新疆东准噶尔北部荒漠区金属矿床白茎绢蒿植物地球化学异常特征及其找矿意义  

Phytogeochemical Characteristics of Seriphidium terrae-albae(Krasch) Poljak in the Metallic Ore Deposits in North Part of East Junggar Desert Area,Xinjiang and their Prospecting Significance

作　　者：宋慈安[1] 宋玮[2] 丁汝福[3] 雷良奇[1] 

机构地区：[1]桂林理工大学广西隐伏金属矿产勘查重点实验室/地球科学学院,广西桂林541004 [2]广东工业大学计算机学院,广东广州510006 [3]北京矿产地质研究院,北京100145

出　　处：《大地构造与成矿学》2017年第1期122-132,共11页Geotectonica et Metallogenia

基　　金：国家自然科学基金项目(41363003;40972220)资助

摘　　要：东准噶尔北部荒漠区植被属土砾质荒漠植被类型,占优势的植物群落为白茎绢蒿(Seriphidium terrae-albae(Krasch)Poljak),覆盖度为20%~25%。为探讨植物地球化学方法在荒漠区找矿的有效性,本文选择了隐伏于荒漠覆盖下的喀拉通克铜镍矿、希勒库都克铜钼矿和阿克塔斯金铜矿作为实例,研究生长在这些矿床地表的白茎绢蒿植物地球化学异常特征及其与矿化的关系。研究发现:这些矿床上部均发育植物地球化学综合异常,综合异常的宽度略大于矿体或矿化带的宽度,异常元素组合具有套合性和分带性。本文认为:(1)植物异常中强度较高、清晰度及连续性较好、规模较大的主导元素组合及其异常参数可以作为区分不同矿化类型的标志或指标,进而圈定成矿靶区;(2)植物综合异常的空间分布及其套合性和分带性,能大致确定隐伏矿床(体)的位置;(3)植物异常的元素组合、异常规模和异常强度,能大致推测隐伏矿床(体)的埋藏深度和矿化规模。The vegetation in the desert area of the north part of East Junggar, Xinjiang, is typical soil gravel hungriness. Seriphidium terrae-albae （Krasch） Poljak is dominant floral community in the area with a coverage of 20%-25%. In order to probe into the effectiveness of phytogeochemieal prospecting in the desert area, the authors chose the Kalatongke Cu-Ni deposit, Xilekuduke Cu-Mo deposit and Aketasi Au-Cu deposit as examples, and studied the phytogeochemical characteristics of Seriphidium terrae-albae （Krasch） Poljak which grows at the surfaces of these deposits and checked the relationship with mineralization. These three deposits are hidden deposits buried in the desert. The results show that： firstly, there is a botanogeochemical composite anomaly above each of the three ore deposits, and the anomalous element combinations are Cu, Ni, As, Ag, Pb, Bi, Sn, Sb for the Kalatongke Cu-Ni deposit, Mo, Cu, Au, W, Bi, Sn, Mn, Hg, Sb, As, B for the Xilekuduke Cu-Mo deposits, and Au, Cu, Hg, Mo, Zn, As, Sb, Ag for the Aketasi Au-Cu deposit; second, the anomaly width is lager than that of the ore body or the mineralization belt; and third, the anomalies are characterized by consistence and zonation. The results suggest that botanogeochemical anomalies are useful in detecting ore mineralization, distinguish types of ore mineralization and depth of burial, and can be used in prospecting operations.

关 键 词：找矿意义 植物地球化学异常 白茎绢蒿 金属矿床 荒漠 东准噶尔北部 新疆 

分 类 号：P632.4[天文地球—地质矿产勘探]