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| The application of regional geochemical exploration results to the geological mapping of the North Bayan Har Mountains area, Qinghai Province |
| Guo-Dian BAI1,2, Kai HE1,2, Gen-She JU3, Kun WANG1,2, Yan-Hui WANG1,2, Lan-Lan LI1,2 |
1. Henan Institute of Geological Survey,Zhengzhou 450007,China
2. Key Laboratory of Ore Forming Processes and Resources Utilization of Metal Minerals in Henan Province,Zhengzhou 450007,China
3. Henan Institute of Geological Sciences, Zhengzhou 450007, China |
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Abstract With the help of regional geochemical exploration results, especially the geochemical maps of different elements, geological interpretation can serve as an important auxiliary means of geological mapping in the North Bayan Mountains, Qinghai Provence, thus significantly improving the mapping efficiency and accuracy. The results show that regular content changes of elements such as some rare elements and rare earth elements like Y, Nb and sulfur group elements as well as iron group elements like Cu, Zn, Cr, Co, and Ni in different units of the Bayan Har Mountain Group can be used as important means in internal stratigraphic division and regional stratigraphic correlation of the Bayan Har Mountain Group. Furthermore, faults can be inferred and mapped; especially hidden faults and regional faults in shallowly-covered areas can be recognized and mapped remarkably effectively by using certain element anomalies with spotted and beaded characteristics along the faults (such as Sb, Hg, Bi and Pb) as well as along the straight boundaries of geochemical divisions (such as Sb, Bi, As and Pb).
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Received: 22 June 2017
Published: 04 June 2018
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| 组分 | 岩屑组分含量/% | 基质组分含量/% | 填隙物(胶结物)含量 /% | 火
山岩 | 砂岩 | 硅
质岩 | 泥钙
质岩 | 石英 | 长石 | 方
解石 | 白
云母 | 黑
云母 | 锆石 | 绿
泥石 | 绢
云母 | 菱
铁矿 | 铁质 | 硅质 | 泥质 | 钙质 | 巴
颜
喀
拉
山
群 | 昌
马
河
组 | 砂岩 | 0~5 | 0~16 | 5~20 | 0~23 | 35~70 | 15~35 | | 2~5 | 0~3 | 0~微量 | 0~5 | 0~3 | 0~7 | 0~1 | 0~8 | 0~15 | 0~40 | | 粉砂岩 | | | 0~12 | | 40~65 | 10 | | | | | 5~7 | 0~8 | | | | 5~15 | 0~20 | | 板岩 | | | | | 7~25 | 3~5 | | | | | 0~5 | 15~30 | | 0~3 | | 20~55 | 0~15 | | 千枚岩 | | 0~4 | | | 20~60 | 0~15 | | | | | | 30~55 | | | | | 0~6 | 甘
德
组 | 砂岩 | | 0~3 | 4~10 | 0~10 | 45~70 | 13~40 | | 少量 | 0~少量 | 0~微量 | 0~3 | 0~少量 | | 0~6 | 0~3 | 2~10 | 0~18 | | 粉砂岩 | | | | | 50~70 | 5~8 | | 0~少量 | | | | | 0~8 | | | 7 | 22~30 | 清
水
河
组 | 砂岩 | 0~25 | 0~12 | 10~20 | 4~15 | 25~70 | 12~22 | | 1~3 | 0~4 | | 0~8 | 1~5 | 0~2 | 0~6 | 0~10 | 0~10 | 0~2 | | 钙质粉砂岩 | | | 8~10 | | 33~42 | 8~12 | 16~33 | 微量~1 | | | | 3~12 | | 1~2 | 3~4 | 7~10 | 0~4 | | 粉砂岩 | | | 10~18 | | 35~65 | 10~20 | 0~15 | 微量~1 | 0~少量 | | 4~7 | 5~12 | | 1~3 | 5 | 10~15 | |
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