绿松石的形成因素

2025-03-12 04:41:42
推荐回答(3个)
回答1:

绿松石经过现代矿物学研究分析,发现其本质是一种含水的铜铝磷酸盐,归类于磷酸盐矿物质。绿松石由水流沉淀而生成,它生成过程中的重要媒介是雨水,雨水渗入地下时,其所携带的一部分化学物质变为弱酸性,经过足够的时间孕育后,这些水会溶解岩石。如果被溶解的岩石中含有铜和铝,而且恰好流经含可溶性稀有磷元素的岩石,那么当这些含有铜、铝、磷元素的特殊水溶液达到饱和程度的时候,这些化学元素会以新矿物的面貌沉积在岩石的缝隙中,绿松石的矿床就这样形成了。这在地质上被称为外生淋滤成因。
绿松石产在近地表浅层,深度一般不超过30米。在一些绿松石矿床下面还可以找到含铜,含金的金属矿床,地质学家根据是否具有多金属矿床,而将绿松石矿床分为两大类:一类是只具有分散金属矿化的绿松石富集带,一类是具有强烈金属矿化在其上部发育的次生硫化物富集带。优质的绿松石通常产在前一类的富集带中。
实际上,松石矿的形成环境并不相同,它受到多种因素制约。松石矿一般分布在含有铜硫化合物,含磷层或含磷灰石矿物及围岩铝质含量较高的地区。主要是在近地表的氧化带内,经风化淋滤作用形成的,湖北等地的绿松石就是这样形成的。绿松石的矿体结构呈结核状及壳状者居多,这正是其因低温、低压下风化淋滤作用形成的证据。

绿松石又称松石、土耳其玉、突厥玉,经过现代矿物学研究是一种含水的铜铝磷酸盐,归类于磷酸盐矿物。这是一种水流沉淀生成的矿物。绿松石在液态浸流沉淀生成的过程中颜色从蓝、绿色到浅绿、浅黄色。硬度因成矿过程中结晶压力和后期压力和风化条件导至差异较大,绿松石在现代宝玉石鉴定分类中被列为半宝石,其中蓝色的为贵重首饰石品种,蓝色及蓝绿色翠绿等色彩纯正,结构致密者皆可为高端艺术雕刻的首选,绿松石因其绝美的色泽是一种东西方传承共赏的宝玉石。绿松石是铜和铝的磷酸盐矿物集合体,以不透明的蔚蓝色最具特色。也有淡蓝、蓝绿、绿、浅绿、黄绿、灰绿、苍白色等色。长波紫外光下,可发淡绿到蓝色的荧光。绿松石质地不很均匀,颜色有深有浅,甚至含浅色条纹、斑点以及褐黑色的铁线。致密程度也有较大差别,孔隙多者疏松,少则致密坚硬。抛光后具柔和的玻璃光泽至蜡状光泽。优质品经抛光后好似上了釉的瓷器,故称谓“瓷松石”。

回答2:

绿松石的形成发生在地表下接近正常温度的压力中,它的生成过程中的重要媒介是雨水,当雨水下落并渗入地下时携带的一些化学物质变为弱酸性,经过足够的时间孕育后,这些水会溶解岩石,溶解的岩石必须是含铜矿的岩石,而且溶解要流经某些含可溶解的稀有磷元素岩石。

回答3:

《家明说松石》绿松石是如何形成的?

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