加强生态环境保护 促进湛江珍珠养殖业持续发展

为促进湛江珍珠养殖业的持续发展,各级政府和海域管理部门应认真贯彻执行国家有关海域管理的法律法规,加强海域环境保护的宣传教育工作,提高养殖者的环境保护意识。珍珠养殖者要创新养殖方式,拓展新的养殖空间,尊重自然规律,自觉保护海洋生态环境,以解决湛江珍珠养殖业存在的养殖海域无证使用、无度开发、生态功能丧失等问题。     

Revisiting the Relationship Between Urbanization and Economic Development in China Since the Reform and Opening-up

The relationship between urbanization and economic development has become a hot topic in the scientific community due to its great practical significance,and economic and social value.However,this relationship continues to change dynamically.In the new stage of urbanization,it is urgent to reveal the causal relationship quantitatively and diagnose the future direction systematically.Based on this,this paper calculates the contribution rate of China’s urbanization to economic development from 1978 to 2019 and uses the panel data cointegration test method to explore the causal relationship between urbanization and economic development in China.The study has three principal results.First,the contribution rate of urbanization to economic growth has maintained the overall growth trend from1978 to 2019,but the growth rate of urbanization’s contribution to economic growth has been relatively low since 2012.It is an important reason that the real estate sector has moved into a new stage of transformation.Second,the cointegration test shows that economic development is a significant factor in advancing urbanization and the urbanization is the product of economic development.Urbanization has a positive feedback effect on economic development,but this effect does not pass the 5%significance level test.The impulse response function shows that the impact of urbanization on economic development is relatively small and stable,indicating that it is limited that the boost of economic development by land-centered urbanization.Third,China’s urbanization and economic development have both shown rapid growth for some time,but their relationship is still the low level of coordination,which has also led to a downward trend in the contribution of new-type,people-oriented urbanization to economic growth in recent years.In the future,China’s urbanization and economy need to maintain relatively medium-low speed growth in the medium-long term,and we should boost the coordinated development of urbanization and economy from low level to high level.     

塔里木盆地顺北地区11号走滑断裂带变形及其活动特征

塔里木盆地顺北地区发育大量走滑断裂带,并对油气的运聚成藏有重要控制作用.以顺北西部地区地震资料为基础,对顺北11号走滑断裂带的几何变形特征、活动性、活动期次及其形成机制等进行了分析.顺北11号走滑断裂带整体呈NNW走向延伸,具有垂向分层性和平面分段性.断裂带北段主体为压扭和张扭交互段,中段为两条次级断层控制的拉分地堑,...     

新疆阿尔泰可可托海伟晶岩型稀有金属矿床中磷灰石地球化学特征及意义

磷灰石可以记录和保存岩浆和热液活动的信息。可可托海伟晶岩型稀有金属矿床磷灰石发育,为研究该矿床伟晶岩成岩成矿过程提供了优良的条件。已有对可可托海伟晶岩型稀有金属矿床磷灰石的研究集中在其稀土元素特征,较少讨论其对伟晶岩成岩成矿过程的制约。本文选取可可托海伟晶岩型稀有金属矿床富矿伟晶岩脉（3号脉）和相对贫矿伟晶岩脉（1号、2b号和3a号脉）中的磷灰石作为研究对象,进行磷灰石岩相学和地球化学研究。岩相学分析表明,磷灰石主要与钠长石、石英、白云母、锰铝榴石等伴生。EPMA分析显示,磷灰石F含量为3.67%~4.41%,Cl含量小于0.67%,较低的Cl含量表明伟晶岩熔体出溶的流体Cl含量较低;大部分磷灰石MnO含量为4.67%~8.71%,但2b号脉磷灰石MnO含量变化较大（1.23%~14.28%）,这是由于2b号脉磷灰石具有分带结构,暗示其遭受后期热液作用,促使磷灰石溶解-再沉淀,导致MnO含量发生较大变化。LA-ICP-MS分析显示,贫矿伟晶岩脉磷灰石的稀土元素含量较低（< 180×10^-6）;相反,富矿伟晶岩脉磷灰石的稀土元素含量较高（>700×10^-6）,并具有明显的四分组效应（TE_1-3平均值为1.7）。1号脉和3a号脉磷灰石均显示轻稀土元素富集,反映其形成过程中有含Cl热液的参与。3号脉磷灰石显示强烈Eu负异常和Ce正异常,而2b号脉磷灰石显示强烈Ce负异常和中等Eu负异常,这种Eu、Ce异常的差异可能与岩浆-热液阶段大量流体出溶密切相关。磷灰石的沉淀将导致热液中HF含量的降低,促使磷灰石周围铌钽矿结晶和Nb、Ta进入磷灰石中。可见,在伟晶岩形成过程中,磷灰石并非保持稳定,其分带结构和主微量成分变化记录了后期热液活动,暗示后期热液活动对伟晶岩的成矿具有重要作用。

