强过铝花岗岩为前寒武纪-新生代边界生物埋藏量的增加提供了独立证据

IF 4.8 1区 地球科学 Q1 GEOLOGY
Geology Pub Date : 2024-01-01 DOI:10.1130/g51800.1
Sami Mikhail, Eva E. Stüeken, Toby J. Boocock, Megan Athey, Nick Mappin, Adrian J. Boyce, Janne Liebmann, Christopher J. Spencer, Claire E. Bucholz
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引用次数: 0

摘要

强过铝花岗岩(SPGs)是由沉积岩部分熔化产生的,因此可以提供一种新的档案,揭示地球环境史上整合硅质沉积岩岩性的长期趋势。阿新世、原生代和新生代硅质沉积岩的氮(N)含量显示了前寒武纪-新生代边界的系统性上升。磷(P)含量的同时增加也支持了这种增加。总之,这些数据最有可能的解释是,原生代晚期或新生代早期的生物量埋藏绝对值增加了约 5 至 8 倍。 前寒武纪-新生代过渡时期是地表环境逐渐富氧的时期,同时伴随着重大的生物创新,包括真核藻类崛起成为生态主导。由于富氧抑制了沉积物中生物量的保存,因此 SPGs 中保存的净生物量埋藏量的增加揭示了生物圈的扩大和整个时期初级生产的增加。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Strongly peraluminous granites provide independent evidence for an increase in biomass burial across the Precambrian–Phanerozoic boundary
Strongly peraluminous granites (SPGs) are generated by the partial melting of sedimentary rocks and can thus provide a novel archive to reveal secular trends in Earth’s environmental history that integrate siliciclastic sedimentary lithologies. The nitrogen (N) content of Archean, Proterozoic, and Phanerozoic SPGs reveals a systematic increase across the Precambrian–Phanerozoic boundary. This rise is supported by a coeval increase in the phosphorus (P) contents of SPGs. Collectively, these data are most parsimoniously explained by an absolute increase in biomass burial in the late Proterozoic or early Phanerozoic by a factor of ~5 and as much as 8. The Precambrian–Phanerozoic transition was a time of progressive oxygenation of surface environments paired with major biological innovations, including the rise of eukaryotic algae to ecological dominance. Because oxygenation suppresses biomass preservation in sediments, the increase in net biomass burial preserved in SPGs reveals an expansion of the biosphere and an increase in primary production across this interval.
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来源期刊
Geology
Geology 地学-地质学
CiteScore
10.00
自引率
3.40%
发文量
228
审稿时长
6.2 months
期刊介绍: Published since 1973, Geology features rapid publication of about 23 refereed short (four-page) papers each month. Articles cover all earth-science disciplines and include new investigations and provocative topics. Professional geologists and university-level students in the earth sciences use this widely read journal to keep up with scientific research trends. The online forum section facilitates author-reader dialog. Includes color and occasional large-format illustrations on oversized loose inserts.
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