山东蓬莱地区侯格庄金矿床流体包裹体特征

侯格庄金矿床位于胶东栖(霞)-蓬(莱)金成矿带大柳行金矿田东南部。该文采用包裹体显微测温方法对金矿石中石英矿物内残留的流体包裹体进行研究,总结了金矿石石英矿物中的流体包裹体特征,并对该矿床成矿流体来源、矿床成因进行了研究。研究表明,该矿床石英矿物中流体包裹体以纯液包裹体为主,次为H_2O-CO_2气液两相包裹体及H_2O-CO_2三相包裹体,未见含子矿物包裹体。均一温度在109~396℃,盐度在2.9~22.44wt%NaCl,密度在0.64~1.06g/cm~3之间,估算成矿压力为128~340MPa,成矿深度约4.4~11.6km。该矿床至少经历了2个矿化期次,成矿流体为中低温、低盐度、低密度流体,流体来源于天水与岩浆水的混合产物,属中低温、中浅成热液矿床。     

山东莱芜胡家庄地区稀土矿流体包裹体特征及成矿条件

胡家庄稀土矿床位于莱芜弧形断裂弧顶的北侧,该文重点研究稀土矿床石英矿物中的流体包裹体特征。研究表明,流体包裹体以气液两相H2O包裹体为主,均一温度主要集中119.1～233.2℃。盐度变化范围大致分布在8.1～22.4 wt%,平均16.2%,成矿流体盐度为中低盐度流体;密度变化于0.9～1.1 g/cm3,平均1.02 g/cm3;成矿压力范围在30～95 MPa,平均62.5 MPa,推断矿床成矿压力环境为中低压环境,矿床成矿深度范围为2.5～3.5 km。     

青海驼路沟钴矿床流体包裹体及成矿物理化学条件

应用均一法、激光拉曼显微探针法研究驼路沟钴矿床的流体包裹体,发现其包裹体类型多样,以气液两相包裹体和富二氧化碳包裹体为主,测得均一温度为220℃~300℃,众值为275℃,成矿流体形成于中低温环境。通过对其他热力学参数计算,确定出驼路沟钴矿床成矿流体具有中低盐度、低密度、弱还原-还原性的特点。包裹体气、液相成分分析表明其与现代海底热液沉积物的流体成分类似,进一步佐证了驼路沟钴矿床为热水喷流沉积成因。     

新疆彩霞山铅锌矿床流体包裹体研究

应用均一法、激光拉曼显微探针法研究彩霞山铅锌矿床的流体包裹体,发现其类型主要有单相盐水溶液包裹体、气液两相盐水溶液包裹体两类,测得均一温度为180℃~310℃,最佳成矿温度为190℃~220℃,属中低温矿床,代表矿区主要的成矿阶段。测得包裹体的冰点温度为-23.2℃~-0.8℃,盐度为1.4%~23.18%。气液两相包裹体中液相成分以水为主,气相成分以二氧化碳为主,单液相包裹体中成分为w(H2O)>w(CO2)。再据分馏方程计算得到热液水δ(18OH2O)为7~8。结果表明,矿床的形成与岩浆活动有关,矿床成因应划归于与中酸性侵入岩浆活动有关的中低温热液脉状矿床。     

胶东马家窑金矿床流体包裹体及S同位素特征研究

马家窑金矿位于胶东栖蓬福金成矿带盘马金矿田东部,本文针对该矿床主要成矿阶段典型矿石开展了流体包裹体及S同位素分析测试。研究表明,矿石中流体包裹体以纯液包裹体与富液体包裹体为主,局部发育富气体包裹体和H2OCO2三相包裹体,可见少量含子矿物富液体包裹体。包裹体均一温度集中于220～280℃,石英流体包裹体盐度（w（NaCl））集中于4.60%～8.60%,白云石流体包裹体盐度（w（NaCl））集中于5.14%～5.33%,流体密度集中于0.80～1.02g/cm3,估算成矿压力为200～285MPa,成矿深度约6.8～9.7km。矿石中黄铁矿δ34S值总体为5.3‰～15.9‰。成矿流体为中温、低密度、低盐度流体,具壳幔混合来源特征,矿床属中温中成热液矿床。     

