张掖盆地1990s表土层深部土壤重金属分布特征及其来源分析

何甘地, 何进忠, 牛洪斌, 张忠平

Distribution and origin of heavy metals in deep topsoil of the Zhangye Basin in the 1990s

HE Gan-Di, HE Jin-Zhong, NIU Hong-Bing, ZHANG Zhong-Ping

图3 张掖盆地表土层深部土壤与潜在生态风险指数异常物源地球化学图解 DGR—大青山花岗岩岩石;LSS—龙首山岩石;NQL—北祁连岩石;NQO—北祁连蛇绿岩岩石;DGRS—大青山花岗岩水系沉积物;LSSS—龙首山水系沉积物;NQLS—北祁连水系沉积物;NQOS—北祁连蛇绿岩水系沉积物;Q—第四系表土层深部土壤;Qp1y—玉门组洪积层表土层深部土壤;Qp2j—酒泉组洪积-冰积层表土层深部土壤; Qp 3 p l m—上更新统近河道洪积层表土层深部土壤; Qp 3 p l n—上更新统河道北砂砾层表土层深部土壤; Qp 3 p l s—上更新统河道南洪积层表土层深部土壤;Qhalpln—全新统河道北冲洪积层表土层深部土壤;Qhalpls—全新统河道南冲洪积层表土层深部土壤;Qhdeln—全新统河道北坡残积层表土层深部土壤;Qhdels—全新统河道南坡残积层表土层深部土壤;Qheol—全新统风积层表土层深部土壤;Qhl—全新统湖沼相堆积表土层深部土壤;Qhpls—全新统河道南洪积层表土层深部土壤

Fig.3 Geochemical diagrams for origins of deep subsoil and potential ecological risk index anomalies in Zhangye Basin DGR—Daqing mountain granite rocks; LSS—Longshou mountain rocks; NQL—north Qilian rocks; NQO—north Qilian ophiolite rocks; DGRS—Daqing mountain granite stream sediment; LSSS—Longshou mountain drainage sediment; NQLS—north Qilian stream sediment; NQOS—north Qilian ophiolite stream sediment; Q—Quaternary deep topsoil; Qp1y—diluvium layer of deep topsoil from Yumen Formation; Qp2j—diluvium-glacial layer of deep topsoil from Jiuquan Formation; Qp 3 p l m—diluvium layer of deep topsoil from upper Pleistocene near the river; Qp 3 p l n—sand-gravel layer of deep topsoil from upper Pleistocenein in north side of river; Qp 3 p l s—diluvium layer of deep topsoil from upper Pleistocene in south side of river; Qhalpln—alluvium-diluvium layer of deep topsoil from Holocene in north side of river; Qhalpls—alluvium-diluvium layer of deep topsoil from Holocene in south side of river; Qhdeln—eluvium-slope layer of deep topsoil from Holocene in north side of river; Qhdels—eluvium-slope layer of deep topsoil from Holocene in south side of river; Qheol—aeolian layer of deep topsoil from Holocene; Qhl—lacustrine-swamp layer of deep topsoil from Holocene; Qhpls—diluvium layer of deep topsoil from Holocene in south side of river