Geochemistry of middle-late Mesozoic mafic intrusions in the eastern North China Craton: New insights on lithospheric thinning and decratonization

Date

2019-09-01

Author

Wan, Le
Zeng, Zuoxun
Kusky, Timothy
Asimow, Paul
He, Chicheng
Liu, Yongjiang
Yang, Shuang
Xu, Shaopeng

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

170
views

0
downloads

We present detailed geochronological, geochemical and Sr-Nd-Pb isotopic data for late Mesozoic mafic intrusions in the Taili region (western Liaodong Province) of the eastern North China Craton (NCC). We obtained laser-ablation inductively-coupled plasma mass spectrometry U-Pb zircon ages from lamprophyres with ages ranging from 139 to 162 Ma and diorites with dusters of ages at 226 +/- 11 Ma, 165 +/- 5.8 Ma and 140 +/- 4.8 Ma. We interpret the Triassic zircons in diorites to be inherited from the Paleo-Asian Ocean slab. Both the lamprophyres and diorites contain abundant inherited grains (2644-2456 Ma) that were likely derived from the ancient NCC basement, reflecting a contribution from old lower crustal material. Like contemporaneous late Mesozoic mafic rocks in the Jiaodong and Liaodong Peninsula areas of the NCC. the Taili lamprophyres reveal a strong subduction signature in their normalized trace element patterns, including depletion of high field strength elements and enrichment of large ion lithophile elements. The rare-earth element patterns of the Taili intermediate-mafic intrusions are best explained if they were principally derived from partial melting of amphibole-bearing lherzolite in the spinel-garnet transition zone. Slab-derived melts likely contributed to the formation of late Mesozoic mafic rocks along three margins of the craton: due to accretion of the Yangtze Block along the southern margin of the craton, subduction of the Paleo-Asian Ocean along the northern margin, and subduction of the Paleo-Pacific oceanic plate along the eastern margin of NCC. We present a synthesis of the geochemical, spatial, and temporal patterns of magmatic rocks and periods of deformation that contributed to decratonization of the NCC in response to the Mesozoic tectonic evolution of adjacent plates along its northern, southern, and eastern margins. (C) 2019 Published by Elsevier B.V. on behalf of International Association for Gondwana Research.

Subject Keywords

North China Craton, Mafic rocks, Isotope and geochemistry, Late Mesozoic, Lithospheric thinning

URI

https://hdl.handle.net/11511/68460

Journal

GONDWANA RESEARCH

DOI

https://doi.org/10.1016/j.gr.2019.04.004

Collections

Department of Geological Engineering, Article

Suggestions

OpenMETU
Core

Geological and Geochemical Evolution of the Quaternary Suphan Stratovolcano, Eastern Anatolia, Turkey: Evidence for the Lithosphere-Asthenosphere Interaction in Post-Collisional Volcanism Özdemir, Yavuz; Güleç, Nilgün Türkan (Oxford University Press (OUP), 2014-01-01) The Suphan stratovolcano is one of the major Quaternary eruption centers of post-collisional volcanism in eastern Anatolia, located in the zone of convergence between the Arabian and the Anatolian plates. We document the geological and geochemical evolution of Suphan in terms of volcanostratigraphy, geochronology (Ar-40-Ar-39), isotope composition (Sr, Nd, Pb) and bulk-rock geochemistry. Our new Ar-40-Ar-39 data, along with previously published K/Ar ages, indicate an age of 0 center dot 76-0 center dot 06 M...
Geochemistry of the post-collisional Miocene mafic Tunceli Volcanics, Eastern Turkey: Implications for the nature of the mantle source and melting systematics Aktağ, Alican; Sayıt, Kaan (2019-01-01) The East Anatolian Accretionary Complex (EAAC) comprises an ideal example of post-collisional volcanism within the Africa-Eurasia collision zone. The Miocene mafic Tuncell Volcanics, as a part of this post-collisional volcanic system, are located in the western termination of EAAC. The mafic Tunceli Volcanics are characterized by mildly alkaline and tholeiitic basalts, in which olivine, clinopyroxene and plagioclase characterize the main mineralogy. The role of fractional crystallization (FC) and assimilati...
Geochemical constraints on the Cenozoic, OIB-type alkaline volcanic rocks of NW Turkey: Implications for mantle sources and melting processes ALDANMAZ, ERCAN; KÖPRÜBAŞI, NEZİHİ; GÜRER, ÖMER FEYZİ; Kaymakcı, Nuretdin; Gourgaud, Alan (Elsevier BV, 2006-01-01) The volcanic province of North-West Turkey contains a number of intra-continental alkaline volcanic eruption sequences formed along the localized extensional basins developed in relation with the Late Cenozoic extensional processes. The volcanic suite comprises the extracted melt products of adiabatic decompression melting of the mantle that are represented by small-volume intra-continental plate volcanic rocks of alkaline olivine basalts and basanites with compositions representative of mantle-derived, pri...
GEOCHEMISTRY AND PETROGENESIS OF THE ARC-RELATED KÖSDAĞ METAVOLCANICS, SOUTHERN CENTRAL PONTIDES, NORTHERN TURKEY Berber, Faruk; Sayıt, Kaan; Department of Geological Engineering (2021-12-27) The Kösdağ Metavolcanics (KM) in the southern Central Pontides crops out between the Izmir-Ankara-Erzincan Suture Zone (IAESZ) in the south and the Sakarya Composite Terrane in the north. The unit is represented by a low-grade metamorphic assemblage including meta-basics, meta-intermediates, and meta-felsics, interlayered with recrystallized limestone, mudstone, and chert. While the unit is bounded to the north by the North Anatolian Fault Zone (NAFZ), the Dikmen Formation stratigraphically overlie the unit...
Diabase dykes from Bogazkale (Corum), Central Anatolia: Geochemical insights into the geodynamical evolution of the northern branch of Neotethys Balc, Ugur; Sayıt, Kaan (Elsevier BV, 2020-05-01) In the Bogazkale region (Corum, Central Anatolia), pieces of Neotethyan oceanic lithosphere are found in an ophiolitic melange. Within the melange, there are occurrences of isolated diabase dykes that intrude serpentinized and carbonatized ultramafics. The diabases are phaneritic, holocrystalline and equigranular, and consist of plagioclase and hornblende as the main primary mineral phases. They have all undergone low-grade alteration, to varying extents, as reflected by the presence of secondary minerals, ...

Citation Formats

L. Wan et al., “Geochemistry of middle-late Mesozoic mafic intrusions in the eastern North China Craton: New insights on lithospheric thinning and decratonization,” GONDWANA RESEARCH, pp. 153–174, 2019, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/68460.