REMOTE SENSING RESEARCH ON NORTH PART OF THE YULONG COPPER DEPOSITS ZONE IN XIZANG (TIBET)

The zone of Yulong copper deposit is considered superlarge in scale all over the world, which is a part of Tethys to Himalaya Ore\|forming zone. The geological background of the Jinshajiang and Lancangjiang Faults provided utility for accumulated of copper, molybdenum and so on. The Yulong copper zone is the most important characteristic in the east Qinghai—Xizang Plateau (Tibet), which isabout 400km in length from north to south, and 30～70km in width from east to west. The structural channel for ores accumulation was constructed in Yanshan orogeny and the process of ore forming of the zone was mainly in Himalaya orogeny. The Yulong copper zone can be divided into three subzones, each named as north, south and east subzone which the north subzone is 50km in length of about NNW direction. Based on the geological interpretation (Fig.1), we understood that NW structures are distributed mainly in this area, then EW and NNW, and the sigmoid structures extended reflect their extrusion character. The EW and NNW structures are distributed in small scale and extended stable, which are cut to each other. The NNW structure was interpreted as undercover fracture, which may occurred earlier than NW one. Beside, of the structure, there are some differences in image tone, linear, relief, strata combination, structure pattern and so on. Therefore, the undercover fault played key efforts to Yulong copper formation.

Western Mining Plans to Further Invest RMB 449.5 million In Its Subsidiary Yulong Copper

Western Mining announced in the evening of December 13 that the company’s Board of Directors approved the Proposal for Further Investing in the Company’s Subsidiary Yulong Copper and agreed that the company,along with Yulong Copper’s shareholders Zijin Mining and Changdu Investment will make an additional investment in the same equity

Geochronology and Geochemistry of the Mamupu Cu-Au Polymetallic Deposit,Eastern Tibet:Implications for Eocene Cu Metallogenesis in the Yulong Porphyry Copper Belt

The Mamupu skarn-type Cu-Au polymetallic deposit represents the first discovery of a medium deposit in the southern Yulong porphyry copper belt(YPCB),eastern Tibet.The Cu-Au mineralization mainly occurs as chalcopyrite in breccia,within the plate-like carbonate interlayer,being closely related to chloritization(e.g.,chlorite,magnetite and epidote)and skarnization(e.g.,diopside,tremolite and garnet).The ore-related quartz syenite porphyry(QSP)and granodiorite porphyry(GP)were emplaced at 40.1±0.2 Ma and 39.9±0.3 Ma,respectively.The QSP of Mamupu is an alkaline-rich intrusion,relatively enriched in LREE,LILE,depleted in HFSE,with no significant negative Eu and Ce anomalies,slightly high(^(87)Sr/^(86)Sr)i,lowε_(Nd)(t),uniform(^(206)Pb/^(204)Pb)i andε_(Hf)(t)values,which indicates that the porphyry magma may be caused by both the mixing of metasomatized EM II enriched mantle and thickened juvenile lower crust.The QSP in the Mamupu deposit shares a similar genesis of petrology to other ore-related porphyries within the YPCB.High oxygen fugacity and water content of the magmas are essential for the formation of porphyry and skarn Cu deposits.The QSP has similar high magmatic oxidation states and water content to the Yulong deposit,which indicates that the Mamupu has a high prospecting potential.Differences in the geological characteristics and scale of mineralization between the Mamupu and other YPCB deposits may be due to the different emplacement depths of ore-related intrusions,as well as differences in the surrounding rocks.

SEDIMENTARY, MAGMATIC AND TECTONIC CONSTRAINTS ON THE FORMATION OF THE YULONG SUPPER0-LARGE PORPHYRY COPPER POLYMETAL DEPOSIT, EAST TIBET

The Yulong supper\|large copper deposit is situated within the well\|known S\|N striking Yulong copper\|molybdenum ore belt. The ore\|bearing biotite\|monogranitic porphyry was emplaced within clastic rocks (mainly shales and siltstones) of the Jiapila Formation (T 3 j ) and carbonate rocks of the Bolila Formation (T 3 b ) of the Upper Triassic. Five mineralization patterns have been recognized in the deposit, i.e., ①veinlet\|disseminated Cu\|Mo ore in the porphyry; ②skarn\|type Cu ore at the contact zone with carbonates (T 3 b ); ③stratiform\|like oxidized Cu ore between T 3 b carbonate rocks and T 3 j hornstones; ④brecciated Cu ore at the local periphery of porphyry; and ⑤vein Pb\|Zn\|Ag ore in the outer contact zone. They constitute a unique integrated polymetal mineralization series of epigenetic intermediate\|acid magmatic hydrothermal system.Studies have shown that the Yulong deposit was the coupling product of sedimentation, magmatism, and tectonism. The Cu\|bearing sandstones in the Japila Formation have provided partial ore\|bearing materials for the porphyry mineralization during the Himalayan period. The mineralized porphyry mass was passively emplaced and controlled by a nose\|like anticlinal trap opening to the north. The interlayered fractured zone formed during folding between the Jiapila and Bolila Formations acted as favorable host space for stratiform\|like skarn and oxidized ores. A large number of cleavages and fissures developed during folding provided both conduits for the circulation of ore\|forming fluids and host spaces for Pb\|Zn\|Ag ore veins. The veinlet\|disseminated Cu\|Mo ore in the porphyry mass owns the characteristics of typical porphyry copper deposits in the world. The veinlet\|disseminated ore body and the stratiform\|like skarn\|type and/or oxidized ore body, the two main ore bodies in Yulong, are connected with each other and shown as “mushroom\|like" shape, in which the former occurs as “mushroom stem" and the latter as “mushroom cover".

