CAJ | 학술논문

采用光学显微镜、X 射线衍射和电感耦合等离子质谱等方法对采自平朔矿区4＃煤中的样品进行分析,并对镓的分布、赋存和富集因素进行了讨论。结果表明4＃煤中镓的平均含量达35.70 mg/kg,推算出平朔矿区4＃煤中的镓储量约为6.32万 t。4＃煤中整体镓含量较高,但分布不均匀,并呈现出顶底板及夹矸中含量较高的接触富集现象；在显微镜下发现煤中有很多粘土矿物与勃姆石,表明镓的富集主要与粘土矿物(如高岭石)和勃姆石有关；镓的富集受陆源区母岩性质、沉积环境和后生淋滤作用等地质因素的多方面影响,本研究区镓的富集则主要受控于陆源区母岩性质。
채용광학현미경、X 사선연사화전감우합등리자질보등방법대채자평삭광구4＃매중적양품진행분석,병대가적분포、부존화부집인소진행료토론。결과표명4＃매중가적평균함량체35.70 mg/kg,추산출평삭광구4＃매중적가저량약위6.32만 t。4＃매중정체가함량교고,단분포불균균,병정현출정저판급협안중함량교고적접촉부집현상；재현미경하발현매중유흔다점토광물여발모석,표명가적부집주요여점토광물(여고령석)화발모석유관；가적부집수륙원구모암성질、침적배경화후생림려작용등지질인소적다방면영향,본연구구가적부집칙주요수공우륙원구모암성질。
In this paper,the optical microscopy,X-ray diffraction,ICP-MS and other meth-ods are used to analyze the sample taken from 4 # coal seam in Pingshuo Mining area,and the dis-tribution,occurrence and enrichment mechanism of Ga in it are also discussed.The results indi-cate that the average content of Ga in 4 # seam reaches 35.70 mg/kg,from which it is deduced that the Ga reserves in 4 # seam is approximately 63.2kt.But it distributes unevenly and shows a regular pattern that the Ga content is higher near the roof and floor and in the dirt band.Lots of clay minerals and boehmite are found in coal with the microscopy,which shows that the concen-tration of Ga is primarily related to clay minerals (such as kaolinite)and boehmite.The enrich-ment of the Ga is influenced by many geological factors,such as the properties of the terrigenous parent rock,depositional environment and epigenetic leaching effect,etc,and the enrichment of Ga in this study area is mainly controlled by the properties of terrigenous parent rock.