泗河冲洪积扇松散岩土体地温场自恢复能力研究

泗河冲洪积扇区域分布厚层松散岩土体,浅层地温能开发利用潜力巨大,查明地温场的温度自恢复能力并分析其影响因素,对地源热泵工程换热器的设计具有重要参考价值。笔者开展了多组现场热响应试验,并采用高精度测温线缆,长期监测地埋管换热器周边不同岩性、不同深度岩土体温度变化情况,以查明其变化规律。研究表明:在同种工况下,砂性土的温度恢复能力要远强于粘性土,地温的恢复主要发生在负荷停止的初期。研究区粘性土温度自恢复能力差,岩土体热物性参数、地下水径流条件、埋管循环水温度、气温及变温带深度是影响地温场恢复能力的因素。     

大定源回线装置瞬变电磁法在浅层煤矿采空区勘查中的应用

煤矿采空区土地已成为可持续发展的重要资源,浅层煤矿采空区探测在城市规划中显得日益重要.本文采用大定源回线装置瞬变电磁法对浅层煤矿采空区进行勘查,结合具体工程案例选用合理的施工参数,对野外采集数据进行视电阻率计算并绘制成图,利用视电阻率等值线扰动异常圈定采空区位置,指导钻孔布设,解译成果与地质资料及钻孔揭露地层基本吻合....     

Experimental study on nucleation process of stick-slip instability on homogeneous and non-homogeneous faults

The nucleation process of stick-slip instability was analyzed based on the experimental measurements of strain and fault slip on homogeneous and non-homogeneous faults. The results show that the nucleation process of stick-slip on the homogeneous fault is of weak slip-weakening behavior under constant loading point velocity. The existence of a short “weak segment” on the fault makes slip-weakening phenomenon in nucleation process more obvious, while the existence of a long “weak segment” on the fault makes the nucleation process changed. The nucleation is characterized by accelerating slip in a local region and rapid increase of shear stress along the fault in this case, which is more coincident with the rate and state friction law. During the period when fault is locked, increasing of shear stress causes lateral elastic dilation near the fault, and the rebound of the dilation at the time of instability causes an instantaneous increase of normal stress in the fault plane, which is an important factor making fault be rapidly locked and its strength recovered.     

广西大容山—十万大山花岗岩岩基地质年代表

对广西大容山一十万大山花岗岩岩基按单元和超单元的概念划分出石南、葵山、六万山和旺冲四个超单元,前三个超单元又可归并为大容山一十万大山岩群。主要采用~(40)Ar/~(39)Ar阶段升温法和K-Ar稀释法对单元和超单元进行系统的年代学研究,并编制出该区花岗岩同位素地质年代表。年代表说明,大容山一十万大山岩群侵位时间从晚二叠世258Ma,持续时间约27Ma;该岩群各超单元存在并列演化的特点。旺冲超单元形成于早二叠世259Ma.     

Effects of UV-B radiation and different light repair conditions on the early development of the tetraspores of Chondrus ocellatus Holm

The effects of exposure to UV-B radiation,280-315 nm,and dark or dark repair conditions on the early development of Chondrus ocellatus Holm collected from Qingdao coast were studied under the laboratory condition.After being exposed to different doses [0,36,72,108,144 and 180 J/(m 2 · d)] of UV-B radiation,one treatment of tetraspores were put back to normal culture condition (PAR),the other treatment were put into dark condition to repair for 2 h.During the cultivation,the diameter of the tetraspores were recorded every 4 d till the 50th day when vertical branches formed in all treatments.Then at the 50th day,CPDs,phycoerythrin,chlorophyll a and MAAs (Palythine and asterina-330) were measured.The results showed that low doses UV-B radiation could significantly accelerate the growth rate of the tetraspores of C.ocellatus and the growth rate reduced gradually with UV-B radiation keep on increasing.The variation trend of both the phycoerythrin and chlorophyll a concentration reduced significantly ( P < 0.05) once given the UV-B radiation. Under UV-B stress,the CPDs were induced,and the concentrations of CPDs were significant low in dark repair groups.The data of MAAs analyzed by LC/MS in the tetraspores of C. ocellatus suggested that there were two MAAs formed (palythine and asterina-330) after UV-B radiation induced, and low dose of UV-B irradiation could significantly induced the concentration of MAAs.From the growth and development state of the tetraspores,negative effects of UV-B radiation on the dark repair groups were more serious than PAR.     

