Science Letters 319-320, 185-196. doi:10.1016/j.epsl.2011.12.007

 
 

Tsuno, K., Dasgupta, R., Danielson, L. & Righter, K. (2012). Flux of carbonate melt from deeply subducted pelitic sediments – geophysical and geochemical implications for the source of Central American volcanic arc. Geophysical Research Letters 39, L16307. doi:10.1029/2012GL052606

 
 

Filiberto, J. & Dasgupta, R. (2011). Fe2+-Mg partitioning between olivine and basaltic melts: applications to genesis of olivine-phyric shergottites and conditions of melting in the Martian interior. Earth and Planetary Science Letters 304, 527-537. doi:10.1016/j.epsl.2011.02.029

 
 

Le Roux, V., Dasgupta, R. & Lee, C-T. A. (2011). Mineralogic heterogeneities in the Earth’s mantle: constraints from Mn, Co, Ni, and Zn partitioning during partial melting. Earth and Planetary Science Letters 307, 395-408. doi:10.1016/j.epsl.2011.05.014

 
 

Sanloup, C., van Westrenen, W., Dasgupta, R., Maynard-Casely, H. & Perrillat, J-P. (2011). Compressibility change in molten iron-rich metal at high pressure and models of core formation. Earth and Planetary Science Letters 306, 118-122. doi: 10.1016/j.epsl.2011.03.039

 
 

Tsuno, K. & Dasgupta, R. (2011). Melting phase relation of nominally anhydrous, carbonated pelitic-eclogite at 2.5-3.0 GPa and deep cycling of sedimentary carbon. Contributions to Mineralogy and Petrology 161, 743-763. doi:10.1007/s00410-010-0560-9

 
 

Lee, C-T. A., Luffi, P., Höink, T., Li, J., Dasgupta, R. & Hernlund, J. (2010). Upside-down differentiation and generation of a ‘primordial’ lower mantle. Nature 463, 930-933. doi:10.1038/nature08824

 
 

Lee, C-T. A., Luffi, P., Le Roux, V., Dasgupta, R., Albaréde, F. & Leeman, W. P. (2010). The redox state of arc mantle using Zn/Fe systematics. Nature 468, 681-685. doi:10.1038/nature09617

 
 

Dasgupta, R., Buono, A., Whelan, G. & Walker, D. (2009). High-pressure melting relations in Fe-C-S systems: implications for formation, evolution, and structure of metallic cores in planetary bodies. Geochimica et Cosmochimica Acta 73, 6678-6691. doi:10.1016/j.gca.2009.08.001

 
 

Dasgupta, R., Hirschmann, M. M., McDonough, W. F., Spiegelman, M. & Withers, A. C. (2009). Trace element partitioning between garnet lherzolite and carbonatite at 6.6 and 8.6 GPa with applications to the geochemistry of the mantle and of mantle-derived melts. Chemical Geology 262, 57-77. doi:10.1016/j.chemgeo.2009.02.004

 
 

Dasgupta, R., Jackson, M. G. & Lee, C-T. A. (2010). Major element chemistry of ocean island basalts - conditions of mantle melting and heterogeneity of mantle source. Earth and Planetary Science Letters 289, 377-392. doi:10.1016/j.epsl.2009.11.027

 
 

Hirschmann, M. M. & Dasgupta, R. (2009). The H/C ratios of Earth’s near-surface and deep reservoirs, and consequences for deep Earth volatile cycles. Chemical Geology 262, 4-16. doi:10.1016/j.chemgeo.2009.02.008

 
 

Lord, O. T., Walter, M. J., Dasgupta, R., Walker, D. & Clark, S. M. (2009). Melting in the Fe-C system to 70 GPa. Earth and Planetary Science Letters 284, 157-167. doi:10.1016/j.epsl.2009.04.017

 
 

Dasgupta, R. & Hirschmann, M. M. (2007). A modified iterative sandwich method for determination of near-solidus partial melt compositions. II. Application to determination of near-solidus melt compositions of carbonated peridotite. Contributions to Mineralogy and Petrology 154, 647-661. doi:10.1007/s00410-007-0214-8

 
 

Dasgupta, R. & Hirschmann, M. M. (2007). Effect of variable carbonate concentration on the solidus of mantle peridotite. American Mineralogist 92, 370-379. doi:10.2138/am.2007.2201

 
 

Dasgupta, R. & Hirschmann, M. M. (2006). Melting in the Earth's deep upper mantle caused by carbon dioxide. Nature 440, 659-662. doi:10.1038/nature04612

 
 

Dasgupta, R. & Walker, D. (2008). Carbon solubility in core melts in a shallow magma ocean environment and distribution of carbon between the Earth's core and the mantle. Geochimica et Cosmochimica Acta 72, 4627-4641. doi:10.1016/j.gca.2008.06.023

 
 

Dasgupta, R., Hirschmann, M. M. & Dellas, N. (2005). The effect of bulk composition on the solidus of carbonated eclogite from partial melting experiments at 3 GPa. Contributions to Mineralogy and Petrology 149, 288-305. doi:10.1007/s00410-004-0649-0

