It is known that the lamproites occur in the southeastern Guizhou Province and in the Dahong Mountains area, Hubei Province; and many para lamproite occurrences spread in the west half part of the South China landmass...It is known that the lamproites occur in the southeastern Guizhou Province and in the Dahong Mountains area, Hubei Province; and many para lamproite occurrences spread in the west half part of the South China landmass. The para lamproite diatremes in Ningxiang County, Hunan Province, contain a few of fine grains of diamond. Parts of the kimberlite pipes and dykes in Mengyin County, Shandong Province, consist locally of basic kimberlite; and the kimberlite dykes in the Maping kimberlite area, Zhenyuan County, Guizhou Province, consist of basic kimberlite principally. Although the diamondiferous kimberlites and lamproites occur always in the cratons within continental plate, both the potassium rich ultramafic rocks display the geochemical features of the magmatism of post collision in orogenic belt. Both the kimberlite and lamproite magmas may originate from the local parts of the mantle transition zone, where the mantle contains the matter of ancestor slab of ancient subduction zone. And, both the K rich ultramafic magmas generated in an active mantle plume, which came from the boundary between the core and the lower mantle. The basic kimberlite magma may be more capable of preserving the crystals of the diamond type II.展开更多
Thallium (Tl) is a dispersed element and it seldom occurs in the form of independent minerals. So the element is hard to form any independent deposit. The world annual production of Tl is about 13 ton, most of which i...Thallium (Tl) is a dispersed element and it seldom occurs in the form of independent minerals. So the element is hard to form any independent deposit. The world annual production of Tl is about 13 ton, most of which is recovered as by\|product from non\|ferrous metal metallurgical products. Reported in this paper is the only large\|sized independent Tl deposit in the world, of which the Tl ores can be mined, ore\|dressed and smelted independently. Bio\|enrichment and hydrothermal reworking are the two important metallogenic mechanisms of this Tl deposit. This paper will give a discussion to the Lanmuchang Tl deposit in the following respects including its geological characteristics, element association of Tl, Hg, As and Au and W, sulfur isotopic composition, involvement of hallogens in metallogenesis and the metallogenic models.展开更多
文摘It is known that the lamproites occur in the southeastern Guizhou Province and in the Dahong Mountains area, Hubei Province; and many para lamproite occurrences spread in the west half part of the South China landmass. The para lamproite diatremes in Ningxiang County, Hunan Province, contain a few of fine grains of diamond. Parts of the kimberlite pipes and dykes in Mengyin County, Shandong Province, consist locally of basic kimberlite; and the kimberlite dykes in the Maping kimberlite area, Zhenyuan County, Guizhou Province, consist of basic kimberlite principally. Although the diamondiferous kimberlites and lamproites occur always in the cratons within continental plate, both the potassium rich ultramafic rocks display the geochemical features of the magmatism of post collision in orogenic belt. Both the kimberlite and lamproite magmas may originate from the local parts of the mantle transition zone, where the mantle contains the matter of ancestor slab of ancient subduction zone. And, both the K rich ultramafic magmas generated in an active mantle plume, which came from the boundary between the core and the lower mantle. The basic kimberlite magma may be more capable of preserving the crystals of the diamond type II.
文摘Thallium (Tl) is a dispersed element and it seldom occurs in the form of independent minerals. So the element is hard to form any independent deposit. The world annual production of Tl is about 13 ton, most of which is recovered as by\|product from non\|ferrous metal metallurgical products. Reported in this paper is the only large\|sized independent Tl deposit in the world, of which the Tl ores can be mined, ore\|dressed and smelted independently. Bio\|enrichment and hydrothermal reworking are the two important metallogenic mechanisms of this Tl deposit. This paper will give a discussion to the Lanmuchang Tl deposit in the following respects including its geological characteristics, element association of Tl, Hg, As and Au and W, sulfur isotopic composition, involvement of hallogens in metallogenesis and the metallogenic models.
