《华鄂堂读书小识》浅识

《华鄂堂读书小识》为民国长沙藏书家叶启发就其家藏宋元明本、名人批校本书籍详加考证，缀以题跋而成的一部古籍版本题记，其内容涉及各书版刻源流，内容得失。

Analysis of the Motion and Deformation Characteristics along the Zhangjiakou-Bohai Fault

We have collected GPS data in the period of 1999-2007 from the Crustal Motion Observation Network of China along the Zhangjiakou-Bohai fault and its adjacent regions to study the characteristics of present-day crustal horizontal motion velocities in the research zone.Strain rate components are computed in the spheric coordinate system by the least square collocation method.According to the spatial distribution of the principal strain rate,dilation rate and maximum shear strain rate derived from GPS measurements,this paper analyses the deformation of the subordinary faults of the Zhangjiakou-Bohai fault.The principal compression strain rates are apparently greater than the principal extension strain rates.The larger shear strain rate is mainly in and around the Xianghe,Wenan and Tangshan areas in Hebei Province.According to the profiles across different segments of the Zhangjiakou-Bohai fault,the three segments glong the Zhangjiakou-Bohai fault show an obviously left-lateal strike-slip and compression characteristics.By analysis of the motion characteristics of the blocks,e.g.the Yanshan block,North China Plain block,Ordos block,and Ludong-Huanghai block in and around the North China region,this paper speculates that the dynamics of the motion styles of Zhangjiakou-Bohai fault may directly come from the relative movement between the Yanshan block and the North China plain block,and the ultimate dynamics may be the results of the collison between Indian plate and Eurasian plate,and the persistent northeastward extrusion of the Indian plate.

First maguviopseid cicada from the Middle-Upper Triassic Tanzhuang Formation in Jiyuan Basin,western Henan,and its stratigraphic significance

A new fossil insect taxon,Triasomaguviopsis jiyuanensis Zhang Q.et Zhang H.gen.et sp.nov.,is established based on a specimen from the Upper Member of the Tanzhuang Formation,Jiyuan Basin,western Henan Province,central China,and is assigned to the family Maguviopseidae of the superfamily Prosboloidea(Hemiptera,Cica domorpha).This new taxon ischaracterized by smaller granular tegmen,ScP+RA first forked near its mid-length,MP forked more toward apex of ScP+R with three terminals,and singular and sinuous CuA2.This new discovery extends the palaeogeographic distribution of Maguviopseidae to the Jiyuan Basin,increases diversity of this family and has the potential in biostratigraphic correlations.Insects from the Tanzhuang Formation may belong to the Tongchuan Entomofauna from the Ordos Basin,which has a close relationship with the Madygen Entomofauna from Kyrgyzstan.

Timing of uplift and evolution of the Lüliang Mountains,North China Craton

This study analyses evidence for reformed basin development and basin-mountain coupling associated with devel- opment of the Ordos Basin and the Laliang Mountains, China. Gaining an improved understanding of the timing and nature of uplift and evolution of the Ltiliang Mountains is important for the reconstruction of the eastern sedimentary boundary of the Ordos Basin （a major petroliferous basin） as well as for providing insight into the evolution and breakup of the North China Craton （NCC）. Based on systematic sampling for fission track analysis, it is suggested that the main phase of uplift of the Laliang Mountains occurred since later part of the Early Cretaceous. Three evolutionary stages of uplift and development are identified： slow initial uplift （120-65 Ma）, accelerated uplift （65-23 Ma）, and intensive uplift （23 Ma to present）, with the ma- jority of the uplift activity having occurred during the Cenozoic. The history of uplift is non-equilibrium and exhibits complex- ity in temporal and spatial aspects. The middle and northern parts of the Ltiliang Mountains were uplifted earlier than the southern part. The most intensive episode of uplift activity commenced in the Miocene and was associated with a genetic cou- pling relationship with the eastern neighboring Cenozoic Shanxi Grabens. The uplifting and evolutionary processes of the Ltiliang Mountains area since later part of the Early Cretaceous share a unified regional geodynamic setting, which was ac- companied by uplift of the Mesozoic Ordos Basin and development of the neighboring Cenozoic Shanxi Grabens. Collectively, this regional orogenic activity is related principally to the far-field effects of both the compression sourced from the south- western Tibet Plateau and westward subduction of the Pacific Plate in Cenozoic.