New discovery of seafloor hydrothermal activity on the Indian Ocean Carlsberg Ridge and Southern North Atlantic Ridge—progress during the 26th Chinese COMRA cruise

The 26th Chinese COMRA (China Ocean Mineral Resources Research & Development Association) cruise was an important cruise. The Carlsberg Ridge (CR) of the Northwest Indian Ocean and the North Atlantic Ridge (NAR), in which less investigation has been carried out for hydrothermal activities, were investigated and studied during the first two legs of the 26th COMRA cruise. During the first leg, we found one hydrothermal activity field located in the CR at 3.5 -3.8 N on the Northwest Indian Ocean Ridge (NWIR), and sampled seafloor polymetallic sulfide deposits where only abnormalities were found before. During the second leg, we found a new hydrothermal anomaly field located in the NAR at 4 -7 N. The discovery of two hydrothermal and anomaly fields filled in the gap of hydrothermal investigation and study in the corresponding regions for China.     

基于共存分析法和叶缘分析法重建中国渐新世年均温

渐新世全球气候总体上发生了降温,代表着地球新生代早期的一个"冰室"。植物对气候变化反应敏感,作为地质时期的产物,植物化石能够反映当时陆地气候的变迁。本文利用共存分析法(Coexistence Approach,CA)对中国5个渐新世植物群的年均温进行了恢复,并利用叶缘分析法(Leaf Margin Analysis,LMA)对其中木本双子叶植物不少于15种的4个植物群年均温进行了分析。两类方法的推测值整体表现为CA的年均温相对高于LMA值,其中叶缘分析法东亚模型得出的年均温高于中国模型值。通过对能影响两类方法结果的因素分析,推测CA恢复的值能更好地代表化石点当时的年均温,咸水河组下段植物群为13.3~15.6℃,杨连屯组大桥段植物群为12.1~19.4℃,三合植物群为14.3~16.8℃,景谷植物群为19.7~23.7℃,宁明组植物群为22.0~23.6℃。由于CA恢复的年均温都高于当地现在的年均温,推测渐新世时,虽然全球温度自始新世以来整体相对降低,但还是比现在温暖。     

上海地区全新世海平面的变化

本文通过对位于上海冈身西侧的赵巷孔进行孢粉和微古分析，论述上海地区全新世海平面变化，上海地区在全新世时期海平面经历6次波动，3次海平面上升，3次海平面下降，在7000-6000a,B.P气候最佳时期上海地区海平面表现出升中有降的现象，本文对这一短暂的海退现象作了简要的分析。     

浅谈地质资料在新形势下的利用

《地质资料管理条例》的实施,为搞好地质资料社会公开化提供了有利条件,发挥地质资料馆藏资源优势,实现信息资源共享是今后的工作方向。     

Impacts of climate change on cotton yield in China from 1961 to 2010 based on provincial data

To develop scientific countermeasures,the impacts of climate change on cotton yield during 1961-2010in three major cotton-producing regions of China were studied by using the available provincial data.The results indicate that(1)a rise in average temperature increased the cotton yield in most provinces of Northwest China and the Yellow River valley;however,the rise in average temperature decreased the cotton yield in the Yangtze River valley.Moreover,cotton production across the entire study region was reduced by approximately 0.1%relative to the average during 1961-2010.(2)A decrease in diurnal temperature range(DTR)reduced cotton yield in some provinces,while a beneficial DTR effect was observed in the other provinces.Changes in DTR resulted in an average decrease in production by approximatly 5.5%across the entire study region.(3)A change in the amount of precipitation increased the cotton yield in some provinces;however,it caused a decrease in other provinces.The decrease in average production due to the change in precipitation was approximately 1.1%.We concluded that the changes in temperature and precipitation decreased cotton yields in China,while beneficial effects of temperature and precipitation existed in the cotton-growing regions of Northwest China during 1961-2010.     

济阳坳陷下古生界碳酸盐岩的分子有机地球化学特征

本文主要针对济阳坳陷车古、义古和桩古潜山带若干钻井的下古生界碳酸盐岩样品,开展分子有机地球化学研究。研究主要揭示了下古生界碳酸盐岩氯仿沥青A中的生标组成及其碳同位素特征,可为环渤海地区下古生界潜在的原生油气藏的判识提供依据;同时研究表明碳酸盐岩晶包有机质中正构烷烃的分布和碳同位素组成与氯仿沥青A中的存在明显差异,早期有机质的特征仍被保留在晶包有机质中,因此可用于古沉积环境的探讨。     

基于血清非靶向代谢组学研究肝喜片抗肿瘤的作用机制

目的：利用超高效液相-质谱联用技术（UPLC-MS/MS）研究肝喜片在大鼠血清中的代谢调节机制。方法：将30只雄性SD大鼠随机分为对照组、肝喜片低剂量组（0.81 g/kg）、肝喜片高剂量组（4.05 g/kg）,每组各10只,连续给药7 d后腹主动脉采血,采用UPLC-MS/MS检测血清代谢物变化情况。结果：对照组和给药组的代谢轮廓具有明显变化,通过设定VIP值＞1、P<0.05阈值筛选差异代谢物。肝喜片低剂量组与对照组之间差异代谢物主要有40种,肝喜片高剂量组与对照组之间差异代谢物主要有77种,3组之间共有的差异代谢物有26个,其中涉及到的代谢途径主要包括戊糖和葡萄糖醛酸的相互转化、色氨酸代谢和类固醇激素生物合成。结论：肝喜片抗肿瘤的作用机制可能与戊糖和葡萄糖醛酸的相互转化、色氨酸代谢和类固醇激素生物合成等代谢途径调控有关。利用代谢组学方法研究差异代谢物变化可以为抗肿瘤提供治疗靶点。     

云南地震预警信息发布效能分析——以漾濞6.4级、双柏5.1级和盈江5.0级地震为例

地震预警信息发布是预警“一张网”的重要组成部分,解决了预警系统“最后一公里”的问题。在2021年5月21日漾濞6.4级地震、6月10日双柏5.1级地震和6月12日盈江5.0级地震中,云南地震预警信息发布系统对产出的预警信息进行了有效发布,地震预警终端有效响应。本文借助这三次地震对云南地震预警发布系统运行质量、预警终端响应结果以及预警响应效果进行详细分析。结果表明：云南地震预警信息发布系统满足时效性要求并具有良好的稳定性,预警终端接收到的预测烈度与实际结果基本一致,已经具备一定的地震预警信息发布能力。     

裂缝暂堵转向重复压裂技术

针对中原油田以往的压裂工艺中单纯采用延伸原有裂缝的常规重复压裂,裂缝所控制的泄油区内的原油采出程度高,但泄油区外的大量剩余油动用程度较低的特点,研制了应用化学暂堵控制剂使流体在地层中发生转向,压裂液进入高应力区或新裂缝层,促使新缝的产生和支撑剂的铺置变化。通过11井次现场应用,累计增油7 162 t。转向压裂技术作为低渗油藏一项重点的配套工艺,更进一步改善了油田的整体开发效果。