The isotopic composition of sedimentary sulfur through time
The isotopic composition of sedimentary sulfur through time
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DOI：
10.1016/s0031-0182(97)00067-9
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发表时间：
1997-08
期刊：
影响因子：
--
通讯作者：
H. Strauss
中科院分区：
文献类型：
--
作者：
H. Strauss
我们对沉积硫的同位素组成及其随时间演化的认识是基于对海洋蒸发硫酸盐矿床和沉积黄铁矿的研究，后者主要是由细菌硫酸盐还原形成的。传统上，它们的同位素记录被用来模拟和解释地球上的全球硫循环。从高分辨率同位素地层学的现代概念出发，对显生界和新元古代现有硫同位素资料的意义、潜力和局限性进行了批判性评价。总的来说，硫酸盐和硫化物同位素记录需要进一步的系统研究，特别是为了改善结果的不充分和不规则的时间间隔。沉积硫化物的硫同位素研究在时间边界上的潜力相当有限。通常情况下，局部沉积和/或成岩作用似乎凌驾于潜在的全球信号之上。
Our knowledge of the isotopic composition of sedimentary sulfur and its evolution through time is based on the studies of marine evaporitic sulfate deposits and sedimentary pyrite, the latter mostly formed as a result of bacterial sulfate reduction. Traditionally, their isotope records have been utilized to model and interpret the global sulfur cycle on Earth. The significance, potential and limitations of the presently available sulfur isotope data for the Phanerozoic and the Neoproterozoic with respect to modern concepts of high-resolution isotope stratigraphy are critically evaluated. In general, the sulfate and sulfide isotope records require further systematic research, particularly in order to improve the inadequate, irregular time spacing of results. The potential of sulfur isotopic investigations of sedimentary sulfides from time boundaries is rather limited. Frequently, local depositional and/or diagenetic effects appear to dominate over potentially present global signals.