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崂山顶、涧、沟、坡、麓、滩、岬-带巨砾成因研究 总被引：2，自引：1，他引：2
崂山的地貌景观十分复杂，形成众多的奇山异石。研究发现：更新世期间，崂山发生过多次古冰川作用．从水下到山巅都留下古冰川活动的印记。崂山的冰碛物具有不成层、无分选、杂乱无章、大小不一、由带有磨光面的、个体差别很大的和带有棱角的岩块、砂等堆积而成，部分冰碛物伸入海下。崂山古冰川冰碛物的堆积地貌主要有终碛堤、冰碛丘陵和侧碛堤三种类型。崂山古冰川侵蚀地貌有：(1)拖蚀(拔蚀)岩块；(2)磨光面；(3)古冰斗；(4)“刃脊”、角峰、哑口；(5)削断山嘴“U”型谷；(6)冰臼。崂山低海拔古冰川遗迹的发现，对研究崂山地貌演化和第四纪黄渤海陆架环境变迁。具有十分重要意义。 相似文献
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2003年12月由海洋出版社出版的李乃胜、石学法、赵松龄、于洪军等著的《崂山地质与古冰川研究》新书,是一本有独到见解与科学创新的大作。它是迄今为止,对崂山研究最为详尽的第一部崂山地质地貌的科学专著。作者发现,崂山具有中国东部保存最为完好的冰川遗迹,发育了典型的冰川侵蚀和堆积地貌,拥有中国东部罕见的、大规模的滨海冰碛物质。崂山古冰川遗迹保存的规模,远超过庐山和黄山,崂山发育了中国目前发现的惟一的一段冰碛海岸,有独一无二的冰碛海滩;有海拔最低的古冰舌;有大量多姿多态的冰臼;有冰舌前缘巨砾形成的小岛群;有种类繁多的冰碛… 相似文献
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2003年12月由海洋出版社出版的李乃胜、石学法、赵松龄、于洪军等著的《崂山地质与古冰川研究)新书，是一本有独到见解与科学创新的大作。它是迄今为止，对崂山研究最为详尽的第一部崂山地质地貌的科学专著。 相似文献
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海蚀作用会诱发各种地质灾害,为研究青岛崂山地区的海蚀作用,本研究通过野外踏勘取样、岩石手标本鉴定和偏光显微镜下薄片鉴定分析等方法,分析了岩石学和构造特征对海蚀作用的影响,并以石老人地区为例分析了海蚀地貌的特征,探讨了崂山地区的海蚀地貌分布特征及影响因素。结果表明:崂山海岸基岩为I-A型复合花岗岩。抗海蚀能力最强的是白垩系莱阳群砂岩,其次为白垩系青山群火山岩和石英二长岩,再次为碱性花岗岩,黑云二长岩最弱。断裂构造破坏岩石稳定性,促进了海蚀作用;石老人地区以流纹岩为主,在海蚀崖后退过程中,安山岩的侵入体保留下来,形成了石老人海蚀柱;崂山地区发育多种海蚀地貌,受到海浪作用、气温条件、盐类结晶以及生物作用等外部因素影响。 相似文献
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赵松龄 《海洋地质与第四纪地质》1988,(1)
国际地质对比计划第200号项目的研究内容为:晚第四纪海面变化、测量、对比及其应用.该项目的最终会议已于1987年7月20日至30日,在加拿大东部的哈里弗克斯市(Halifax)举行,来自28个国家,约有60多位科学家赴会.中国工作组正、副组长秦蕴珊、谢在团,秘书长赵松龄应邀参加了会议.这次会议分两阶段进行,从7月20日至26日为野外地质旅行时间,代表们考察了芬德湾(Fundy Bay)及其附近的大陆冰川堆积地貌、大陆冰川区海面变化遗迹和古岸线变迁的证据.经过一周的实地考察,给来自世界各地的同行,留下了深刻的印象.从7月27日至7月30日,代表们在哈里弗克斯市的达尔赫斯(Dalhousie)大学进行了学术交流,45位科学家在会议上作了科学报告,展示了各国对该项目研究的最新成果. 相似文献
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1982年秋于苏北阜宁县缺口-沙缺口砂堤外侧砂矿开采坑內,作者发现一件由浪流搬运在岸边停积的巨大漂木(图1)。从其所处位置的地貌形态、岩性结构及漂木~(14)C年龄测定结果来看,均说明该地古砂堤为冰后期海侵最 相似文献
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滨州贝壳堤岛与湿地国家级自然保护区内的贝壳堤是世界三大古贝壳堤之一,是世界上保存最完整、唯一新老并存的贝壳堤。文章基于RS、GIS技术及2015年野外实地调查数据,利用1979年、1990年、2000年、2008年和2015年5期Landsat陆地卫星系列等多源遥感数据,得到近40年来滨州贝壳堤岛与湿地国家级自然保护区贝壳堤的变化特征。结果表明:(1)2015年滨州贝壳堤总面积为28.86hm~2,是研究区总面积的0.07%,主要分布在研究区北部海岸的核心区;(2)1979—2015年,贝壳堤面积总体呈现下降趋势,尤其2008—2015年面积锐减,减少原因主要是人类开发利用,其中,农业用地、盐田和养殖场是本研究区最主要的3种人类开发利用活动类型;(3)建立自然保护区人类活动遥感核查体系、完善自然保护区相关法律法规、修复贝壳堤生境是应对滨州贝壳堤遭受侵占及破坏的有效管护对策。 相似文献
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华南全新世海滩岩及其古地理意义 总被引：17，自引：2，他引：17
李平日 《海洋地质与第四纪地质》1988,(4)
闽、粤、桂、琼已发现全新世海滩岩不少于44处.(14)~C测年表明,大部分为中全新世,其中以距今4000—200年的为最多,表明中全新世晚期至晚全新世早期是华南海滩岩的主要形成期.这些全新世海滩岩反映下列四方面的古地理意义:海岸线变迁;海平面变化;动力条件的变化;新构造运动.讨论了海滩岩与海岸沙丘岩的相似性与差异性、明确区别海滩岩与珊瑚礁或沙堤中的贝壳、分清海面升降还是堆积扩展等问题. 相似文献
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地质矿产部海洋地质研究所最近在黄河口地区的海岸带调查中发现数条古贝壳堤.长数十公里,宽数百米,厚度较大,十分稳定,埋藏较浅.这些古贝壳堤沿西北走向进入河北省境内,并可能与歧口贝壳堤、巨葛庄贝壳堤、天津育婴堂贝壳堤相连.贝壳堤具向上变细的层序,发育冲洗交错层理和风暴层理.向海一侧陡,向陆一侧缓.其展布方向明显地受风浪和潮流控制.在贝壳堤的向陆一方往往伴随有发育较差的泻湖和滨后沼泽.组成贝壳堤的贝类主要有石蛤、金蛤、文蛤、日本镜蛤、米蛤、锥螺、蛏、牡蛎等.以贝壳碎屑为主.贝壳堤中含少量砂,以石英为主,分选好,磨圆程度甚高,在石英砂中磁铁矿含量较高,显然古贝壳堤是高能环境的产物.从地层层序上看,古贝壳堤以及现在沿低潮线正在发育的贝壳堤,均盖在三角洲河流沉积之上,所以从广意上说,它是海进过程的产物,是相对稳定一轻微蚀退海岸的低潮线的标志.古贝壳堤又往往为沼泽和泻湖相沉积所覆盖.其上为三角洲平原相的河流和分流问沉积.表现了一个完整的海退层序. 相似文献
