High pressure experimental investigation of the interaction between partial melts of eclogite and mantle peridotite during upwelling

Zsanett Pintér; Anja Rosenthal; Daniel J. Frost; Catherine A McCammon; Heidi Hofer; Gregory M. Yaxley; Andrew J Berry; Alan B. Woodland; Prok  Vasilyev; D Graham Pearson

High pressure experimental investigation of the interaction between partial melts of eclogite and mantle peridotite during upwelling

Zsanett Pintér
, Anja Rosenthal
, Daniel J. Frost
, Catherine A McCammon
, Heidi Hofer
, Gregory M. Yaxley
, Andrew J Berry
, Alan B. Woodland
, Prok Vasilyev
, D Graham Pearson

Research output: Contribution to conference › Abstract

Abstract

Many mantle-derived magmas may originate through partial melting of complex, mixed mantle rocks including not only peridotite, but also oceanic crust recycled into the mantle [1,2]. There is, however, little detailed knowledge concerning how such material is produced, how it melts, the types of liquids produced and how they are extracted from the mantle.
We have conducted a series of peridotite/basalt layered experiments using an average altered mid-ocean ridge basalt GA2 [3] and fertile peridotite HZ1 [4] doped with Ir to act as a redox sensor [5,6]. Experiments were performed at 3-10 GPa, 1235-1660°C, using a multi anvil apparatus.

The compositions of minerals and melts were analysed using an electron microprobe. Fourier-transform infrared and Mössbauer spectroscopy were also employed to determine the concentrations of small amounts of volatiles and the Fe3+/ΣFe ratio, respectively.

Experiments yielded well-crystallised heterogeneous mantle assemblages. Similar to previous studies [3,7], ‘dry’ eclogite starts to melt at higher depths than ambient ‘dry’ mantle along adiabatic paths. Highly siliceous melts produced through near-adiabatic ascent freeze into ambient peridotite, forming distinct orthopyroxene-rich reaction zones [8].

We demonstrate that impregnating partial melts of eclogite in an upwelling mantle differ in their metasomatic effects depending on the particular adiabatic path, as suggested previously [7]. Thus, melt compositions formed by subsequent re-melting of such metasomatic assemblages strongly depend on potential temperature of the adiabat [7].

[1] Hofmann et al. Treatise Geochem 2, 2.03, 61-101 (2003) [2] Sobolev et al. Science 316, 412-417 (2007) [3] Spandler et al. J Petrol 49, 771-795 (2008) [4] Green et al. Nature 467, 448-451 (2010) [5] Stagno et al. Nature 493, 84-88 (2013) [6] Stagno et al. Contrib Mineral Petrol 169:16 (2015) [7] Rosenthal et al. Sci Rep 4, 6099 (2014) [8] Yaxley & Green Schweiz Mineral Petrogr Mitt 78, 243-255 (1998)

Original language	English
Number of pages	1
Publication status	Published - 2015
Externally published	Yes
Event	Fall Meeting of the American-Geophysical-Union 2008 - San Francisco, United States of America Duration: 15 Dec 2008 → 19 Dec 2008

Conference

Conference	Fall Meeting of the American-Geophysical-Union 2008
Abbreviated title	AGU 2008
Country/Territory	United States of America
City	San Francisco
Period	15/12/08 → 19/12/08

Access to Document

https://agu.confex.com/agu/fm15/webprogram/Paper69063.html

Cite this

Pintér, Z., Rosenthal, A., Frost, D. J., McCammon, C. A., Hofer, H., Yaxley, G. M., Berry, A. J., Woodland, A. B., Vasilyev, P., & Pearson, D. G. (2015). High pressure experimental investigation of the interaction between partial melts of eclogite and mantle peridotite during upwelling. Abstract from Fall Meeting of the American-Geophysical-Union 2008, San Francisco, California, United States of America. https://agu.confex.com/agu/fm15/webprogram/Paper69063.html

