孟加拉冲积扇在海平面上升和高水位期的活动生长

孟加拉冲积扇在海平面上升和高水位期的活动生长ＭｉｃｈａｅｌＥ．Ｗｅｂｅｒ等碎屑物经过海底冲积扇从陆地搬运到深海。故其主要的沉积作用是浊积作用。通过一般的理解，建立在对许多古代和现代海底冲积扇观察基础之上的层序地层学模式（Ｖａｉｌ等，１９９１），人们认...     

太平洋牡蛎卵子体外发育的研究

研究了太平洋牡蛎（Crassostrea gigas Thunberg)卵子体外发育的过程。解剖性腺获取的卵子大多发育至第1次减数分裂前期。在海水、氨海水中浸泡能促使生成泡破裂，促进卵子的继续发育，而且卵子在氨海水中的发育速度要快于在纯海水中的发育速度。     

东海陆架盆地新生代地层特征及其含油气性

总结了东海陆架金地近30a来的油气地质勘探成果和认识；讨论了盆地新生代岩石-古生物地层特征；根据现有发现，指出东海陆架金地新生代自古新统至第四系的油气发现和合油气层位，以及油气生成、储集的勘探目标层系。认为迄今在东海陆架盆地的工业性油气发现仅仅限于西湖凹陷和瓯江(丽水)凹陷，但随着勘探开发的更大规模投入和认识程度的深化，必将出现一轮新的发现热潮，这不仅对改变上海地区能源结构，而反对提高我国油气勘探的认识都具有重要意义。     

中国海海陆之变迁

本文简要讨论了中国海海陆变迁的历程和研究意义，提出了“年轻的黄、渤海”、“较为古老的南海”和东海介于其间的认识。     

西沙群岛地下淡水及其相关因素探讨

本文围绕西沙群岛生物礁地下淡水的来源、可能成因和赋存条件进行了初步讨论，提出了有待深入研究的课题。     

Sedimentary architecture of the Holocene mud deposit off the southern Shandong Peninsula in the Yellow Sea

Newly acquired high-resolution seismic profiles reveal a nearshore and an of fshore mud depocenter of f the southern Shandong Peninsula in the Yellow Sea.The nearshore depocenter is distributed in bands along the south coast of Shandong Peninsula.The of fshore depocenter is part of the distal subaqueous deltaic lobe,which deposited around the southeastern tip of the Shandong Peninsula.Between the two depocenters is a linear depression.The mud deposits directly overlie the postglacial transgressive surface and can be divided into lower and upper units by the Holocene maximum flooding surface.The nearshore and off shore units display different seismic structures.The lower unit of the nearshore deposit exhibits basal onlap,whereas the upper unit is characterized by progradation.The lower and upper units of the off shore deposit display distinct acoustic features.The lower unit has low-angle aggradation with internal reflectors generally dipping seaward and truncated by the Holocene maximum flooding surface,whereas the upper unit is characterized by aggradation and progradation landward rather than seaward.Results of geochemistry analysis of QDZ03 sediments and mineral analysis of WHZK01 sediments suggest that the nearshore deposit and the lower unit of the of fshore deposit are derived from the proximal coastal sediments of the Shandong Peninsula and the Huanghe(Yellow) River sediments.The upper unit of the of fshore deposit is mainly Huanghe River-derived.The lower unit of the mud deposit represents a post-glacial transgressive system tract according to dates of core QDZ03,and the upper unit represents a highstand system tract from middle Holocene to the present.These results will be of great significance to further understanding of the transportation of the Huanghe River sediments into the Yellow Sea and the spatial distribution of the subaqueous delta.     

澳大利亚西南部风成砂屑灰岩的分布、形态和时代特征

在澳大利亚西南沿海,特别是在南邦(Nambung)国家公园,成千上万个高达5m、宽2m、相距0.5m的锥形风成砂屑灰岩组成壮观的喀斯特地貌,为形成于更新世含钙质/微生物的古土壤沉积物。锥形风成砂屑灰岩的形态多种多样,可以随岩性不同而变化,构成锥形风成沉积岩和圆柱形微生物岩。在南邦,锥形风成砂屑灰岩大量溶解,最后形成大量石英碎屑,石英碎屑经再沉积掩埋再形成这些锥状风成砂屑灰岩,属于风成岩溶作用,发生在70ka前;340~380ka间风成砂屑灰岩发育要弱。     

风成碳酸盐岩的全球分布及其对西沙的启示

风成碳酸盐岩作为一种独特的海岸地貌在全球中纬度地区广泛分布,在全球气候分带上多属于气压带与风带交替控制的地中海气候、热带草原和热带沙漠气候区,与全球气候带的吻合较好。风成碳酸盐岩在各个时代均可发育,但以第四纪更新世风成碳酸盐岩最为常见。风成碳酸盐岩的发育主要受气候背景的影响,还受海岸地貌背景及浅海碳酸盐岩生产力的制约,并与全球海平面变化关系密切,相对而言在海平面高位期发育更好。西沙石岛更新世风成碳酸盐岩是热带海洋季风气候背景下发育起来的少数实例之一,是东亚季风的产物。石岛风成碳酸盐岩的存在可能反映了该区晚更新世相对干旱的气候条件。石岛风成碳酸盐岩与古土壤的旋回变化可能反映了气候背景的干湿变化或海平面的波动,其成因机理的深入揭示对南海西北部东亚季风及古海洋的变化研究具有重要的价值。     

卫星多光谱生物礁沉积相编图技术及其在大巴哈马滩的应用

现代沉积过程与古代环境相类似,因而地质学家将现代碳酸盐岩台地作为获得沉积物分布特征空间数据的天然实验室,通过卫星多光谱资料精确描绘和模拟现代碳酸盐岩沉积相的横向分布有助于地质学家更好地表达和理解大范围岛礁区的碳酸盐岩沉积相特征.随着遥感技术的不断发展,利用成像光谱理论进行对地观测的技术也日渐成熟.本文介绍了利用卫星多光...     

Sedimentary facies and evolution of aeolianites on Shidao Island, Xisha Islands

The aeolianite deposits on Shidao Island of the Xisha Islands,the South China Sea,contain five stages of aeolian biocalcarenites and four paleosols.The aeolian biocalcarenites consist of two sedimentary facies:dune and interdune deposits.In the dunes,large-scale festoon cross-bedding,humped cross-bedding and high-angle foreset bedding are well developed,and in the interdunes,large-scale flat-bedding and low-angle wedge shaped cross-bedding are well developed.The sedimentary structures and lamella features indicate that the aeolian deposits are driven mainly by the northeast monsoon.The aeolian biocalcarenite and paleosols may reflect the arid and humid climates of the East Asian monsoon,respectively.By comparison with the stalagmite oxygen isotope climosequence of Hulu Cave,Nanjing,we inferred that the aeolianite formed in the last glacial stage,and the paleosols were formed during relatively long-term warm events.