The Kiloton Class Jiaojia Gold Deposit in Eastern Shandong Province and Its Genesis

The recent deep prospecting results in the Jiaojia area of Eastern Shandong Province indicate that the Jiaojia ore field composed of several individual gold deposits as previously suggested is actually an ultra-large gold deposit.This deposit covers an area of ～40 km2,and shows a structural control by the Jiaojia fault and its secondary faults.Gold orebodies generally occur along the same mineralization-alteration belt,and the main orebodies intersect with each other or exhibit a parallel or overlapping distribution.This deposit＇s reserves are estimated to be 1,200t of gold,being the first gold deposit of more than 1000t gold reserves in China.The No.Ⅰ-1 orebody in the Shaling-deep Sizhuang ore blocks holds gold reserves greater than 350 t,or 29 percent of the total reserves,followed by the No.Ⅰ orebody in Matang-Jiaojia ore blocks with exceeding 150t gold reserves.This deposit mainly occurs in the footwall of the Jiaojia fault,and presents zoned patterns in mineralization,alteration and structures.The strongly mineralized zones agree with strongly altered and tectonically fractured zones.These orebodies display strataform-like,veinlike or lenticular shapes,and generally show characteristics of pinching out and reappearing,branching and converging,expanding and shrinking.The orebodies commonly occur along positions where the fault strike changes and in gentle locations with dips changing from steep to gentle.The main orebodies are parallel to the main plane of the orecontrolling fault,and tend to be gentle from the surface to the deep.The orebodies mainly plunge to the southwest,with plunge angle of 45°-606° Orebodies near the main plane of the ore-controlling fault have more gold resource than those away from main fault zone.The slant depth of orebodies is generally larger than the length along its strike direction; orebodies become thick and gold grades become low from the shallow area to the deep area.Ore-forming fluids are H2O-CO2-NaCl±CH4 type with medium-temperature and moderate to low salinity.Sulfur isotopic values （δ34SCDT） for gold ores range between 11.08‰ and 12.58‰,indicating mixed sulfur sources; hydrogen isotopic values （δDVSMOW） range from-83.68‰ to-116.95‰ and oxygen isotopic values （δ18OV-SMOW） range between 12.04‰ and 16.28‰.The hydrogen and oxygen isotopes suggest that ore-forming fluids originated from primary magma,and mixing with a large amount of atmospheric water during the late stage.The Eastern Shandong Province gold deposits are associated with magmatic activities which have mantle crust-mixed source,and also share some similarities with orgenic and epithermal hydrothermal golddeposits.Because Eastern Shandong Province gold deposits with unique metailogenic features and formation setting which are different from other gold deposit types in the world,we call it the Jiaojiatype gold deposits.The kiloton class Jiaojia gold deposit is related to fluid activities,extension and detachment resulted from thermal upweiling of magmas.The strong magmatic activities in the middle to late stage of early Cretaceous in Eastern Shandong Province lead to active fluids,and provided abundant ore-forming materials for gold depsoits.Moreover,many extensional structures resulting from crustal extension provided favourable space for orebody positioning.

U-Pb Zircon Age, Geochemical, and Sr-Nd-Pb Isotopic Constraints on the Age and Origin of Mafic Dykes from Eastern Shandong Province, Eastern China

U-Pb zircon age, geochemical, and Sr-Nd-Pb isotopic data of mafic dykes from eastern Shandong Province, eastern China is reported herein. Laser ablation inductively coupled plasma mass spectrometry （LA-ICP-MS） U-Pb zircon analyses of two samples from the investigated mafic dykes yield consistent ages ranging from 121.9 Ma ± 0.47 Ma to 122.9 Ma ± 0.61 Ma. The mafic dykes are characterized by high （87Sr/86Sr） i ranging from 0.7087 to 0.7089, low εNd（t） values ranging from -16.9 to -17.8, 206Pb/204Pb = 17.15 to 17.17, 207Pb/204Pb = 15.45 to 15.47, and 208Pb/204Pb = 37.59 to 37.68. Results from the current study suggest that the mafic dykes are derived from partial melting of ancient lithospheric mantle that was variably hybridized by melts derived from foundered lower crustal eclogite. The mafic dykes may have been generated through subsequent insignificant crystal fractionation and very minor crustal contamination during magma ascent. Combined with previous studies, the current findings provide new evidence that the intense lithospheric thinning beneath the eastern Shandong Province of eastern China occurred at ~120 Ma, and that this condition was caused by the removal of the lower lithosphere （mantle and lower crust）.

