1∶50 000 Geochemical Dataset of Shilipu and Huangzhuguan Map-sheets, Changba Ore Concentration Area, Gansu Province

Changba area, Gansu Province is located in Changba-Yeshuiheariscan andIndosinian Pb-Zn-Ag-Au metallogenic zone. During the implementation of the project titledProspecting Prediction of Changba Ore Concentration Area, Gansu Province initiated by theDevelopment and Research Center of China Geological Survey, the existing data on geology,geophysics, geochemistry, remote sensing, mineral distribution, and prospecting indicators ofChangba area, were further processed. Most importantly, a 1∶50 000 tectonic-geochemicalsurvey of Shilipu and Huangzhuguan Map-sheets was carried out. A total of 8 694 sampleswere mainly collected from altered rocks and fillings in structures, with a mean samplingdensity of 13.02 samples per km2. Among them, 2 911 samples were used for tectonicgeochemicalanalysis. Nineteen elements (i.e. Au, Ag, Cu, Pb, Zn, As, Sb, Bi, Hg, W, Sn, Mo,Cd, Cr, Co, Ni, Mn, Ba, and B) were analyzed using the inductively coupled plasma-massspectrometer (ICP–MS), atomic fluorescence spectroscopy (AFS) and perpendicular electrodeemissionspectrometry (ES). As a result, the distribution regularity of major metallogenicelements (i.e. Pb, Zn, and Au) and their associated elements were generally ascertained, therelations of these elements with stratum and structures were identified, and three prospectingareas were proposed. Based on this, a 1∶50 000 geochemical dataset of Shilipu andHuangzhuguan Map-sheets, Gansu Province (also referred to as the Dataset) was finallydeveloped. It consists of one data table and an atlas. The former is composed of the primaryanalysis data of 19 elements for 2 911 samples and the later includes one sampling pointbitmap, 19 element geochemical maps, five element-association anomaly maps, one integratedanomaly map, and one interference and interpretation map. A total of 344 single-elementgeochemical anomalies and 24 integrated anomalies were newly discovered in Changba area.Meanwhile, Combining with the information on geology, minerals, geophysical prospecting,geochemical prospecting and remote sensing, one Au prospecting target and two Pb-Znprospecting targets were delineated. The Dataset could provide geochemical information formineral geological surveys and serves as an important reference for deep mineral prospectingprediction and basic geological research of Changba and its surrounding areas.