胶东半岛温泉的地热特征     

金秉福  张云吉  栾光忠 《水文地质工程地质》2000,27(5):31-33,37

胶东半岛位于欧亚板块与太平洋板块边缘内侧,是地壳长期稳定缓慢隆起地段,区内地质构造发育,大部分温泉出露在背斜核部,ＮＥ、ＮＮＥ向与ＮＷ、ＮＮＷ向断裂交泯外,地热系统属中低温深循环对流型,略为偏高的大地热流是其主要热源,地表水是地下热水的补给水源,地下水通过发育在花岗岩和变质岩中的断层或断裂破碎带,下渗和深循环对流,在径流过程中不断吸取围岩热量成热水,沿断裂上升过程中,与地下浅部裂隙水混合而成为化学  相似文献   

南极菲尔德斯半岛湖泊沉积物的稀土地球化学          下载免费PDF全文

王一先  钱志鑫  郑洪汉 《极地研究》1996,8(2):38-44

本文研究了燕鸥湖、西湖和基太湖湖泊沉积物的稀土地球化学。这些湖泊沉积物的稀土分布模式与菲尔德斯半岛第三纪火山岩非常相似，它们的物质来源是菲尔德斯半岛岛弧火山岩。湖泊沉积相与冰碛层稀土模式的差异，反映了它们经历的化学风化程度不同、粘土含量不同。Ｃｅ异常意味着每个湖泊沉积旋回结束的阶段气候是比较干燥的。湖泊沉积物的稀土含量和分布模式变化小，也意味着在中晚更新世时气候是比较干燥的。  相似文献   

Note on Upper Cretaceous ostracods from south-western Morocco     

R. A. Reyment 《Cretaceous Research》1982,3(4):405-414

Cenomanian, Turonian and Coniacian ostracods from a borehole in the coastal zone of the Tarfayan Basin, south-western Morocco, display affinities with associations from Algeria, Tunisia and the Middle East as well as with the Iberian Peninsula. Relationships with central and southern West Africa are relatively slight, which could be a result of palaeoecological particularities.  相似文献   

New paleomagnetic results from the Aegean extensional province     

Haubold  Herbert  Scholger  Robert  Kondopoulou  Despina  Mauritsch  Hermann J. 《Geologie en Mijnbouw》1997,76(1-2):45-55

Various Oligocene formations from NE Greece (ignimbrites from the Medousa area, rhyolites from Zagradenia, granodiorites from Elatia) show discordant paleomagnetic signatures, in each case indicating small cw (clockwise) rotation and also inclination flattening. Marls from Pithion were partly remagnetized in a present-day field. Samples that contain ancient magnetization components also indicate small cw rotation and inclination flattening. However, the magnetization of andesites from Peplos reflects a considerably larger rotation, likely owing to local tectonics. In the context of previous work in the area, these results are used to propose a subdivision of NE Greece into four structural zones of distinctive rotational behaviour (from east to west): sites in zone 1, east of the Kavala-Xanthi-Komotini fault (KXK), show various cw and ccw (counterclockwise) rotation angles owing to complex kinematics resulting from the interaction of the KXK and the north-Anatolian fault zone. However, zone 2, between the KXK and the Strymon valley, is structurally homogeneous ( 10° cw rotation). The paleomagnetic signature of the Vertiskos massif (zone 3) implies a larger (> 30°) cw rotation, whereas sites in the Vardar basin (zone 4) contain a paleomagnetic signature similar to that of zone 2. This suggests a motion of the Vertiscos massif, a meta-ophiolitic nappe, relative to underlying strata. Indeed, zones 2 and 4 may be parts of the same structural unit which underlies this nappe.  相似文献   

南极乔治王岛菲尔德斯半岛几个地层划分命名问题之商榷          下载免费PDF全文

沈炎彬 《极地研究》1992,4(2):18-26

本文对菲尔德斯半岛群的划分提出了一个新的方案 ,时代从晚白垩世一直延续到中新世早期 ;新建立的半三角组系湖相沉积 ,孢粉及同位素年龄数据 (71 .3 +0 .3 Ma)均指示属晚白垩世后期 ,是目前所知菲尔德斯半岛出露最早的岩层 ,也是南极仅知的晚白垩世陆相沉积地层 ;据岩层区域分布、岩相及含古生物组分的差别 ,始新统化石山组可进而划分为上、下两部分 ,层型剖面仅代表该组下部地层 ,上部在别林斯高晋站油库附近出露较好 ;文中命名“苏菲尔角火山岩”以表示菲尔德斯半岛更新时代的火山活动 ,但尚需深入研究。  相似文献   

胶东半岛温泉的地热特征     

金秉福  张云吉  栾光忠 《地球科学与环境学报》2000,22(1)

