Research On Geogas Exploration Methods For Lithium Energy Mineral Deposit

Lithium,as an energy mineral,has gradually increased its demand.But at present,it lacks effective exploration techniques.Under the support of the national deep exploration of the major special project "Demonstration of deep-seated detection technology for lithium energy metal mineral bases",this paper adopts the method of Geogas measurement for the first time,and supplements soil X-ray fluorescence measurement as the supplement.The characteristics of the anomal Geogas field and x-fluorescence anomaly field caused by ore deposits above the pegmatite type lithium ore were studied,and the Geogas and soil X-ray fluorescence measurement for the typical exploration area of the pegmatite type lithium ore are carried out in the Ka Lu'an of Halong pegmatite mine area.On the basis of confirming that the two technologies can effectively detect hidden lithium deposits,the working methods,anomalous characteristics,and data interpretation and interpretation principles for the exploration of concealed pegmatite lithium deposits by Geogas and X-ray fluorescence measurements were studied.and preliminary confirmations were made.With the cooperation of the two measurement techniques,initially established a new prospecting method for the exploration of the pegmatite lithium deposits in the area.In order to confirm the feasibility of the pegmatite type lithium Geogas measurement and the characteristics of the anomalous field caused by lithium ore,Our research team set up a simulation model of Geogas of lithium deposits based on the combination of pegmatite type lithium deposit and surrounding rock(schist)in the area of Jia jika,and develop a simulation experiment of anomalous fields caused by lithium ore.The experimental results show that Li,Rb,Cs and other elements have a significant role in indicating the pegmatite type lithium deposits,and its effectiveness has been confirmed in the results of Geogas measurements carried out in the exploration area.In addition,we performed X-ray fluorescence measurements on rock specimens and drilling cores at a lithium mine in Jia jika,and we have obtained elements and combined features that are indicative of different lithologies such as pegmatite and schist.The conclusion points out that the contents of Rb and Nb in pegmatite are high,while those in Fe and other elements are relatively low;the contents of Rb,Nb and other elements in the surrounding rock are low,while the contents of Fe and other elements are relatively high.Based on this,it can be used as a basis for identifying abnormal X-ray fluorescence in soil.On the basis of the above research work,the Karuyan pegmatite lithium exploration area in Xinjiang was used as the research area.Two survey lines were designed to cross seven proven pegmatite lithium deposits.We had tested completed 190 measurement points for ground gas measurements and soil X-ray fluorescence measurements at 230 sites.This paper focuses on a comprehensive analysis of the contents of six elements Li,Rb,Nb,Y,Cs,and Be,and the contents of Rb,Y,and Mn in soil X-ray fluorescence measurements.And based on the actual data obtained from the analysis,9 abnormal areas(include 4 anomalies and 5 unknown anomalies)were identified for the two survey lines.By comparing the anomalous characteristics of the anomalous area of ore in the X-ray fluorescence of soil and soil,reveals the relationship between abnormalities in the fluorescence of Geogas and soil X-ray and the pegmatite type lithium deposits,In addition I analysis and summary of its influencing factors and application scope.The conclusion points out that abnormal concentrations of some elements in the soil can indicate pegmatite veins,and abnormal Geogas can provide indications for deep and mineralized pegmatite lithium deposits: Geogas anomalies in the six elements of Li,Nb,Cs,Be,Rb,and Y are often found on the inclined side of the pegmatite vein,while there is often no abnormality of the Geogas in the outcrop area.And above the unmineralized pegmatite veins,there are no abnormal Geogas measurements.In addition,the contents of Mn,Rb,and Y elements in the soil will show obvious abnormal reactions in the area where the pegmatite veins emerge(with unmineralized pegmatite veins).According to the research results of the thesis,the anomaly and combination features of effective indicator elements in Geogas measurements and soil X-ray fluorescence measurements can be used as an indicator for future exploration of pegmatite-type lithium deposits.The study of this article also confirmed that Geogas measurement can provide a new technical means for the exploration of the deep pegmatite-type lithium deposits in the future.