Stratigraphical and δ13C records of Permo-Carboniferous platform carbonates, South China: Responses to late Paleozoic icehouse climate and icehouse–greenhouse transition
Stratigraphical and δ13C records of Permo-Carboniferous platform carbonates, South China: Responses to late Paleozoic icehouse climate and icehouse–greenhouse transition
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华南二叠纪-石炭系台地碳酸盐地层和δ13C记录：对晚古生代冰室气候和冰室-温室转变的响应
DOI：
10.1016/j.palaeo.2016.07.038
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发表时间：
2017-05
期刊：
影响因子：
--
通讯作者：
Yuansheng Du
中科院分区：
文献类型：
--
作者：
Chao Liu;Emilia Jarochowska;Yuansheng Du
晚古生代冰期在赤道东古特提斯的地层印记一直没有引起足够的重视。对巴马台地贡川剖面的宾夕法尼亚-中瓜达卢普统碳酸盐岩进行了生物地层、微相和稳定碳同位素地层学的综合研究。它记录了7个冷却和两个温暖的脉冲在前昆古阶的时间间隔，比较近冰地层记录和远场间接代理在低纬度地区。仅在亚赤道带记录到一个昆古阶负δ 13 C偏移（从昆古阶底部的+ 4.4‰到+ 1.6‰）。随后，全球正δ 13 C趋势在Cisuralian-Guadalupian边界附近达到+5.3 ‰。首次报道了昆古尔阶层序中的7个三级浅化旋回。每个周期的持续时间估计约为。1百万卢比。这些周期被解释为冰川海平面的起源，主要是由长期调制的盐度（约1.2万年）majorpCO 2下降的条件下。这种解释得到了最近的气候冰盖建模和新生代冰川研究的支持，这些研究认为，当只有局部的冰中心存在时，天文强迫将被碳循环中的大幅度扰动放大。我们的研究结果强调，需要整合沉积学和古气候学代理阐明晚古生代冰期的冰消期的动态。
Little attention has been focused on the stratigraphical imprints of the Late Paleozoic Ice Age on the equatorial eastern Paleo-Tethys. An integrated study of biostratigraphy, microfacies, and stable carbon isotope stratigraphy was carried out on Pennsylvanian–middle Guadalupian carbonates of the Gongchuan section in the Bama Platform, South China. It records seven cooling and two warming pulses in the pre-Kungurian interval, comparing with ice-proximal stratigraphical records and far-field indirect proxies in lower latitudes. A Kungurian negative δ13C excursion (from + 4.4‰ at the base of the Kungurian to + 1.6‰) recorded only in the subequatorial belt is documented here. It is followed by a global positive δ13C trend reaching + 5.3‰ near the Cisuralian–Guadalupian boundary. Seven third-order shallowing–upward cycles are reported for the first time from the Kungurian succession. The duration of each cycle is estimated to ca. 1 myr. These cycles are interpreted as being of glacioeustatic origin and mainly driven by long-period modulations of obliquity (~ 1.2 myr) under majorpCO2decreasing condition. This interpretation is supported by recent climate–ice sheet modeling and Cenozoic glaciation studies, which argue that astronomical forcing will be amplified by large-magnitude perturbations in the carbon cycle, when only localized ice-centers persist. Our results emphasize the need for integration of sedimentological and paleoclimatological proxies in elucidating the dynamics of the deglacial phases of the Late Paleozoic Ice Age.
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影响因子：
--
作者：
Shi Xiao-ying
通讯作者：
Shi Xiao-ying
DOI：
10.1127/0077-7749/2013/0328
发表时间：
2013-06
影响因子：
0.8
作者：
C. Okuyucu
通讯作者：
C. Okuyucu
DOI：
10.1016/j.palaeo.2015.10.014
发表时间：
2015-12
期刊：
Palaeogeography, Palaeoclimatology, Palaeoecology
影响因子：
--
作者：
Q. Fang;Huaichun Wu;L. Hinnov;X. Jing;Xunlian Wang;Q. Jiang
通讯作者：
Q. Fang;Huaichun Wu;L. Hinnov;X. Jing;Xunlian Wang;Q. Jiang
影响因子：
6.1
作者：
J. Isbell;Lindsey C. Henry;E. Gulbranson;C. Limarino;M. Fraiser;Zelenda J. Koch;Patricia L. Ciccioli;Ashley A. Dineen
通讯作者：
J. Isbell;Lindsey C. Henry;E. Gulbranson;C. Limarino;M. Fraiser;Zelenda J. Koch;Patricia L. Ciccioli;Ashley A. Dineen
DOI：
--
发表时间：
1962
期刊：
--
影响因子：
--
作者：
R. J. Dunham
通讯作者：
R. J. Dunham