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赞比亚祖母绿:世界第三供应地|彩宝石与矿物集萃

【摘要】:之后的数年,又陆陆续续发现了不少新矿,使赞比亚成为当今世界上第三个主要的祖母绿供应地,占世界总量的15%,仅次于哥伦比亚和巴西。赞比亚祖母绿呈鲜亮的绿色,或带有蓝色调的绿色。小克拉宝石的颜色与哥伦比亚祖母绿十分相似。竹节状阳起石、透闪石和褐铁矿、磁铁矿是赞比亚祖母绿内含物的典型特征。

Brazil

巴西祖母绿的内含物特征:

·气液二相包体

·黑云母

·方解石

·白云石

·石英

·黄铁矿

·赤铁矿

·磷灰石

·透闪石

·巴西祖母绿中的气液二相包体

·巴西祖母绿中的方解石和白云石内含物

·云母片岩型的祖母绿,呈黄绿色,色泽较暗,透明度较低,瑕疵较严重,内含物最常见的有气液二相包体、黑云母、白云石、黄铁矿等

(Zambia Emerald)

赞比亚祖母绿

早在1928年就有报道,在赞比亚Ndola Rural地区的Miku River 河流地带发现祖母绿。但数量太少,不够形成市场供应规模。直到1970年代中期,在Miku西南5千米的区域新发现了Kamakanga 和Pirala 矿后,逐步形成大量且稳定的开采。之后的数年,又陆陆续续发现了不少新矿,使赞比亚成为当今世界上第三个主要的祖母绿供应地,占世界总量的15%,仅次于哥伦比亚和巴西。赞比亚祖母绿呈鲜亮的绿色,或带有蓝色调的绿色。小克拉宝石的颜色与哥伦比亚祖母绿十分相似。竹节状阳起石、透闪石和褐铁矿、磁铁矿是赞比亚祖母绿内含物的典型特征。

Zambia is the third largest producer of emeralds today. The emeralds there were first found at the Miku River in the Ndola Rural District as early as 1928, but these deposits produced inferior emeralds that were of little interest. It wasn’t until the mid 1970’s when mining shifted to the Kamakanga and Pirala mines 5 km southwest of Miku that large, high-quality emeralds were found. These mines produced a considerable quantity of emeralds, and further deposits were discovered in the following years. The emeralds in Kamakanga mainly occur in metasomatic zones between tourmaline veins and mafic talcschist.

·赞比亚祖母绿矿