 
 

Dasgupta, R., Hirschmann, M. M. & Smith, N. D. (2007). Partial melting experiments of peridotite + CO2 at 3 GPa and genesis of alkalic ocean island basalts. Journal of Petrology 48, 2093-2124. doi:10.1093/petrology/egm053

 
 

Dasgupta, R., Hirschmann, M. M. & Smith, N. D. (2007). Water follows carbon: CO2 incites deep silicate melting and dehydration beneath mid-ocean ridges. Geology 35, 135-138. doi:10.1130/G22856A.1

 
 

Dasgupta, R., Hirschmann, M. M. & Stalker, K. (2006). Immiscible transition from carbonate-rich to silicate-rich melts in the 3 GPa melting interval of eclogite+CO2 and genesis of silica-undersaturated ocean island lavas. Journal of Petrology 47, 647-671. doi:10.1093/petrology/egi088

 
 

Dasgupta, R., Hirschmann, M. M. & Withers, A. C. (2004). Deep global cycling of carbon constrained by the solidus of anhydrous, carbonated eclogite under upper mantle conditions. Earth and Planetary Science Letters 227, 73-85. doi:10.1016/j.epsl.2004.08.004

 
 

Hirschmann, M. M. & Dasgupta, R. (2007). A modified iterative sandwich method for determination of near-solidus partial melt compositions. I. Theoretical considerations. Contributions to Mineralogy and Petrology 154, 635-645. doi:10.1007/s00410-007-0213-9

 
 Jackson, M. G. & Dasgupta, R. (2008). Compositions of HIMU, EM1, and EM2 from global trends between radiogenic isotopes and major elements in ocean island basalts. Earth and Planetary Science Letters 276, 175-186. doi:10.1016/j.epsl.2008.09.023
 
Presentations
 Invited Papers
 

"Invited participant – Deep Carbon Observatory Extreme Physics and Chemistry Workshop."

 
 Invited Talks
 

"Earth’s Deep and not so Deep Volatile Cycles." Packard Fellows Meeting, Monterey, CA. (09/10/2015)

 
 

"Experimental Partitioning of Chalcophile Elements between Mantle Silicate Minerals and Basaltic Melt at High Pressures and Temperatures - Implications for Sulfur Geochemistry of mantle and Crust." Fall AGU, San Francisco, CA. (12/18/2015) With Jego, S., Ding, S., Li, Y., and Lee, C-T. A.

 
 

"Origin and evolution of C-O-H volatiles in terrestrial magma ocean, Earth’s Hadean mantle, and atmosphere." Goldschmidt Conference, Prague, Czech Republic. (August) With Duncan, M. S. and Li, Y.

 
 

Invited Talk - Dave Walker retirement symposium, Lamont-Doherty Earth Observatory – December 05; “‘Core’ Issues of Mantle Volatiles”

 
 Lectures
 

"EARTH’S DEEP CARBON CYCLE – ORIGIN, STORAGE, INGASSING, AND OUTGASSING." Department of Earth and Environmental Sciences, University of Rochester. (01/30/2015)

 
 

"Earth’s Deep Carbon Cycle – Origin, Ingassing, Storage, and Outgassing." Department of Earth and Planetary Science, Harvard University, (09/21/2015)

 
 Panelist
 

NSF EAR Panel Member

 
 Seminar Speaker
 

Invited Talk - Institut für Geowissenschaften, Universität Frankfurt – November 17; “Earth’s Deep Carbon Cycle – Origin, Storage, Ingassing, and Outgassing”

 
Editorial Positions
 Associate Editor, Geochimica et Cosmochimica Acta. Elsevier. (2013 - 2016)

Supervised Theses & Dissertations
 Megan S. Duncan, PhD Carbon in Silicate Melt - Experimental Constraints and Applications for the Subduction Zone and Magma Ocean Carbon Cycles. (2015) (Thesis Director)

 Michelle Muth, BSc The role of Na/K ratio on CO2 solubility in hydrous rhyolitic melt. (2015) (Thesis Director)

 Shuo Ding, PhD Mantle Melting and Deep Sulfur Cycle on Earth and Mars. (2016) (Thesis Director)

Awards, Prizes, & Fellowships
 James B. Macelwane Medal, American Geophysical Union (12/17/2014)

 Fellow, American Geophysical Union, American Geophysical Union (12/17/2014)

 NSF Faculty Early CAREER Award, National Science Foundation (03/15/2013)

 Hisashi Kuno Award, Volcanology, Geochemistry, Petrology section of American Geophysical Union (12/04/2012)

 F. W. Clarke Medal, Geochemical Society (08/14/2011)

 Packard Fellowship for Science and Engineering, The David and Lucile Packard Foundation (10/15/2010)

Positions Held
 Adjunct Associate Research Scientist, LDEO, Columbia University. (2008 - 2016)

 Visiting Scientist, Lunar and Planetary Institute, Universities Space Research Association. (2009 - 2016)