胶东半岛位于欧亚板块与太平洋板块边缘内侧 ,是地壳长期稳定缓慢隆起地段 ,区内地质构造发育 ,大部分温泉出露在背斜核部 ,NE、NNE向与NW、NNW向断裂交汇处。地热系统属中低温深循环对流型 ,略为偏高的大地热流是其主要热源 ,地表水是地下热水的补给水源 ,地下水通过发育在花岗岩和变质岩中的断层或断裂破碎带 ,下渗和深循环对流 ,在径流过程中不断吸取围岩热量成为热水 ,沿断裂上升过程中 ,与地下浅部裂隙水混合而成为化学成分各异 ,温度高低不等的温泉水  相似文献   

辽东半岛及两侧海域深部构造,活动构造与地震关系研究     

钟以章  白云 《华北地震科学》1999,17(2):59-65

辽宁半岛及两侧海域地震活动频繁,地震活动在空间上显示有条带状,网络状和团块状等分布特征,本文通过地震活动与深部构造、活动构造关系的分析认为,莫氏面的形态、深断裂的发育特征和活动断裂的特殊部位等对地震分布起了控制作用,从而构成了多种空间分布图象。  相似文献   

英峰岭剖面红土的粘土矿物和化学特征与成土环境关系   总被引：18，自引：4，他引：14  

徐义芳  朱照宇 《地球化学》1999,28(3):281-288

地球化学与粘土矿物学研究表明,广东雷州半岛英峰岭多期红土是拉弱武岩红土化初级阶段的产物,由剖面底层至顶层,红土成熟度依次递增。各层红土中主要粘土矿物含量和粘土的Ｆｅ２Ｏ３含量,以及工土和粘土的氧化,淋溶,富铁铝等化学特征系数与红土埋深之间呈波动起伏的关系。  相似文献   

Preliminary study on development characteristics of planation surface in Liaodong Peninsula          下载免费PDF全文

Jin Shu-Chen  Li Yong-Hua  Wei Dong-Lan  Li Xin-Rui  Liu Da-Qi 《古地理学报》1999,22(4):715-726

Planation surface is one that is associated with long-term stable tectonic environment of large scale landscape. The planation surface with the weathering crust as a whole to study is the main stream of modern planation surface research. The red weathering crust mainly is outcropped in the east and west of Liaodong Peninsula,and its thickness is around 4 m. In order to explore the properties,environment and development characteristics of the planation surface in Liaodong Peninsula,chemical elements and particle size characteristics of red weathering crust in this area were studied. The test results showed that the average value of CIA of the red weathering crust in the study area is 82.70,the average value of ba((Na₂O+K₂O+CaO+MgO)/Al₂O₃)is 0.39,the average value of S/A(SiO₂/Al₂O₃)is 4.86,and the average value of clay content is 8.31%. Compared with the red weathering crust of the karst area in the south of China,it has the characteristics of low leaching rate of salt base,low aluminization degree and weak viscosification. According to the regional geomorphologic features,the development of red weathering crust in the study area mainly went through four stages: (1)karst process was carried out in the whole rock mass above the base level of ancient erosion,and the geomorphologic fluctuation gradually increased;(2)geomorphologic fluctuation reached the maximum,and covered karst and gray weathering crust began to develop;(3)karst double-layer planation surface basically formed;(4)the development of gray weathering crust nearly stopped. With the tectonic movement,the gray weathering crust,which was originally located below the base level of ancient erosion,was all elevated above the base level of modern erosion to form red weathering crust. Therefore,the planation surface in the study area is ancient planation surface,and the development stage is lateralization stage. The results can provide a preliminary basis for revealing the neotectonic movement and sea level change in the Liaodong Peninsula from the Neogene to present.  相似文献   

远东热点:朝鲜半岛形势分析   总被引：1，自引：0，他引：1  

刘养洁 《世界地理研究》2002,11(3):86-91

朝鲜半岛独特的地理位置，无论对周边的中，俄，日三国，还是对大洋彼岸的美国都具有十分重要的地缘战略意义。如果说这里是四大国利益相互交错的唯一地区，那么解决朝鲜半岛问题便不仅取决于半岛内部北，南双方的互动关系，而且取决于四大四的立场及东北亚政治地理格局的演变态势。近年来随着朝鲜北，南双方首脑的成功会晤，朝鲜半岛的和平统一进程迈出了实质性步伐。但由于朝鲜半岛问题牵涉面广，影响因素复杂，从而使半岛的和平统一进程出现了一波三折的复杂局面，本文从政治地理学角度对半岛形势进行了分析。供关心朝鲜半岛局势的同仁参考。  相似文献