A ca. 2.60 Ga tectono-thermal event in Western Shandong Province, North China Craton from zircon U-Pb-O isotopic evidence: Plume or convergent plate boundary process
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- 作者：Peng Rena ; Hangqiang Xiea ; Shijin Wangb ; Allen Nutmanc ; Chunyan Donga ; Shoujie Liua ; Shiwen Xiea ; Xiaochao Chea ; Zhiyong Songb ; Mingzhu Maa ; Dunyi Liua ; Yusheng Wana ; wanyusheng@bjshrimp.cn" class="auth_mail" title="E-mail the corresponding author
- 关键词：Neoarchean ; SHRIMP zircon U&ndash ; Pb dating ; O isotope in zircon ; Tectono-thermal event ; North China Craton ; Western Shandong Province
- 刊名：Precambrian Research
- 出版年：2016
- 出版时间：August 2016
- 年：2016
- 卷：281
- 期：Complete
- 页码：236-252
- 全文大小：9513 K
文摘
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Nine samples over the ancient rock belt record a regional tectono-thermal event at ∼2.6 Ga.
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2.6 Ga can be regarded as the early and late Neoarchean break in the region.
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Most of zircons, whether magmatic or metamorphic, have δ18O values of +4.5‰ to +6.5‰.
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However, a tonalite sample has metamorphic zircons with low δ18O values (+1.09‰ to +3.25‰).
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This suggests that meteoric water must be involved in the metamorphic and anatectic process.