长春市郊首次发现鸭咀龙化石

1988年夏天,山东民工在长春市南郊红咀子挖砂子时,发现一较大骨骼化石,出土时风化严重,但两端关节面保存完好。经鉴定该化石属于鸟臀目(Ornithischia)。鸟脚亚目(Ornithopoda)鸭咀龙科(Hadrosauvidae)。鸭咀龙是鸟脚亚目在进化过程中最后分化出来的一群,生活在晚白垩世,而且十分繁盛,以北美和亚洲分布最多。在我国山东、黑龙江和内蒙都发现较完整的鸭咀龙化石,在吉林省刘房子也发现过零星的骨骼化石,但在长春市郊尚属首次发现。 该鸭咀龙化石产在距地表深约20m的晚白垩世泉头组紫红色粘土岩中,在同一层位中还发现有较多破碎的骨骼化石,在距该地不远的长春市二机砖厂附近还发现有恐龙蛋化石。这些化石的发现表明长     

华夏龙谱(41)——中国双嵴龙(Dilophosaurus sinensis)

1987年8月,云南省昆明市博物馆恐龙发掘队在晋宁县夕阳彝族乡下禄丰组地层中,发掘出了一具属于古脚类的云南龙化石,当地村民纷纷前来围观。有村民告诉发掘队,这种骨头化石在木杵榔村青龙山也有,在村民指引下,果然在一小冲沟里发现了恐龙骨架化石,经几天挖掘,揭露出两具纠缠在一起的恐龙化石:一条兽足类恐龙正咬住一条古脚类恐龙的尾巴。其兽足类恐龙属双嵴龙。虽然双嵴龙化石早在1942年就在美国的亚利桑纳州下侏罗统地层中已有出土,但在亚洲则是首次发现。分类:蜥臀目(Saurischia),兽脚亚目(Theropoda),腔骨龙超科(Ceolophysoidae)。特征:…     

陇原化石珍品

正神州戈壁巨龙学名:Gobititan shenzhouensis尤海鲁,唐烽,罗哲西2003语源:"gobi"即戈壁,指蒙古与内蒙古之间的地理区域,该处已发现了大量的中生代恐龙化石,"Titan"指的是希腊神话中的巨人,象征化石庞大的身躯;种名"shenzhou",即神州,中国的古称。产地与层位:公婆泉盆地下白垩统新民堡群分类位置:蜥臀目蜥脚亚目巨龙型类食性:植食性体长:约13米特征:戈壁巨龙是一种相当原始的巨龙型类恐龙,它与其它巨龙型类成员的     

大唐永靖龙

<正>学名:Yongjinglong datangi李立国,李大庆,尤海鲁,皮特·道德森2014语源:属名"Yongjing"指甘肃省永靖县,是刘家峡恐龙国家地质公园所在地;"long"即"龙";"datang"有两个含义,一指中国"唐朝",二献给我国恐龙研究学者,中科院古脊椎动物与古人类研究所的唐智路先生。产地与层位:兰州盆地下白垩统河口群分类位置:蜥臀目蜥脚亚目巨龙型类食性:植食性体长:约15-18米特征:大唐永靖龙的正模化石包括三颗牙齿、八个椎体、左侧肩胛乌嘬     

华夏龙谱（42）——新洼金山龙（Jingshanosaurus xinwaensis）

1988年10月,禄丰县文化馆的王正举在本县金山镇新洼村小山坡上,发现一具完整的原蜥脚类(Pro-sauropoda)恐龙化石骨架。经1990年该县新建的禄丰恐龙博物馆工作人员努力,架装在该馆陈列大厅,并在开馆时隆重展出。1995年由重庆自然博物馆张奕宏及禄丰恐龙博物馆杨兆龙共同完成研究并命名。分类:蜥臀目(Saurischia),蜥脚型亚目(Sauropodomorpha),大椎龙科(Massospondyli-dae)。特征:体长5m～6m,高2m,在原蜥脚类恐龙中算大块头。骨骼重而粗壮,头骨较小,头长37·5cm。头长为头高的1·7倍,颅骨较高。匙状牙齿,主食植物,有时可能也食软体动物、小…     

半月金塔龙

<正>学名:Jintasaurus meniscus尤海鲁,李大庆2009语源:"Jinta"即"金塔",该恐龙化石产地据甘肃省金塔县不远;"sauros"源于希腊语,即"蜥蜴";"meniscus"源于拉丁文,意为"新月形的",指标本枕部半月形的枕骨侧突和枕髁。产地与层位:酒泉地区下白垩统新民堡群分类位置:鸟臀目鸟脚亚目鸭嘴龙型类食性:植食性体长:约9米特征:一原始鸭嘴龙型类恐龙。它的半月形枕骨侧突非常发育,以致其末端低于枕髁;这是在其他鸭嘴龙型类恐龙中未见的。意义:截止日前,北山地区已发现了三种原始鸭嘴龙形类恐龙,即诺曼马鬃龙(2003)、半月金塔龙(2009)及日伦叙五龙(2011)它们在鸭嘴     

