Re-Os isotopes of sulfides in mantle xenoliths from eastern China : Progressive modification of lithospheric mantle

Xisheng XU*, William L. GRIFFIN, Suzanne Y. O'REILLY, Norman J. PEARSON, Hongyan GENG, Jianping ZHENG

*Corresponding author for this work

Research output: Journal PublicationsJournal Article (refereed)Researchpeer-review

93 Citations (Scopus)

Abstract

In situ Re-Os isotopic data for sulfide grains in mantle-derived peridotite xenoliths from eastern China demonstrate a close temporal linkage between crustal tectonism and fluid-migration events in the subcontinental lithospheric mantle (SCLM). In the Cathaysia block, TRD and TMA ages of sulfides with 187Re/188Os < 0.11 cluster in four groups: Paleoproterozoic (∼ 1.8), Mesoproterozoic (∼ 1.3 to 1.5 Ga) and Neoproterozoic (0.9 Ga and 0.6 Ga), corresponding to known major crustal growth events. In the Sino-Korean block, the most robust TRD and TMA ages from sulfides, and some published whole-rock data, indicate that the earliest SCLM formed together with the oldest Archean crust and was modified in Paleoproterozoic time (ca 1.8 Ga), corresponding to the collision between the eastern and western parts of the block. Meso- to Neoproterozoic ages (ca 1.4 Ga, 0.9 Ga, 0.6 Ga) record younger thermal events, the latest of which also is known from zircon ages in lower-crustal xenoliths. The scarcity of Archean sulfide- and whole-rock model ages may reflect widespread Proterozoic modification of the SCLM, but may also be due to preferential sampling of young SCLM by volcanoes situated along zones of asthenospheric upwelling, controlled by a network of major shear zones. Widespread Mesozoic magmatism in the Cathaysia block may be represented by abundant mantle sulfides with mildly superchondritic 187Os/188Os and "future" model ages. This would imply that the sublithospheric mantle has developed a superchondritic Re/Os over perhaps the last 1 Ga, requiring its isolation from the convecting asthenosphere. The SCLM beneath eastern China has had a very complex history, and is now a mixture of refractory and fertile mantle domains with different ages, modified during a number of events.

Original languageEnglish
Pages (from-to)43-64
Number of pages22
JournalLithos
Volume102
Issue number1-2
Early online date27 Jun 2007
DOIs
Publication statusPublished - Apr 2008
Externally publishedYes

Fingerprint

Sulfides
Isotopes
sulfide
isotope
mantle
Rocks
Volcanoes
Archean
Refractory materials
Sampling
Fluids
asthenosphere
peridotite
rock
shear zone
magmatism
Proterozoic
upwelling
zircon
volcano

Keywords

  • Eastern China lithospheric mantle
  • Mantle sulfides
  • Os isotopes
  • Re-Os mantle ages

Cite this

XU, Xisheng ; GRIFFIN, William L. ; O'REILLY, Suzanne Y. ; PEARSON, Norman J. ; GENG, Hongyan ; ZHENG, Jianping. / Re-Os isotopes of sulfides in mantle xenoliths from eastern China : Progressive modification of lithospheric mantle. In: Lithos. 2008 ; Vol. 102, No. 1-2. pp. 43-64.
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abstract = "In situ Re-Os isotopic data for sulfide grains in mantle-derived peridotite xenoliths from eastern China demonstrate a close temporal linkage between crustal tectonism and fluid-migration events in the subcontinental lithospheric mantle (SCLM). In the Cathaysia block, TRD and TMA ages of sulfides with 187Re/188Os < 0.11 cluster in four groups: Paleoproterozoic (∼ 1.8), Mesoproterozoic (∼ 1.3 to 1.5 Ga) and Neoproterozoic (0.9 Ga and 0.6 Ga), corresponding to known major crustal growth events. In the Sino-Korean block, the most robust TRD and TMA ages from sulfides, and some published whole-rock data, indicate that the earliest SCLM formed together with the oldest Archean crust and was modified in Paleoproterozoic time (ca 1.8 Ga), corresponding to the collision between the eastern and western parts of the block. Meso- to Neoproterozoic ages (ca 1.4 Ga, 0.9 Ga, 0.6 Ga) record younger thermal events, the latest of which also is known from zircon ages in lower-crustal xenoliths. The scarcity of Archean sulfide- and whole-rock model ages may reflect widespread Proterozoic modification of the SCLM, but may also be due to preferential sampling of young SCLM by volcanoes situated along zones of asthenospheric upwelling, controlled by a network of major shear zones. Widespread Mesozoic magmatism in the Cathaysia block may be represented by abundant mantle sulfides with mildly superchondritic 187Os/188Os and {"}future{"} model ages. This would imply that the sublithospheric mantle has developed a superchondritic Re/Os over perhaps the last 1 Ga, requiring its isolation from the convecting asthenosphere. The SCLM beneath eastern China has had a very complex history, and is now a mixture of refractory and fertile mantle domains with different ages, modified during a number of events.",
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Re-Os isotopes of sulfides in mantle xenoliths from eastern China : Progressive modification of lithospheric mantle. / XU, Xisheng; GRIFFIN, William L.; O'REILLY, Suzanne Y.; PEARSON, Norman J.; GENG, Hongyan; ZHENG, Jianping.

