A multiple sulfur record of super-large volcanic eruptions in Archaean pyrite nodules
A multiple sulfur record of super-large volcanic eruptions in Archaean pyrite nodules
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太古宙黄铁矿结核超大型火山喷发的多次硫记录
DOI：
10.1016/j.epsl.2022.117737
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发表时间：
2022
影响因子：
5.3
通讯作者：
Bekker, Andrey
中科院分区：
文献类型：
--
作者：
Agangi, Andrea;Hofmann, Axel;Eickmann, Benjamin;Ossa Ossa, Frantz;Tyler, Perinne;Wing, Boswell;Bekker, Andrey
大洋表壳岩携带的质量独立分馏的S，被解释为来自紫外线诱导的光化学反应在缺氧的气氛中的记录。SO2气体的光化学反应实验为这些过程提供了一些认识.然而，调和实验结果与多个S同位素组成的沉积记录已被证明是困难的，并代表了一个突出的问题，在理解的表层S-循环。我们提出了四重硫同位素数据（32 S，33 S，34 S，36 S）的黄铁矿中太古代碳质沉积物的自治领集团，南非，沉积在酸性火山湖，这有助于调和的意见，从南海的沉积记录与光化学实验的结果。数据显示，Δ 33 S/δ 34 S比值较低，（大部分为Δ 36 S/Δ 33 S比值）和非常负值（-4及更低），与大多数太古代沉积硫化物和硫酸盐的成分形成鲜明对比，其Δ 36 S/Δ 33 S-1（所谓的“大气参考阵列”），但与平流层中产生的现代光化学硫酸盐气溶胶相匹配，在超大型火山爆发后，并保存在南极冰中。这些数据也与变气压下SO2气体的紫外辐照实验结果一致。硫同位素组成的自治领组黄铁矿在这里解释，以反映在一个低氧水平的大气中，在高SO2压力在大型火山爆发，混合有大洋“背景”（具有大致类似的组成大洋参考阵列）S池的光解产物。据推测，在陆地盆地的高沉积速率导致在短暂的沉积间隔，这忠实地代表了瞬态的光化学信号相比，海洋沉积记录在瞬间捕获输入的大气S。
Archaean supracrustal rocks carry a record of mass-independently fractionated S that is interpreted to be derived from UV-induced photochemical reactions in an oxygen-deficient atmosphere. Experiments with photochemical reactions of SO 2 gas have provided some insight into these processes. However, reconciling experimental results with the multiple S isotopic composition of the Archaean sedimentary record has proven difficult and represents one of the outstanding issues in understanding the Archaean surface S-cycle. We present quadruple S isotope data (32 S, 33 S, 34 S, 36 S) for pyrite from Mesoarchaean carbonaceous sediments of the Dominion Group, South Africa, deposited in an acidic volcanic lake, which help reconcile observations from the Archaean sedimentary record with the results of photochemical experiments. The data, which show low Δ 33 S/δ 34 S ratios (mostly≪ 1) and very negative Δ 36 S/Δ 33 S ratios (− 4 and lower), contrast with the composition of most Archaean sedimentary sulfides and sulfates, having Δ 36 S/Δ 33 S∼− 1 (the so-called ‘Archaean reference array’), but match those of modern photochemical sulfate aerosols produced in the stratosphere, following super-large volcanic eruptions, and preserved in Antarctic ice. These data are also consistent with the results of UV-irradiation experiments of SO 2 gas at variable gas pressure. The S isotope composition of the Dominion Group pyrite is here interpreted to reflect the products of photolysis in a low-oxygen-level atmosphere at high SO 2 pressure during large volcanic eruptions, mixed with Archaean ‘background’(having a composition broadly similar to the Archaean reference array) S pools. It is inferred that high sedimentation rates in a terrestrial basin resulted in an instantaneously trapped input of atmospheric S during short-lasted depositional intervals, which faithfully represents transient photochemical signals in comparison with marine sedimentary records.
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第32章-火山羽流
影响因子：
1.2
作者：
S. Carey
通讯作者：
S. Carey
南非卡普瓦尔克拉通中太古代威特沃特斯兰德和文特斯多普超群金质砾岩中沉积“铅弹”黄铁矿的硫源
影响因子：
4.8
作者：
B. Guy;Shuhei Ono;J. Gutzmer;Y. Lin;Y. Lin;N. Beukes
通讯作者：
N. Beukes
晚太古代火山沉积Dominion群的回顾及其对南非Witwatersrand超群构造环境的影响
DOI：
--
发表时间：
1992
期刊：
影响因子：
--
作者：
M. C. Jackson
通讯作者：
M. C. Jackson
Dominion 群和 Pongola 群底部前寒武纪古土壤的化学和矿物学（南非德兰士瓦）
影响因子：
3.8
作者：
D. Grandstaff;M. Edelman;R. Foster;E. Zbinden;M. M. Kimberley
通讯作者：
M. M. Kimberley
斯威士兰巴伯顿绿岩带隆多齐古太古代热液系统中大气硫的改造
影响因子：
3.8
作者：
D. Roerdink;P. Mason;M. Whitehouse;F. Brouwer
通讯作者：
F. Brouwer