大红山铁铜矿Ⅲ_2a、Ⅱ_5-4矿体对比及探矿建议     

李建飞 《云南地质》2011,30(4):439-442

对部分矿体基建探矿前后矿体主要特征及资源储量对比,探讨矿体控制程度和控制网度问题。原勘探工作对矿体的控制程度很高,矿山生产探矿可适当放稀间距,减少工程量,降低生产成本。  相似文献   

云南马龙马鞍山铁矿成矿地质条件     

陈伟 《云南地质》2011,30(3):326-328

铁矿床由基底岩石中黄铁矿、菱铁矿在近地表经风化淋滤后,搬运沉积形成。属风化残积型褐铁矿。  相似文献   

青海格尔木四角羊沟铅锌矿成因分析     

王进朝  冯志兴  李赛  沈忠义  于斌 《云南地质》2011,30(2):154-156

矿床受上石炭统四角羊沟组(C3s)碳酸盐岩与印支期花岗闪长岩体(γδ1b5)的接触带控制,矽卡岩化带中的褐铁矿化(“铁帽”)是最直接的找矿标志.  相似文献   

云南景谷岔河铜矿控矿因素     

孙福伟  付义琴 《云南地质》2011,30(3):312-315

芒亨河断裂的次级断裂是主要控矿构造,含矿围岩为上三叠统小定西组(T3xd)富钠质安山岩、玄武岩。受构造、层位、碎屑粒度的制约。  相似文献   

云南西双版纳曼远铁矿矿床地质     

孙云堂 《云南地质》2011,30(3):321-322,311

曼远铁矿以磁铁矿、赤铁矿、磁赤铁矿为主,赋存于澜沧群勐井山组上段中部。该组地层中夹多层中性—基性火山岩、火山凝灰岩,属典型的火山沉积变质型铁矿。  相似文献   

Kinetic simulation of hydrocarbon generation from lacustrine type I kerogen from the Songliao Basin: Model comparison and geological application     

Wang Min  Lu Shuang-fangXue Hai-tao 《Marine and Petroleum Geology》2011,28(9):1714-1726

Eight lacustrine Type I kerogen samples from the Songliao Basin were pyrolyzed using the Rock-Eval equipment, and parallel first-order reaction models including the model with a single frequency factor and a discrete distribution of activation energies (SFF model) and the model with multiple frequency factors and a discrete distribution of activation energies (MFF model) were adopted to analyze kinetic characteristics of hydrocarbon generation of the Type I kerogen samples. The results show that the MFF and SFF models can satisfactory simulate hydrocarbon generation under laboratory conditions and the Type I kerogen shows relatively concentrated activation energy distributions (activation energies of MFF model range from 190 kJ/mol to 250 kJ/mol, activation energies of SFF model range from 220 kJ/mol to 240 kJ/mol), which indicates a homogeneous chemical bond structure of the Type I kerogen. The hydrocarbon generated curves from Type I kerogen were calculated by using the two models with a linear heating rate (3.3 K/Ma). It indicates that the hydrocarbon generation potentials (reaction fractions) are underestimated by using the SFF model during the kerogen thermal degradation for the components with chemical bond of lower and higher activation energies, while this problem can be avoided by using the MFF model. The calculated temperatures for 50% transformation ratio (TR) of all samples differ by as much as 20 °C. For the SFF model, the hydrocarbon generation curve obtained by using the weighted averaged kinetic parameters and the SFF model almost includes every curve calculated by using its own kinetic parameters. While the curve obtained by using the weighted averaged kinetic parameters and the MFF model cannot include every curve for all samples, it lies at the position of the averaged curve of all samples. The application of the MFF model in Songliao Basin shows that if TR 10% is taken as the onset of hydrocarbon generation, the threshold depth of hydrocarbon generation is about 1700 m, which is consistent with other geochemical parameters, such as S₁/TOC, S₁/(S₁ + S₂) and HC/TOC.  相似文献   

一元非对称P范分布的极大似然平差     

潘雄  赵启龙  王俊雷  袁珊丽 《测绘学报》2011,40(1):33-36

从测量误差的实际情况出发,提出一元非对称P范分布极大似然平差方法,建立该方法的数学模型,得到一元非对称P范分布的密度函数,利用极大似然估计方法推导参数估计值的基础方程.研究表明,结合实际测量数据,通过选择合适的参数估计值,可以增加误差分布模型选取的灵活性,便于P范分布理论在测绘数据处理中的推广应用.  相似文献   

基于Kalman滤波的动力学模型误差估计算法   总被引：1，自引：1，他引：0  

高为广  张晓东 《测绘科学》2011,36(2):56-58

本文分析介绍了模型误差对滤波解和预报残差影响的表达式.随后,针对GPS/INS松组合导航系统观测信息无冗余的情况,给出了基于Kalman滤波的动力学模型误差估计算法.最后利用一个车载实测数据证明了算法的有效性.  相似文献   

基于验后方差估计原理导出的选权迭代法剔除粗差     

孙同贺 《测绘与空间地理信息》2011,34(1):215-217

将抗差估计的思想融入到粗差探测的算法中,设计出对模型误差,特别是粗差具有抵抗能力的粗差探测算法.基于验后方差估计原理导出的选权迭代法即为抗差佑计的一种,首先是应用最小二乘法来计算观测值的参数x、残差V、协因数阵Qvv及单位权σ0 的初值,然后再根据残差和有关的参数,按所选择的权函数,计算每个观测值的权,经过迭代计算求得...  相似文献   

具有稳健初值的选权迭代法曲面拟合模型粗差探测     

王奉伟  周世健  周清  陆培鹤 《测绘与空间地理信息》2015,(6):39-41

将抗差估计的思想融入到二次曲面模型粗差探测的算法中,设计出对模型误差特别是粗差具有抵抗能力的粗差探测算法。稳健初值的选权迭代法即为抗差估计的一种,首先是通过线性规划的单纯形解法来计算观测值的残差,然后再根据残差和有关的参数,按所选择的权函数,计算每个观测值的权,经过迭代计算求得观测值的残差。通过实例证明,具有稳健初值的选权迭代法具有较强的稳健性和粗差探测能力。  相似文献