In: Lithos, Vol. 102, No. 1-2, 04.2008, p. 43-64.

Research output: Journal PublicationsJournal Article (refereed)Researchpeer-review

TY - JOUR

T1 - Re-Os isotopes of sulfides in mantle xenoliths from eastern China : Progressive modification of lithospheric mantle

AU - XU, Xisheng

AU - GRIFFIN, William L.

AU - O'REILLY, Suzanne Y.

AU - PEARSON, Norman J.

AU - GENG, Hongyan

AU - ZHENG, Jianping

PY - 2008/4

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N2 - In situ Re-Os isotopic data for sulfide grains in mantle-derived peridotite xenoliths from eastern China demonstrate a close temporal linkage between crustal tectonism and fluid-migration events in the subcontinental lithospheric mantle (SCLM). In the Cathaysia block, TRD and TMA ages of sulfides with 187Re/188Os < 0.11 cluster in four groups: Paleoproterozoic (∼ 1.8), Mesoproterozoic (∼ 1.3 to 1.5 Ga) and Neoproterozoic (0.9 Ga and 0.6 Ga), corresponding to known major crustal growth events. In the Sino-Korean block, the most robust TRD and TMA ages from sulfides, and some published whole-rock data, indicate that the earliest SCLM formed together with the oldest Archean crust and was modified in Paleoproterozoic time (ca 1.8 Ga), corresponding to the collision between the eastern and western parts of the block. Meso- to Neoproterozoic ages (ca 1.4 Ga, 0.9 Ga, 0.6 Ga) record younger thermal events, the latest of which also is known from zircon ages in lower-crustal xenoliths. The scarcity of Archean sulfide- and whole-rock model ages may reflect widespread Proterozoic modification of the SCLM, but may also be due to preferential sampling of young SCLM by volcanoes situated along zones of asthenospheric upwelling, controlled by a network of major shear zones. Widespread Mesozoic magmatism in the Cathaysia block may be represented by abundant mantle sulfides with mildly superchondritic 187Os/188Os and "future" model ages. This would imply that the sublithospheric mantle has developed a superchondritic Re/Os over perhaps the last 1 Ga, requiring its isolation from the convecting asthenosphere. The SCLM beneath eastern China has had a very complex history, and is now a mixture of refractory and fertile mantle domains with different ages, modified during a number of events.

AB - In situ Re-Os isotopic data for sulfide grains in mantle-derived peridotite xenoliths from eastern China demonstrate a close temporal linkage between crustal tectonism and fluid-migration events in the subcontinental lithospheric mantle (SCLM). In the Cathaysia block, TRD and TMA ages of sulfides with 187Re/188Os < 0.11 cluster in four groups: Paleoproterozoic (∼ 1.8), Mesoproterozoic (∼ 1.3 to 1.5 Ga) and Neoproterozoic (0.9 Ga and 0.6 Ga), corresponding to known major crustal growth events. In the Sino-Korean block, the most robust TRD and TMA ages from sulfides, and some published whole-rock data, indicate that the earliest SCLM formed together with the oldest Archean crust and was modified in Paleoproterozoic time (ca 1.8 Ga), corresponding to the collision between the eastern and western parts of the block. Meso- to Neoproterozoic ages (ca 1.4 Ga, 0.9 Ga, 0.6 Ga) record younger thermal events, the latest of which also is known from zircon ages in lower-crustal xenoliths. The scarcity of Archean sulfide- and whole-rock model ages may reflect widespread Proterozoic modification of the SCLM, but may also be due to preferential sampling of young SCLM by volcanoes situated along zones of asthenospheric upwelling, controlled by a network of major shear zones. Widespread Mesozoic magmatism in the Cathaysia block may be represented by abundant mantle sulfides with mildly superchondritic 187Os/188Os and "future" model ages. This would imply that the sublithospheric mantle has developed a superchondritic Re/Os over perhaps the last 1 Ga, requiring its isolation from the convecting asthenosphere. The SCLM beneath eastern China has had a very complex history, and is now a mixture of refractory and fertile mantle domains with different ages, modified during a number of events.

KW - Eastern China lithospheric mantle

KW - Mantle sulfides

KW - Os isotopes

KW - Re-Os mantle ages

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DO - 10.1016/j.lithos.2007.06.010

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JO - Lithos

JF - Lithos

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