检索结果-南通市图书馆

Journal of Earth Science 1998年第2期17卷 37-44页

作者： zhuang hanping lu jialan fu jiamo liu jinzhong guangzhou institute of geochemistry, Chinese Academy of Sciences, guangzhou 510640

The mineralization is related closely to sedimentation, diagenesis and hydrothermal processes. In this paper, investigations are carried out on coal occurrence, maceral composition, inorganic minerals, trace elements and huminite reflectance. It is concluded that the source of Lincang superlarge deposit is mainly the muscovite granite in the west edge of the basin. During sedimentation, Ge (germanium) was leached out and entered the basin. Ge was adsorbed by lower organism and humic substances in water. Lincang lignite underwent three thermal processes: peatification, early diagenesis and hydrothermal transformation. During peatification, Ge was adsorbed or complexed by humic colloids. During early diagenesis, the Ge associated with humic acids was hard to mobilize or transport. Most of Ge entered the structure of huminite while a small amount of Ge was associated with residual humic acids as complex or humate. During hydrothermal transformation, the heated natural water or deep fluid from basement encountered the coal layer within tectonic weak zone. SO 2. 4 was reduced by coal organic matter. Pyrite and calcite formed. Hydrothermal process did not contribute significantly to mineralization.

关键词： Lincang superlarge germanium deposit sedimentation diagenesis hydrothermal process mineralization.

Evidence for transforming mineralization of Baiguoyuan silver-vanadium deposit hosted in black shale in Hubei,China

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1999年第3期44卷 263-267页

作者： hanping zhuang {2. lu jiamo fu jinzhong liu Chigang Ren Degang Zou Chinese Acad Sci Guangzhou Inst Geochem Canton 510640 Peoples R China fudan Univ Dept Phys 2 Shanghai 200433 Peoples R China

Baiguoyuan silver-vanadium deposit is generally thought to be of sedimentary-diagenetic origin. Based on the characteristics of barites, it is suggested that hydrothermal transformation has been involved in mineralization. The barites in black shale can be grouped into irregular ones which were formed during early diagenesis and tabular ones which were formed during late diagenesis. The tabular barites are replaced by pyrite and have formed a regular girdle around them. PIXE analysis states that Ag is greatly concentrated in pyrite replacement girdle. The girdle is the product of hydrothermal transformation. The transformation is one of the main mineralization stages of Baiguoyuan deposit.

关键词： Baiguoyuan silver-vanadium deposit barite transformation.

Two kinds of Carlin-type gold deposite in southwestern Guizhou,China

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1999年第2期44卷 178-182页

作者： hanping zhuang {2. lu jiamo fu Dehan liu guangzhou institute of{2. Chinese Academy of Sciences Guangzhou China

Based on the organic geochemical studies on two typical Carlin-type deposits in southwestern Guizhou, as well as the comparison between the two deposits in terms of geological background,igneous rock, paleo-oilfield, lithofacies and paleogeographical and geochemical features, two kinds of Carlin-type deposit were proposed: Lannigou Type and Getang Type. The former includes Lannigou,Banqi and Yata gold deposits. These deposits are hosted by turbidite, geographically situated in the southwest of the mineralized district, and related genetically to paleo-oilfields. The latter includes Getang, Zimudang and Dachang gold (mercury and thal{2.m) deposits, situated geographically in the northwest of the mineralized district where Emeishan basalt commonly occurs. These deposits are associated with reduction of coaly organic matter.

关键词： genetic type Carlin-type gold deposit southwestern Guizhou.

Organic/ Inorganic Occurrence of Metallic Elements of the Black Shale-Hosted Baiguoyuan Silver-Vanadium Deposit in Xingshan, Hubei

在线全文

学校读者我要写书评

暂无评论

Acta Geologica Sinica(English Edition) 1998年第3期72卷 299-307页

作者： zhuang hanping {2. {2. fu jiamo liu jinzhong REN Chigang ZOU Degang TIAN Weizhi guangzhou institute of{2. Chinese Academy of Sciences Guangzhou 510640 2.d Department of Physics Fudan University Shanghai 200433 Chinese Academy of Atomic Science Beijing 102413

: By means of kerogen purification, the proton induced X-ray emission (PIXE) and instrumental neutron activation analysis (INAA), the authors have studied the organic/inorganic occurrence modes of the metallic elements of the Baiguoyuan silver-vanadium deposit hosted in black shale in Hubei Province, China. The result shows that Au, Hg and Ta have a strong tendency to occur organically, with more than 70% of these elements being associated organically. Se, Ga, Ag and Hf are partly associated with organic matter, with more than 2.% of them occurring organically. Compared with the above elements, Zn, Cu, As and Sb are weakly associated organically, and tend to be enriched in kerogen. However, Mn, Th, U, V, Co, Cr, AI, Fe and Sc usually occur inorganically. Of the rare earth elements (REE), La, Ce, Tb, Dy, Yb and lu have stronger ability to be associated with organic matter than Sm and Eu.

关键词： Baiguoyuan black shale-hosted silver-vanadium deposit organic matter metallic elements occurrence modes