@conference{e2515a6a82774356a67f0e7493ee47e7,

title = "High pressure experimental investigation of the interaction between partial melts of eclogite and mantle peridotite during upwelling",

abstract = "Many mantle-derived magmas may originate through partial melting of complex, mixed mantle rocks including not only peridotite, but also oceanic crust recycled into the mantle [1,2]. There is, however, little detailed knowledge concerning how such material is produced, how it melts, the types of liquids produced and how they are extracted from the mantle. We have conducted a series of peridotite/basalt layered experiments using an average altered mid-ocean ridge basalt GA2 [3] and fertile peridotite HZ1 [4] doped with Ir to act as a redox sensor [5,6]. Experiments were performed at 3-10 GPa, 1235-1660°C, using a multi anvil apparatus. The compositions of minerals and melts were analysed using an electron microprobe. Fourier-transform infrared and M{\"o}ssbauer spectroscopy were also employed to determine the concentrations of small amounts of volatiles and the Fe3+/ΣFe ratio, respectively. Experiments yielded well-crystallised heterogeneous mantle assemblages. Similar to previous studies [3,7], {\textquoteleft}dry{\textquoteright} eclogite starts to melt at higher depths than ambient {\textquoteleft}dry{\textquoteright} mantle along adiabatic paths. Highly siliceous melts produced through near-adiabatic ascent freeze into ambient peridotite, forming distinct orthopyroxene-rich reaction zones [8]. We demonstrate that impregnating partial melts of eclogite in an upwelling mantle differ in their metasomatic effects depending on the particular adiabatic path, as suggested previously [7]. Thus, melt compositions formed by subsequent re-melting of such metasomatic assemblages strongly depend on potential temperature of the adiabat [7]. [1] Hofmann et al. Treatise Geochem 2, 2.03, 61-101 (2003) [2] Sobolev et al. Science 316, 412-417 (2007) [3] Spandler et al. J Petrol 49, 771-795 (2008) [4] Green et al. Nature 467, 448-451 (2010) [5] Stagno et al. Nature 493, 84-88 (2013) [6] Stagno et al. Contrib Mineral Petrol 169:16 (2015) [7] Rosenthal et al. Sci Rep 4, 6099 (2014) [8] Yaxley \& Green Schweiz Mineral Petrogr Mitt 78, 243-255 (1998)",

author = "Zsanett Pint{\'e}r and Anja Rosenthal and Frost, \{Daniel J.\} and McCammon, \{Catherine A\} and Heidi Hofer and Yaxley, \{Gregory M.\} and Berry, \{Andrew J\} and Woodland, \{Alan B.\} and Prok Vasilyev and Pearson, \{D Graham\}",

year = "2015",

language = "English",

note = "Fall Meeting of the American-Geophysical-Union 2008, AGU 2008 ; Conference date: 15-12-2008 Through 19-12-2008",

}

Pintér, Z, Rosenthal, A, Frost, DJ, McCammon, CA, Hofer, H, Yaxley, GM, Berry, AJ, Woodland, AB, Vasilyev, P & Pearson, DG 2015, 'High pressure experimental investigation of the interaction between partial melts of eclogite and mantle peridotite during upwelling', Fall Meeting of the American-Geophysical-Union 2008, San Francisco, United States of America, 15/12/08 - 19/12/08. <https://agu.confex.com/agu/fm15/webprogram/Paper69063.html>

High pressure experimental investigation of the interaction between partial melts of eclogite and mantle peridotite during upwelling. / Pintér, Zsanett; Rosenthal, Anja; Frost, Daniel J. et al.
2015. Abstract from Fall Meeting of the American-Geophysical-Union 2008, San Francisco, California, United States of America.

Research output: Contribution to conference › Abstract

TY - CONF

T1 - High pressure experimental investigation of the interaction between partial melts of eclogite and mantle peridotite during upwelling

AU - Pintér, Zsanett

AU - Rosenthal, Anja

AU - Frost, Daniel J.

AU - McCammon, Catherine A

AU - Hofer, Heidi

AU - Yaxley, Gregory M.

AU - Berry, Andrew J

AU - Woodland, Alan B.