恐龙胚胎研究II——椭圆蛋中的雏骨

对椭圆蛋中的雏骨使用超高档螺旋ＣＴ机进行了测试，分析研究，并根据雏骨的形态特征和骨密度数据，推断出各种骨骼的发育顺序，并认定生椭圆蛋的恐龙可能是蜥臀目兽足亚目中的肉食龙类的惧龙。     

滇西早石炭世的板海百合科

板海百合科(Platycrinidae)属于圆顶海百合亚纲(Camarata)、单环圆顶海百合目(Monobathrida)、雕海百合亚目(Glyptocrinina)、板海百合超科(P1atycrinitacea)中的一个科。本科的化石代表在志留纪末期(?)开始出现,早石炭世为其繁荣昌盛时期,晚二迭世即行绝灭。在北美和欧洲该段地史的地层中,特别是下石炭统,板海百合科的化石相当普遍,已经描述过的有七个属。在亚洲,这类化石就很少见到,只在蒂摩尔(Timor)地区的二迭纪地层中发现过;在我国,虽然早在1926年,田奇镌著《华北太     

陇原化石珍品

<正>炳灵大夏巨龙学名:Daxiatitan binglingi尤海鲁、李大庆、周伶琦、季强,2008产地与层位:兰州盆地下白垩统河口群分类位置:蜥臀目、蜥脚亚目、巨龙型类食性:植食性体长:约30米特征:大夏巨龙是巨龙型类的一个基干分子,其独特的股骨构造指示出一种强烈外撇的走步姿态。同时,这种姿态也得到了保存于刘家峡恐龙国家地质公园同一层位的强烈外转的、宽间距的蜥脚类恐龙行迹的进一步佐证。估计其颈部长度为12.5米,整个身体长度为30米,使其成为中国乃至亚洲最大的恐龙之一。     

华东白垩纪鸭嘴龙类恐龙蛋化石的发现

浙江天台白垩纪地层中最常见的蛋化石类型之一是赤城山组地层（锆石U-Pb法同位素年龄约92Ma）的树枝树枝蛋（Dendroolithus dendriticus）。对比河南西峡含恐龙胚胎的蛋化石,确定其为鸭嘴龙类（Hadrosaurs）恐龙所产。鸭嘴龙类恐龙在系统分类上归鸟脚亚目（Ornithopoda Marsh,1881）鸭嘴龙超科（Hadrosauroidea Cope,1869）鸭嘴龙科（Hadrosauridae Cope,1869）,建议树枝蛋化石也相应归入圆形蛋化石亚目（Spheroolithineae账oosubord．nov．）树枝蛋化石超科（Dendroolithoidea oosuperfam．nov．）树枝蛋化石科（Dendroolithidae Zhaoand Li 1988）,以便对应研究。从已知的鸭嘴龙类恐龙产蛋尺寸推算,浙江天台的树枝树枝蛋（Dendroolithus dendriticus）为身长不超过7m的恐龙所产,个体大小类似东北一蒙古发现的萨哈林日本龙（Nipponosaurus sachaIinensis）、李氏黑龙江龙（Amurosaurus riabinini）和姜氏巴克龙（Bactrosaurus johnsoni）。该蛋在巢穴里,无序放置,至少3层,常超过20枚,蛋壳具韧性,重力作用下呈扁球形。     

Global repeating events in the history of the Earth and the motion of the Sun in the Galaxy

Chronological analyses of correlations between certain global repeating events (mass extinctions of marine organisms, meteorite impacts, and flashes in the frequency of geomagnetic reversals) during the Phanerozoic Eon and the motion of the solar system in the Galaxy are presented for five rotationally symmetrical models for the regular Galactic gravitational field. Thirteen of sixteen mass-extinction events can be described by a repetition interval of 183±3 million years. This is in agreement with the anomalistic period (interval between two subsequent passages of the Sun through the apocenter of its Galactic orbit) in the model of Allen and Martos. The positions of the minima and maxima in Gaussian functions approximating the frequency distribution for geomagnetic reversals also agree with the times of passage of the Sun through the apocenter and pericenter, respectively, of its Galactic orbit in this model. The maximum in the distribution of the deviations of the dates of mass extinctions from the nearest dates of impacts of large, crater-forming bodies is close to zero, providing evidence that many such events are correlated. As a rule, extinctions follow impact events. The impacts of large bodies have occurred most often when the solar system passes through the Galactic plane, while mass extinctions occur more often at some distance from the Galactic plane (about 40 pc). As a rule, intervals of increases in the frequency of geomagnetic reversals coincide with dates of impacts of large bodies. At the same time, these intervals do not show a clear correlation with the dates of mass extinctions. The intensity of mass extinctions, like the energy released by impacts, is consistently higher in periods when the Sun is moving from the apocenter toward the pericenter of its orbit, than when it is moving from the pericenter toward the apocenter. Thus, there is evidence for a variety of relationships between repeating global events in the Phanerozoic and the motion of the Sun in the Galaxy. Long-period variations in the frequency of geomagnetic reversals are correlated with the orbital motion of the Sun, and increases in the frequency of geomagnetic reversals are correlated with impacts. Mass extinctions are correlated with the impacts of large bodies, whose motions may have been perturbed by clouds of interstellar material concentrated toward the Galactic plane and by the shock front associated with the Perseus spiral arm, through which the solar system passes. The velocity of the Sun relative to the spiral pattern is estimated.     

