The role of lithospheric gabbros on the composition of Galapagos lavas

Saal, A. E.; Kurz, Mark D.; Hart, Stanley R.; Blusztajn, J.; Blichert‐Toft, Janne; Liang, Yan; Geist, D.

doi:10.1016/j.epsl.2007.02.040

Cited by 78 publications

(109 citation statements)

References 69 publications

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“…and Hémond, 2000;Sobolev et al, 2000), (2) the interaction of basalts with plagioclase-rich cumulates during melt percolation through the oceanic lithosphere in an oceanic intra-plate setting (Danyushevsky et al, 2004;Gurenko and Sobolev, 2006;Saal et al, 2007), and (3) assimilation of gneiss derived from continental crust in continental intra-plate settings. Having erupted in a continental intra-plate tectonic setting (Yan et al, 2008), the second hypothesis can be ruled out for the Hainan basalts and, as discussed in Section 5.3 there is little evidence for crustal contamination in the Hainan basalts (Zou and Fan, 2010).…”

Section: Lithology Of Mantle Sourcementioning

confidence: 99%

Petrogenesis of Late Cenozoic basalts from North Hainan Island: Constraints from melt inclusions and their host olivines

Liu

Ren

Nichols

et al. 2015

Geochimica et Cosmochimica Acta

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Section: Lithology Of Mantle Sourcementioning

confidence: 99%

Petrogenesis of Late Cenozoic basalts from North Hainan Island: Constraints from melt inclusions and their host olivines

Liu

Ren

Nichols

et al. 2015

Geochimica et Cosmochimica Acta

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“…MAG-B-47 is a subaerial sample collected from Mangaia and has one of the most radiogenic Pb-isotopic (HIMU) compositions measured in an OIB [Hauri and Hart, 1993]. Samoan lavas ALIA-115-18 and ALIA-115-21 (and clinopyroxene separates from these samples), dredged from the flanks of the island of Savai', were selected for their extreme 87 Sr/ 86 Sr compositions (>0.721 [Jackson et al, 2007a] Nd Roden et al, 1994] He ratios (>30 Ra [Kurz et al, 1982] [Jackson et al, 2007b]) and Fernandina island in the Galapagos (NSK-97-214 [Kurz and Geist, 1999;Saal et al, 2007;Jackson et al, 2008] (Table 2). Following correction for both Ce and Sm interferences all samples exhibit 142 Nd/ 144 Nd ratios that are indistinguishable from the terrestrial standard.…”

Section: Sample Descriptions and Locationsmentioning

confidence: 99%

Homogeneous superchondritic ¹⁴²Nd/¹⁴⁴Nd in the mid‐ocean ridge basalt and ocean island basalt mantle

Jackson

Carlson

2012

Geochem Geophys Geosyst

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Nd measurements on 11 different lavas from five hot spots, and one lava each from the Indian and Atlantic ridges. The lavas examined in this study bracket much of the known Sr-Nd-Pb-He isotopic variability the in mantle. These data complement existing high-precision 142 Nd/ 144Nd data on MORB and OIB lavas. In agreement with previous studies, we find that MORB and OIB lavas examined for high-precision 142 Nd/ 144 Nd exhibit ratios that are indistinguishable from the terrestrial standard and are 15-20 ppm higher than the average obtained for ordinary and enstatite chondrites. The uniform, superchondritic 142 Nd/ 144 Nd data in OIB and MORB are consistent with derivation from a common, early formed (<30 Ma after accretion) progenitor reservoir with Sm/Nd $6% higher than chondrites. If there exists any variability in 142 Nd/ 144 Nd in the OIBs and MORBs examined to date, it is too small to be resolved with the precision currently available.

