都龙锡锌多金属矿床稀土元素地球化学特征及指示意义

都龙锡锌多金属矿床属于滇东南有色金属矿产带的重要组成部分,主要矿石类型为锡石硫化物—矽卡岩型,化学成分和矿物组合比较复杂,具有多期成矿的特点。为了进一步了解矿区成岩成矿过程,本文对该区花岗岩、大理岩、矽卡岩、矿石和片岩的稀土元素特征进行了系统研究,结果表明：区内花岗岩属于地壳硅铝层部分熔融进而通过结晶分异作用形成的复式花岗岩,成矿物质来源于地壳深部岩浆;各元素特征和稀土元素变异图表明矿石和矽卡岩、花岗岩具有同源性;矿石具Eu正异常,其反映成矿过程中有高温流体的参与,形成于氧化环境。     

C3D测深侧扫声纳探测系统综述

对C3D测深侧扫声纳系统的构成、工作原理、性能、优点、应用等进行了介绍,对基于C3D构建水下探测系统和工程实践进行了研究,对C3D数据处理工具和方法进行了探讨,对C3D的优势、不足和应用前景进行了总结。实测表明,C3D是一款性能优越能够满足多种水下工程需要的声纳探测系统。     

东营凹陷民丰洼陷北带沙四下亚段深层天然气储层成岩作用

由于对东营凹陷民丰洼陷北带深层天然气储层成岩作用特征及其对储层的控制作用认识不清,给该地区天然气勘探带来了极大的风险。综合运用铸体薄片、扫描电镜观察、流体包裹体分析及岩心物性分析等多种技术方法,对东营凹陷民丰洼陷北带沙四下亚段深层天然气储层成岩作用特征及其对储层物性的影响进行了系统的研究。结果表明,该区北带沙四下亚段深层天然气储层为近岸水下扇砂砾岩,成岩作用具有强压实、欠压实、多期溶解、多期胶结、复杂交代和灰泥组分重结晶的特征。主要胶结-溶解作用序列为长石溶解/石英次生加大→碳酸盐胶结/石英溶解→碳酸盐胶结物溶解/石英次生加大→黄铁矿胶结/沥青充填。近岸水下扇不同亚相（微相）沉积特征的差异性导致了埋藏过程中成岩作用的差异性,并决定了储集物性的差异性。扇根砾岩在埋藏过程中成岩作用以压实作用和灰泥杂基重结晶作用为主,溶解作用微弱,物性持续降低。在中深层灰泥杂基的重结晶作用使扇根砾岩物性快速降低而形成致密层,扇根砾岩全部为干层。由于早期异常高压和早期油气充注对储层保护以及酸性溶解对储层改造的综合作用,扇中辫状水道远离泥岩、砂砾岩储层在中深层仍发育大量原生孔隙和少量的次生孔隙,储层物性较好,可作为良好的天然气储层。扇中辫状水道靠近泥岩层储层、扇中水道间以及扇缘部位因发生强烈胶结作用,在砂体顶底形成致密的胶结壳,可作为较好的盖层。     

桂北龙胜岩湾金矿稀土元素四分组效应及其地质意义

桂北龙胜地区金矿广泛分布,岩湾金矿便是其中一例。岩湾金矿为产于前寒武系浅变质碎屑岩系中的脉状金矿,受NNE向断裂控制、围岩蚀变强度不高、矿物组合比较简单。通过对岩湾金矿床黄铁矿稀土元素地球化学特征研究发现,岩湾金矿的稀土元素具有非常典型的"W"型稀土四分组效应;稀土元素的四分组效应与其氢氧同位素特征反映的成矿流体来源既有大气降水又不能排除岩浆流体的参与相吻合,说明岩湾金矿属于具有两种（期）热液参与成矿的浅成中低温热液脉状矿床。     