截潜工程在计算山前侧向补给量中的应用

在计算山前侧向补给量的方法中,最常用的就是达西断面法,但达西断面法需要获取较多的参数,对于山前无钻孔或只有少量钻孔且水文地质研究程度较低的区域,很难采用达西断面法来计算得到山前侧向补给量。对于无法运用达西断面法但存在完整式截潜工程的山丘区,可以结合完整式截潜工程的截潜量利用水量均衡法计算山前侧向补给量。     

"青藏高原南部空白区基础地质调查与研究"计划项目新成果、新进展

通过2004年度各相关图幅的大力工作，在基础地质、矿产和资源等方面取得了大量实际材料，综合研究区域构造．地层格架、青藏高原地质图和青藏高原南部火山岩及其地球动力学意义等，取得重要进展和新认识，在矿产资源、旅游和人文景观等方面也取得重要阶段性成果。     

“青藏高原南部空白区基础地质调查与研究”计划项目新成果、新进展

通过2 0 0 4年度各相关图幅的大力工作,在基础地质、矿产和资源等方面取得了大量实际材料,综合研究区域构造地层格架、青藏高原地质图和青藏高原南部火山岩及其地球动力学意义等,取得重要进展和新认识,在矿产资源、旅游和人文景观等方面也取得重要阶段性成果。     

关中盆地大荔地区地下水氟水文地球化学规律

为了研究关中盆地大荔地区氟的水文地球化学规律,采集239个地下水样品及35个土壤样品,分析了水化学类型和水化学组分对氟的影响,结果表明在弱碱性环境下,重碳酸钠型是促进氟富集并增强围岩向地下水中转化的主要因素;硫酸钙镁型的地下水抑制氟富集。水化学组分中Na+、Cl-、HCO3-、pH与氟呈正相关,而Ca2+则抑制水溶液中氟含量增加;迁移系数与HCO3-、pH呈正相关关系,与其他主要离子呈负相关关系。利用Preeqic软件分析了饱和指数和Ca2+、F-的离子活度,得出萤石的平衡控制着氟和钙的水文地球化学行为,F-可能来源于萤石和方解石的分解。     

Determination of Emissions in the City by the Rate of Change in the Integral Content of Impurities in the Atmospheric Boundary Layer

Doklady Earth Sciences - A new approach to the problem of determining the density of emission fluxes of anthropogenic impurities from distributed urban sources by the rate of growth of the integral...     

Terrane tectonics in the formation of the groundwater runoff in the active water-exchange zone of mountainous river valleys in the cryolithozone

The significant role of the drainage area’s geological background in the formation of the groundwater runoff in the active water-exchange zone was revealed for the first time on the basis of long-term observations of streams of the Upper Kolyma River region during the autumn-winter low-water period, when the rivers are fed only by the groundwater recharge. The analysis of all the available data made it possible to define the characteristic periods in the autumn-winter low-water season. The waters of the seasonally thawed layer play the dominant role in the river’s recharge in September; the suprapermafrost water, in January; and the subgelisol water (nonfreezing water streams) during the 30-day-long period of the minimal flow. The quantitative parameters of the groundwater runoff corresponding to its module during this period reflect the water influx to the active water-exchange zone. It is established that the latter is minimal in the In’yali-Debin synclinorium, which consists of sedimentary rocks formed in deepwater trough environments. Their subsequent transformation proceeded under the action of subduction-accretionary and shear strains. The water availability in the active water-exchange in the Ayan-Yuryakh anticlinorium zone is substantially higher, although the Late Paleozoic and Early Mesozoic sedimentary formations of this area were also deposited in deepwater trough settings, but their subsequent evolution was related to the uplift of the anticlinorium. The maximal watering is observed in the active water-exchange zone of the Omulevka terrane, which is composed of Paleozoic terrigenous-carbonate and carbonate formations. The differences in the hydrogeological regimes of the terranes may be significant with respect to their geoecology.