相山铀矿田水—岩氢,氧同位素交换的实验研究

为了研究相山铀矿田的水－岩氢、氧稳定同位素交换作用及其对水溶液和岩石氢、氧稳定同位素组成的影响，为探讨矿床成因提供实验依据，笔者进行了相山铀成矿古水热系统中水－岩氢、氧同位素交换实验。实验结果表明，在水热系统中水－岩之间可以发重 氧同位素交换作用，致使岩石的δ＾１８Ｏ值下降，水的δ＾１８Ｏ值升高，即发生“氧－１８飘移”。热水溶液的δＤ值相对稳定，但与含有较多含氢矿物（云母等）的岩石作用时，δＤ值可     

五台山晚太古代碰撞造山带的变质作用演化

五台山晚太古代碰撞造山带的三个构造岩片组成，即南部构造岩片－弧前混杂岩带，中部构造岩片－岛弧系和北部构造岩片－弧后混杂岩带，其间以大型逆冲型韧性剪切带相拼合。对三个构造岩片的矿物共生组合及变质反应研究，确定其具有相似的造山型ＰＴｔ轨迹，变质早期对峰期明显的升温升压过程与地壳的拼合作用有关，变质峰期至晚期的近等温降压过程与地壳的纵向伸展作用相联系，三个构造岩片变质程度的差异是由于其所处的大地构造位置不同造成的。     

Dynamic Analysis of Deformational Structures of the Xiannüshan Fault Zone in the Three Gorges of the Yangtze River

Field investigation and laboratory work reveal that inhomogeneity of the deformation of the Xiannüshan fault is mainly characterized by lateral zonation, longitudinal segmentation and downward stratification. Based on these results, a 3-D deformational structure model of the fault was established and its geometrical and kinematic characteristics in two main deformational stages i.e. the main Yanshanian and Himalayan were discussed. The directions of principal and the differential stresses in these two stages were determined by using conjugate joints, striations of fault planes and microstructures of the fault zone. The direction of (1 is N-S in direction with differential stresses of 150(250 MPa in the Yanshanian, and N70E with a differential stress ranging from 80-120 MPa in the Himalayan.     

山东五莲七宝山辉石二长岩的地球化学及岩浆源区性质

本文所研究的辉石二长岩为七宝山火山机构中央岩株体的主体岩石。化学成分上,该岩体富碱、富钾,铝含量较高,相对贫钛,富轻稀土和大离子亲石元素,贫过渡族元素。其Rb/Sr、K/Nb、Th/Nb和Ba/Nb值均较高,并具有偏高的ISr值和显著偏低的εNd(t)值。根据对岩石地质地球化学特征的综合分析,同时在与区内相关岩石对比的基础上,指出其岩浆源区含有EMⅠ和EMⅡ多种富集组分,岩石应主要起源于富集地幔的部分熔融。     

陇晋地震相关性及其内在联系初步探讨

通过对现今和历史地震资料的分析研究可以看出:甘肃和山西两地地震存在着较好的相关性。这种相关性的内在联系可能依赖于它们共同所处的地质构造背景—祁连山、吕梁山、贺兰山的"山"字型活动构造体系,可能是欧亚板块东南部在印度洋板块向北俯冲作用力和太平洋板块向西挤压作用力的共同影响下,该活动构造体系产生的一种应激响应。     

福建永泰云山晚中生代双峰式火山岩的地球化学及岩石成因

永泰云山早白垩世石帽山群第Ｉ、Ⅱ旋回岩石组合由沉积岩、基性熔岩、酸性火山岩构成,缺乏中性成分的岩石单元,为典型的双峰式岩石组合。其玄武岩富碱（尤其富钾）、富铝、富铁,贫镁,富轻稀土元素和大离子亲石元素,贫高场强元素及亲铁元素,并具偏高的ＩＳｒ值和显著偏低的εＮｄ（Ｔ）值［ＩＳｒ＝０．７０６８２￣０．７０７７０,εＮｄ（Ｔ）＝－７．４２￣－３．２２。流纹质岩石总体具富碱、富硅、富铝,贫铝、贫镁特征,     

Isolation and Characterization of Pathogenic Listonella anguillarum of Diseased Haft-Smooth Tongue Sole （Cynoglossus semilaevis Günther）

