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湖南益阳南郊古火山岩区位于雪峰隆起中段,与洞庭凹陷接壤部位.该区历来是湖南砂金特别是块金(狗头金)的重要产地.据史载公元一世纪时益阳山溪冲出一块重九斤八两,十一世纪时又冲出生金数百斤,其中一块重49斤.1983年6月14日,在本区北部地表以下3米左右的砾石层中,发现一块重2160.8克含金92%,纯金达1987.94克巨型金块.同年7月又在该地挖得一块重1511.49克,含金91.990%,纯金1360.57克的块金.现代细谷砂金、
Ancient volcanic rocks in the southern suburb of Yiyang, located in the middle of the Xuefeng uplift and bordering the Dongting Sag, have always been an important source of Hunan sapphire, especially the gold nugget, which, according to historical records, Nine pounds eighty-two, the eleventh century and out of gold a few hundred pounds, of which a weight of 49 jins. June 14, 1983, in the northern part of the area about 3 meters below the surface of the gravel layer, found a piece of weight 2160.8 grams Gold 92%, 1987.94 g gold giant gold bullion. In July the same year and dug in this area a piece of 1511.49 grams of gold, 91.990% gold, gold 1360.57 grams of gold. Modern fine sand gold,