西昌昔格达组物质组成及源区分析

西昌昔格达组主要由杂色水平纹层状粘土(岩)及粉细砂(岩)构成,偶夹砂卵石层,以水平层理为主,粉细砂层中偶见交错层理。粘土(岩)的成岩程度高于粉细砂(岩),但后者中含有完全成岩的粉细砂岩条带。粘土(岩)由27％~35％的绿泥石、18％~26％的绢云母、27％~35％的石英和13％~20％的斜长石组成,其Al2O3/SiO2仅为0.15,远低于攀枝花及大渡河富林昔格达组粘土(岩)和一般粘土。粉细砂(岩)的碎屑物主要由石英、长石和岩屑组成,平均含量分别为27％,49％和25％。昔格达组所夹卵石层分选很差,最大卵石粒径6cm,含有昔格达组粘土岩和粉细砂碎块及强风化石英闪长岩和泥质粉砂岩碎块。昔格达组自身及所夹卵石层的矿物及化学成分表明,其物源区以物理风化为主,碎屑物质搬运距离近、堆积迅速,区内有玄武岩、石英闪长岩、花岗岩、流纹岩及斑流岩、石灰岩、砂岩、粉砂岩、泥质粉砂岩及片岩、千枚岩、变砂岩等浅变质岩出露。安宁河流域黄连关以北段不仅具备西昌昔格达组物源区的地质环境特征,而且具有补给西昌昔格达湖盆的物源储备,昔格达组自身及所夹卵石层中已经识别出的矿物碎屑、岩屑及卵石在区内都有分布。西昌昔格达组形成于安宁河之后,其沉积环境应为安宁河局部下陷形成的断陷湖盆,沉积物来源具有很强的局地性。     

Landscape ecological construction and biodiversity protection

Ｌａｎｄｓｃａｐｅｅｃｏｌｏｇｙ,ｐｒｏｄｕｃｅｄｂｙａＧｅｒｍａｎｎａｍｅｄＣ．Ｔｒｏｌｌｉｎ１９３９,ｗｅｎｔｔｏｒｅｓｕｒｒｅｃｔｉｏｎｉｎｔｈｅ１９８０ｓａｆｔｅｒｈａｖｉｎｇｗａｖｅｒｅｄｆｏｒｏｖｅｒｆｏｒｔｙｙｅａｒｓ,ａｎｄｎｏｗｉｔｈａｓｂｅｅｎａｎｉｍｐｏｒｔａｎｔ,ｃｏｍｐｌｉｃａｔｅｄａｎｄｃｏｍｐｒｅｈｅｎｓｉｖｅｃｒｏｓｓｄｉｓｃｉｐｌｉｎｅ．Ｉｎｔｈｅ２１ｓｔｃｅｎｔｕｒｙ,ｔｈｅｓｏｃｉａｌｓｕｓｔａｉｎａｂｌｅｄｅｖｅｌｏｐｍｅｎｔｗｉｌｌｂｅｔｈｅｍａｊｏ…     

广西海洋旅游地学资源特色及开发建议

广西旅游地学资源丰富,在区位、成景条件,景观种类数量、质量、旅游业的形势、开发程度、客源市场、旅游产品、研究水平等特色明显;如何变资源为效益,必须从发展方向与总体目标,重点区建设模式、开放力度、设施配套及环境保护等方面认真研究,合理开发。     

A novel model to assess soil productivity in the dry-hot valleys of China

Accurate evaluation of soil productivity has been a long-standing challenge. Although numerous models for productivity assessment exist, most are cumbersome to use and require substantial parameter inputs. We developed a new empirical soil productivity model based on field investigations of soil erosion, soil physicochemical properties, and crop yields in the dry-hot valleys (DHVs) in China. We found that soil pH, and organic matter and available potassium contents significantly affected crop yields under eroded conditions of the DHVs. Moreover, available potassium content was the key factor affecting soil productivity. We then modified an existing soil productivity model by adding the following parameters: contents of effective water, potassium, organic matter, and clay, soil pH, and root weighting factor. The modified soil productivity model explained 63.5% of the crop yield. We concluded that the new model was simple, realistic, and exhibited strong predictability. In addition to providing an accurate assessment of soil productivity, our model could potentially be applied as a soil module in comprehensive crop models.     

对我国数字城镇建设的几点思考

我国城镇化快速发展迫切需要在全国大中小城市和小城镇加快实施信息化战略,建设具有中国特色的“数字城镇”。本文从“数字城镇”技术构成出发,分析了我国“数字城镇”发展现状及其面临的主要科技问题,提出要加强对“数字城镇”数据平台、综合信息服务平台、业务应用平台构建等关键技术问题的研究,以从整体上提升我国城镇信息化的水平。     

在庆祝山东省地质科学实验研究院建院50周年大会上的讲话

今天,我们在这里隆重集会,庆祝省地科院建院50周年.首先,我代表山东省国土资源厅,向全院广大干部职工和离退休老同志,表示崇高的敬意!向长期以来关心支持我省地质工作的各级领导和社会各界人士,表示衷心的感谢!     

河南小秦岭金矿控矿条件分析及找矿前景

本文从矿源层控矿构造、区域变质、混合岩化、岩浆作用及多期次的热液成矿叠加作用等方面对金矿的控矿条件进行了较深入的分析，进一步提出了淘金沟─贵家峪一带为找金远景区；在文峪的深部可能有糜棱岩型或黄铁矿型金富集段的存在。     

浙西北前震旦纪火山岩的Nd、Sr同位素地球化学

在浙西北双溪坞群和上墅组火山岩系获得较可靠的Sm－Nd同位素年龄的基础上，本文进一步做了Nd、Sr同位素地球化学研究。∈Nd（T）和∈Sr（T）示踪判别了该区前震旦纪火山岩浆源区特征及其物质来源。同时，Nd同位素模式年龄为该区存在更古老基底提供了重要的地质年代信息。     

A digital correlative accumulation and its application to underwater acoustic telemetry,telecontrol and remote sensing

A specific digital time correlative accumulation has been developed. It is an adaptable scheme of signal processing for underwater acoustic technology used in telemetry., telecontrol and some remote sensing. Its basic principle is here introduced and the prospects for successful use in an acoustic channel with multipath, time-space variables and high noise level are amply discussed. The performances of this scheme are analysed. The digital time auto-correlative accumulation has been used in two types of acoustic releases, and the cross-correlative accumulation has been used in a shallow water targets telementer. There are some advantageous performances with these devices, for example, the effective range of release can reach about 4 nautical miles in a much complex shallow water area such as that in Xiamen Harbor where the depth ranges from 3 to 30 m, and the targets telemeter can normally keep working in even shallower water area.     

COSTAS环解调器设计及实践初探

本文详细介绍自行设计的COSTAS环解调器的工作原理,环路参数选择以及实际工作效果。