ZHANG Quan-jiang1, LIU Ying-ping2,3, BAI Jun1, XU Wei1, HE Ming-you1*
(1. College of Earth Sciences, Chengdu University of Technology, Chengdu 610059, China;
2. Sichuan Geological Survey, Chengdu 610081, China;
3. Key Laboratory of the Evaluation and Utilization of Strategic Rare Metals and Rare Earth Resources of Sichuan Province, Chengdu 610081, China)
Abstract: The Dashuigou tellurium (Te) deposit is the only known independent Te ore deposit in the world so far. How to prospect such kind of deposit is a big problem at present. Samples were collected during the 1/50,000 stream sediment survey in the study area were analyzed by using inductively coupled plasma-mass spectrometry (ICP-MS), X-ray fluorescence spectrometry (XRF), atomic absorption spectroscopy (AAS), and emission spectrometry (ES), respectively. In the study area, Te, Au and Ag anomalies of stream sediments are locally distributed, with great possibilities for mineral exploration. However, the contents of Te, Bi, Au and Ag are generally not high in the Dashuigou Te deposit and vicinity, with no obvious anomaly. There are significant correlations between Te and Bi, Au and Ag. The paragenetic association of Te-Bi-Au-Ag is regarded as indicator elements for prospecting tellurobismuthite deposit. The substantial tellurobismuthite mineralization anomalies can be effectively delineated by using the anomalies of w(Te+Bi)/w(Au+Ag) ratios which provide new clues and directions for prospecting tellurobismuthite deposit. With the combination of comprehensive ratio anomalies, geological and structural information, five targets were identified for prospecting Te mineral resources. Acturally, Te-Bi-bearing pyrite veins have been already found locally in some of these targeting areas during the on-site verification of geochemical anomalies.
Keywords: The Dashuigou Te deposit; stream sediments; characteristics of paragenetic elements; ratio anomaly; prospecting significance
ACTA MINERALOGICA SINICA Vol. 39, No.2, 2019, page 192-200
