Initial organic geochemical investigation on Late Neoproterozoic-Early Cambrian sediments in the Yangtze region, China

Totally 19 samples of typical Upper Proterozoic-Lower Cambrian sedimentary rocks were collected and analyzed for an organic geochemical investigation. Almost all these rocks have high TOCs, super-maturities and similar biomarker distribution. As an exception, however, the Sinian Nantuo Tillite shows much lower TOCs and little phytane and pristane in comparison with those in other strata, which implies a very faint photosynthetic process, and a restricted euphotic zone and quite limited sunlight within the sedimentary water column during the Sinian glaciation age in the western Yangtze region providing an evidence for palaeo-oceanic environment of the Neoproterozoic Snowball Earth age.     

既是历史学的,又是人类学的——再读《雪球:汉民族的人类学分析》有感

历史人类学在中国有着广泛的应用前景。由徐杰舜教授主编的《雪球 :汉民族的人类学分析》即是应用历史人类学的理论与方法来研究汉族历史和文化的创新之作 ,从学术上来说 ,《雪球》在对汉民族作人类学分析时 ,既强调汉民族文化的历史向度 ,也用人类学理论对汉族文化作了详细的分析 ,它既是历史学的 ,又是人类学的。《雪球》一书的出版 ,标志着历史人类学在中国有了良好的开端 ,扩大了人类学理论在历史学界的影响     

汉族案例：中华民族从多元走向一体

中华民族从多元走向一体是一个过程，而且是一个很长的历史过程。在这个历史过程中，民族与民族之间的分分合合、合合分分必然会形成一些阶段性的民族融合成果。其中汉民族就是一个典型的从多元走向一体的案例，从中可以窥见中华民族的未来将如何在发展中实现“多元一体”。     

Geochemistry of Sinian tillites from Hunan Province, South China--A test of the Snowball Earth hypothesis

A glaciomarine succession of Neoproterozoic age (between 748～584 Ma) is widespread on the Yangtze Platform, South China. The deposition took place during an intermediate to low paleolatitude position of the Yangtze Platform. The Snowball Earth hypothesis offers an explanation for the occurrence of low-latitude tillites in general. It is based on records obtained of deposits underlying and overlying the tillites. In contrast, we focused on the tillites themselves by using geochemistry to obtain detailed information about the conditions during the glaciation. Of particular interest are environmental conditions, which are closely related to the climate development. Additionally, stable isotope geochemistry was used for a paleoclimate interpretation. The geochemical results of the Sinian glacial succession on the Yangtze Platform are compared to the predictions made by the Snowball Earth hypothesis.     

对《雪球》“族群”理论运用的商榷

《雪球》一书在汉民族研究的方法论上有许多突破,但《雪球》在“族群”理论运用中也存在一些不足。与国内“族群”理论的研究成果相比较,该书在“族群”理论的运用上可以进行更多的借鉴。