远景圈闭与成藏组合的地质风险评价指南     

White.DA  大道 《海洋地质译丛》1994,(4):1-10

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澳大利亚海岸概况     

D.沃克  J.沙贝尔 《热带海洋学报》1983,(2)

澳大利亚是个大陆岛,界于南纬11°—43°,东西长5000公里,面积约770万平方公里(包括塔斯马尼亚岛等)。她与南极大陆隔以3000公里的海域。在澳大利亚和亚洲大陆之间有一列岛屿,其中新几内亚位于与澳大利亚相同的大陆架上,在第四纪时通常是相连的。  相似文献   

由偏顶蛤贝壳中稳定同位素剖面追溯海水温度记录     

蔡德陵  A.Margosian  F.C.Tan  K.H.Mann 《海洋科学进展》1988,(3)

本文用在加拿大诺瓦·斯科舍省芬克湾采集到的两只活体偏顶蛤(Modiolus)贝壳上的氧同位素组成重建了过去十年间的底层海水温度记录,它也可作为一种独立的方法来确定贝壳上外生长线的沉积时间。由于对贝壳进行了密集采样(可多至每个贝壳沉积年份取15个样品),贝壳上的δ~(16)O变化反映了芬克湾底层海水的季节性变化。两只贝壳所得的温度剖面符合得很好,说明它们基本上是与真实的环境温度相对应的。本研究证明在海胆疾病爆发时底层海水的温度并没有异常升高,这说明疾病传播的关键因素是带病的生物体,而不是温度。同位素技术也说明了在贝壳外表面上可见的外生长线是年轮性的,它们是在每年冬季最低水温时沉积出来的。  相似文献   

A cDNA microarray technique applied for analysis of global gene expression profiles in tributyltin-exposed ascidians   总被引：2，自引：0，他引：2  

Azumi K  Fujie M  Usami T  Miki Y  Satoh N 《Marine environmental research》2004,58(2-5):543-546

To analyze global gene expressions, we constructed a cDNA microarray from a basal chordate, the ascidian Ciona intestinalis. Ciona is a cosmopolitan species and a genomic analysis of Ciona revealed that ascidians had approximately 15,500 protein-coding genes. Our "Ciona intestinalis cDNA chip version 1 (Ci cDNA chip ver. 1)" has arrayed 13,400 unique Ciona cDNAs. To establish a detection system for gene expression profiles in wild ascidians using a cDNA microarray, we analyzed gene expressions in the whole body of Ciona adults after exposure to 100 nM tributyltin (TBT) for 24 h. In our preliminary array data using Ci cDNA chip ver. 1, we found more than 200 genes that showed strong differential expressions. These genes encoded proteins that were concerned with stress response, detoxification, oxidoreduction reaction, biosynthesis, and catabolism. This, the first large cDNA microarray of this animal, should facilitate analyses of global gene expressions following exposure to TBT.  相似文献   

一个与转移作用有关的盆地的演化：Ardea盆地（意大利中部拉齐奥地区）     

C.Faccenna钟广见  王嘹亮 《海洋地质前沿》1995,(8):19-21

一个与转移作用有关的盆地的演化：Ａｒｄｅａ盆地（意大利中部拉齐奥地区）Ｃ．Ｆａｃｃｅｎｎａ等地层Ａｒｄｅａ盆地是拉齐奥边缘最深的盆地之一。充填了１６００ｍ中新－更新统沉积。这套沉积物覆盖在一套中新统以泥灰质－砂泥质为主的复理石异地构造层上，复理石上覆...  相似文献   

伊豆—小笠原海沟之西迁和菲律宾海板块之北...     

Otsuki  K 赵国先 《海洋地质译丛》1991,(6):9-17

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СТАНДАРТИЗАЦИЯ ПЛАНКТОННЫХ ИССЛЕДОВАНИЙ В МОРЕ     

В.Г.Богоров 《海洋与湖沼》1957

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In-Situ Observation of Fluid Mud in the North Passage of Yangtze Estuary, China   总被引：1，自引：0，他引：1  

李九发  万新宁何青应铭  时连强S.M.Hutchinson 《中国海洋工程》2004,18(1):149-156

Observations of fluid mud were made in the lower North Passage of the Yangtze Estuary in February 2000, on 10 -11 August 2000, on 30 - 31 August 2000 (after two strong typhoons), on 21 - 24 August 2000 (neap tide) and on 3 -6 September 2000 (mean tide) respectively. In situ data show that the fluid mud in this area consists of fine cohesive sediment (median size 7.23 μm). The formation and movement of fluid mud varied during the neap-spring and flood-ebb tidal cycle. Observations suggest that fluid mud phenomena in this area may be categorised in a three-fold manner as slack water, storm and saltwedge features. The thickness of the fluid mud layer of slack water during the neap tide ranged from 0.2 to 0.96 m, whereas during the mean tide, the thickness ranged from 0.17 to 0.73 m, and the thickness of the fluid mud layer was larger during slack water than at the flood peak. Shoals cover an area of 800 km^2 with a water depth smaller than 5 m. Erosion of these extensive intertidal mudflats due to storm action provides an abundant sediment source. This is particularly significant in this estuary when the tidal level is lower than 5 m. The lower North Passage is a typical zone of saltwater wedging, so the saltwedge fluid mud has the most extensive spatial range in the estuary.  相似文献   

利用密度和核磁共振测井分析Mallik 5L-38井的天然气水合物饱和度     

T．Takayama  陆敬安 《海洋地质》2006,(3):64-70

以前的研究表明密度和核磁共振测井数据可用来精确计算储层的天然气饱和度。传统的气体储层中开发的用于天然气饱和度计算的密度-磁共振法也可用于天然气水合物饱和度分析。在不使用复杂方程或假设的情况下，基于经验方程，密度-磁共振方法可得到精确的地层孔隙度、气体和（或）天然气水合物饱和度。本文通过密度-磁共振响应方法来识别Mallik 5L-38井所穿沉积剖面中的天然气水合物带。结果证明密度-磁共振方法可以计算经气体校正后的孔隙度和精确的天然气水合物饱和度。  相似文献   

Assumption and elimination of trace elements in Adélie penguins from Antarctica: a preliminary study     

Ancora S  Volpi V  Olmastroni S  Focardi S  Leonzio C 《Marine environmental research》2002,54(3-5):341-344

The concentration and distribution of some trace elements were determined in stomach contents, excreta and feathers of Adélie penguins (Pygoscelis adeliae) breeding at Edmonson Point (Terra Nova Bay-Antarctica). In these materials obtained by non-destructive methods, concentrations of mercury, cadmium and lead measured were used to establish natural levels of these metals in the penguins' diet. An intake-excretion hypothesis was formulated.  相似文献