干旱区生态环境知识资源中心(Arid): 干旱戈壁区金属元素的垂向变化与分散以新疆金窝子金矿为例

Arid

	干旱戈壁区金属元素的垂向变化与分散以新疆金窝子金矿为例
其他题名	Vertical Variation and Dispersion of Metal Elements in the Arid Desert Regolith-A Case Study at the Jinwozi Gold Deposit, Xinjiang, China
	文雪琴 1; 王学求 2; 叶荣 3; 刘占元 2; 程志中 2; 迟清华 2
来源期刊	矿物岩石地球化学通报
ISSN	1007-2802
出版年	2010
卷号	29 期号:1 页码:38-44,51
中文摘要	本文选择被风化物覆盖(4米至几十米厚)的金窝子金矿作为研究对象.分析矿体上方风化层和非矿上方的垂直剖面中的各种金属元素的总量及活动态含量,以获得金属元素在风化层中的活动规律,为化探找矿提供方法依据.结果发现金等的某种活动态的分布模式在矿体上方呈现双层分布,即他们趋向于在垂直剖面的底部与顶部富集,而在中部降低.可以解释为元素在剖面底部风化层中的富集是由于金继承了矿体的风化产物,而在地表或近地表的富集是由于从矿体迁移至地表的元素被粘土物质和铁锰氧化物膜所吸附.
英文摘要	Desert terrains in the northwestern China are widely covered by regolith sediments, which mask geochemical signals of ore bodies and are a main obstacle to mineral exploration. It is needed imminently to study the vertical geochemical variation of metal elements and the potential transfer mechanism from the ore body to its regolith cover and to the ground surface in order to find proper samples in the field and to choose proper analytical methods in the laboratory. The Jinwozi gold deposit which is covered by regolith sediments (4 to tens of meters thickness) was selected for investigation in this paper. Samples were taken from regolith horizons in 2 vertical profiles over the deposit. It was found that the distribution pattern of Au and associated elements in the vertical profile looked like a letter "C", in other words, they tended to enrich at the bottom and the upper of the vertical profile over the ore body and deplete at the middle. Metals were enriched in weathering rocks may be due to inheritance of their high contents in the ore body, whereas metals were enriched at or near ground surface may be due to adsorption by clays or oxide coatings. Gold tends to migrate vertically to the ground surface and to be trapped by geochemical barriers, such as clay matters and oxide coatings of Fe,Mn, to produce superimposed anomalies in the regolith near or at the ground surface.
中文关键词	深穿透地球化学 ; 元素地球化学变化 ; 迁移机制 ; 荒漠覆盖区 ; 金窝子金矿
英文关键词	deep-penetrating geochemistry migration mechanism desert regolith Jinwozi gold deposit
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOLOGY
WOS研究方向	Geology
CSCD记录号	CSCD:3858888
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/225342
作者单位	1.太原理工大学,矿业工程学院, 太原, 山西 030024, 中国; 2.中国地质科学院,物化探研究所应用地球化学, 065000; 3.(北京)中国地质大学,地球科学与资源学院, 北京 100083, 中国
推荐引用方式 GB/T 7714	文雪琴,王学求,叶荣,等. 干旱戈壁区金属元素的垂向变化与分散以新疆金窝子金矿为例[J],2010,29(1):38-44,51.
APA	文雪琴,王学求,叶荣,刘占元,程志中,&迟清华.(2010).干旱戈壁区金属元素的垂向变化与分散以新疆金窝子金矿为例.矿物岩石地球化学通报,29(1),38-44,51.
MLA	文雪琴,et al."干旱戈壁区金属元素的垂向变化与分散以新疆金窝子金矿为例".矿物岩石地球化学通报 29.1(2010):38-44,51.