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From May to July, 1985, foulers on eleven navigation buoys have been surveyed in Shuidongand Bohe Harbours of Dianbai, Guangdong. Foulers on different parts of buoys (side, bottom and in-side tail tube) were sampled. The thickness and cover area of foulers were measured in the field andall the foulers on an area of 30×30 cm~2 were taken back for lab. identification. Thirty-four quatita-tive samples and several qualitative samples have been got and five hundred and twenty-four sampleshave been classified. 相似文献
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The potential for western mosquitofish, Gambusia affinis, to negatively affect populations of black mudfish in New Zealand wetlands was investigated with annual fishing surveys of the Whangamarino wetland and by laboratory experiments evaluating competition and predation of mosquitofish on mudfish adults and larvae. Abundance of mudfish juveniles was reduced in the presence of mosquitofish at marginal wetland sites close to permanent water, but mosquitofish were not found at ephemeral adult mudfish habitats. In constructed wetland microcosms, mosquitofish reduced both growth and condition of post‐larval mudfish but did not attack or kill mudfish. In laboratory aquaria, mosquitofish rapidly consumed mudfish fry but survival time of the latter was significantly extended by an increase in density of submerged structures and by the presence of an alternative food source for mosquitofish. Because mosquitofish cannot survive in ephemeral wetlands that dry over summer, the impacts of mosquitofish on mudfish are likely to be minimal except in habitats where mosquitofish can survive year‐round owing to the presence of permanent standing water. 相似文献
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Discussion on Coastal Erosion Near Xizhuang, Penglai, China 总被引：1，自引：0，他引：1
Wu Guiqiu Li Wei Professor First Institute of Oceanography State Oceanic Administration Qingdao Associate Researcher 《中国海洋工程》1994,(2)
-In this work, on the basis of the characteristics of coastal erosion near Xizhuang (Penglai, Shandong, China) and the in-situ measured data and theoretical calculation, the causes of coastal erosion there are obtained: (1) natural erosion, (2) beach sand borrowing, and (3) sand borrowing at the Dengzhou shoal near Xizhuang, which results in the loss of the function of the wave force resistance of the shoal. Since the wave energy is increased, the longshore sediment transport rate is increased. Coastal erosions are more and more serious. A scientific basis to reduced the calamity of coastal erosion in local area is presented. Some experiences are accumulated for studying coastal erosion. 相似文献
