@article{9e4f835e6c4f447fb0e8403aad20e823,
title = "The last Neoproterozoic rift magmatism on the western margin of Yangtze block, South China: New insights of Marinoan onset from low-δ18O magmatic events",
abstract = "The geological record preserves evidence of “Snowball Earth” glaciations during the Cryogenian Period, the Sturtian onset at ca. 720 Ma and the Marinoan onset at ca. 650 Ma. Compared to the Sturtian, the trigger for the Marinoan is still unclear due to the absence of large igneous provinces (LIPs). This study first discovered low-δ18O Luoluobuzi (LLBZ) granite which emplaced on the eve of the Marinoan at the Yangtze Block in South China. The granite with U-Pb age of 651.2 ± 2.1 Ma and has εHf (t) values between + 6.8 to + 13.3, and low-δ18O values between + 2.74 to + 5.34 ‰. Granite samples show Ba, Nb, Ta, Sr, Eu, and Ti depletion and enrichment in Rb, U, Th, and Pb, modeling calculations to suggest they originated from partial melting of nearby Neoproterozoic mafic rocks and formed in a continental rift. We systematically compiled data and found an interglacial period between the Sturtian-Marinoan glaciations is absent of magmatic activities. Extensional magmatic activity similar to the LLBZ granite started at ca. 651 Ma, which within errorsoverlapped the onset of the Marinoan. Such temporal ruling also existed in other worldwide rift-related magmatic activities. After combining chemical index of alteration (CIA) and palaeomagnetic results, we found the last episode of Rodinia breakup played an important role in the onset of the Marinoan.",
keywords = "Hf-O isotopes, Marinoan, Rodinia Supercontinent, Snowball Earth, U-Pb zircon age, Yangtze Block",
author = "Huang, {Chang Cheng} and Hao Zou and Chen, {Hai Feng} and Franco Pirajno and Lan, {Zhong Wu} and Yu, {Hui Dong} and Bin Xiao and Liu, {Chun Mei} and Wu, {Jiang Han} and Zhong, {Yi Jiang} and Hou, {Ming Cai}",
note = "Funding Information: The authors thank the Editor–in–Chief and two anonymous referees for their helpful comments. This study was supported by the National Natural Science Foundation of China [grant number 42272129 ], Sichuan Science and Technology Program [grant number 23NSFJQ0162 ], Department of Natural Resources of Sichuan Province [grant number 23SCZRZY-0011 ], and the Everest Scientific Research Program of Chengdu University of Technology. The authors are grateful to Dr. Meng–Qi Jin for assistance during LA–MC–ICP–MS analyses, and Prof. Qiu–Li Li, Jiao Li, and Qi Chen for their help during SIMS analyses and Prof. Xian–Hua Li for constructive comments. Funding Information: The authors thank the Editor–in–Chief and two anonymous referees for their helpful comments. This study was supported by the National Natural Science Foundation of China [grant number 42272129], Sichuan Science and Technology Program [grant number 23NSFJQ0162], Department of Natural Resources of Sichuan Province [grant number 23SCZRZY-0011], and the Everest Scientific Research Program of Chengdu University of Technology. The authors are grateful to Dr. Meng–Qi Jin for assistance during LA–MC–ICP–MS analyses, and Prof. Qiu–Li Li, Jiao Li, and Qi Chen for their help during SIMS analyses and Prof. Xian–Hua Li for constructive comments. Publisher Copyright: {\textcopyright} 2023 Elsevier B.V.",
year = "2023",
month = jun,
day = "15",
doi = "10.1016/j.precamres.2023.107037",
language = "English",
volume = "390",
journal = "Precambrian Research",
issn = "0301-9268",
publisher = "Pergamon",
}