中国北方新近系红土成因的古生物化石讨论

为进一步弄清楚中国北方新近系红土的沉积环境,从古生物的角度出发,针对天水-秦安一带新近系沉积地层中发现的大量古脊椎动物化石进行研究,结果发现:化石组合的典型特征是大量三趾马的存在,同时伴有大量的犀类及长鼻类化石,这一特点与临夏地区极为一致,表明至少在晚中世以前该地区气候还是相当湿润的,无法产生类似黄土的新近系风成红土沉积,这也同时得到邻近其它地区相关古生物证据的支持,古脊椎动物化石证据并不支持红土唯一风成的推论.图2,表1,参13.     

辽宁省北二十家子镇第四纪肿骨鹿化石的研究

初步对辽宁省建平县北二十家子镇附近出土的第四纪哺乳动物化石进行分析,结果为形成于新生代中更新世的温暖潮湿的草原生态系统的肿骨鹿鹿角化石.鹿角化石硅化较强,通过区域地层与化石对比,研究区内的鹿角化石时代形成于中更新统早期.鹿角化石埋藏于黄土地层中,黄土为干燥寒冷的草原环境产物,分析得出研究区出现过温暖潮湿的气候环境,此后长期以干燥寒冷的气候环境为主,进而推测哺乳动物受气候影响变化较大,乃至灭绝.     

生物进化树中的模糊问题浅论

生物进化树是生物进化序列的特殊表现形式,它是生物进化论研究取得的重要成就,但生物进化树仍存在一些模糊问题．本文根据现代生物学、生物进化论、古生物学成就,就存在的模糊问题、产生原因及研究意义进行了浅简的论述.     

The first discovery ofEucommia fruit fossil in China

A fruit of Eucommia has been recovered from the Eocene of Fushun, Liaoning Province. This represents the only confirmed occurrence of fruits of this genus in the paleobotanical record of China. Although Eucommia is endemic to central China today, the genus was more widespread in the Northern Hemisphere during the Tertiary. The fossil specimen from Fushun corresponds closely to the fruits of E. montana Brown from the Eocene of western North America and is easily distinguished from fruits of the living E. ulmoides Oliv. and the Japanese Eocene species, E. kobayashii Huzioka by its smaller size.     

Application of the ancient trace fossil group in deep sea to the sedimentology

Extremely abundant trace fossils are associated with the deep-sea deposits, especially in turbidite measure and flysch fades. And these trace groups then become the effective indicators to reconstruct the ancient depositional environment and the palaeogeography. This paper focuses on ( i ) the formational features of deep-sea fossil and its assemblage feature, and further recongnizes that the coexistence of the shallow and deep water trace group in a depositional sequences is the identification mark of turbidite sequence; ( ii ) thought and methods using the trace fossil to restore their environmental parameters such as the ancient sea depth, oxygen-bearing condition and sedimentation rate, etc.; (Ⅲ) the application and significance of deep-sea ichnofacies in environment interpretation.     

从植物化石叶片中获取古大气CO2浓度的信息

近几十年来,由于全球变暖,人们越来越关注气候变化。科学研究显示,大气中不断上升的CO2浓度是导致变暖的主要因素,于是认识大气的CO2浓度变化已经成为了当今科学界的热点。古生物学家对植物化石叶片的研究被证明是了解地质历史时期古大气CO2浓度信息的重要途径。本文对这方面的研究状况做简略介绍。     

火电站能量系统绿色热经济及优化分析

分析了火电站能量热力系统 （锅炉热力系、汽轮机热力系） 的能源经济效率（Yong经济效率）,并从绿色生态保护角度出发,分析了火电站的生态效率计算模型.以系统绿色Yong经济运行系数入手分析,以发电成本最低为依据,建立了火电站能量系统的绿色Yong经济运行系数的优化表达式.最后以部件优化追加投资效益为研究对象,从而确立了需要改进的部件及其改进所得的综合效益函数.     

Systematics and phylogeny of Eodrepanus,a new Drepanocerine genus,with comments on biogeographical data (Coleoptera: Scarabaeidae: Oniticellini)

We describe here Eodrepanus gen. nov., currently comprising nine species, six previously assigned to the genus Drepanocerus and three described as new (namely, E. morgani sp. nov., E. paolae sp. nov. and E. coopei sp. nov.). Two of the new species have an Afrotropical distribution, while the last is an Eemian fossil species from England. Maximum parsimony was used to analyse reciprocal relationships among the species of Eodrepanus gen. nov., and four of the 24 species remaining in Drepanocerus. Support for these phylogenies was evaluated using the Bootstrap method and Bayesian inference as implemented in MrBayes. The biogeography of Eodrepanus gen. nov. was analysed using several different methods, namely, analysis of similarity (Ochiai Index), dispersal–vicariance analysis and parsimony analysis of endemicity.     

影响沉积物中有孔虫丰度的死态因素探讨

根据近年野外调查和室内研究，本探讨了影响沉积物中有孔虫丰度值的诸死态因素，死态因素乃指环境对死亡后的生物体产生各种变化作用的自然因素。研究表明溶解作用和搬运作用对沉积中有孔虫丰度有极为重要的影响作用。     

两种恐龙化石保护材料性能探讨

研制一种易于施工和保存、环境友好、透明性佳的恐龙化石保护新材料.与传统保护材料(硝基清漆)的对比表明:涂覆传统保护材料的围岩吸水质量分数为1.91%,而涂覆新型保护材料的吸水质量分数为1.42%,后者能进一步阻止水分的渗入,提高化石疏水性.用0.5%H2SO4浸泡,传统材料的起泡时间为48 h,新型材料为96 h;经0.5%pH3的NaCl溶液盐雾腐蚀,传统材料经4 h起泡,新型材料40 h才起泡,表明新型保护材料具有良好耐蚀性.实验中两种材料附着力均为1级,而新型材料的柔韧性为1 mm,优于传统材料的3mm,因而与化石基体间的结合性更好.新型材料具有30 d的紫外老化性能,优于传统材料的10 d.