吉林珲春农坪金铜矿床流体包裹体特征与矿床成因

为确定农坪金铜矿床的成矿流体特征及矿床形成机制,采集细脉浸染状金铜矿石中的石英-硫化物细脉,对石英颗粒中的流体包裹体进行了岩相学、显微测温和激光拉曼光谱分析。结果表明：脉石英中主要发育Ⅰ型气液两相、Ⅱ型含CO2三相、Ⅲ型含子矿物多相、Ⅳ型纯气相和Ⅴ型纯液相等5种类型的原生流体包裹体。不同类型包裹体的均一温度变化范围为237.8℃～399.4℃,主要集中于310℃～370℃,盐度w （ NaCl ）变化范围于1.39％～12.3％和33.32％～42.03％两个区间。代表性包裹体的激光拉曼光谱分析结果显示,成矿流体主要气相成分为H2 O、 CO2,并含有少量的CH4。综合研究后认为,农坪矿床成矿流体曾发生过沸腾作用,以至流体中的H2 O、 CO2等挥发组分大量逸出,引起金、铜等有用组分的沉淀富集。农坪金铜矿床与小西南岔金铜矿床在成矿条件及矿化特征等方面具有相似性,二者同为斑岩型金铜矿床,均属燕山晚期构造岩浆作用的产物。     

胶东栖霞山城金矿流体包裹体特征及其成矿意义

胶东栖霞山城金矿是产于太古宙基底变质岩系中的富含铜、铅、锌等有益组分的石英脉型金矿床,通过对成矿流体包裹体的研究表明：山城金矿包裹体多成群分布,形态规则,其类型以富液体包裹体为主,少部分为H₂O-CO₂三相包裹体。流体包裹体的均一温度主要分布在150～240℃之间,与钾交代关系密切的早期成矿温度为290～310℃,多金属硫化物石英脉成矿温度在130～290℃区间,代表了成矿期的温度区间,成矿温度较钾交代的温度明显偏低。盐度为0.35%～13.5%,主要集中在3.5%～7%之间,属低中盐度,但多金属硫化物石英脉具有更宽泛的盐度区间。压力介于272～438MPa,平均为337.1MPa,不同矿化类型成矿流体压力值也存在明显差异,早期的钾交代型矿石的成矿流体压力相对较高,多金属硫化物石英脉型矿石流体压力相对较低。山城金矿成矿流体具有早期相对高温、高压、高盐度的流体,晚期成矿流体的温度、压力和盐度值都相对较低,说明成矿流体是连续演化的过程。     

气液包裹体及其在岩金矿床勘查中的应用

本文较详细地介绍了气液包裹体的一般特点以及从中可获得的基本参数——热液的温度(均一温度、爆裂温度、形成温度)、压力、浓度和成分;着重强调了其在岩金矿床勘查中的应用,即通过气液包裹体的研究资料,进行地热梯度的判别,成脉热液成分分析等,进而了解成矿地质特征,认识成矿地质、物理、化学环境,圈定已知矿床的远景地段及寻找盲矿体。     

胶东蓬莱——栖霞金矿带侯格庄金矿流体包裹体特征及其地质意义

侯格庄金矿位于胶东蓬莱栖霞金矿带的虎路线金矿田内,是矿田内典型的石英脉型金矿,矿体主要呈脉状与透镜状分布于中生代郭家岭花岗岩内部的断裂体系中。本文结合野外与岩相学观察、包裹体测温与拉曼光谱分析,将侯格庄金矿的热液阶段划分为黄铁矿石英阶段（Ⅰ）、金石英黄铁矿阶段（Ⅱ）、金多金属硫化物阶段（Ⅲ）和石英碳酸盐阶段（Ⅳ）。将其流体包裹体划分为单相包裹体（Ⅰ型）、气液两相包裹体（Ⅱ型）、含CO2三相包裹体（Ⅲ型）,其中单相包裹体又分为纯液相包裹体（Ⅰa型）和纯气相包裹体（Ⅰb型）。侯格庄金矿流体包裹体的均一温度为141~332℃,集中在211~252℃,盐度为2.74%~8.81% NaCl eqv,集中在3.58%~4.51% NaCl eqv。成矿流体为中—低盐度和中—低温CO2H2ONaCl流体。结合蓬莱金矿带HO同位素研究,金矿初始和成矿期流体主要为岩浆流体,随着成矿作用的进行,有大气降水的混入,成矿流体为岩浆水与大气水的混合流体。     