枸杞岛海藻场冬季细菌群落结构分析

从枸杞岛海藻场和对照点贻贝场分别采取表层及底层水样,利用细菌通用引物,提取样品总DNA进行聚合酶链式反应(PCR)扩增,采用16SrDNA文库技术,对其细菌群落进行鉴定和分析。结果表明,海藻场表层和底层细菌群落分为5和6个门,贻贝场表层和底层细菌群落分为3和4个门,海藻场中细菌分类门数多于贻贝场内,优势菌均为变形细菌门,分别占克隆文库的比例为40.7%、50%、59.1%和48.1%。γ-变形菌纲为变形细菌门的优势亚群,各个文库中均含有许多未确定其分类的序列,即含有许多未被认知的微生物类群。变形菌门、厚壁菌门和放线菌门为所有水样共有,但在水层垂直分布及不同地理位置间存在较大差异。不同功能类群可能与其特殊生境密切相关。     

人工神经网络油气识别圈闭软件的设计与实现

本文介绍人工神经网络油气识别圈闭软件用户界面的设计风格、系统的构成、各处理单元的数学模型与功能。系统包括五个功能模块，由主控菜单驱动的用户界面程序统一管理和调用，实现了数据预处理、信息优化提取、模式识别和成果图件演示、打印一体化。     

Spectrum Characteristics and Transfer Function of the Hydrograph of the Deep Aqueous System

The fluctuation of most of the hydrograph in the deep aqueous system records the fluid pulsation in lithosphere and variation of the earth's crust. Many observations have verified that groundwater is an ideal information carrier of the crust. In this paper, the series of input (precipitation, air pressure, Earth tide etc.) and output (water level, artesian flow) of the deep aqueous system are studied by using the spectrum analysis and system theory. The application concepts of transfer function and the spectral structure of the hydrograph enrich the knowledge of the deep aqueous system. Two typical spectral structures of the hydrograph of the deep aqueous system are obtained by comparing with many water-bearing systems of the Jizhong depression. One is from well Ma-17 and the other is from the well Xinze-5. Finally, the physical models of forming the spectrum of the hydrograph are constructed on the basis of the spectrum research on the deep aqueous system.     

水资源多目标多阶段模糊优选理论与技术

本文提出多目标递推矩阵新概念,建立水资源系统多目标模糊优选动态规划理论,模型与技术。提出用模糊集方法建立目标权重。最后给出一个算例。     

甘肃白银铜厂沟地球化学异常特征及找矿预测

为实现甘肃白银矿田找矿新突破,在矿田东侧铜厂沟地区开展了找矿预测工作。区内已发现铜厂沟和小铁山等矿床,在收集总结前人成果资料的基础上,通过对研究区地质概况、地球化学异常特征、控矿因素的研究,获得区域找矿标志,在区内发现多处异常,且多数异常的产出位置在已知矿床附近,表明构造原生晕地球化学找矿在铜厂沟地区具有较好的效果。以地球化学异常特征为主,结合地质找矿标志对研究区进行找矿预测,圈定和评价了小铁山—铜厂沟靶区及铜沟脑靶区,可望实现找矿突破。     

Acoustic Conditioning System Development and Conditioning Experiments on Black Seabreams in the Xiangshan Bay Sea Ranch

Attracting released hatchery-reared fish to designated areas during the growth process is vital to realize the objectives of sea ranching. Based on the bottom artificial reefs and surface kelp culture facilities in the Xiangshan Bay sea ranch, we proposed systematic techniques related to acoustic conditioning of the black seabream(Sparus macrocephalus). Experiments conducted in 12 m × 10 m × 1.6 m ponds on Xixuan Island showed that black seabream was positively sensitive to 500–600 Hz periodic signals. Conditioned responses were apparent after 8 d. Two to three days were required for recovery of the memory of a conditioned response after a 20-day interval. According to the practical application requirements in the open sea, unattended acoustic conditioning equipment was developed. The ranching equipment was used in 12 m × 12 m × 2.5 m cages, and the behavior of black seabream juveniles was successfully guided after 7 days. Of the 16000 released fish, 82.5% of them were conditioned with a flexible grading net. To avoid inducing a stress response, the juveniles were released into the sea ranch in situ from the net cage. The acoustic conditioning equipments were moved into the open sea and the aggregation phenomenon of the released fish was observed when the sound was played. After 6 months of investigation and based on Sr+ marking, only one acoustically conditioned fish was found outside the 3.5-km~2 sea ranch area, thereby reached the goal of guiding activity. The practical effect in the Xiangshan Bay sea ranch showed the validity of the acoustic conditioning system, which may contribute to improve the operation of the sea ranches in the East China Sea.