CSAMT法在铝土矿调查评价项目中的应用研究

采用V8多功能电法工作站在河南新安石寺北冶地区铝土矿调查评价项目中进行可控源音频大地电磁测深（CSAMT）。CSAMT法凭借其抗干扰能力强、探测深度大、资料解释手段成熟等特点,在铝土矿调查评价项目中起到了至关重要的作用。它清晰地反映了调查区铝土矿含矿目标层、奥陶系古风化壳形态沿走向的变化情况以及地层的产状,为地层的划分及后续铝土矿调查评价工作提供了深部电性信息,为钻孔布设和矿产预测提供了依据。     

The Role of Ocean Dynamics in the Cross-equatorial Energy Transport under a Thermal Forcing in the Southern Ocean

Under external heating forcing in the Southern Ocean, climate models project anomalous northward atmosphere heat transport (AHT) across the equator, accompanied by a southward shift of the intertropical convergence zone (ITCZ). Comparison between a fully coupled and a slab ocean model shows that the inclusion of active ocean dynamics tends to partition the cross-equatorial energy transport and significantly reduce the ITCZ shift response by a factor of 10, a finding which supports previous studies. To understand how ocean dynamics damps the ITCZ's response to an imposed thermal heating in the Southern Ocean, we examine the ocean heat transport (OHT) and ocean circulation responses in a set of fully coupled experiments. Results show that both the Indo-Pacific and the Atlantic contribute to transport energy across the equator mainly through its Eulerian-mean component. However, different from previous studies that linked the changes in OHT to the changes in the wind-driven subtropical cells or the Atlantic meridional overturning circulation (AMOC), our results show that the cross-equatorial OHT anomaly is due to a broad clockwise overturning circulation anomaly below the subtropical cells (approximately bounded by the 5℃ to 20℃ isotherms and 50°S to 10°N). Further elimination of the wind-driven component, conducted by prescribing the climatological wind stress in the Southern Ocean heat perturbation experiments, leads to little change in OHT, suggesting that the OHT response is predominantly thermohaline-driven by air-sea thermal interactions.     

内蒙古新生代玄武岩年代学初步研究

对内蒙地区新生代玄武岩进行了系统的钾氩法年代学研究。其中赤峰岩区采样14个，集宁岩区15个，阿巴嗄岩区21个。年龄测定用MM1200B质谱计进行。^40Ar和^38Ar的测定误差为0．1－0．05％，^36Ar为1－5％。年龄测定误差一般为5－10％（1σ）。结果表明，该区新生代玄武岩活动在渐新世33－28Ma首先从赤峰和集宁两岩区开始，并逐步向西北方向依次扩展到阿巴嘎北部台地喷发结束。至于阿中巴嘎南部台地则一直延续至更新世0．33Ma左右喷发才告终。     

含电气石试样中红柱石的快速分析

研究了含电气石等难溶硅酸盐试样中红柱石的分析方法。样品经９８０℃高温灼烧后,电气石能被ＨＦ－Ｈ＿２ＳＯ＿４混合溶液定量溶解分离,而红柱石的溶解率很小。３７℃±１℃水浴浸取９０ｍｉｎ,能得到满意结果。方法简便快速,其相对标准偏差（ＲＳＤ,ｎ＝１０）为０．８６％。     

济宁中心城区建设用地规划与煤炭资源压覆可持续发展研究

文章介绍了济宁中心城区规划、中心城区规划压覆煤炭资源储量和压覆土地面积的基本情况,对土地和压覆煤炭资源的开发利用进行了对比分析,阐述了中心城区规划与煤炭资源压覆矛盾的影响,提出了相应的对策和建议。