Palaeoenvironmental change during the end-Guadalupian (Permian) mass extinction in Sichuan, China
Palaeoenvironmental change during the end-Guadalupian (Permian) mass extinction in Sichuan, China
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中国四川瓜达鲁普世（二叠纪）末期生物大灭绝期间的古环境变化
DOI：
10.1016/j.palaeo.2008.08.005
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发表时间：
2008-11
影响因子：
3
通讯作者：
Ali, J. R.
中科院分区：
文献类型：
--
作者：
Sun, Yadong;Bond, D. P. G.;John, E. H.;Wang, Wei;Lai, Xulong;Jiang, Haishui;Wignall, P. B.;Ali, J. R.
瓜德鲁普末期的大灭绝在中国西南部的四川省进行了调查。该省南部茅口组台地碳酸盐岩被峨眉山洪水玄武岩覆盖，这可能是灭绝事件的一个因素，该省北部继之以晚二叠世五家坪组浅海碳酸盐岩。灭绝事件的主要记录是褐藻纲的消失，也可能是钙质藻类物种水平的更替。高多样性的中二叠世微化石组合最后一次出现在地表下，记录了广泛的出露和岩溶作用。川北地区早在Capitanian期就出现了出露，随后的地层记录了限制性的高盐沉积，并先于厚灰层王坡层的沉积。这些中部卡皮塔尼亚的干旱条件在该阶段末期被潮湿条件所取代，这表明了广泛煤层的发展。在川南，在茅口岩溶面顶部和最古老的洪水玄武岩下方，只发育了一层薄薄的湿润煤相。瓜达鲁普期段碳酸盐记录中出现了较大的碳同位素偏移。这包括卡皮塔尼亚晚期的一个先正后负的波动，以及一个新发现的叠加在卡皮塔尼亚早期重间隔上的负峰值。这一峰值可能是一种全球现象，但其幅度（8‰）可能因相对海平面下降期间来自土壤的光和呼吸碳的贡献增加而被夸大。大量的环境因素与灭绝事件大致一致，包括回归、酸性火山作用和洪水玄武岩火山作用，这使得很难阐明每种因素的相对意义。
The end-Guadalupian mass extinction has been investigated in Sichuan province, SW China. In the south of the province the platform carbonates of the Maokou Formation are overlain by the Emeishan flood basalts, a possible factor in the extinction event, and in the north of the province the formation is succeeded by shallow-marine carbonates of the Wuchiaping Formation (Late Permian). The extinction event is primarily recorded by the loss of fusulinaceans and possibly by species-level turnover amongst calcareous algae. The high-diversity, Middle Permian microfossil assemblages are last seen beneath a surface recording widespread emergence and karstification. In northern Sichuan emergence occurred early in the Capitanian Stage and the succeeding strata record restricted hypersaline deposition that preceded the deposition of a thick ash horizon, the Wangpo Bed. These mid-Capitanian arid conditions are replaced by humid conditions towards the end of the stage as indicated by the development of a widespread coal seam. In southern Sichuan only a thin development of this humid, coaly facies is seen developed atop the Maokou karstic surface and below the oldest flood basalt. The Guadalupian interval saw the development of large C isotope excursions in the carbonate record. These include a positive-then-negative swing late in the Capitanian and a newly discovered negative spike superimposed on an early Capitanian heavy interval. This spike may be a global phenomenon but the magnitude (8‰) may have been exaggerated by an increased contribution from light, respired C derived from soils during relative sea-level fall. A plethora of environmental factors approximately coincide with the extinction event, including regression, acidic volcanism and flood basalt volcanism making it difficult to unravel the relative significance of each.
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DOI：
10.1016/j.palaeo.2004.10.009
发表时间：
2005-02
期刊：
Palaeogeography, Palaeoclimatology, Palaeoecology
影响因子：
--
作者：
P. Wignall;R. Newton;M. Brookfield
通讯作者：
P. Wignall;R. Newton;M. Brookfield
影响因子：
5.6
作者：
L. Shao;Pengfei Zhang;D. Ren;Jiajin Lei
通讯作者：
L. Shao;Pengfei Zhang;D. Ren;Jiajin Lei
影响因子：
4.9
作者：
G. Retallack;C. A. Metzger;T. Greaver;A. Jahren;Roger M. H. Smith;N. Sheldon
通讯作者：
G. Retallack;C. A. Metzger;T. Greaver;A. Jahren;Roger M. H. Smith;N. Sheldon
影响因子：
2.9
作者：
P. Wignall;R. Newton
通讯作者：
P. Wignall;R. Newton
DOI：
10.1016/0037-0738(90)90079-9
发表时间：
1985
期刊：
--
影响因子：
--
作者：
D. F. Toomey;M. H. Nitecki
通讯作者：
D. F. Toomey;M. H. Nitecki