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Changsha, China

From energy needs of our country, this paper introduces the demand for uranium ore with the development of nuclear power; The author parses the achievement of uranium deposits prospecting and existing problems in the past 40 years; The author analyzes statistically about reserves distributing and deposit location of the five types uranium deposits in central south China; The paper focuses on the metallogenic characteristics and prospecting perspective of granite type and carbonate-siliceous-pelitic rock type uranium deposit, which are the most distinctive features kinds in central south China. From the geophysics and geochemistry about uranium metallogenic, this paper points out the rock external contact zone sub-type is the major prospecting direction in the future and gives out the specific prospecting zone according to the actual data mastered; As for the huge reserves, low grade and thin layers of carbonatesiliceous-pelitic rock type uranium deposit, from more kinds and high contents features of the useful associated elements, the author proposes that through the new way of comprehensive development and comprehensive utilization is the key to make it come true in this region, which utilize potential low grade uranium resources fully and reasonably. Source

Ye Q.-S.,Research Institute No 230
Wutan Huatan Jisuan Jishu

Computing and determinating of vertical zoning sequence of indicator elements for a deposit is one of important research contents on geochemical exploration, especially on primary halos of a deposit. Many computing methods on it have been proposed by geochemists at home and abroad. The common computing methods are introduced in this paper such as the Gregorian's zonality index method; the generalized contrast value methods the concentrated barycenter method; the concentrated index method; the proportion index method; element concentration gradient method and so on. The advantages and disadvantages of these methods are summarized. It is concluded that the Gregorian's zonality index method, which is a taditional method, is inappropriate and the generalized contrast value method; the concentrated barycenter method and the concentrated index method should be used to determinine the vertical zoning sequence of indicator elements about primary halos for a deposit. Source

Zou M.-L.,Research Institute No 230 | Shu X.-J.,Research Institute No 230 | Fan L.-T.,Research Institute No 230 | Liang Y.-D.,Research Institute No 230
Bulletin of Mineralogy Petrology and Geochemistry

This paper discusses the content and interrelationship of major element, large-ion lithophile elements (LILE), high field strength elements ( HFSE) and rare-earth element (REE) in four rock types such as granite, poor-alteration granite, potash and kiesel metasomatic granite of uranium-bearing granite mass, Motianling area. The uraniferou potash metasomatic granite is shown intensive K-feldspar alteration, chloritization and poor hematitization, and the uranium content is related with secondary blotite intently. The uranium content in uraniferou kiesel metasomatic granite is relevanted to ferruginous matter which was associated with microcrystalline quartz. Dissect the geochemical behavior in different rock types, judge that the element which included in mineralizing fluid have been released from granite, uraniferou rocks were shown low K/Rb (L) , low Ba/Rb (L) and high Rb/Sr (H) apparently, and the reinforce of uranium mineralization was accompanied with the decrease of K/Ba, Rb/Sr and increase of Ba/Rb value. The content of HFSE and REE were shown conjugate decrease and increase and HREE enrichment relatively in uraniferou potash and kiesel metasomatic granite. Submit that the superimposed of multiple phase mineralizing fluid accompanied with fault unsealing was favour of uranium enrichment, the characteristic of LLH and the decrease of K/Ba, Rb/Sr with increase of Ba/Rb could be acted as the geochemistry distinguish foundation of uranium-bearing granite mass. Source

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