Geochemical analysis of marine sediments using fused glass disc by X-ray fluorescence spectrometry

A method was developed for content determination of Na, Mg, A1, Si, P,S, C1, K, Ca, Ti, V, Cr, Mn, Fe, Ni, Cu, Zn, Ga, Nb, Zr, Y, Sr, Rb, Ba, La and Ce etc. covering 26 major, minor, and trace elements in marine sediment samples using fused glass disc by X-ray Fluorescence spectrometry. Calibration was made using marine sediment certified reference materials and the synthetic standard samples prepared by mixing several marine sediments with stream sediment and carbonate standard samples in different proportions. The matrix effect was corrected using theoretical alpha coefficients, experience coefficients and the scattered radiation as the internal standard （for the trace elements）. The accuracy of the method was evaluated by analysis of certified reference materials GBW07314, GBW07334 and GSMS6. The results are in good agreement with the certified values of the standards with RSD less than 2.60%, except for Y, Cr, Ga, Ce, La, Nb, Rb, and V with RSD less than 9.0% （n=12）.     

江西危机矿山接替资源找矿收获丰

近日,黑龙江省煤田地质勘查队在鹤岗市萝北县江滨农场境内发现一处优质大煤田,总面积为124．88km2,储量约1．26亿t,煤层平均厚度1m。据了解,该煤田由萝北县江滨农场延伸至毗邻的绥滨县,属于黑龙江和松花江两江交汇的冲积平原三角区。此煤田位于江滨农场境内第1,2和24三个作业站之间,深度400余米。煤种以气煤和1／2焦煤为主,是可采煤层,该地区的煤层煤质较好,储量可观。据勘查队负责人介绍,该地质勘查项目投资3700万元,目前已进入详查阶段,勘查结束后将尽快建矿投产。     

分析质量监控问题的探讨Ⅶ．统一的、系列的允许差制订的设想

本文对化学分析质量监控中的允许差提出了统一的、系列的推荐值计算公式，并按不同的质量要求划分为五类的设想．并以实例作了说明．     

沁水煤田东缘15煤层厚度,煤质特征与沉积环境的关系

15煤层形成于障壁后泻湖充填的滨海平原上。受北低南高的古地形影响,煤层北厚南薄;与泥炭沼泽同期发育的河流使北部煤层变薄、分叉、缺失,灰分增高;煤层形成后被海相沉积覆盖,故煤层具高硫特征。     

孙疃煤矿下石盒子组7~2煤层煤质发育特征及其地质控因

淮北煤田孙疃煤矿下石盒子组72煤层的煤质发育特征及其地质控制因素的研究较为薄弱,不利于后期煤矿进行勘探开发部署工作。通过对孙疃煤矿钻孔资料进行分析,结合前人研究成果,系统研究了淮北煤田孙疃煤矿72煤层的宏观煤岩特征、显微组分特征、无机矿物含量、元素特征,以及煤的灰分、挥发分、发热量等工业分析指标,并从沉积环境、大地构造背景和岩浆活动等地质因素分析其对煤质的控制作用。研究发现,该区72煤层主要为河控三角洲沉积环境,其水体较浅,为弱还原环境,处于海退时期,是煤质发育的主要地质控因,煤层的埋深主要控制煤的变质程度,构造活动和岩浆侵入影响程度较弱,只对部分区域煤质有影响。