AU - Vasilyev, Prok

AU - Pearson, D Graham

PY - 2015

Y1 - 2015

N2 - Many mantle-derived magmas may originate through partial melting of complex, mixed mantle rocks including not only peridotite, but also oceanic crust recycled into the mantle [1,2]. There is, however, little detailed knowledge concerning how such material is produced, how it melts, the types of liquids produced and how they are extracted from the mantle. We have conducted a series of peridotite/basalt layered experiments using an average altered mid-ocean ridge basalt GA2 [3] and fertile peridotite HZ1 [4] doped with Ir to act as a redox sensor [5,6]. Experiments were performed at 3-10 GPa, 1235-1660°C, using a multi anvil apparatus. The compositions of minerals and melts were analysed using an electron microprobe. Fourier-transform infrared and Mössbauer spectroscopy were also employed to determine the concentrations of small amounts of volatiles and the Fe3+/ΣFe ratio, respectively. Experiments yielded well-crystallised heterogeneous mantle assemblages. Similar to previous studies [3,7], ‘dry’ eclogite starts to melt at higher depths than ambient ‘dry’ mantle along adiabatic paths. Highly siliceous melts produced through near-adiabatic ascent freeze into ambient peridotite, forming distinct orthopyroxene-rich reaction zones [8]. We demonstrate that impregnating partial melts of eclogite in an upwelling mantle differ in their metasomatic effects depending on the particular adiabatic path, as suggested previously [7]. Thus, melt compositions formed by subsequent re-melting of such metasomatic assemblages strongly depend on potential temperature of the adiabat [7]. [1] Hofmann et al. Treatise Geochem 2, 2.03, 61-101 (2003) [2] Sobolev et al. Science 316, 412-417 (2007) [3] Spandler et al. J Petrol 49, 771-795 (2008) [4] Green et al. Nature 467, 448-451 (2010) [5] Stagno et al. Nature 493, 84-88 (2013) [6] Stagno et al. Contrib Mineral Petrol 169:16 (2015) [7] Rosenthal et al. Sci Rep 4, 6099 (2014) [8] Yaxley & Green Schweiz Mineral Petrogr Mitt 78, 243-255 (1998)

AB - Many mantle-derived magmas may originate through partial melting of complex, mixed mantle rocks including not only peridotite, but also oceanic crust recycled into the mantle [1,2]. There is, however, little detailed knowledge concerning how such material is produced, how it melts, the types of liquids produced and how they are extracted from the mantle. We have conducted a series of peridotite/basalt layered experiments using an average altered mid-ocean ridge basalt GA2 [3] and fertile peridotite HZ1 [4] doped with Ir to act as a redox sensor [5,6]. Experiments were performed at 3-10 GPa, 1235-1660°C, using a multi anvil apparatus. The compositions of minerals and melts were analysed using an electron microprobe. Fourier-transform infrared and Mössbauer spectroscopy were also employed to determine the concentrations of small amounts of volatiles and the Fe3+/ΣFe ratio, respectively. Experiments yielded well-crystallised heterogeneous mantle assemblages. Similar to previous studies [3,7], ‘dry’ eclogite starts to melt at higher depths than ambient ‘dry’ mantle along adiabatic paths. Highly siliceous melts produced through near-adiabatic ascent freeze into ambient peridotite, forming distinct orthopyroxene-rich reaction zones [8]. We demonstrate that impregnating partial melts of eclogite in an upwelling mantle differ in their metasomatic effects depending on the particular adiabatic path, as suggested previously [7]. Thus, melt compositions formed by subsequent re-melting of such metasomatic assemblages strongly depend on potential temperature of the adiabat [7]. [1] Hofmann et al. Treatise Geochem 2, 2.03, 61-101 (2003) [2] Sobolev et al. Science 316, 412-417 (2007) [3] Spandler et al. J Petrol 49, 771-795 (2008) [4] Green et al. Nature 467, 448-451 (2010) [5] Stagno et al. Nature 493, 84-88 (2013) [6] Stagno et al. Contrib Mineral Petrol 169:16 (2015) [7] Rosenthal et al. Sci Rep 4, 6099 (2014) [8] Yaxley & Green Schweiz Mineral Petrogr Mitt 78, 243-255 (1998)

M3 - Abstract

T2 - Fall Meeting of the American-Geophysical-Union 2008

Y2 - 15 December 2008 through 19 December 2008

ER -