The paper goes into details on the relation of the fineness of gold and electrum with gold metallogenetic epoch, depth, pressure and temperature, stages of mineralization, degree of metamorphism, deposit type and pH & Eh values of solution.
The deposit type of the Side lead zinc copper deposit in Guiping city is thought to be hydrothermal deposition type lead zinc copper deposit based on the research of the regional geological background,geological characteristics of the deposit,mineral assemblage,texture and structure,ore source of the deposit.
Gold deposit of Jianchaling has the close relation with ultrabasic rock in the space and time and the origin, still is the first example in the Qinling orogenic zone, in our country also is the rare golden ore deposit type, its unique geological background and the mineralization characteristic has the important research significance.
By studying and comparing the iron mineralization pedigrees in Altay, in eastern Tianshan and in the north margin of the North China landmass, the author believes that it is possible to discover new mineralization, new ore deposit type and new ore bodies around and/or below the existing orebodies in mining areas via a new assessment of the resource potential and new prospecting works.
The identity and the successiveness of the metallogenic material sources are used for the classification of the metallogenic system as four subsystems as shown below: (1) The metallogenic system of metamorphic gold deposit established on the basis of material sources of greenstone formation and composed of various ore deposit type assemblages. This system occurs mainly in the metamorphic area of the upwarping zone in the palaeo continents.
This paper deals with PGE ore deposit type, establishes the minerogenetic series of PGE ore deposits, divides zones rich in PGE resources and points out prospecting potential for PGE ore deposits based on tectonomagmatic evolution in Panzhihua-Xichang area.
The deposit types of main minerals include the submarine volcanic-hydrother-mal type or volcanic exhalation-sedimentary type(Cu polymetallic ore deposits),submarine hydrothermal-sedimentary type(Cu ,Pb,Zn etc.) ,porphyry type(Cu and Mo )and contact metasomatic and post-magmatic subsurface hydrothermal fluid filling compound type(Cu ,Pb and Zn ).
Orogenic metallogeny includes orogen style and its tectonic evolution, main ore deposit types, series and oreforming models, oreforming environments and controlling factors, ore material, fluid and oreforming mechanism, the chronology of tectonics, rock formation and oreforming, ore deposit change and conservation after its formation, oreforming regularity in orogen and regional ore resources potential evaluation etc.
(4)Researching on those factors controlling the diversity of ore deposit types in a metallogenic system,may be helpful for us to assess the potentiality of discovering new type ore deposits in a certain region.
China has made important advancements in the research of superlarge ore deposits and especially in classification, selectivity and confinement of deposit types and temporal and spatial distributions.
The metallogenic evolution indicated that different geotectonic evolution periods had not only different characteristics of mineralization commodity and mineral deposit types, but also the progressive mineralization feature.
Furthermore, it brought on the diverse Cu-Au-polymetal mineral deposit types and metallogenetic epoch from north to south and from west to east.
Localized in a Proterozoic basement in the Parana state, the Ribeira fluorite district is such an example composed of three deposit types with distinct geological and geochemical characters.
A variety of deposit types are present, in particular pegmatite, vein and greisen styles of mineralization.