Polymetallic Mineralization Potential Research Of Qimantage Area, Qinghai Province

Qimantag metallogenic belt is one of our new ten resource base in China, attached toEastern Kunlun metallogenic belt and stretched across Xinjiang and Qinghai, where manymineral resources of iron, copper, lead, zinc, gold, tungsten, tin, cobalt etc. have been found.This paper mainly discusses the iron-polymetallic resources throughout Qimantag Mountainin Qimantag metallogenic belt. Although a great deal of research works have been conductedon the iron deposits, the prospecting potential in the area remains to be unclear due to the lackof systematicness.On the basis of field geological survey, geological, geophysical and geochemical data ofthis area, the geological characteristics of the typical iron polymetallic ore deposits,petrogeochemistry, isotope, fluid inclusion, trace elements, rare earth elements of ore-hostrocks have been discussed, as well as the formation tectonic setting, ore-forming materialsources, ore-forming fluid properties,and metallogenic epoch. Based on these, mineralizationand its regularity of the iron polymetallic deposits have also been summarized, and finally,the mineralization model has been established.This paper gives an overview to the geological characteristics and geologicalbackground in Qimantag metallogenic area. The ore-bearing strata are mainly theMesoproterozoic Jixian Langyashan group, Ordovician–Silurian Tanjianshan formation andlate Carboniferous Diaosu group. The genetic types include skarn and the hydrothermal type.According to isotope dating, iron polymetallic ore deposits are principally formed inIndonian.Geological survey and comprehensive research have been carried out with theapplication of a variety of technical methods, combining multiple information related tomineralization and the existing deposit model. Comprehensive information of the mineralizednature and location has been extracted, as well as the regional ore-controlling factors. Themetallogenic prediction(resource potential and prospecting areas) showed that: firstly, thestrata (especially carbonate strata) or rock masses with small-amplitude low-gradientmagnetic anomaly distributes linearly has a favorable prospecting potentiall. Many anomaliescontrolled the distribution of main deposit in the region. Secondly, comprehensive anomaly of river sediments in1:200000scale has controlled most of the regional deposits and thoseanomaly areas without prospecting breakthroughs show considerable prospecting potential;Thirdly, a lot of skarns on the contact surface of magmatic rocks and carbonate rocks in thisregion haven’t been explored yet, which is still of good prospecting potential; Lastly, focushas always been given to the prospecting of iron, copper, lead and zinc ores, while fewattention paid to silver, tungsten, cobalt and molybdenum ores, along with rare earth elements.Therefore, new breakthroughs may be achieved in this region if emphasis is put on theprospecting of other mineral elements.