Jiande copper deposit in Zhejiang Province was found in the 1960, and it is located in the northeastern part of Qinzhou-Hangzhou suture belt between Yangtze and Cathaysia blocks. Research about ore-forming fluids on it is still lacking. This study made a systematic investigation of fluid inclusions in the Jiande copper deposit. Based on petrographic observations of ore-bearing quartz collected from the massive ores, there are three types of primary inclusions of Jiande deposit:two-phase liquid-rich (type Ⅰ), two-phase vapor-rich (type Ⅱ), and halite-bearing (type Ⅲ) fluid inclusions. Type Ⅰ inclusions occur widely in the Jiande deposit and show homogenization temperatures of 220~377℃ and salinities of 0.63~8.00 wt.%NaCl equivalent. Type Ⅱ and type Ⅲ inclusions primarily coexist in ore veins. Homogenization temperatures of type Ⅱ and type Ⅲ reveal peak temperatures at 296~334℃and 290~326℃, respectively, and their salinities at 1.22~2.00 wt.%NaCl and 31.87~38.16 wt.%NaCl, respectively. The results indicate that fluid boiling process took place, and metal precipitation was probably induced by extensive fluid boiling events during the ore stage. Raman analysis of fluid inclusions indicates that, in the gaseous phase, water is dominant with small amount of CO2, CH4, and N2. Our study suggests that the Jiangde copper deposit is a Yanshanian Skarn deposit rather than a Hycernian Sedex Cu deposit.

The Pangushan tungsten deposit is an important large-size quartz-vein type W-polymetallic deposit in southern Jiangxi Province.Based on detailed petrographic observations and using the means of Fluid Inclusion Assemblage (FIA),the authors carried out microthermometric and Raman microspectroscopic studies of fluid inclusions in early bismuthinite-wolframite-quartz veins and late (bismuthinite)-wolframite-quartz veins of the main ore-forming stage of the Pangushan tungsten deposit.The fluid inclusions are mainly of H2O-NaCl type and H2O-NaCl-CO2 type together with minor pure CO2 type.The existence of abundant CO2-rich inclusions is a typical feature of the Pangushan Tungsten deposit.Experimental results show that the main homogenization temperature range of the two-phase H2O-NaCl type fluid inclusions is comparable to that of the H2O-NaCl-CO2 type inclusions,while the salinity of the two-phase H2O-NaCl type is higher than that of the H2O-NaCl-CO2 type.In addition,the H2O-NaCl type fluid inclusions show evident decrease in homogenization temperature from the early veins to the late veins at constant salinity.Moreover,less H2O-NaCl-CO2 type inclusions occur in the (bismuthinite)-wolframite-quartz veins while relatively abundant CO2 type inclusions are existent.Raman microspectroscopic studies of various types of inclusions show that,besides water and CO2,the fluid inclusions also contain small amounts of CH4 and N2.The characteristics of fluid inclusions in the Pangushan Tungsten deposit indicate that the fluid immiscibility caused by CO2 escaping possibly led to tungsten precipitation.

在网络计划的编制中,找关键节点,简化了计算过程.

本文运用波浪状镶嵌构造观点,对“汾渭地堑”的形成机制与演化过程进行了分析,认为其形成和发展都受环太平洋和地中海这两大地壳波浪系统周期性的交替活动所控制。它是一个在两个波系不同的交替期中分步骡形成和发展起来的“复合地堑”。两大地壳波浪系统的这种交替活动至今仍控制着“地堑”内的地震活动性。