     

利用废弃地下空间建设战略原油储备库的构想

当前各国原油储库主要分为地面储库、地下盐穴储库和地下水封洞窟3种类型.根据我国实际情况分析,这3种类型储库均难以在我国推广.通过分析中国东北地区现有废弃矿山情况,结合地下原油储库的工程技术条件,提出了利用废弃矿山改造地下空间,用以建设战略原油储库的构想.建议尽快开展东北地区废弃矿山地下空间综合调查工作,启动相关地下油气储库封闭实验等测试研究工作.     

黄淮海平原晚新生代重大地质事件

晚新生代以来,青藏高原的隆升导致中国地貌格局、古气候系统及晚新生代沉积体系发生巨变。青藏高原以东至边缘海的广大区域形成统一水系,将巨量沉积物搬运至中国东部连续堆积形成黄淮海平原。太行山的隆升、边缘海陆架的沉降,黄河的贯通及晚第四纪大规模海侵等,深刻改造了黄淮海平原的自然环境,至今仍然影响其社会经济的发展,成为重要的科学问题。针对这些事件的研究,对于理解晚新生代黄淮海平原的形成和演化具有重要意义,也可为缓解该地区目前紧张的人地关系提供理论基础。对晚新生代黄淮海平原形成发育的构造地貌过程、黄河贯通和晚第四纪海侵等重大事件研究现状进行了综合分析,认为：①青藏高原隆升是黄淮海平原当今地貌及海陆格局形成的根本原因;②黄河贯通对黄淮海平原地表过程、水系演化及源-汇体系带来深远影响;③沿海地区晚更新世以来3次重要的海侵事件及相关的海陆相互作用,不但造成了沉积环境的变化,还形成了下切河谷特殊地貌景观;④晚新生代黄淮海地区重大地质事件的时间节点是中新世和晚第四纪。系统总结了黄淮海平原在构造-气候相互作用、地貌动态演化和年代学研究中存在的问题,认为未来亟需对黄淮海平原开展多学科系统性的工作。     

Genesis of the Sinian Solid Bitumen and its Significance for Hydrocarbon Accumulation in the Anyue Gas Field of the Sichuan Basin

正Objective Bitumen is generally associated with oil and gas,which was originally used as an indicator of hydrocarbon reservoirs.With the progress of organic geochemical measuring and testing techniques,bitumen,especially solid bitumen sampled from reservoirs,has been proved to be closely related to the evolution of hydrocarbon     

天津市滨海新区芦苇湿地恢复适宜性评价

利用综合评价模型,结合地理信息系统技术的空间分析功能,以土地利用、土壤类型、坡度、降雨量和人类干扰活动作为评价因子,对天津滨海新区芦苇湿地恢复进行了适宜性评价。结果表明,较适宜开展湿地恢复的比例为21.46%,一般适宜比例为21.87%,不适宜比例占56.68%,其中较适宜湿地恢复的区域集中分布在北大港湿地自然保护区周边、独流减河下游、北塘入海口以及沿海滩涂,海河流域两侧也有零星分布。在适宜性评价基础上,对未来芦苇湿地恢复与建设的重点区域进行了成效预评估,芦苇对TC、TN、TP的年吸收通量约为1.3935×104、0.0258×104、0.0017×104t,能有效地减少入海排污压力和污染物对近岸海域环境质量的影响。研究结论可为天津湿地治理与生态恢复、土地利用结构调整、景观优化等提供理论依据和科学参考。