The Sm-Nd Geochronology of the High Pressure Basic Granulite in Laixi, Eastern Shandong

A high pressure basic granulite ultramafic rock belt, which is about 200km long and trends toward NE, occurs in the late Archaean orthogneiss in Laixi Laiyang Qixia area, eastern Shangdong. This belt is located east to the Su Lu UHPM terrane and west to the Archaean rocks of the North China craton, therefore, its geological situation and implication for collision between the North China plate and the Yangtze plate is very important. The analyzed sample of high pressure basic granulite has decreasing pressure metamorphic texture. The mineral assemblage of retrograde metamorphism is of granulite facies. The sample yields an internal mineral whole rock Sm Nd isochron age of 1725Ma. The T(DM) age of whole rock is 2788Ma. These data are very similar to those of high pressure basic granulites in Northern China craton. Considering the petrological and geochemical characteristics and isotopic ages, the high pressure granulite ultramafic rock belt in eastern Shandong is suggested to belong to the North China craton and to be of the early Precambrian lower crust. Their lifting from the lower crustal level is related to collision between the North China plate and the Yangtze plate.

Dinosaur diversity during the transition between the middle and late parts of the Late Cretaceous in eastern Shandong Province,China:Evidence from dinosaur eggshells

The record of dinosaur eggs from the Upper Cretaceous Wangshi Group in eastern Shandong Province,China shows that the dinosaur species represented by elongatoolithids were present from the middle to the late Late Cretaceous,whereas those represented by the dictyoolithids and spheroolithids became extinct in the middle Late Cretaceous and the new species represented by ovaloolithids appeared in the late Late Cretaceous.Estimated eggshell conductance of water vapor is over 4 to over 115 times higher in spheroolithids and the dictyoolithids than in elongatoolithids and ovaloolithids,indicating that eggs of the first two oofamilies required higher humidity during incubation.Based on the18O record as preserved in eggshell,a change from relatively humid to relatively dry climatic conditions can be assumed to have taken place during the transition between the middle and late parts of the Late Cretaceous.It is reasonable to suggest that the change in climate was the cause of the dinosaur diversity.

K-Ar Geochronology of Mesozoic Mafic Dikes in Shandong Province, Eastern China: Implications for Crustal Extension

Based on K-Ar isotope analyses, Mesozoic mafic (and alkali ultramafic) dikes from western and eastern Shandong Province, China, are dated at 88.2±1.70 Ma to 169.5±3.7 Ma with the majority of ages ranging from 90 Ma to 140 Ma. The emplacement of the dikes suggests a major Yanshanian (Cretaceous) crustal extension in Shandong province. Together with other available age data, this study suggests four periods of crustal extension at about 80 Ma, 100 Ma, 120 Ma and 140 Ma, respectively. Besides the effect of collapse of the Yanshanian orogenic belt on the emplacement of the mafic dikes in Shandong in the Cretaceous, the mantle plume and the extensive left-lateral advection and extension of the Tanlu fault also have controlled the crustal extension and the emplacement of the mafic dikes in eastern Shandong and western Shandong, respectively.

胶东盘子涧金矿床成矿流体特征--来自包裹体、H-O同位素证据

盘子涧金矿床地处华北板块胶辽隆起区,栖霞—蓬莱金成矿带上。金矿的形成主要与区内控矿断裂——盘子涧断裂和中生代岩浆岩有关。为研究该矿床成矿流体性质及演化,并控讨矿床成因,对该矿床不同阶段的包裹体进行岩相学、显微测温、包裹体激光拉曼及H—O同位素分析研究。盘子涧金矿床成矿热液期可划分为4个成矿阶段,从早到晚分别是黄铁矿—石英阶段(Ⅰ阶段)、石英—黄铁矿(绢云母)阶段(Ⅱ阶段)、金—石英—多金属硫化物阶段(Ⅲ阶段)和石英—碳酸盐阶段(Ⅳ阶段)。其中Ⅱ、III阶段为主成矿阶段。不同成矿阶段的流体包裹体有3种类型,分别是富液气液两相盐水包裹体、含CO_(2)三相包裹体和纯液相包裹体。显微测温结果显示,成矿流体的完全均一温度介于142~348℃,主要集中于200~300℃,盐度介于4.44%~10.98%NaCl_(eqv)。石英的δD_(V-SMOW)值为-74.6‰~-68.5‰,δ^(18)O_(V-SMOW)值为+11.65‰~+13.92‰。显示成矿流体为中低温、低盐度的CO_(2)—H_(2)O—NaCl体系,来源于地幔,以岩浆热液为主,并伴有部分大气降水加入。矿床成因类型属石英脉型金矿。