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As a result of mooring of autonomous seabed stations in bays of Shikotan Island, the records of two tsunamis were obtained from strong earthquakes that occurred off the coast of Chile on April 1, 2014, and September 16, 2015. In both cases, prolonged intense vibrations with a pronounced group structure were observed in various bays, mainly with periods of the main modes of resonance oscillations. The second event was more dangerous, and the wave height was 0.9 m at Malokurilskaya Bay. The increase in the energy of fluctuations in 2015 was more significant, manifesting itself in a wider range of periods. Numerical simulation of the tsunami showed that the nature of wave propagation in both earthquakes was identical in the northern part of the Pacific Ocean, approaching Russia’s Pacific coast, and was characterized by weak damping, in contrast to waves propagating to the south and southwest. This explains why expect large waves can be expected on the coasts of the Kurils from earthquakes off the coast of South America, despite the considerable distance. 相似文献
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20 0 0年 10月～ 2 0 0 1年 12月 ,对青岛太平角养殖海区的贻贝寄生中华豆蟹的感染情况进行了调查。以肥满指数为指标 ,通过对感染和未感染贻贝的比较 ,分析了中华豆蟹对贻贝的危害程度。结果表明 ,中华豆蟹对贻贝的感染率为 2 .0 %～ 2 0 .4 %。2 0 0 0年 11月和 2 0 0 1年 11月出现 2次感染高峰 ,分别为 9.7%和 2 0 .4 % ;最低感染率出现于 2 0 0 1年 1月和 3月 (均为 2 .0 % )。感染强度为 1～ 5 ,多数为 1(占感染个体的 83.2 % )。贻贝所感染的豆蟹的性别及感染强度与宿主的大小有关。小个体贻贝仅见雄豆蟹感染 ,绝大多数雌豆蟹见于壳长大于 2 cm的贻贝。未发现同一宿主体内同时感染 2只或以上的雌豆蟹。在调查的 15个月中 ,有 11个月被感染贻贝的肥满度显著低于未感染的贻贝 ,且雌豆蟹对宿主肥满度的影响大于雄豆蟹 相似文献
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Karl A. Aiken G. Andre Kong Stephen Smikle Robin Mahon Richard Appeldoorn 《Ocean & Coastal Management》1999,42(12):67
The history, methods, problems and regulation of fishing of the last remaining large queen conch resource in the world, located on a Jamaican fishing bank, are examined. The fishery activities for the queen conch, Strombus gigas Linnaeus are briefly described with the main activities in the industrial sector which produce the bulk of the harvest, which is exported. There are a few large producers harvesting the single major fishing ground of Pedro Bank, southwest of Kingston. These fishers harvested at least 1500 t annually between 1992 and 1998. Management is by licensing, individual quotas and a close season from July to October. Regulations related to CITES are thought to greatly assist in making licensed harvesters provide catch data to the Fisheries Division. The industrial operators have provided funding to undertake stock assessment studies in 1994 and again in 1997. We highlight the focus on management on a participatory consensual approach with meetings with all players in the industry. The conch fishery is thought to be one of the few areas of the Jamaica fishery where there is close and successful collaboration between fishers and the Fisheries Division. It provides an example of how rapid, precautionary, participatory action can provide an adequate basis for management until more definitive scientific information becomes available. The status of the conch fishery is thought to be sustainable at present, once reductions are made to the annual quota. 相似文献
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赣榆县是全国首批沿海开放县、全国渔业百强县,是省建设“海上苏东”的重点县和省科技兴海示范县,发展海洋经济具有得天独厚的自然优势和较为雄厚的基础条件。全县海岸线长62.5千米,滩涂总面积23万亩,拥有全省最长的沙滩海岸,10米等深线浅海域108万亩,近海渔场7000平方千米,近岸水域有具较大 相似文献