东秦岭石界河群中石榴石成分环带所记录的PTt轨迹

位于河南省西峡县北部地区的石界河群榴云片岩中的石榴石发育有很好的结构和成分环带。本文应用微分热力学方法对其环带成分进行计算,确定出一条顺时针方向的PTt轨迹。该轨迹与应用矿物共生组合世代关系确定的PTt轨迹十分吻合。     

SEA LEVEL RISE OF THE ZHUJIANG RIVER DELTA AND NEOTECTONICS

A linear regression analysis of 28 selected tide-gauge stations of the Zhujiang Estuary shows that there has been a tendency of local sea level rise at a rate of 2.028 mm per year. The origin of the variation is significantly attributed to the local tectonic movement of discrepant fault-block. Based on this, four types of relative local sea level changes are classified. According to calculation, half of the fertile land, or 800 km2 of the delta plain will have been submerged by sea water by about 2040. This will yield a significant influence on the economic construction and human activities.     

长春双阳地震台数字水管仪倾斜潮汐观测质量评定

对双阳地震台DSQ型水管倾斜仪2001～2006年倾斜潮汐观测资料作了质量评定,检定结果显示:观测资料连续,仪器观测状况稳定,年零漂、年变幅小,噪声水平低.     

f-3项与投影函数对电离层延迟的影响

依据Chapman正常电离层理论,构造Chapman剖面函数加权投影函数,给出VTEC三角多项式模型,并以武汉站2005年1月1日观测数据进行实例解算,分析电离层延迟f-3项、电离层单层高度、电离层投影函数形式等对电离层延迟的影响.     

地震电磁卫星星座轨道优化设计

根据地震监测任务对电磁卫星的需求．利用点数字仿真方法和遗传算法优化设计了电磁卫星星座。由4颗卫星组成的电磁卫星星座之空间分辨率约为700km．覆盖全球的观测用时周期为12小时。     

Significance test for empirical orthogonal function (EOF) analysis of meteorological and oceanic data

ＩＮＴＲＯＤＵＣＴＩＯＮＥｍｐｉｒｉｃａｌｏｒｔｈｏｇｏｎａｌｆｕｎｃｔｉｏｎ (ＥＯＦ)ｉｓａｓｔａｔｉｓｔｉｃａｌｍｅｔｈｏｄｗｉｄｅｌｙｕｓｅｄｔｏｑｕａｎｔｉｔａｔｉｖｅｌｙｅｘａｍ ｉｎｅｍｅｔｅｏｒｏｌｏｇｉｃａｌａｎｄｏｃｅａｎｉｃｄａｔａ (ＰｒｅｉｓｅｎｄｏｒｆｅｒａｎｄＢａｒｎｅｔｔ,1 977;Ｒａｓｍｕｓｓｏｎｅｔａｌ.,1 981 ;ＫｎａｐｐｅｎｂｅｒｇｅｒａｎｄＭｉｃｈａｅｌｓ,1 993 ;ＬｅｅａｎｄＣｏｒｎｉｌｌｏｎ ,1 995) .Ｔｈｅｍｅｔｈｏｄｓｅｅｋｓｏｕｔｔｈｅｆｉｒｓｔｆｅｗｏｒｔｈ…     

自然构造分离面与饰面板石材的自然块度

本文运用构造地质学中有关节理裂隙、层理和断层等构造面的概念,论述了饰面板石材矿床的地质研究与评价方法,并指出岩石的自然块度、自然块度分级及其计算方法是该项研究的重要内容。此外,该文还论述了矿床开采阶段中各种自然构造分离面的合理应用。     

Geochemical studies of U,Th, Ra,40K in seciments of the China Sea and adjacent sea area,and lower reaches of several Chinese Rivers

Geochemical studies of the U, Th, Ra, and⁴⁰K in surface sediments of the China Sea and adjacent sea areas, the lower reaches of the Huanghe and Changjiang Rivers and the estuaries of the Zhujiang and Rongjiang Rivers were carried out with a model 8180-4K multichannel Ge(Li)γ spectrometer in 1981–1985. The mean values of U, Ra, Th,⁴⁰K are about 2.11 ppm, 7.67×10⁻¹³g/g, 11.00 ppm, and 2.33 ppm respectively, in the China Sea, the Okinawa Trough, and the Changjiang and Huanghe River estuaries. The distribution of the four isotopes is uniform in the above zone. The contents of U and Th in the sediments of the Zhujiang and Rongjiang Rivers and the Fujian coast are 1–4 times higher than those of the above zone and are related to the granite and radioactive ore present in the upper reaches of these rivers or the adjacent mountains. The distributions of U, Th, Ra, and⁴⁰K are related to the physico-chemical property, redox state, geological type and grain size of the sediment, and biotic activity. Contribution No. 1408, Institute of Oceanology, Academia Sinica, Qingdao.     

LSQRD及解的分辨分析

较详细地介绍了ＬＳＱＲＤ（Ｌｅａｓｔ Ｓｑｕａｒｅ ＱＲ Ｄｅｃｏｍｐｏｓｉｔｉｏｎ） 反演方法以及“检测版”分辨分析方法,并举实例检验其应用。对于大型稀疏方程组的求解,ＬＳＱＲＤ 是一种内存需求小、计算效率高和抗噪能力较强的算法。“检测版”试验表明,ＬＳＱＲＤ也可以对迭代解进行有效的可靠性估计,以指导对反演结果的利用。     

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。