Geochronological and geochemical constraints on Late Cryogenian to Early Ediacaran magmatic rocks on the northern Tarim Craton : implications for tectonic setting and affinity with Gondwana. / Xiao, Yang; Wu, Guanghui; Vandyk, Thomas Matthew; You, Lingxia.

In: International Geology Review, 01.03.2019, p. 1-18.

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Geochronological and geochemical constraints on Late Cryogenian to Early Ediacaran magmatic rocks on the northern Tarim Craton : implications for tectonic setting and affinity with Gondwana. / Xiao, Yang; Wu, Guanghui; Vandyk, Thomas Matthew; You, Lingxia.

In: International Geology Review, 01.03.2019, p. 1-18.

Research output: Contribution to journalArticle

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@article{8cc94dab43ce4a83882d4c0f299c7cd5,
title = "Geochronological and geochemical constraints on Late Cryogenian to Early Ediacaran magmatic rocks on the northern Tarim Craton: implications for tectonic setting and affinity with Gondwana",
abstract = "The Tarim Craton provides a geologic record of both the fragmentation of the Rodinian supercontinent and the subsequent assembly of Gondwana. However, the timing and interactions of these radically different tectonic processes remains contested. A critical part of this debate revolves around the late Cryogenian-Ediacaran igneous rocks along the Craton’s northern margin, specifically, whether they record super-plume related Rodinian breakup or Gondwanan orogeny. To address this issue, we present zircon U-Pb-Hf isotopic data and whole rock geochemistry from late Cryogenian to early Ediacaran granitoids of the northern Tarim Craton. U-Pb zircon ages reveal three magmatic periods along the northern Tarim margin: ca. 660 –640 Ma, 635 –625 Ma and 620 –600 Ma, associated with small scale felsic and mafic magmas. These granitoids have an A2-type affinity and are enriched in alkalines, but are depleted in Nb, Ta, Sr, P and Ti. Elemental data and generally negative εHf(t) values (-13.96 to 1.65) suggest that they were mainly derived from partial melting of enriched, subduction-modified lithospheric mantle triggered by upwelling of the asthenospheric mantle along the active continental margin of northern Tarim. We suggest that the Tarim Craton travelled as an isolated plate for much of the late Neoproterozoic, near the outer part of Rodinia and subsequently Gondwana. During this time it was affected by localized and periodic subduction-related intrusion and eruption. However, within the samples of this study, there is no U-Pb-Hf isotopic and whole rock geochemical evidence to support either super-plume related rifting (i.e. Rodinian breakup) or Pan-African orogeny (i.e. Gondwanan assembly).",
author = "Yang Xiao and Guanghui Wu and Vandyk, {Thomas Matthew} and Lingxia You",
year = "2019",
month = "3",
day = "1",
doi = "10.1080/00206814.2019.1581847",
language = "English",
pages = "1--18",
journal = "International Geology Review",
issn = "0020-6814",
publisher = "Bellwether Publishing, Ltd.",

}

RIS

TY - JOUR

T1 - Geochronological and geochemical constraints on Late Cryogenian to Early Ediacaran magmatic rocks on the northern Tarim Craton

T2 - International Geology Review

AU - Xiao,Yang

AU - Wu,Guanghui

AU - Vandyk,Thomas Matthew

AU - You,Lingxia

PY - 2019/3/1

Y1 - 2019/3/1

N2 - The Tarim Craton provides a geologic record of both the fragmentation of the Rodinian supercontinent and the subsequent assembly of Gondwana. However, the timing and interactions of these radically different tectonic processes remains contested. A critical part of this debate revolves around the late Cryogenian-Ediacaran igneous rocks along the Craton’s northern margin, specifically, whether they record super-plume related Rodinian breakup or Gondwanan orogeny. To address this issue, we present zircon U-Pb-Hf isotopic data and whole rock geochemistry from late Cryogenian to early Ediacaran granitoids of the northern Tarim Craton. U-Pb zircon ages reveal three magmatic periods along the northern Tarim margin: ca. 660 –640 Ma, 635 –625 Ma and 620 –600 Ma, associated with small scale felsic and mafic magmas. These granitoids have an A2-type affinity and are enriched in alkalines, but are depleted in Nb, Ta, Sr, P and Ti. Elemental data and generally negative εHf(t) values (-13.96 to 1.65) suggest that they were mainly derived from partial melting of enriched, subduction-modified lithospheric mantle triggered by upwelling of the asthenospheric mantle along the active continental margin of northern Tarim. We suggest that the Tarim Craton travelled as an isolated plate for much of the late Neoproterozoic, near the outer part of Rodinia and subsequently Gondwana. During this time it was affected by localized and periodic subduction-related intrusion and eruption. However, within the samples of this study, there is no U-Pb-Hf isotopic and whole rock geochemical evidence to support either super-plume related rifting (i.e. Rodinian breakup) or Pan-African orogeny (i.e. Gondwanan assembly).

AB - The Tarim Craton provides a geologic record of both the fragmentation of the Rodinian supercontinent and the subsequent assembly of Gondwana. However, the timing and interactions of these radically different tectonic processes remains contested. A critical part of this debate revolves around the late Cryogenian-Ediacaran igneous rocks along the Craton’s northern margin, specifically, whether they record super-plume related Rodinian breakup or Gondwanan orogeny. To address this issue, we present zircon U-Pb-Hf isotopic data and whole rock geochemistry from late Cryogenian to early Ediacaran granitoids of the northern Tarim Craton. U-Pb zircon ages reveal three magmatic periods along the northern Tarim margin: ca. 660 –640 Ma, 635 –625 Ma and 620 –600 Ma, associated with small scale felsic and mafic magmas. These granitoids have an A2-type affinity and are enriched in alkalines, but are depleted in Nb, Ta, Sr, P and Ti. Elemental data and generally negative εHf(t) values (-13.96 to 1.65) suggest that they were mainly derived from partial melting of enriched, subduction-modified lithospheric mantle triggered by upwelling of the asthenospheric mantle along the active continental margin of northern Tarim. We suggest that the Tarim Craton travelled as an isolated plate for much of the late Neoproterozoic, near the outer part of Rodinia and subsequently Gondwana. During this time it was affected by localized and periodic subduction-related intrusion and eruption. However, within the samples of this study, there is no U-Pb-Hf isotopic and whole rock geochemical evidence to support either super-plume related rifting (i.e. Rodinian breakup) or Pan-African orogeny (i.e. Gondwanan assembly).

U2 - 10.1080/00206814.2019.1581847

DO - 10.1080/00206814.2019.1581847

M3 - Article

SP - 1

EP - 18

JO - International Geology Review

JF - International Geology Review

SN - 0020-6814

ER -