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“…1). While the association of positive TITAN anomalies and high 3 He/ 4 He (or plume) signatures were previously observed regionally in Hawaii (Dixon et al, 2001), Iceland (Fitton, 1997) and the Galapagos (Kurz and Geist, 1999;Saal et al, 2007), we suggest that the large, positive TITAN anomalies are a global phenomenon in high 3 He/ 4 He OIBs. The primitive-mantle normalized trace element patterns (spidergrams) of the highest 3 He/ 4 He lavas from Hawaii, Iceland, Galapagos and Samoa all share prominent, anomalous enrichment in the TITAN elements compared to elements of similar compatibility in peridotite (Fig.…”

Section: New Data and Observationsmentioning

confidence: 73%

“…In Fig. 1, these new data are presented together with previously published ICP-MS trace element data for the highest 3 He/ 4 He Galapagos lava (30.2 Ra; Kurz and Geist, 1999;Saal et al, 2007). These high 3 He/ 4 He lavas exhibit Ti, Ta, and Nb excesses, or positive anomalies, relative to elements of similar compatitiblity in peridotite (on a primitive mantle normalized basis, see Fig.…”

Section: New Data and Observationsmentioning

confidence: 96%

Dismantling the deep earth : geochemical constraints from hotspot lavas for the origin and lengthscales of mantle heterogeneity

Jackson¹

2008

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AcknowledgementsFirst off, I want to thank my advisor, Stan Hart, for being so generous, with his time, his resources, and his thoughts. Stan sent me to the edges of the earth to collect rocks on islands and by sea ("a happy student is a traveling student"). And the fishing trips didn't end when I got back to the lab. When I went to him for answers, I often just ended up with more questions, we'd dream up a dozen projects, and he'd send me off with more projects and questions (back in my office, I'd realize that the meeting didn't go as I'd planned)! But the questions were more important than the answers: the questions will keep me employed after I graduate! It's only now that I'm realizing that without so much independence to explore (though frightening at times), I may have never understood that I was capable of generating some fun ideas! I can't express my gratitude to Nobu Shimizu and Mark Kurz for their "open door" policy. They are always ready to give me time, sit down, and hash out new ideas. Their offices are idea factories. I don't know how I would have written this thesis without their constant input.My deepest appreciation to J. Collins for sweating it out with me in the field in Samoa, and to the rest of my committee, P. Kelemen, Erik Hauri and Fred Frey for their stimulating input and for traveling so far to attend the general exam, thesis defense, and committee meetings.J. Blusztajn has always been so optimistic and helpful, and has given me so much of his time and advice. J. Curtice and T. Atwood have also given me dollops of help, and without them I could not have accomplished much of the thesis work.I am so thankful for the friendship of my dear friends, S. Hoffmann, D. Stuebe and J. Blythe, Heidi Marcella, Carolyn Walker, Lauge Sokol-Hessner and Hannah Cole. They kept me going when the times were rough, and we shared many of the best times as well.I am also thankful for the friendship and advice that I received from the "old guard" of JP students, who left the WHOI "nest" before me.

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The role of lithospheric gabbros on the composition of Galapagos lavas

Cited by 78 publications

References 69 publications

Petrogenesis of Late Cenozoic basalts from North Hainan Island: Constraints from melt inclusions and their host olivines

Petrogenesis of Late Cenozoic basalts from North Hainan Island: Constraints from melt inclusions and their host olivines

Homogeneous superchondritic ¹⁴²Nd/¹⁴⁴Nd in the mid‐ocean ridge basalt and ocean island basalt mantle

Dismantling the deep earth : geochemical constraints from hotspot lavas for the origin and lengthscales of mantle heterogeneity

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The role of lithospheric gabbros on the composition of Galapagos lavas

Cited by 78 publications

References 69 publications

Petrogenesis of Late Cenozoic basalts from North Hainan Island: Constraints from melt inclusions and their host olivines

Petrogenesis of Late Cenozoic basalts from North Hainan Island: Constraints from melt inclusions and their host olivines

Homogeneous superchondritic 142Nd/144Nd in the mid‐ocean ridge basalt and ocean island basalt mantle

Dismantling the deep earth : geochemical constraints from hotspot lavas for the origin and lengthscales of mantle heterogeneity

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Homogeneous superchondritic ¹⁴²Nd/¹⁴⁴Nd in the mid‐ocean ridge basalt and ocean island basalt mantle