苏皖下扬子区晚白垩世以来的构造-热历史：浦口组砂岩磷灰石裂变径迹证据     

张沛  周祖翼  许长海 《海洋地质译丛》2009,(4):26-32

对苏皖下扬子区上白垩统浦口组（K2P）的三个砂岩样品进行了磷灰石裂变径迹（AFT）研究。结果显示：2个样品的AFT合并年龄为（88．8±4．4）Ma（径迹长度为（12．0±0．3）μm）和（82．1±6．8）Ma（径迹长度为（14．4±0．3）μm）与浦口组沉积年龄相近，说明它们沉降的幅度达到但没有超过AFT部分退火区间，1个样品的AFT合并年龄（117．3±5．9）Ma（径迹长度为（13．3±0．3）μm）大于浦口组沉积年龄，代表物源区抬升、剥露的冷却年龄。根据热历史模拟结果，识别出黄桥事件（110～90Ma）、仪征事件（70～60Ma）和三垛事件（35～22Ma）三期重要的构造事件，并将下扬子区晚白垩世以来的盆地演化划分为四个阶段：110～70Ma断坳复合型伸展盆地、70～35Ma拉张断陷盆地、35～22Ma挤压抬升阶段和22Ma至今坳陷盆地。  相似文献   

济南北部地热田地热地质特征浅析   总被引：1，自引：0，他引：1  

李常锁  杨磊  高卫新  王少娟 《山东国土资源》2008,24(4):35-39

济南北部地热田地热资源类型属于层状裂隙岩溶型,热源是北部齐河-广饶断裂的沟通导热,盖层是第四系、新近系、石炭-二叠系、侏罗系.可利用的、具有开发价值的热储层为奥陶系灰岩热储,该热储层顶板埋深在700～2500m左右,热储层厚度由南向北逐渐增大,单井涌水量2000m3/d左右,孔口水温一般在38～57℃,地热田东部地热水矿化度1.4～3.5g/L左右,西部5.1～7.2g/L左右,地热水中富含氟、锶、偏硅酸等微量元素,具腐蚀性,结垢性弱,具较好的开发利用价值.经计算奥陶系热储层单井可采资源量为7.3×105m3/a,合理井间距为5000m.  相似文献   

几种因子对鞍带石斑鱼精子活力的影响   总被引：3，自引：0，他引：3  

梁伟峰  张海发  王云新  黄国光  黄培卫  沈南南 《广东海洋大学学报》2009,29(3):29-32

研究不同梯度的盐度、pH、温度及低温保存时间对鞍带石斑鱼精子活力的影响。结果表明:鞍带石斑鱼精子活力的适宜盐度范围为27.5～35.0,最适盐度为32.5,此时精子的快速运动时间和寿命分别为13.2min和14.8min;最适pH为8.5,精子的快速运动时间及寿命最长,分别达12.7min和17.3min;温度范围为27～31℃,以29℃时快速运动时间最长,达16.6min;在0～4℃冰箱保存6h后鞍带石斑鱼精子活力未显著降低,其中保存前精子快速运动时间为18.4min,保存6h后为18.2min,保存120h后仍有活力,精子快速运动时间为2.3min,精子激活率为3.3%。以x为保存时间,快速运动时间y和寿命y′符合线性方程y=-0.8334x+19.164(R2=0.9856),y′=-1.1358x+27.8(R2=0.9573)。  相似文献   

Detection of the End Point Temperature of Thermal Denatured Protein in Fish and Chicken Meat Through SDS-PAGE Eiectrophoresis     

GAO Hongwei MAO Mao LIANG Chengzhu LIN Chao XIANG Jianhai 《中国海洋大学学报(英文版)》2009,8(1)

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南京与Groesbcek,Tex.四季高空温度及其低减率之比较     

《气象学报》1943,(Z1)