Genesis and Geological and Geochemical Characteristics of Qixia Gold Deposit, Shandong, China

The Qixia gold deposit is one of the important quartz vein-type deposits hosted inmetamorphic rocks in the east of Shandong, China. Compositionally the wolframite which isassociated with gold mineralization in the deposit is rich in iron, but poor in manganese, showing that this mineral crystallized from hydrothermal solution at low temperature. The temperatures at the main metallogenic stage of the Qixia gold deposit are Within the range of 160 -270t. The gaseous phases in fluid inclusions are dominated by H2O and CO2, while Na+,Ca2+ and Cl- are the major species in the fluid phase with K+ and F- present in relativelysmall amounts. The salinities of fluids are 4. 2 wt% - 8. 0 wt% NaCl equiv. Meanwhile, thefluid is characterized by either Ca2+ > Na+ > K+ (in five samples) or Na+ > Ca2 + > K+ (in twosamples), quite similar to the composition of ore-forming fluid derived from meteoric water.Primary data on the hydrogen and oxygen isotopic compositions of the ore-forming fluid fallwithin a wide range: δ%H2o = - 56‰-95‰ and δ18OH2O=- 3.6‰-4. 5‰ relative toSMOW. These isotopic values fully reflect the distribution features of meteoric water which hasexchanged with the metamorphic rocks of the Jiaodong Group at different temperatures and W/R ratios, and the metallogenic process is characterized by low W/R ratios. The Rb-Sr isochronage of the Qixia gold deposit is 125. 8 ± 1. 7 Ma, with (87Sr/86Sr) being 0. 7168, and the timeinterval between the gold deposit and its country rocks (granite or metamoprhic rocks) is verylarge. The formation Of the Qiaxia gold deposit is directly related to the evolution of geologicalhistory in eastern Shandong, and a genetic model in which the deep convective circulating meteoric water reacts with the country rocks can be used to explain the metallogenic mechanism ofthe deposit.

张渤断裂带山东东部地热水地球化学特征分析

通过对张渤断裂带山东东部地区温泉/地热井采样,测试水样主量元素和氢氧同位素,进行水文地球化学特征分析,结果表明:(1)地热水化学类型主要有Ca-HCO_(3)、Na-Cl、Na-HCO_(3)、Na-SO_(4)。(2)δD、δ^(18)O的测值范围分别为-39.90‰~-68.00‰和-5.00‰~-8.50‰,均落在中国大气降水线和中国东部地区大气降水线下方附近,说明地热水来源为大气降水。计算得到研究区地热水最小循环深度为1183 m,最大循环深度为4271 m,补给高程大致变化范围为430.0~1366.6 m。(3)γNa/γCl变化范围在0.509~38.37,其中临朐揽翠湖、磁山温泉变质系数相对较高,表明受矿物溶滤作用较大。(4)Na-K-Mg三角图表明地热水样大多为部分平衡水,仅有高青县御泉汤温泉为平衡水。

胶西北金矿控矿断裂深部特征及对找矿的启示——来自地球物理探测的证据

[研究目的]胶东是全球著名的金成矿区,金矿床主要受断裂构造控制,该区尚有很多断裂是无矿的,以往对断裂的深部形态及赋矿断裂与无矿断裂的区别特征缺乏深入研究。[研究方法]本文通过在胶东西北部实施重、磁、电长剖面和穿越主要金矿集区的广域电磁剖面、反射地震剖面,揭示了断裂深部特征,为赋矿断裂和无矿断裂的识别提供了重要证据。[研究结果]地球物理探测表明,胶西北地区的断裂构造有陡倾角的深断裂、缓倾角的铲式断裂和陡倾角的小断裂,其中控矿的三山岛、焦家和招平断裂均是铲式断裂。结合对金矿床的研究发现,矿床主要赋存于缓倾角断裂中,矿体呈阶梯分布特征,陡倾角的深断裂中未见明显的金矿化蚀变,现今金矿床赋存的最大深度在5 km左右。[结论]综合分析认为,低角度拆离断层和连续性不好的高角度小断层有较好的物理圈闭条件,有利于矿化富集;而产状平直、陡倾的深断裂不具备物理圈闭的条件,不利于成矿。胶东型金矿的找矿方向应集中于缓倾角的铲式断裂及其派生、伴生的陡倾角小断裂附近。