内蒙古金厂沟梁金矿床成矿流体特征及稳定同位素研究

对金厂沟梁金矿床含金石英脉中流体包裹体进行了岩相学、显微测温、单个包裹体的激光拉曼测试以及O和S同位素组成等方面研究。结果表明,成矿流体气相成分主要为H2 O,属H2 O-NaCl体系,包裹体均一温度为148.7℃～352℃,盐度[ w （ NaCl ）/％]为1.05％～5.99％。δ18 O值为-1.1‰～3.0‰,说明成矿流体继承了变质流体的特征,仍以岩浆水和后期大气降水为主;δ34 SV-CDT组成为0.6‰～4.3‰,平均值0.817‰,极差为3.1‰,表明成矿流体中的硫主要来自于幔源,其次为围岩。综合分析认为,金厂沟梁金矿床是在燕山晚期太平洋板块俯冲导致岩石圈的快速减薄、拆沉的拉张环境下形成的浅成造山型金矿。     

Geochemistry of fluid inclusions from Linglong gold deposit in Shandong，China

By means of microscopy and laser Raman spectroscopy,the authors studied the fluid inclusions in petrography.The results show that there exist three-phase CO2 -bearing and two-phase aqueous inclusions in gold ore;the fluid of NaCl-H2O--CO2 system went through immiscibility in ore-forming process.Ore-forming fluids were of low salinity(0.82%-5.40%NaCleqv),low density(0.54-0.93 g/cm3);mineralization tempera-ture were concentrated in 320℃--340℃,with ore-forming pressure in 62-126 MPa and mineralization depth in 6.34-9.35 km.The fluid inclusions in quartz are generally characterized by a small amount of CO2 and N2.Combined with recent results of the isotopic analysis for fluid inclusions and dating data,it was indicated that the main ore-forming fluids derived mainly from source of mantle-derived fluids with a small amount of magmatic fluid and meteoric water.The genetic type was mesothermal gold deposits involved by mantle-derived fluids.     

山东胶东地区盘子涧金矿成矿流体He-Ar同位素地球化学特征

盘子涧金矿地处山东胶东地区蓬莱—栖霞金成矿带南部,是典型的石英脉型金矿,Au品位高,目前对该矿床成矿流体来源的研究尚不深入。在详细的矿相学观察及黄铁矿显微结构研究基础上,对盘子涧金矿主成矿阶段(石英-黄铁矿(绢云母)阶段和金-石英-多金属硫化物阶段)的载金黄铁矿进行了流体包裹体He-Ar同位素组成分析。结果表明:盘子涧金矿载金黄铁矿中流体包裹体的3He丰度为(3.49~8.50)×10^-14 cm^3 STP·g^-1,4He丰度为(2.46~5.06)×10^-8 cm^3 STP·g^-1,3He/4He值为0.8 Ra^1.2 Ra(Ra为大气3He/4He值,Ra=1.39×10^-6),成矿流体表现出以富集地幔为主导的壳幔混合特征;40Ar丰度为(1.02~2.65)×10^-7 cm^3 STP·g^-1,40Ar/36Ar值为896.3~1724.1,是大气饱和水40Ar/36Ar值的2~3倍,与中国东北部幔源岩样品40Ar/36Ar值相近,推测成矿流体主要来源于富集地幔,成矿流体中存在着一定量的地壳放射性成因40Ar,表明地壳流体参与了成矿作用。综上所述,推断山东胶东地区盘子涧金矿成矿流体为以富集地幔流体为主导的壳幔混合流体。     

Characteristics and sources of ore-forming fluids of South Narimalahei copper polymetallic deposit in East Kunlun,Qinghai

