综合土壤和重砂测量在内蒙古扎鲁特旗坤得来扎拉格地区锡多金属找矿中的应用

doi:10.11720/wtyht.2023.1312

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Abstract

In order to clarify the prospecting direction and achieve a breakthrough, 1:10 000 soil geochemical survey and natural heavy sand survey were carried out in Kundelezalag area, and the geochemical characteristics of 10 elements such as tungsten, tin, lead and zinc in the soil and the heavy mineral characteristics of natural heavy sand were preliminarily summarized. Correlation analysis is used to analyze the symbiotic combination of elements. The geochemical elements in the area are Pb-Zn-Ag-Cu and Sn-W-Mo-Bi, in which Sn is the most enriched and differentiated, and the peak value of Sn content is more than 300×10^-6。 23 kinds of heavy minerals, such as cassiterite, garnet, ilmenite and zircon, were identified through natural heavy sand survey, and the genesis of tin polymetallic deposits in the mining area was preliminarily identified through the combination characteristics of heavy minerals, cassiterite extension coefficient and geological characteristics. Finally, according to the geochemical characteristics of elements, the distribution and combination characteristics of cassiterite and the metallogenic clues found in the anomaly area, the Cu-W polymetallic prospecting prediction area and Cu-Zn-Sn-W polymetallic prospecting prediction area in the south of Kundli-Zarage are selected.

Key words： southern Great Xing'an range geochemical anomaly natural heavy sand survey cassiterite tin polymetallic deposit

Received: 15 June 2022 Published: 11 October 2023

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	Xing YANG
	Yu-Chun GUAN
	Tao ZOU
	Wei LI

Cite this article:

Xing YANG,Yu-Chun GUAN,Tao ZOU, et al. Application of comprehensive soil and heavy sand survey in tin polymetallic prospecting in Kundelai Zhalage area, Zhalute Banner, Inner Mongolia[J]. Geophysical and Geochemical Exploration, 2023, 47(4): 868-880.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2023.1312 OR https://www.wutanyuhuatan.com/EN/Y2023/V47/I4/868

Geological map of mining area

Characteristics of soil geochemical element parameters in mining area

Variation coefficient diagram of ore-forming elements in the mining area

Correlation coefficient of soil elements in mining area

Correlation of ore-forming elements in the mining area

R-type cluster analysis pedigree of soil geochemical survey in mining area

Lower limit of geochemical anomaly of soil in mining area

Abnormal distribution of ore-forming elements in the mining area

Characteristics of heavy minerals in mining area

Prospect map of prospecting and prediction in Kundelai Zhalage area

Field mineralized hand samples and microscopic photos in the prediction area
a—cassiterite bearing quartz veinlet;b,c—wolframite bearing quartz veinlet;d—limonitized and Greisenized altered rock;e,f—lead zinc mineralized altered rock;g—wolframite micrograph;h,i—cassiterite mirror photo;Wf—wdframite;Cst—cassiterite;Chl—chlorite;Qtz—quartz

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Regional 1:200 000 geochemical anomaly analysis map
(revised according to the 1:200 000 geochemical map of Inner Mongolia^[23])

	园林子北山^[24]	维拉斯托^[21]	罕山林场^[6]	坤得来扎拉格^[25-26]
地球化学特征	主成矿元素为W、Sn、Bi、Mo,其次为Cu、Ag、Pb、Zn、Sb,并伴有Au、As、Hg元素异常,组合异常面积80 km²(1:5万)	异常按面积依次为Sn、W、As、Zn、Pb、Sb、Ag、Au、Mo、Cu,组合异常面积8.96 km²(1:5万)	发育Sn、Pb、Zn、Ag、Au、As等组合异常,组合异常面积11.2 km²(1:5万)	区内划定一丙类异常,元素组合以Sn、W、As、Au、Co为主,组合异常面积2.58 km²(1:5万)
地球物理特征	含矿岩石具低阻高极化特征	成矿中心的锡钨多金属矿对应物探测量的低重力、中低极化率、中高阻率与低磁特征,局部出现略高激电异常	高视极化率、中高视电阻率的异常	中低极化率与低磁特征
赋矿地层	上二叠统林西组,为一套海陆交互相和内陆湖相碎屑岩组合建造。岩性主要为砂岩、凝灰质板岩及少量泥岩	锡林郭勒杂岩,主体为宝音图群黑云斜长片麻岩,局部可见少量闪斜长片麻岩	上侏罗统满克头鄂博组,岩性主要为流纹质含角砾岩屑晶屑凝灰岩、流纹质含角砾岩屑晶屑熔结凝灰岩、流纹岩等	下白垩统白音高老组,岩性主要为流纹岩、流纹质晶屑凝灰岩等;上侏罗统满克头鄂博组,岩性主要为流纹岩、流纹质晶屑凝灰岩等
围岩蚀变	硅化、绢云母化、电气石化、褐铁矿化、绢英岩化等	云英岩化、硅化、褐铁矿化、锡钨钼矿化及铅锌银矿化等	硅化、绿泥石化、碳酸盐化、叶腊石化、萤石矿化等	云英岩化、绢英岩化、褐铁矿化、硅化、绿泥石化、萤石化等
金属矿物组合	锡石、黄铁矿、磁黄铁矿、黄铜矿、毒砂、磁铁矿、钛铁矿等	锡石、闪锌矿,含少量黄铜矿、黝锡矿、黝铜矿、黄铁矿、斜方砷铁矿等	黄铜矿、斑铜矿、辉银矿、方铅矿、闪锌矿、锡石等	锡石、黑钨矿、磁铁矿、黄铁矿等

Comparison of characteristics between hydrothermal vein type tin polymetallic deposits and prediction areas in the region

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