X.-B. Liu’s scientific contributions

Gold Mineralization of the Shihu deposit can be divided into 4 stages, pyrite-quartz stage, quartz-pyrite stage, polymetallic sulfide stage and quartz-carbonate stage. Cell parameters of pyrite and quartz from 4 stages were analyzed in this paper. The analytical results of pyrite indicated that the value of &Q and uo is minimum in UJ stage; the values of a- and u0 decrease as mineralization stage proceeds from I to IV and as the depth of ore-body increases from 560 to 180 meters. The analytical results of quartz indicated that the values of co and the Co/ao, ratios decrease as mineralization stage changes; the values of ao increase as the depth of ore-body increases; the values of Co and the C o/ao, ratios change rhythmically as the depth of ore-body increases. Results of cell parameters suggested that pyrites have high contents of Co, Ni and As, and have not undergone S depletion. Moreover, Al and Fe are the major replacement impurities in isomorphism of quartz. Gold-bearing pyrites are characterized by small ao , while gold-bearing quartz are characterized by big ao, small Co, and C o/ao ratio. The values of ao, of pyrite and the values of Co and Co/ao ratios of quartz are mostly larger than their ideal values. Therefore, denudation of the gold ore-body is slight, and potential value of this deposit is considerable.

This paper introduces the application of the pyrite thermoelectric property measurements in gold exploration of the Shihu gold deposit. Pyrite is the main gold-carrying mineral. Four gold mineralization stages may be distinguished. The thermoelectric type assemblage of pyrite is P<N⇒P≥N⇒P>N⇒P≤N from mineralization stages I to IV. In the mineralization area, from the top downward when (P and P% decrease, (N and N% increase, which in the main coincides with the results of mineralogical mapping by using the distribution of pyrite type (P%) and the mean of the thermoelectric coefficient (P. Some typomorphic information such as formation temperatures of pyrite, relative burial depths of orebodies, characteristics of orebodies and prospects of the deep part may be obtained according to thermoelectric properties of pyrite.