期刊,中国地质（英文） 2024年卷4期_国家学术搜索

期刊信息/Journal information

中国地质（英文）

出版周期：季刊

国际刊号：2096-5192

电子邮箱：chinageology@126.com

电　　话：010-58584267

邮政编码：100037

地　　址：北京市西城区阜外大街45号

中国地质（英文）/Journal China GeologyCSTPCDCSCD北大核心

查看更多>>本刊旨在围绕地球多圈层交互作用调查研究、能源和其他重要矿产资源调查评价、水文地质与水资源调查评价、山水林田湖草综合调查评价与生态保护修复、海洋地质调查、重要经济区与城市地质调查评价、国际地质合作研究等方面，与世界各国同行交流地质科学研究新问题和地质调查新发现，传播地质新理念，共同探讨信息化、网络化、数字化背景下，地质工作如何保持先行者的形象，持续高效地支撑全球经济发展和环境保护。依托中国地质调查创新发现的优势，设立原创性学术论文、综述性学术论文、最新研究进展、地质界简讯与新闻等四大栏目，重点刊发在解决重大资源环境和基础地质问题过程中前瞻性、引领性、颠覆性学术成果；重点刊发基础性、综合性、专题性综述性成果；重点刊发最新发现和最新地质调查数据等优秀成果。

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Sedimentary environment and organic matter accumulation of Wufeng-Longmaxi shales,southwest Yangtze Plate,China:Insights from geochemical and petrological evidence

An-kun ZhaoDong WangQian ZhangZi-hui Lei...

747-761页

查看更多>>摘要：Upper Ordovician-Lower Silurian Wufeng-Longmaxi Formation is the most developed strata of shale gas in southern China.Due to the complex sedimentary environment adjacent to the Kangdian Uplift,the favorable area for organic-rich shale development is still undetermined.The authors,therefore,focus on the mechanism of accumulation of organic matter and the characterization of the sedimentary environment of the Wufeng-Longmaxi Shales to have a more complete understanding and new discovering of organic matter enrichment and favorable area in the marginal region around Sichuan Basin.Multiple methods were applied in this study,including thin section identification,scanning electron microscopy(SEM)observations and X-ray diffraction(XRD),and elemental analysis on outcrop samples.Five lithofacies have been defined according to the mineralogical and petrological analyses,including mudstone,bioclastic limestone,silty shale,dolomitic shale,and carbonaceous siliceous shale.The paleo-environments have been reconstructed and the organic enrichment mechanism has been identified as a reduced environment and high productivity.The Wufeng period is generally a suboxic environment and the early Longmaxi period is a reducing environment based on geochemical characterization.High dolomite content in the study area is accompanied by high TOC,which may potentially indicate the restricted anoxic environment formed by biological flourishing in shallower water.And for the area close to the Kangdian Uplift,the shale gas generation capability is comparatively favorable.The geochemical parameters implied that new favorable areas for shale gas exploration could be targeted,and more shale gas resources in the mountain-basin transitional zone might be identified in the future.

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Geology and mineralization of the Hongqiling large magmatic nickel-copper-cobalt deposit(22× 104t)in Jilin Province,China:A review

Cong ChenYu-chao GuDi ZhangTao-tao Wu...

762-796页

查看更多>>摘要：The Hongqiling large nickel-copper-cobalt deposit(hereafter referred to as the Hongqiling deposit),a typical mafic-ultramafic copper-nickel deposit in China,boasts proven Ni(Ni)resources of approximately 22× 104 t,associated copper resources of 2× 104 t,and associated cobalt(Co)resources of 0.5× 104 t,with Ni reserves ranking 10th among China's magmatic nickel deposits.Geotectonically,the Hongqiling deposit is situated in the superimposed zone between the Xing'an-Mongolian orogenic belt and the circum-Western Pacific's active continental margin belt.Its ore-bearing plutons occur within the metamorphic rocks of the Ordovician Hulan Group,with the emplacement of plutons and the locations of orebodies governed by the deep-seated Huifahe fault and its secondary NW-trending Fujia-Hejiagou-Beixinglong-Changsheng fault zone.In the deposit,the rock assemblages of ore-bearing plutons predominantly encompass gabbro-pyroxenite-olivine pyroxenite-pyroxene peridotite(pluton No.1)and norite-orthopyroxenite-harzburgite(pluton No.7),with ore-bearing lithofacies consisting primarily of olivine pyroxenite and pyroxenite facies.The Hongqiling deposit hosts stratoid,overhanging lentoid,veined,and pure-sulfide veined orebodies.Its ores principally contain metallic minerals including pyrrhotite,pentlandite,chalcopyrite,violarite,and pyrite.Despite unidentified magma sources of ore-bearing mafic-ultramafic rocks,it is roughly accepted that the magmatic evolution in the Hongqiling deposit primarily involved fractional crystallization and crustal contamination.The ore-forming materials were primarily derived from the upper mantle,mixed with minor crustal materials.The ore-bearing mafic-ultramafic rocks in the deposit,primarily emplaced during the Indosinian(208-239 Ma),were formed in an intense extension setting followed by the collisional orogeny between the North China Plate and the Songnen-Zhangguangcai Range Block during the Middle-Late Triassic.From the perspective of the metallogenic geological setting,surrounding rocks,ore-controlling structures,and rock assemblages,this study identified one favorable condition and seven significant indicators for prospecting for Hongqiling-type nickel deposits and developed a prospecting model of the Hongqiling deposit.These serve as valuable references for exploring similar nickel deposits in the region,as well as the deep parts and margins of the Hongqiling deposit.

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