WIDESPREAD PYRITIZATION OF INSECTS IN THE EARLY CRETACEOUS JEHOL BIOTA
WIDESPREAD PYRITIZATION OF INSECTS IN THE EARLY CRETACEOUS JEHOL BIOTA
复制标题
早白垩世热河生物群中昆虫广泛的黄化
DOI：
10.2110/palo.2012.p12-029r
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发表时间：
2012-10
期刊：
影响因子：
1.6
通讯作者：
Zheng, Daran
中科院分区：
文献类型：
--
作者：
Wang, Bo;Zhao, Fangchen;Zhang, Haichun;Fang, Yan;Zheng, Daran
摘要中国热河早白垩世生物群是一个以湖泊沉积为主的生物群，其中有丰富的无脊椎动物和脊椎动物化石。然而，其特殊保存的确切模式和性质仍不清楚。我们对中国12个下白垩统地点湖泊序列中昆虫化石的保存情况进行了调查，发现热河生物群中的许多昆虫都是由黄铁矿（后来被氧化铁假晶化）保存的。这些黄铁矿化化石仅在火山成因沉积物的湖泊沉积物中观察到。温和的沉积速率、缺氧的海底环境、频繁的火山喷发形成的丰富的溶解态铁和硫化合物以及低有机碳的沉积物促进了热河昆虫的黄铁矿化。此外，黄铁矿化过程中有明显的微生物膜的帮助，这可能是广泛的热河古湖泊。这一结果首次在热河生物群中发现了广泛的昆虫黄铁矿化记录，并表明黄铁矿化是湖泊演化的重要途径。
ABSTRACT The Early Cretaceous Jehol biota of China, preserved in lacustrine deposits, yields abundant well-preserved invertebrate and vertebrate fossils. However, the exact mode and nature of its extraordinary preservation remains unclear. Here we investigated the preservation of fossil insects from lacustrine successions at 12 Lower Cretaceous localities of China, and found that many insects in Jehol biota were preserved by pyrite (later pseudomorphed by iron oxide). These pyritized fossils were observed solely within lacustrine deposits with volcanogenic sediments. The pyritization of Jehol insects has been facilitated by the moderate sedimentation rate, anoxic bottom environment, abundant dissolved iron and sulfur compounds from frequent volcanic eruptions, and sediments low in organic carbon. In addition, the pyritization process has been evidently aided by microbial films, which may have been widespread in the Jehol paleolakes. Our result provides the first record of widespread pyritization of insects from the freshwater Jehol biota, and shows that pyritization is an important preservational pathway in lacustrine successions.
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DOI：
--
发表时间：
2003
期刊：
--
影响因子：
--
作者：
Chang Meemann
通讯作者：
Chang Meemann
DOI：
10.1360/03yd0071
发表时间：
2003-12-01
期刊：
SCIENCE IN CHINA SERIES D-EARTH SCIENCES
影响因子：
--
作者：
Guo, ZF;Liu, JQ;Wang, XL
通讯作者：
Wang, XL
辽西热河群早白垩世近海双壳类群落
影响因子：
2.1
作者：
Sha, Jingeng;Cai, Huawei;Jiang, Baoyu
通讯作者：
Jiang, Baoyu
DOI：
10.1007/bf02883252
发表时间：
2003-12
期刊：
Science in China Series D: Earth Sciences
影响因子：
--
作者：
Zhengfu Guo;Jia-qi Liu;Xiaolin Wang
通讯作者：
Zhengfu Guo;Jia-qi Liu;Xiaolin Wang
影响因子：
2.7
作者：
ALLISON, PA
通讯作者：
ALLISON, PA