The South Narimalahei area is located on the north side of the Middle Kunlun fault in the eastern section of the East Kunlun composite orogenic belt. The ore body is veined and controlled by structures and se-condary fissures, which occurs in the structural alteration fracture zone in the Late Triassic granodiorite. In this deposit, copper mineralization is closely related to silicification and sericification. The formation process of the deposit includes hydrothermal mineralization and supergene oxidation. In this paper, the fluid inclusion minera-logy, microscopic temperature measurement and stable isotope studies have been carried out for ore of the main mineralization stage. The results show that the primary gas-liquid two-phase inclusions and a small amount of single-liquid inclusions are mainly developed in the quartz in the main mineralization stage. The results of microscopic temperature measurement show that the ore-forming fluid which has low temperature(151.7℃--205.8℃), low salinity(2.06 wt%--4.94 wt%NaCl), low density(0.86--0.92 g/cm~3) and shallow formation(1.5--3.0 km) is a hydrothermal solution of NaCl-H_2O system. Hydrogen and oxygen isotope results show that the ore-forming fluids mainly come from atmospheric precipitation, with a small amount of magmatic fluids participating. It is preliminarily determined that the South Narimalahei copper polymetallic deposit is a low-temperature hydrothermal vein deposit.     

湖北大冶铜山口斑岩-矽卡岩型铜钼矿床包裹体特征及流体演化意义

为了提供矽卡岩岩浆成因证据,丰富多成因矽卡岩理论,并研究湖北大冶铜山口铜钼矿床成矿流体性质,以包裹体的岩相学观察为基础,结合高温流体包裹体显微测温和激光拉曼光谱分析,对铜山口矿床矽卡岩矿化进行了研究。结果表明:在早期矽卡岩矿物石榴石中发现了丰富的晶质和非晶质熔融包裹体、熔体-流体包裹体,表明天然岩浆珠滴被矽卡岩矿物晶格缺陷捕获,其中含有石榴石、黄铜矿等子矿物,且早期流体包裹体均一温度超过500℃,为早期矽卡岩岩浆熔体成因提供了重要证据。矽卡岩成矿早期以岩浆作用为主,晚期以热液作用为主,且熔-流转换的过程主要发生在干矽卡岩阶段,早期岩浆熔体中富含成矿物质,为矿区深部成矿提供了物质基础。      

广西灌阳县古怪冲锡矿床石英包裹体研究

本文仅对广西灌阳县古怪冲锡矿床的岩石、矿石中的石英流体包裹体特征研究,探索了成岩、成矿的物理化学条件。认为成矿流体源于花岗岩浆,含锡云英岩是残余岩浆期的产物,伟晶岩与含锡石英脉具岩浆期后热液属性。根据石英包裹体的各种数据,可确定成矿物质来源,划分成岩、成矿阶段,以及矿床形成的物理化学条件。     

新疆阿尔泰铁矿成矿流体及成矿过程

以新疆阿尔泰铁矿为研究对象,综述铁矿成矿背景,划分成因类型和成矿时期,对典型矿床地质特征进行描述,研究成矿流体的温度和盐度以及成矿流体来源,最后探讨构造演化与铁矿成矿作用。结果表明:铁矿成因类型可划分为火山岩型、矽卡岩型、伟晶岩型、与花岗岩有关的热液型、与基性岩体有关的钒钛磁铁矿型和砂矿型;矽卡岩矿床流体包裹体从矽卡岩阶段到退化蚀变阶段再到石英-硫化物-碳酸盐阶段的均一温度(从200℃～500℃到200℃～350℃,再到160℃～300℃)以及流体盐度(NaCleq)峰值(从4.5%～21.5%到3.5%～20.5%,再到1.5%～17.5%)逐渐降低;托莫尔特铁(锰)矿沉积期成矿流体以中低温(集中在160℃～300℃)、低盐度(主要集中在4%～9%和14%～20%)为特征;两棵树伟晶岩型铁矿成矿流体为中温(173℃～290℃)、低盐度(0.35%～16.05%);氢和氧同位素特征表明,火山沉积型铁矿沉积期成矿流体是海水与岩浆水的混合,矽卡岩阶段成矿流体主要为岩浆水,石英-硫化物-碳酸盐阶段成矿流体主要为大气降水,混合少量岩浆水,同时两棵树伟晶岩型铁矿成矿流体主要来源于岩浆水和大气降水的混合;碳和氧同位素表明,矽卡岩型铁矿成矿流体中碳主要来自深部岩浆,少量来自海相碳酸盐岩。     

