【摘要】 <正> 阳储岭杂岩体是赋存大型钨钼矿床的中酸性浅成复式岩体,因此引起许多专家的注意,并发表了论述(陈炳才等,1982、1984;张大椿等,1984)尤以江西地质局916队对矿床地质的详细工作,为各学科的研究提供了基础地质资料。本文根据岩石化学、同位素、稀土元素及包裹体研究等方面工作的结果,从岩浆作用的整体,讨论了岩浆来源、演化及岩体和矿床形成条件等问题。更多还原

【Abstract】 The following conclusions were obtained from this paper.1. The magma formed Yangchuling Complex, based upon Oxygen and Strontium isotope data, was derived from a magma chamber mixed upper mantle and crust materials and began crystallization differentiation at depth of about 8 Km.2. The magma at depth of 8 Km was crystallized in weakly reduction condition of 1000-1180℃ and 10^-13 bars of oxygen fugacity. The granodiorite and monzogranite-porphyry were emplaced in order at about 2 Km depth 141.0±1.3 m,y, ago, When the upper part of the monzogranite porphyry body was conso- lidated and the lower part was not consolidated the explosion-breccia and selfbroken of crystals of monzogranite was produced because of decreasing pressure, which provided passages of ore-forming hydrothermal liquid and ore-reservation space.3. The regular variation of SI and CI values and REE distribution patterns of the rocks which belong to Calc-alkaline series shows that the magma came from the same source and invaded one by one during the differentiation. The logSI-X plot shows that there is no obvious contamination, and that potassic hydrothermal alternation occured, which is premise forming the tungsten ore deposit in the later stage of the magmatism.4. There existed clear stages and pulsations during the formation of the complex and they could be divided into two stages, i.e. magma and volatilerelease stages. The latter has four times of pulsating-gas-release causing tungsten enrichment at 295-340℃ and forming molybdenum ore-deposit at 130-200℃.They are under very weak reduction condition,although oxygen fugacity at 295-340℃ is lower (10²⁵bar)than in the rock-forming stage, ferric-ion is superior in the liguid, so that only scheelite, not wolframite, can be formed.5. The hydrothermal Iiquid forming the ore-deposit mostly came from the magma on the basis of the sulfur isotope data, only a litlle mixes with rain.The tungsten-molybdenum enrichment derived from the hydrothermal liquid occurred under condition of boiling and evaporation caused by pressure-decreasing.更多还原