The ore-bearing belts, specialized for precious metals, are substantia ted to exist in the south Far East of Russia. The longest of which is the Amursk y gold-bearing belt extended from the Amur River mouth to the Uss...The ore-bearing belts, specialized for precious metals, are substantia ted to exist in the south Far East of Russia. The longest of which is the Amursk y gold-bearing belt extended from the Amur River mouth to the Ussuri River lowe r course and further to the southwest on China territory, probably, to the Sungar i River head. The fact that we have distinguished the Amursky and other gold-be a ring belts, make it possible to reevaluate the perspectives of the South Far Eas t of Russia and North-East China for new deposits of precious metals.展开更多
1. Material composition of the geosynclinal tectonic LayerThe geosynclinal tectonic layer is mainly composed of the following two parts: sandyslate rocks of Precambrin and volcanic rocks inbeded within the sand-slate ...1. Material composition of the geosynclinal tectonic LayerThe geosynclinal tectonic layer is mainly composed of the following two parts: sandyslate rocks of Precambrin and volcanic rocks inbeded within the sand-slate rocks.The sandy-slate rocks embrace the chemical compositional characteristics of light metamorphic rocks: SiO<sub>2</sub>=54.56<sup>8</sup>1.63（Wt%）, with average of 63.96（wt%）（n=58, the same as following）; Al<sub>2</sub>O<sub>3</sub>=9.47<sup>1</sup>7.75（wt%）, with average of 15.36（wt%）, and Al<sub>2</sub>O<sub>3</sub>】K<sub>2</sub>O+Na<sub>2</sub>O+CaO; the content of （FeO+Fe<sub>2</sub>O<sub>3</sub>） varies greatly with FeO】Fe<sub>2</sub>O<sub>3</sub>; （CaO+MgO）=0.78<sup>9</sup>.22 （wt%）with average of 23 （wt%）, and MgO】CaO; the ratios of K<sub>2</sub>O/Na<sub>2</sub>O rang from 2 to 4（】1）. By comparing all this chemical data with that of the other kind rocks, We can know that the sand y-slate rocks were the eunic and /or bathyal sediments which formed under the strongly active eugeosynclinal tectonic setting.展开更多
文摘The ore-bearing belts, specialized for precious metals, are substantia ted to exist in the south Far East of Russia. The longest of which is the Amursk y gold-bearing belt extended from the Amur River mouth to the Ussuri River lowe r course and further to the southwest on China territory, probably, to the Sungar i River head. The fact that we have distinguished the Amursky and other gold-be a ring belts, make it possible to reevaluate the perspectives of the South Far Eas t of Russia and North-East China for new deposits of precious metals.
文摘1. Material composition of the geosynclinal tectonic LayerThe geosynclinal tectonic layer is mainly composed of the following two parts: sandyslate rocks of Precambrin and volcanic rocks inbeded within the sand-slate rocks.The sandy-slate rocks embrace the chemical compositional characteristics of light metamorphic rocks: SiO<sub>2</sub>=54.56<sup>8</sup>1.63（Wt%）, with average of 63.96（wt%）（n=58, the same as following）; Al<sub>2</sub>O<sub>3</sub>=9.47<sup>1</sup>7.75（wt%）, with average of 15.36（wt%）, and Al<sub>2</sub>O<sub>3</sub>】K<sub>2</sub>O+Na<sub>2</sub>O+CaO; the content of （FeO+Fe<sub>2</sub>O<sub>3</sub>） varies greatly with FeO】Fe<sub>2</sub>O<sub>3</sub>; （CaO+MgO）=0.78<sup>9</sup>.22 （wt%）with average of 23 （wt%）, and MgO】CaO; the ratios of K<sub>2</sub>O/Na<sub>2</sub>O rang from 2 to 4（】1）. By comparing all this chemical data with that of the other kind rocks, We can know that the sand y-slate rocks were the eunic and /or bathyal sediments which formed under the strongly active eugeosynclinal tectonic setting.