Fluid Inclusion Feature of Gold-Bearing Quartz Veins from the Jinniushan Gold Deposit, Shandong, China

The auriferous veins at Jinniushan occurs within the Jinniushan faulted zone in the Kunyushan Granite. Optical observation reveals that gold ore body formed during the main stage of hydrothermal activity. Detailed geothermometric studies of fluid inclusions from the veins show that the forming temperature ranges between 130℃ and 370℃ and the salinity is from 4.01 to 15.21 wvt percent NaCl. The ore-forming fluid is featured by low to moderate salinity, and low to moderate temperature. According to investigations of the values of vapor/liquid and temperatures of the ore-forming fluids, we propose that the boiling fluid inclusions exist in the main mineralization stages. Fluid boiling is suggested as a mechanism for the precipitation of gold from the hydrothermal fluid in the Jinniushan gold deposit.     

甘肃贾公台金矿床地质特征与流体包裹体研究

贾公台金矿床是秦祁昆造山系南祁连党河南山地区最具代表性的金矿床之一。为了查明其矿床成因类型,对贾公台金矿床进行矿床地质特征的系统性研究和成矿主阶段流体包裹体的测温及激光拉曼测试分析。结果表明:矿床位于NW向与NE向构造的交汇部位,矿化产于下奥陶统上岩组浅变质海相碎屑岩和花岗岩中,严格受NW向断裂控制;矿体主要呈脉状、透镜状,Au品位较高(1.98×10-6),有害组分少,且伴生Ag;成矿主阶段流体包裹体类型为气液两相包裹体及少量气体包裹体;成矿流体为低盐度、低CO2含量的NaCl-H2O体系,成矿温度为236℃~245℃(中温),成矿压力为48.7~51.4MPa,对应深度为5.56~5.72km;经与浅成热液型金矿、造山型金矿主要特征进行对比,初步厘定贾公台金矿床为浅成热液型金矿床。     

Relationship between CO2-bearing fluid and gold mineralization in Haigou gold deposit of Jilin

Haigou gold deposit is a typical orogenic gold deposit. There are a reasonable amount of fluid inclusions in the gold deposit,including three types: CO2-H2O-Na Cl inclusions,pure CO2 inclusions and Na Cl-H2 O inclusions,of which most of them are CO2-bearing inclusions. The fluid salinity is 1. 43%- 9. 08%,mainly concentrated in the range of 4. 69%- 5. 41%,the density of CO2 is 0. 69- 0. 80 g / cm3,indicating that the mineralization fluid is low-medium salinity and low density fluid. A series of studies on gold-bearing quartz vein and fluid inclusions show that there exists a positive correlation between the degree of the gold mi-neralization and the amount of CO2 in the inclusions,which means the more CO2-bearing inclusions there are,the higher the content of gold is. CO2 is mainly derived from mantle fluid,and the ore-forming fluid should be derived from mantle fluid and the crust shallow fluid. The conclusions have important denotative meaning on the metallogenic mechanism of orogenic gold deposit and the deep prospecting on metal deposit.     

Methane-rich fluid inclusions and their hosting volcanic reservoir rocks of the Songliao Basin, NE China

Methane-rich fluids were recognized to be hosted in the reservoir volcanic rocks as primary inclusions.Samples were collected from core-drillings of volcanic gas reservoirs with reversed δ12C of alkane in the Xujiaweizi depression of the Songliao Basin. The volcanic rocks are rhyolite dominant being enriched in the more incompatible elements like Cs, Rb, Ba, Th, U and Th with relative high LREE, depleted HREE and negative anomalies of Ti and Nb,suggesting a melt involving both in mantle source and crustal assimilation. Primary fluids hosted in the volcanic rocks should have the same provenance with the magma. The authors concluded that the enclosed CH4 in the volcanics are mantle/magma-derived alkane and the reversed δ13C of alkane in the corresponding gas reservoirs is partly resulted from mixture between biogenic and abiogenic gases.