不同控释复合肥对鲁东小麦生长、氮素吸收与利用的影响

为筛选出适宜鲁东冬小麦的控释复合肥,以小麦品种“济麦22”为材料,采用随机区组大田试验,设4个处理,分别为施用控失型控释复合肥(CRF1),多肽螯合型控释复合肥(CRF2),硝基双效型控释复合肥(CRF3),脲甲醛控释复合肥(CRF4)和4个分别与4种控释复合肥等养分量的单质肥料复配复合肥处理(CCF1、CCF2、CCF3、CCF4)。按照N为240 kg/hm^(2),用尿素、过磷酸钙和氯化钾按控释复合肥中的养分含量配制对应的普通复合肥,其中控释复合肥处理的肥料全部基施,单质肥料复配复合肥的氮素按1:1的比例在播种前和拔节期施用,磷钾肥一次性基施,研究其对鲁东冬小麦的分蘖数、成熟期干物质积累量、产量和氮肥利用率的影响。结果表明:与各自的对照相比,CRF1和CRF4处理的小麦干物质积累量的增幅分别为4.87%和3.52%,差异达到显著水平;其它两种控释复合肥的小麦干物质积累量虽有增加但与各自的对照相比较,差异未达到显著水平。CRF4处理的小麦单株分蘖成穗数、分蘖成穗率均为最高,分别为5.00%和59.35%,有利于小麦高产群体构建;控释复合肥处理的土壤有效氮供应在小麦全生育期内比较均衡,可以满足小麦全生育期对氮素的需求,且CRF1处理和CRF4处理的效果更优;与对照相比,CRF1处理和CRF4处理的小麦氮素利用率和氮素吸收效率增幅显著高于其它两种控释复合肥处理,更有利于促进小麦对氮素的吸收利用。与对照相比,控释复合肥可显著增加小麦产量,提高氮素利用率,其中CRF1处理和CRF4处理更适用于鲁东冬小麦的栽培。综上,控失型控释复合肥和脲甲醛控释复合肥更适宜鲁东冬小麦高产高效的需求,具有较大的增产潜力。

胶东沿海地区山村民居建构特征及气候适应性实证探究

挖掘传统民居生态价值,不仅是保护和传承中国乡村建筑文化的重要举措,也是促进乡村可持续发展的动力源泉。文章以胶东沿海地区某山村民居为研究对象,梳理山村地形气候、村落布局、建造历史及建构特征等,并进一步对现存的3类典型农宅进行热环境实测,记录空气温度、相对湿度、黑球温度和CO_(2)浓度等参数,研究不同建构方式对建筑热湿环境的影响作用。结果表明:传统围护结构与多种气候缓冲措施相结合使传统农宅具有最佳的室内热环境和热舒适水平。说明传统建构方式具有良好的气候适应性,传统智慧与现代技术的有机结合有助于乡村农宅改造更新的进一步优化。

基于环境行为心理学的鲁东沿海旅游乡村评价

针对我国大部分乡村旅游的游客稀少、后续环境管理维护差及同质性严重等多重问题,基于在环境行为心理学的基础,结合鲁东沿海地区文化元素,采用层次分析法从环境感知、心理感知和行为感知三个方面构建鲁东沿海旅游乡村POE评价指标体系,从17个指标层对山东省五个省级以上沿海旅游示范村进行评价。评价结果揭示了各村在环境感知要素、心理感知要素和行为感知要素三个方面的优势及不足。对于不足之处提出,提升沿海乡村综合环境、关注游客心理感受和注重沿海乡村资源整合等优化策略。

地幔流体参与胶东金矿成矿作用的氢氧碳硫同位素证据

胶东地区金矿床可以分为三种类型,即石英脉型、破碎蚀变岩型和胶(州)—莱(阳)盆地北缘拆离带中的角砾岩型。挑选玲珑、焦家、三山岛、仓上、望儿山、大尹格庄、邓格庄、蓬家夼、发云夼和大庄子10个矿床中成矿主期的黄铁矿、绢云母和钾长石进行了硫、氢、氧同位素测试,还对个别矿床成矿晚期的碳酸盐矿物进行了碳、氧同位素测定,同时对比测定了玲珑花岗岩和郭家岭花岗闪长岩中黑云母和钾长石的氢、氧同位素,结果表明这些金矿虽然产出形式有差别,但都是同一深部流体库中流体上涌、与围岩发生强烈水岩反应和与地壳流体混合,通过交代和沉淀成矿。胶东金矿在形成时代上晚于侏罗纪玲珑花岗岩(160～150Ma)和白垩纪郭家岭花岗闪长岩(130～126Ma),与煌斑岩墙及其他中基性岩墙同时生成(121～114Ma),两者具有富CO2流体和伴随着以钾交代为特征的蚀变作用,都是中生代岩石圈快速减薄过程的地壳浅部响应。