Studies were conducted to determine the cause of the acute mortality of half-smooth tongue sole Cynoglossus semilaevis Günther juveniles in a fish farm in Jimo, Shandong Province, China, in June 2006. Gross signs of the diseased tongue sole included several petechiae and ecchymoses on the body and fin necrosis and hemorrhagic lesion at the base of the fin. Bacteria were isolated from kidney, liver and hemorrhagic lesions of the diseased tongue sole. Among 14 strains, SJ060621 was proved to be highly virulent to juvenile tongue sole with LD50 value of 〈1.0×10^5 colony forming units （CFU）mL^-1, while the remaining 13 were avirulent. Among the 16 antibiotics tested, SJ060621 was sensitive to gentamicin and nitrofurantoin. It was identified as Listonella anguillantm with conventional plate and tube tests in combination with API 20E analysis. 16S rRNA gene and partial HSP60 gene sequenceing analysis revealed that the strain was highly homologous with L. anguillarum. Examination of the infected musculature by electron microscopy indicated numerous bacteria and lots of macrophages containing phagocytosed bacteria. Histopathological investigations revealed severe necrotic degenerative changes in the infected organs. Indirect immunofluorescence assay （IFA） was employed to detect the location of occurrence of bacteria, and bacteria were found in aggregations in the inflammatory areas in musculature.     

中新世以来吕梁山及邻区构造——沉积演化

裂变径迹研究显示中新世早期(23±3Ma)现今吕梁山及周缘地区发生了一次整体性快速隆升。中新世晚期(约8Ma前),吕梁山前、鄂尔多斯盆地及东部宁武—沁水盆地结束了长期剥蚀历史,开始广泛接受新生代沉积。沉积物的垂向叠置关系及横向展布特征显示:8.35～6.7Ma为吕梁山快速差异隆升期,在山前(东西两侧)堆积了冲积扇相芦子沟组砾岩层,暗示了吕梁山已经地貌上成山;与此同时地势相对平坦且摆脱地表水流影响的鄂尔多斯盆地广泛堆积了风尘堆积—红黏土(保德组)。中新世晚期—早更新世早期(6.7～1.8Ma),吕梁山西部山前及鄂尔多斯地区整体缓慢隆升,堆积了新近纪保德组上部、静乐组红黏土及早更新世午城组黄土—古土壤序列。受西部六盘山快速抬升作用影响,鄂尔多斯西部抬升速率略高于东部,于早更新世中期(1.8～1.4Ma)形成现今西高东低的地势格局和南北向晋陕谷地,进而黄河及其支流顺流而下。中更新世以来,鄂尔多斯地区沉积与抬升并重,最终形成现今黄土高原。吕梁山以东的沁水盆地中新世演化史与西部相似,上新世起盆地开始断陷,汾河地堑开始形成。断陷一直持续到早更新世,自下而上依次沉积了下土河组、小白组、大沟组、木瓜组湖相地层,盆地边缘则持续抬升堆积了静乐组和午城组风成堆积。中更新世以来,断陷结束,盆地整体抬升。     

干旱区内陆河流域不同特征居民对气候变化及冰冻圈变化的感知差异分析——以乌鲁木齐河流域为例

选择冰川典型发育的乌鲁木齐河流域,基于面向普通民众的657份调查问卷,将气候变化与冰冻圈变化有机的结合起来,尝试分析不同特征民众对二者变化的感知差异状况,为因地制宜制定适应性措施以及普通民众有计划、有目的地调整生产和生活策略,适应未来环境变化等提供公众参与的社会依据.调查结果显示,乌鲁木齐河流域不同特征居民之间有着复杂...     

阿尔金北缘索尔库里北山铜银矿床控矿构造分析

索尔库里北山铜银矿床位于阿尔金北缘的索尔库里走廊北侧,属于受推覆构造上盘次级断裂控制的热液型矿床。矿区出露蓟县系金雁山组厚层灰岩段、中层灰岩段和青白口系小泉达坂组薄层片岩段3个岩性段。薄层片岩段所构成的推覆构造原地系统中的紧闭褶皱及面理置换、厚层灰岩段和中层灰岩段构成的推覆构造外来系统中的中等-开阔型褶皱、推覆构造以及晚期陡倾角走滑断裂构成矿区基本构造格架。推覆构造自南向北推覆并被后期阿尔金走滑断裂穿切,推覆构造面转折处上盘发育的次级断裂是主要的赋矿构造;矿化带和矿体的形态、产状、分布和规模均严格受赋矿构造的控制。