中文摘要：

与 Nd 同位素和从 Yangtze 块的北边缘的 Phanerozoic 碎屑状的沉积的另外的 geochemical 特征一起的瞬间同位素被 MC-ICP-MS 和一些另外的技术分析，跨越时期从对侏罗记寒武纪。δ ⁹⁸ 瞬间价值和 ε _{在这些 sedimets 的 Nd} (t) 被观察展出变化的一个大范围(−0.65 ‰ 2 +1.87 ‰， −1.46 −10.90，分别地) 。明确地，从晚二叠的 Maokou 形成的样品在两 δ ⁹⁸ 瞬间和 ε _Nd (t)(+0.97 ‰， −1.46，分别地) 。这些提高的价值被建议联系到 H ₂ S 和 HS ⁻ 进由 Emeishan 披风羽毛的暴烈的爆发的同时期的海水。这些硫化物气体的介绍将引起哞 ₄²⁻ 被变成作为瞬间 ₄²⁻ 并且这样赞成重瞬间同位素的优先的免职离开积极瞬间同位素价值的瞬间 ₄²⁻, 。从晚二叠的 Changxing 形成的样品有显著地提高的δ ⁹⁸ +1.87 ‰的瞬间价值，与相对否定的ε _Nd (t)( −10.90 )和遗体 TOC 和总数的相对更高的内容硫( TS )(1.52%，2.02%，分别地)。这在 Changxing 时期期间推断提高的主要生产率和高器官的埋葬的存在。HS ⁻ 和 H ₂ 由减少硫酸盐的反应的 S 导致了提高的海水 δ ⁹⁸ 瞬间价值在 Changxing 时期期间。初步的 Phanerozoic 数据这里报导了允许我们建议在减少的沉积保存的瞬间同位素签名与地区性的构造设置和联系环境条件有关，并且这样 δ ⁹⁸ 瞬间地球历史上在 paleoenvironmental 事件的进化上支持我们的理解。

英文摘要：

Mo isotopes along with Nd isotopes and other geochemical characteristics of the Phanerozoic clastic sediments from the northern margin of the Yangtze block were analyzed by MC-ICP-MS and some other techniques, spanning the period from Cambrian to Jurassic. The δ^98Mo values and εNd（t） in these sedimets were observed to exhibit a large range of variation （-0.65‰-＋1.87‰, -1.46--10.90, respectively）. Specifically, the sample from Late Permian Maokou Formation has relatively positive values in both δ^98Mo and εNd（t） （＋0.97‰, -1.46, respectively）. These elevated values are proposed to relate to the input of a large quantity of H2S and HS into the contemporaneous seawater by the volcanic eruption of the Emeishan mantle plume. Introduction of these sulfide gases would cause MoO4^2-to be transferred into MoS4^2-, favoring the preferential deposition of the heavy Mo isotope as MoS4^2- and thus leaving a positive Mo isotope value. The sample from Late Permian Changxing Formation has a significantly elevated δ^98Mo value of ＋1.87‰, in association with the relatively negative εNd（t） （-10.90） and remain the relatively higher content of both TOC and total sulfur （TS） （1.52%, 2.02%, respectively）. This infers the presence of the enhanced primary productivity and high organic burial during the Changxing pe- riod. The production of a huge quantity of HS- and H2S by the sulfate-reducing reaction led to the existence of the elevated seawater δ^98Mo values during the Changxing period. The preliminary Phanerozoic data reported here allow us to propose that the Mo isotope signature preserved in reductive sediments is related to the regional tectonic settings and the associated environmental conditions, and thus the measurement of δ^98Mo promotes our understanding on the evolution of the paleoenvironmental event in the Earth history.