华北克拉通胶东地区粉子山群碎屑锆石SHRIMP U-Pb定年

胶东是华北克拉通重要的变质基底出露区之一。对该区古元古代粉子山群和荆山群中碎屑锆石的年龄分布特征的研究,可以为胶东地区早前寒武纪演化提供重要依据。由于Pb丢失作用,前人仅在粉子山群中获得少量锆石谐和年龄。本文对粉子山群长石石英片岩中碎屑锆石进行了SHRIMP定年。52颗锆石的61个数据点分析,获得36个谐和年龄（不谐和度〈10%）。所有具谐和年龄的锆石都具有高的Th/U比值,大多显示明显的岩浆环带,原为岩浆成因。谐和锆石年龄分布在2033～3429Ma之间,主要峰值分别为～2.19Ga和～2.48Ga。该样品中还含有2颗年龄大于3.3Ga的锆石,位于谐和线上的2颗最年轻碎屑锆石的年龄为～2.08Ga。结合前人研究,可得出如下结论：1）粉子山群和荆山群原岩沉积时代可进一步限制在1.9～2.1Ga之间;2）粉子山群与荆山群的碎屑锆石年龄分布形式存在明显区别,指示其源区可能不同;3）胶东地区可能存在古太古代地壳物质。

含柯石英锆石的SHRIMP U-Pb定年:胶东印支期超高压变质作用的证据

苏鲁超高压变质带的形成时代究竟是印支期还是新元古代争议始终很大。对山东胶南地区超高压变质带中超镁铁岩和榴辉岩的锆石激光拉曼、阴极发光和离子探针原位定年的研究获得超高压变质作用发生的时代为印支期。其中超镁铁岩含柯石英锆石的年龄为221±12Ma,该深成岩侵位时代为新元古代(581±44Ma)。此外,锆石中另有约400Ma年龄记录,可能代表岩石形成后另有一期热事件。榴辉岩的下交点年龄为228±29 Ma,与超镁铁岩含柯石英锆石年龄一致,代表超高压变质时代;上交点为中元古代(1821±19Ma),代表原岩年龄,后者与其片麻岩围岩时代相一致,说明榴辉岩是原位俯冲。

华北克拉通古元古代晚期地壳演化和荆山群形成时代制约--胶东地区变质中-基性侵入岩锆石SHRIMP U-Pb定年

胶东地区的荆山群呈近东西向环绕太古宙TTG花岗质片麻岩展布,主要由成熟度高的含石墨变泥砂质岩石、钙硅酸岩和大理岩组成,变质程度达高角闪岩相-麻粒岩相,具孔兹岩系性质。变质中-基性岩侵入到荆山群。它们的侵位时代对于探讨华北克拉通东部元古宙构造演化以及对荆山群沉积时代的制约,都有重要意义。锆石SHRIMP U-Pb定年结果表明,遭受低级变质的闪长岩(S0835)岩浆锆石年龄为1852±9Ma(MSWD=2.1),遭受中高级变质的辉长岩(S0816)变质锆石年龄为1865±11Ma(MSWD=0.76)。结合区域资料,可得出如下结论:(1)荆山群孔兹岩系形成于古元古代晚期(2.2～1.9Ga);(2)古元古代期间,胶东地区从挤压体制转入伸展体制的时间在1.87Ga之前。在华北克拉通中西部的恒山、大青山地区,存在1.97～1.92Ga辉长岩,在1.92～1.83Ga期间发生变质,与本文研究结果类似。这表明华北克拉通中-西部和东部具有类似的古元古代演化历史。

