大板金矿“港湾成矿”模式探讨     

杨晓波 《国土资源》2000,(1)

自 8 0年代末 ,辽宁西部排山楼金矿发现以来 ,对于同韧性剪切带型金矿床的赋存规律一直引起广大地质工作者的重视。通过对大板、老虎沟、樱桃沟等金矿的初步研究表明 ,采用微观和宏观相互结合、相互映衬的指导思想 ,针对韧性剪切带动力机制进行思考 ,认为闾山造山带中北北东向和东西向两个方向的剪切带为一期韧性剪切构造作用的产物 ,形成时间为印支末期—燕山早期 ,其区域构造样式为共轭式韧性剪切带 ,呈网结状。含金矿液的沉淀作用一般发生于韧性剪切带的网结点处附近 ,较大型的金矿床应赋存于韧性剪切带中刚性体周围 ,尤其是首尾等“港湾”处 ,即“港湾成矿”。  相似文献   

Vertical distribution of New Zealand shipworms (Bivalvia: Teredinidae)     

J. L. McKoy 《新西兰海洋与淡水研究杂志》2013,47(4):403-409

In Tauranga Harbour, Lyrodus medilobatus was found in greatest numbers on test‐blocks placed near the bottom, while Bankia australis, B. neztalia, and Nototeredo edax had a more uniform vertical distribution. Shipworms occurred in the intertidal zone up to about mean sea level. In Wellington Harbour, B. neztalia was found in test‐blocks up to mean sea level, but was most abundant in blocks near the bottom. In the Bay of Islands, shipworms settled in the intertidal on test‐blocks as high as 30 cm below mean sea level. B. australis was the most abundant species in mangrove wood in northern New Zealand, and L. medilobatus occurred occasionally. No evidence was found for shipworms settling on living mangrove wood, although they frequently tunnelled from dead wood into living wood.  相似文献   

Seasonal settlement of shipworms (Bivalvia: Teredinidae) in Tauranga Harbour and Wellington Harbour     

J. L. McKoy 《新西兰海洋与淡水研究杂志》2013,47(2):171-180

The seasons of settlement of shipworms in Tauranga and Wellington harbours in 1970–72 were studied using Pinus radiata test‐blocks. At Wellington the seasonal abundance of late‐stage shipworm larvae was monitored in the plankton. In Tauranga Harbour Bankia australis, Lyrodus medilobatus, Lyrodus pedicellatus, and Nototeredo edaxspawned and settled predominantly in summer, when water temperatures were above 17–18°C. Bankia neztalia had peak periods of settlement in winter and early summer and there was no correlation of settlement with water temperature. In Wellington Harbour B. neztalia spawned and settled mainly during winter when water temperatures were 11–15°C. Total larval abundance at the 2 test sites in Wellington Harbour was an approximate indication of the relative intensity of settlement, but seasonal larval abundance did not correlate well with seasonal settlement. B. neztalia larvae settled on air‐dried Pinus radiata wood within 6 days of the immersion of the wood. Annual variations in patterns of settlement of shipworms in the 2 harbours are related to variations in water temperatures.  相似文献   

浙江海岛港口建设初探     

逢自安 《海洋学研究》1991,9(1):72-79

本文从海岛开发的特殊战略意义,论述了浙江海岛的成因类型、基本特征以及建港条件,并对海岛港口的建设作了初步探讨。  相似文献   

Interactions between harbour seals, Phoca vitulina, and fisheries in complex coastal waters explored by combined Geographic Information System (GIS) and energetics modelling     

Bjorge  Arne; Bekkby  Trine; Bakkestuen  Vegar; Framstad  Erik 《ICES Journal of Marine Science》2002,59(1):29-42

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加快港口发展建设“海上射阳”     

杨开良 《海岸工程》1996,15(4):33-36

概述了射阳港对江苏省经济建设和对外贸易的重要地位，阐述了射阳港的发展现状和进一步发展的规划及目标，提出了实现这些目标的具体做法和措施。  相似文献   

青岛形成新亚欧陆桥桥头堡的展望兼论形成集装箱运输枢纽港     

牛承章 《海岸工程》1996,15(4):27-32

分析了青岛优越的港湾条件，独特的地理位置和良好的国际环境，进一步论证了青岛港在形成集装箱的国际过境运输和转口运输中心的优势，认为青岛港将形成集装箱运输的枢纽中心。  相似文献   

港口工程中有关波浪问题的实用计算系统     

徐宏明 《海洋工程》1994,(1)

港口工程中，波浪是一个非常重要的问题，港工建筑物的设计、港口平面布局的确定、航道淤积量的计算等均需了解和掌握本海区的波浪情况，所以编制本系统的宗旨就是使由外海波浪要素推算到港区泊稳计算等一系列繁琐复杂的波浪推算工作都尽可能地通过计算机来实现，从而减轻工作强度、提高工作效率。该系统目前包括五个模块、即外海波浪要素推算模块，Ｐ－Ⅲ型适线分析模块，浪波浅水变形计算模块、港区波浪绕射计算模块和不同累积频率波高换算模块。从本系统在国内几个港口中的使用情况来看，计算结果是令人满意的。  相似文献   

厦门海港公园工程厦门湾潮汐水流物理模型馆有关问题研究     

徐啸 《台湾海峡》2005,24(4):455-462

本文首先介绍了潮汐水流整体物理模型的作用和功能，讨论目前在厦门海港公园建设厦门潮流模型实验室的意义和作用．通过对国内一些类似大型实验室情况的介绍，提出厦门潮流模型的设计方案；根据实际需要，建议分两期实施．最后指出，物理模型试验是非常专业化的工作，模型馆正常运转的关键是运作体制和人才培养．  相似文献   

人类工程活动对秦皇岛海滩侵蚀及淤积的影响   总被引：2，自引：0，他引：2  

冯金良 《海岸工程》1997,16(3):41-46

秦皇岛地区旅游性海滩的侵蚀主要是人类所实施的以水库为主的河流水利工程而产生的海岸效应。在区域性海滩普遍遭受侵蚀状态下，沿海港口工程又通过三种不同形式第滩发育施以影响，其一是对沿岸泥沙流的拦阻，其二为在局部岸段形成完全或不完全波影区，其三为人工岬湾的形成，港工引成的海滩淤积体特征是海滩变宽、变缓及海滩砂细化。文中最后讨论了侵蚀性海滩向演化的发育空间问题。  相似文献