| XingRen Lanmuchang as the study object in this thesis.Through data collection and data analysis of regional geological and geochemical research work.Through the field to collect rock analysis of elements.Find out that gold,mercury,thallium ore combination of elements in the ore body and surface.Using the method of analysis of tectonic geochemistry,R type extracting beneficial metallogenic elements,ore-forming elements in the ore body and the surface show a combination of elements and characteristic parameters,combined with the tectonic ore-controlling regularity to provide a theoretical basis for underground orebody.Through work,gold,mercury,thallium ore for type stratabound ore deposit,the gold deposit is mainly distributed in the upper Permian series of unconformity interface structure corrosion variations(SBT)and the upper Permian series,the characteristics of buried depth and multi-layer,orebody for layer or lenticular distribution.Mercury,thallium mineral in the Permian system,there are small orebody in the Triassic,the characteristics of multi-layer distribution of orebody is layered,lenticular distribution.Ore buried in the anticline axis and secondary fracture on both sides of the fracture,secondary fractures can let hydrothermal process and stored in the fracture.Studies on minerals have revealed that Au,Hg,and Tl are related to hydrothermal alterations.Silicification and baratization gradually weakened in gold,mercury,and Thallium ore,and less in Thallium ore,more in the Mercury thallium ore;realgar or orpiment not search in gold ore,and mercury less than thallium ore.Au is present in silicate minerals in silty clay and limestones.Au is predominantly present in pyrite in claystones.Part of the gold is in free form in silty clay rocks and limestone.pyrite,arsenopyrite and cinnabar were the order of congeal crystal.In the process of decreasing the hydrothermal temperature,pyrite,arsenopyrite,barite,dolomite and cinnabar are mainly produced.The main minerals produced under the conditions of sulfur-rich and low-temperature are pyrite,arsenopyrite,realgar,estradiol,rubidite,thioarsenite,mercury,antimony ore,and cinnabar.The distribution of macroelements,trace elements,and rare earth elements in wall rocks and Mercury thallium ore deposits is similar,and the gold deposits are slightly different.The mining fluid is alkaline,rich in carbon dioxide,and has the characteristics of acid-alkaline andredox changes.Gold ore is easily produced under alkaline reduction conditions,and mercury ore is easily produced under the condition of low-temperature alkaline reduction,and thallium ore is easily produced under low-temperature alkaline neutral conditions.When the alteration is strong,it tends to form an independent mercury deposit or thallium deposit.The elemental combination of gold in the ore body is Au-Hg-Tl-As-Zn;The elemental combination exhibited by mercury is Hg-Tl-W-Zn-Cu-Au;the element combination exhibited by lanthanum is Tl-Hg-Au-W-Cu-Zn.Au shows an elemental composition of Au-Ag-Sb-Hg on the surface,Hg shows an elemental combination of Hg-Au-Tl-As,and Tl shows Tl-As-Hg-Sn.During the process of hydrothermal uplift,after a series of chemical reactions,different combinations of elements are shown on the surface,and the correlation between Au and Hg and Tl is weakened.Ag and Sb can be used as indicator elements for Au surface prospecting,and As and Sn can be used as indicator elements for Hg and Tl. |
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