山东诸城晚白垩世恐龙化石埋藏学研究

山东诸城是中国以晚白垩世大型鸭嘴龙类为主的恐龙化石产地。本文从化石埋藏地地质背景、埋藏沉积相与古水流、骨骼化石分布、改造与聚集特征及分类学、骨骼化石微观组构和埋藏模型等方面，系统阐述了诸城晚白垩世恐龙骨骼化石埋藏学特征。诸城晚白垩世晚期（火山岩长石Ar-Ar年龄为76．2～73．5Ma）恐龙化石主要集群埋藏于冲积扇泥石流（DF）、洪泛平原（FP）与辫状河道（BRC）沉积层中，化石密集、成层分布，但残体骨骼层内骨骼化石大小、形状混杂、疏密不均、属种的单-以及残体骨骼大小、形状和规模不等，多数骨骼化石为不完整的长柱状、板状形态，骨骼呈定向排列，具有短距离搬运、异地快速埋藏及集群埋藏特点。沉积物及薄片分析显示，诸城恐龙生存及骨骼化石埋藏的环境为半干旱-干旱气候条件。埋藏-保存模式可概括为：恶劣的生存环境-恐龙批量死亡-遗体腐烂-骨骼被洪流或泥石流冲刷、搬运至目前沉积场所-快速掩埋-浅埋藏成岩-地壳抬升暴露。诸城恐龙化石埋藏学的研究，为我们了解和恢复中国华北地区晚白垩世时期的古地理、古环境和古气候提供了依据。

胶东牟平-乳山金矿带金青顶金矿碲化物矿物的特征及沉淀机制

通过光学显微镜、电子显微镜并结合能谱分析,在金青顶金矿Ⅱ号矿脉深部除含碲化物碲银矿、碲金银矿和碲铋矿外,首次发现碲金矿的存在,进一步证实了前人对于该矿床中存在碲金矿这一新矿物的推测,也打破了该金矿深部无碲金银矿的传统认识。这些碲化物呈连生体或者细脉状产于黄铁矿等硫化物、石英与黄铁矿裂隙中。在金银碲化物矿物中,Te含量变化较小,Au含量变化较大,与Ag呈负相关,与Bi为正相关。结合金-银-碲矿物成分-共生图解,对金银碲化物矿物的共生组合特征进行了研究。研究表明,Te总是优先与Ag结合形成碲银矿或碲金银矿,只有热液中Ag被消耗后才与Au结合形成碲金矿,最后Te被耗尽,矿液中残留很多的Au,从而形成自然金,说明随着成矿过程的演化,成矿热液可能逐渐富金,具体表现为碲银矿-碲金银矿-碲金矿-自然金的析出顺序。

鲁东胶莱盆地青山组火山岩的^(40)Ar-^(39)Ar定年——以五莲分岭山火山机构为例

以五莲分岭山火山机构为例 ,运用高精度的4 0 Ar- 39Ar定年技术 ,对胶莱盆地青山组火山岩的形成年龄进行了精确测定。结果表明 ,青山组第一旋回中偏碱性富钾火山岩的形成年龄为10 9.9± 0 .6Ma ,第二旋回酸性流纹质火山岩形成年龄为 10 8.2± 0 .6Ma ,据此确定胶莱盆地青山组火山岩应为早白垩世岩浆活动的产物。根据该组火山岩在空间上具有自西向东年龄渐新的演变趋势 。

胶东金青顶和大尹格庄金矿床花岗质围岩的蚀变地球化学研究

研究了大尹格庄金矿床和金青顶金矿床的花岗质围岩及其蚀变岩的主元素、微量元素和氧同位素等特征。结果表明郭家店花岗岩和金青顶花岗岩Nb、Ta、P、Ti相对亏损 ,εNd(t)值为 - 11.9～ - 14.5 ,为前寒武纪地壳岩石熔融的产物。大尹格庄围岩蚀变较强 ,主要为沿断裂带发育的绢英岩化及深部的钾长石化 ,金青顶蚀变较弱。在绢英岩化和绢云母化蚀变过程中 ,两矿床Na2 O和REE降低 ,Au、Ag升高 ,金青顶变化幅度相对较小。热液带入的组分均为Au、Ag、As、Co、Cu、K2 O等 ,在大尹格庄带入组分还包括Pb、Zn、Fe、SiO2 。似伟晶状钾长石化均使两矿区K2 O显著升高 ,Au和Ag略有升高 ,其余组分降低 ,尤其轻稀土降低显著。引起大尹格庄矿床围岩发生绢英岩化和似伟晶状钾长石化的初始流体δ18O值下限分别为 3.3‰和 4.4‰ ,以岩浆热液占主导 ;引起金青顶矿床围岩发生似伟晶状钾长石化和绢云母化的初始流体的δ18O值下限分别为 2 .1‰和 1.2‰ ,也以岩浆热液为主 ,但不排除有大气降水参与。