国内外煤炭资源量报告对比研究——以南澳WINTINNA矿区为例

以南澳州WINTINNA煤炭勘查区为实例,选取以我国《固体矿产资源储量分类GB／T17766—1999）标准为勘查标准的《南澳WINTINNA勘查区详查地质报告》和以《澳大利亚矿产资源和矿石储量公布规范（JORC规范）2004）为标准的《WINTINNA煤炭资源量评述报告》作为对照,从报告结构、矿产资源量估算、煤炭资源量结果、资源量变化原因四个方面进行了详尽的对比研究,通过算理与算法对资源量变化原因进行剖析,深入阐述了以JORC标准为主导的国际资源储量估算领域的指导思想和国际通行估算方法,指出了国内外在煤炭资源储量估算领域的不同,对提高我国的资源储量报告在国外市场上的效力、实现国内外主要资源储量标准分类下该类型资源储量报告的快速准确映射和转换具有实际意义。     

Experimental study on supercritical phenomena of WO<Subscript>3</Subscript> solubility in NaCl-H<Subscript>2</Subscript>O system

The solubility measurements of WO₃ in NaCl-H₂O system with 4.0% by weight salt were carried out to study the supercritical phenomena of solubility. These experiments were carried out using rapid-quench pressure vessels, with quantitative Na₂WO₄-2H₂O, HCl, NaCl and H₂O in Pt capsule to determine the solubility of WO₃ from supersaturated solution. The pressure was kept at 34 MPa, which was near the critical pressure 31.4 MPa and the temperatures varied from 250°C to 550°C. The experimental results indicate that the solubility of WO₃ has the features of supercritical phenomenon in critical region and is sensitive to the change of system temperature and solvent density. The temperature and pressure in this experiment are close to those of ore-forming fluids in many tungsten deposits, so the features of supercritical geofluids can be helpful to investigating the ore-forming mechanism of tungsten deposit.     

Chemical Composition of Urban Street Sediments and Its Sources

INTRODUCTIONBeijingfacesseveredustpollutionduetosuchsourcesasdustimportedfromwesterndeserts,industryandpowerplants,domesticcombustionprocessesandtraffic .Inthelastdecades ,theurbanpopulationhasgrowntomorethan10million .TheeconomicgrowthofChinahasalsoleftitsfootprintsinBeijing .Newindustrialzonesanddomesticar easweredeveloped ,inducinganincreasingtrafficcirculation(Shi,2 0 0 1) .Thedroughtclimateinalmostthewholeyear ,thestrongmonsoonsinwinterbringingdustsfromtheGobidesert,theheavytraffic…     

因子分析中变量和样品空间的统一

以空间结构分析为基础，提出了一个统一的变量和样品空间，由此得到因子空间，依据因子空间中变量和样品的相关性，很容易确定样品点群的成因，还讨论了因子分析中变量坐标和样品坐标的概念，指出因子得分不是样品的坐标，因而把因子得分图看作为因子空间坐标图是不合适的。     

矿物在超临界溶液中的溶解度理论计算

本文概述了矿物在超临界溶液中的溶解度理论计算。讨论了平衡常数法和自由能法的热力学原理和计算机方法。两种方法都需要热力学数据,所不同的是平衡常数法需要的是反应平衡常数,而自由能法需要物种自由能数据。方法确定以后这些数据具备与否及其精度是这项研究的关键。此外当溶液中离子强度较大时,寻求一种适当的活度系数算法对溶解度理论计算也至关重要。     

东海宝云亭三井热解录井方法应用研究的探讨

有机地化(热解)录井是一种新的录井方法,在东海的油气勘探工作中已得到较好的应用效果。在试油前能将录井资料进行综合整理与解释,随钻预测钻井中的含油气层段,为油气层位的确定提供依据。     

GPS桥梁高程控制测量

本文提出利用江河海边岸上相邻水准点间的高程异常差进行ＧＰＳ高程拟合,避免了两岸末统一高程系统对拟合参数的影响,经虎门大桥实验验证,在海面宽３ｋｍ多的两岸上获得的高程系统差的精度满足特大型公路桥梁的高程控制要求,这对沿海平坦地区的铁路桥梁跨河水准测量都有参考作用。     

Who is the “murderer” of the bloom in coastal waters of Fujian,China, in 2019?

Journal of Oceanology and Limnology - On May 24–29, 2019, a bloom occurring in Pingtan coastal areas of Fujian Province caused mass mortality of cage-cultured fish (Plectorhinchus cinctus and...