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民国二十五年二月份各地气象通讯     

《气象学报》1936,12(3):167-179

厦门本月份厦门天气可以注意之处,计有二点,(一)为二十五日之初雷,按初雷即古之惊蛰节,查历本为三月六日,前後相差达十日焉。其二为打破记录之雨天日数,月中计晴天二日,昙天二日,阴天七日,雨天十八日,雨天之多,开十一年来之新记录,按去年二月份雨天日数仅九日,今适得其倍焉。以雨量论,本年二月196公厘尚为亚军,(民国十六年二月雨量420公厘)。  相似文献   

民国二十四年七月份各地气压温度雨量纪录     

《气象学报》1935,(2)

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甘肃肃州气象概况     

胡振铎 《气象学报》1936,12(8):446-449

国立中央研究院气象研究所肃州测候所自二十三年七月一日起开始观测,至今已有一年余之纪录,其逐日详细纪录已按月载於气象研究所出版之气象月刊中,兹仅择其概要述之如次: (一)气压:气压全年平均约在六四○公厘左右,以各月份平均比较,二十三年十月份为最高,二十四年七月份为最低,相差之数达十  相似文献   

湖州市冬季降雪的预报指标研究     

尹浩  李洪权  周之栩 《浙江气象》2022,(1):10-16

利用2007-2016年湖州国家基本气象观测站常规地面气象资料和NECP再分析资料(1°×1°),选取出现降雪的25个个例,通过统计分析方法和TS评分最优原则,确定降雪相态出现时各物理量的范围及阈值,得到了相态转变的判据。选取4次历史个例进行检验分析,同时结合实际业务运行情况发现,各类混合指标能够较好地区分降水相态的变化,TS评分均在0.7以上。研究结果能为湖州地区的预报业务和模式产品处理提供较好的参考。  相似文献   

Impacts of Climatic Factors on Runoff Coefficients in Source Regions of the Huanghe River   总被引：4，自引：0，他引：4  

CHEN Liqun LIU Changming LI Yanping WANG Guoqiang 《中国地理科学(英文版)》2007,17(1):047-055

Runoff coefficients of the source regions of the Huanghe River in 1956–2000 were analyzed in this paper. In the 1990s runoff of Tangnaihai Hydrologic Station of the Huanghe River experienced a serious decrease, which had at- tracted considerable attention. Climate changes have important impact on the water resources availability. From the view of water cycling, runoff coefficients are important indexes of water resources in a particular catchment. Kalinin baseflow separation technique was improved based on the characteristics of precipitation and streamflow. After the separation of runoff coefficient (R/P), baseflow coefficient (Br/P) and direct runoff coefficient (Dr/P) were estimated. Statistic analyses were applied to assessing the impact of precipitation and temperature on runoff coefficients (including Dr/P, Br/P and R/P). The results show that in the source regions of the Huanghe River, mean annual baseflow coefficient was higher than mean annual direct runoff coefficient. Annual runoff coefficients were in direct proportion to annual pre- cipitation and in inverse proportion to annual mean temperature. The decrease of runoff coefficients in the 1990s was closely related to the decrease in precipitation and increase in temperature in the same period. Over different sub-basins of the source regions of the Huanghe River, runoff coefficients responded differently to precipitation and temperature. In the area above Jimai Hydrologic Station where annual mean temperature is –3.9oC, temperature is the main factor in- fluencing the runoff coefficients. Runoff coefficients were in inverse relation to temperature, and precipitation had nearly no impact on runoff coefficients. In subbasin between Jimai and Maqu Hydrologic Station Dr/P was mainly affected by precipitation while R/P and Br/P were both significantly influenced by precipitation and temperature. In the area be-tween Maqu and Tangnaihai hydrologic stations all the three runoff coefficients increased with the rising of annual precipitation, while direct runoff coefficient was inversely proportional to temperature. In the source regions of the Huanghe River with the increase of average annual temperature, the impacts of temperature on runoff coefficients be-come insignificant.  相似文献