老挝国家尺度地球化学填图进展——以氟元素为例
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摘要
我国地球化学填图在世界上具有领先优势,老挝国家尺度1∶100万地球化学填图覆盖了老挝全境约23万km~2,分析了69种元素,填补了老挝国家尺度地球化学填图的空白,为老挝基础地质、矿产开发、环境保护、农业生产等多个方面提供了基础地球化学保障。此次研究表明,老挝氟含量在(21～2 717)×10~(-6),氟含量背景值(中位值)和平均值分别是271×10~(-6)和302×10~(-6)。老挝氟含量总体表现为北部较高,南部相对较低,其背景值明显低于我国水系沉积物中氟含量和土壤环境背景值;老挝全境共圈定了8处氟地球化学异常,面积达到地球化学省规模的有5处。
China's geochemical mapping has a leading position in the world. Laos national scale geochemical mapping,approximately 230 000 km~2 and 69 elements was analyzed. This job filled the gap of the national scale geochemical mapping in Laos, and provided geochemical support for geology, mineral development,environmental protection and agricultural production in Laos. The study showed that the fluorine content in Laos ranges from 21×10~(-6) to 2 717×10~(-6). The background(median) and average values of fluorine content are 271×10~(-6) and 302×10~(-6). The overall fluorine content in Laos is higher in the north and relatively lower in the south. The background value is significantly lower than that from the sediments of China's water sediment and the background value of soil environment.Eight geochemical anomalies of fluorine have been delineated in Laos, 5 of them reach the scale of geochemical provinces.
China's geochemical mapping has a leading position in the world. Laos national scale geochemical mapping,approximately 230 000 km~2 and 69 elements was analyzed. This job filled the gap of the national scale geochemical mapping in Laos, and provided geochemical support for geology, mineral development,environmental protection and agricultural production in Laos. The study showed that the fluorine content in Laos ranges from 21×10~(-6) to 2 717×10~(-6). The background(median) and average values of fluorine content are 271×10~(-6) and 302×10~(-6). The overall fluorine content in Laos is higher in the north and relatively lower in the south. The background value is significantly lower than that from the sediments of China's water sediment and the background value of soil environment.Eight geochemical anomalies of fluorine have been delineated in Laos, 5 of them reach the scale of geochemical provinces.
引文
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[24]贾润幸,方维萱,隗雪燕.老挝地质矿产资源及开发概况[J].矿产勘查,2014,5(5):826-833.
[25]刘发荣,田震远,李登科.老挝南部地区红土风化壳残余型铝土矿矿床成因分析及找矿[J].中国非金属矿工业导刊,2008(1):52-54.
[26]苏馈足,徐得潜,李洋,等.铝土矿除氟吸附剂制备及其性能研究[J].工业用水与废水,2008,39(6):78-81.
[27]成功,高光明,陈松岭.老挝波罗芬高原铝土矿地质特征与成矿规律[J].中南大学学报(自然科学版),2008,39(2):380-386.
[28]谢学锦,刘大文,向运川,等.地球化学块体——概念和方法学的发展[J].中国地质,2002,29(3):225-233.
[2]Webb J S,Thornton I,Thompson M ,et al.The Wolfson geochemical atlas of England and Wales[M].Oxford,UK:Clarendon Press,1978.
[3]王学求,徐善法,程志中,等.国际地球化学填图新进展[J].地质学报,2006,80(10):1598-1606.
[4] Wang X Q,the CGB Sampling Team.China geochemical baselines:sampling methodology[J].Journal of Geochemical Exploration,2015,148:25-39.
[5] Wang X Q,the CGB Sampling Team.Reprint of “China geochemical baselines:sampling methodology”[J].Journal of Geochemical Exploration,2015,154:17-31.
[6]Yao W S,Xie X J,Wang X Q.Comparison of results analyzed by Chinese and European laboratories for FOREGS geochemical baselines mapping samples[J].Geoscience Frontiers,2011,2(2):247-259.
[7]Zou R G.Exploring the effects of cell size in geochemical mapping[J].Journal of Geochemical Exploration,2012,112:357-367.
[8]Liu X M,Wang X Q,de Caritat P,et al.Comparison of datasets obtained by global-scale geochemical sampling in Australia,China and Europe[J].Journal of Geochemical Exploration,2015,148:1-11.
[9]Pereira B,Vandeuren A,Govaerts B B,et al.Assessing dataset equivalence and leveling data in geochemical mapping[J].Journal of Geochemical Exploration,2016,168:36-48.
[10]Demetriades A,Birke M,Albanese S,et al.Continental,regional and local scale geochemical mapping [J].Journal of Geochemical Exploration,2015,154:1-5.
[11]谢学锦.全球地球化学填图[J].中国地质,2003,30(1):1-9.
[12]余大富.土壤氟污染及其危害[J].环境科学,1982,6(6):70-74.
[13]朱延浙,吴军,胡建军,等.老挝地质矿产概论[M].昆明:云南科技出版社,2009:11-16.
[14]王宏,林方成,李兴振,等.老挝及邻区构造单元划分与构造演化[J].中国地质,2015,42(1):71-84.
[15] 施美凤,林方成,李兴振,等.东南亚中南半岛与中国西南邻区地层分区及沉积演化历史[J].中国地质,2011,38(5):1244-1256.
[16]王宏,林方成,施美凤.老挝及邻区主要矿产成矿规律[J].矿床地质,2012,31(S):1177-1178.
[17]卢映祥,刘洪光,黄静宁,等.东南亚中南半岛成矿带初步划分与区域成矿特征[J].地质通报,2009,28(2-3):314-325.
[18] Wakita K,Metcalfe I.Ocean plate stratigraphy in east and southeast Asia[J].Journal of Asian Earth Sciences,2005,24(6):679-702.
[19]李兴振,刘朝基,丁俊.大湄公河次地区主要结合带的对比与连接[J].沉积与特提斯地质,2004,24(4):1-12.
[20]李兴振,刘朝基,丁俊.大湄公河次地区构造单元划分[J].沉积与特提斯地质,2004,24(4):13-20.
[21]王学求.国际地球化学填图指南[R].中国地质科学院地球物理地球化学勘查研究所内部资料,2006:37-40.
[22]刘汉粮,聂兰仕,王学求,等.中蒙跨境阿尔泰构造带稀有元素锂区域地球化学分布[J].现代地质,2018,32(3):493-499.
[23]鄢明才,迟清华,顾铁新,等.中国各类沉积物化学元素平均含量[J].物探与化探,1995,19(6):468-472.
[24]贾润幸,方维萱,隗雪燕.老挝地质矿产资源及开发概况[J].矿产勘查,2014,5(5):826-833.
[25]刘发荣,田震远,李登科.老挝南部地区红土风化壳残余型铝土矿矿床成因分析及找矿[J].中国非金属矿工业导刊,2008(1):52-54.
[26]苏馈足,徐得潜,李洋,等.铝土矿除氟吸附剂制备及其性能研究[J].工业用水与废水,2008,39(6):78-81.
[27]成功,高光明,陈松岭.老挝波罗芬高原铝土矿地质特征与成矿规律[J].中南大学学报(自然科学版),2008,39(2):380-386.
[28]谢学锦,刘大文,向运川,等.地球化学块体——概念和方法学的发展[J].中国地质,2002,29(3):225-233.