地球学报2025，Vol.46Issue(2)：321-332,12.DOI:10.3975/cagsb.2024.052404
黑龙江省萝北县云山石墨矿床地球化学特征及碳质来源研究
Study on Geochemical Characteristics and Carbon Sources in Yunshan Graphite Deposit,Luobei County,Heilongjiang Province
摘要
Abstract
The Yunshan graphite deposit in Luobei County,Heilongjiang Province,exists as a crystalline schist in the lower part of the Dapandao Formation of the Xingdong Group from the Mesoproterozoic era.As an important mineral area of crystalline graphite in Heilongjiang Province and China,the reserves of crystalline graphite rank first in the country and are classified as a super-large sedimentary metamorphic graphite deposit.This study uses the Yunshan graphite deposit in Luobei,Heilongjiang Province,as a case study.Through the analysis of major elements,trace elements,and carbon isotopes of the graphite ore and the discrimination of primitive rock restoration diagrams,it was preliminarily determined that the primitive rock of the Yunshan graphite ore deposit is a parapetamorphic rock,which is a normal sedimentary rock.This primitive rock exhibits characteristics of carbonaceous mudstone,sandy mudstone,and carbonaceous shale.The graphite ore samples show apparent negative anomalies of Eu,Sr,and Ti,positive anomalies of U,and slight negative anomalies of Ce.These anomalies suggest that the original sedimentary environment of the graphite ore primary rocks may have been a shallow sea or a semi-deep sea and that the sedimentary rocks may have been derived from marine sediments with high organic matter accumulation.The sedimentary tectonic environment of the Yunshan graphite ore protolith was primarily a passive continental margin.Carbon isotope analysis shows that the δ13C value of graphite ore ranges from-24.7‰ to-21.4‰,while that of marble ranges from 6.28‰ to 7.09‰,indicating that the carbon source of graphite is organic carbon and that of marble is inorganic carbon.关键词
萝北/云山石墨矿床/稀土元素/地球化学特征/δ13C/原岩恢复/碳质来源Key words
Luobei/Yunshan graphite deposit/rare earth elements/geochemical characteristics/δ13C/primitive rock recovery/carbon source引用本文复制引用
赵国龙,张寄丹,王大伟,岳洪举,于庆洋,马新春,付红梅..黑龙江省萝北县云山石墨矿床地球化学特征及碳质来源研究[J].地球学报,2025,46(2):321-332,12.基金项目
本文由黑龙江省财政资金项目"黑龙江省萝北县云山石墨矿深部普查"(编号:KCZX-SMKC-2016001)资助. This study was supported by Heilongjiang Prov-ince(No.KCZX-SMKC-2016001). （编号:KCZX-SMKC-2016001）