Texture and Geochemistry of Multi-stage Hydrothermal Scheelite in the Mamupu Cu-Au-Mo(-W)Deposit,Eastern Tibet:Implications for Tungsten Mineralization in the Yulong Belt

Multistage tungsten mineralization was recently discovered in the Mamupu copper-polymetallic deposit in the southern Yulong porphyry copper belt(YPCB),Tibet.This study reports the results of cathodoluminescence,trace element and Sr isotope analyses of Mamupu scheelite samples,undertaken in order to better constrain the mechanism of W mineralization and the sources of the ore-forming fluids.Three different types of scheelite are identified in the Mamupu deposit:scheelite A(Sch A)mainly occurs in breccias during the prograde stage,scheelite B(Sch B)forms in the chlorite-epidote alteration zone in the retrograde stage,while scheelite C(Sch C)occurs in distal quartz sulfide veins.The extremely high Mo content and negative Eu anomaly in Sch A represent high oxygen fugacity in the prograde stage.Compared with ore-related porphyries,Sch A has a similar REE pattern,but with higher ΣREE,more depleted HREE and slightly lower(^(87)Sr/^(86)Sr)i ratios.These features suggest that Sch A is genetically related to ore-related porphyries,but extensive interaction with carbonate surrounding rocks affects the final REE and Sr isotopic composition.Sch B shows dark(Sch B-I)and light(Sch B-II)domains under CL imaging.From Sch B-I to Sch B-II,LREEs are gradually depleted,with MREEs being gradually enriched.Sch C has the highest LREE/HREE ratio,which indicates that it inherited the geochemical characteristics of fluids after the precipitation of HREE-rich minerals,such as diopside and garnet,in the early prograde stage.The Mo content in Sch B and Sch C gradually decreased,indicating that the oxygen fugacity of the fluids changed from oxidative in the early stages to reductive in the later,the turbulent Eu anomaly in Sch B and Sch C indicating that the Eu anomaly in the Mamupu scheelite is not solely controlled by oxygen fugacity.The extensive interaction of magmatic-hydrothermal fluids and carbonate provides the necessary Ca^(2+)for the precipitation of scheelite in the Mamupu deposit.

GEOLOGICAL FEATURES AND FORMATIVE MECHANISM OF THE YULONG PORPHYRY COPPER BELT OF INTRACONTINENTAL REJUVENATED PLATFORM TYPE IN CHINA

Extending in a NNW-SSE direction. the Yulong porphyry copper belt is the largest and richest porphyry copper belt in China, originating in the Paleogene. Tectonically located on the eastern margin of the northern Tibet geodepression. and nearly 500 km of the Himalayan Yarlung Zangbo plate subduction zone of nearly E-W trend. it is a relatively typical intracontinental rejuvenated platform-type porphyry copper belt. Ore-bearing porphyry masses in the belt mainly represented by monzogranite-porphyry occurring as stocks in variegated sandshale of the lower Upper Triassic Jiapila Fromation and its overlying and underlying copper-bearing strata. They are characterized by enrichment in K. CI and LREE. abundant fluid inclusions and a distinct porphyroblastic texture. The oxygen. hydrogen. strotium. lead and sulfur isotopic values of the rock show the feature of crust-mantle mixing.The Orebodies are plpe-shaped stratoid; the mineralization is dominated by Cu and Mo, accompanied by Fe. Co. Au. Ag. Bi. W. Pb. Zn. and Pt-group elements. Alteration is strong. marked mainly by potassic alteration, silicification. skarnization and propylitization. The formation of this type of deposit largely progressed through two stages. The first stage was the stage of formation of Cu-bearing source beds. It occurred in the Triassic. when a transgressive copper-bearing formation was deposited on the western margin of the Qamdo Bay. which was represented by intermediate-acid volcanic rocks and variegated sandshale in the lower part. dolomitic carbonate rocks in the middle and black carbonaceous sandshale in the upper part. In the second stage. composite porphyry copper deposits were formed. This stage took place in the Paleogene. when this district was in a stage of platform rejuvenation. forming a series of NNW-trending deep faults. so that Na, K. Cl. H2O and CO2-rich hydrothermal fluids from the depths were injected into the upper crust and replaced and melted copper-bearing sialic rocks of the upper crust. e. g. the Triassic copper-bearing rock series in the Yulong area. to form porphyroblastic cooper-bearing intermediate-acid porphyry.

斑岩铜矿蚀变分带与成矿机制:玉龙矿床水-岩反应热力学平衡模拟例析

蚀变分带和成矿机制的准确厘定是建立斑岩成矿模型与找矿预测的关键。本文以新生代金沙江-哀牢山成矿带的玉龙斑岩铜矿为例,通过质量作用定律(LMA)和吉布斯自由能最小化模型(GEM),构建含矿热液与斑岩侵入体的pH-f O 2相图和动态传输模型,以揭示蚀变分带成因和金属成矿机制。LMA与GEM结果显示初始成矿流体pH值为4.7,logf_(O2)=-23.0(ΔFMQ=+2.7),且溶解Cu含量为1138×10^(-6),Mo为1.2×10^(-6)。研究表明,当该酸性及强氧化性流体流入二长花岗斑岩体时,在温度为450~360℃范围内,代表钾硅酸盐化蚀变的钾长石、黑云母、硬石膏、赤铁矿和磁铁矿的矿物逐渐沉淀,且与钾硅酸盐化蚀变相关流体具有较高pH值(5.0~7.0)和氧逸度(ΔFMQ=+2.9~+3.6)特征;当温度在360~320℃范围时,代表青磐岩化蚀变阶段的典型矿物如绿帘石、铁绿泥石和斜绿泥石等逐渐形成,流体pH值(5.0~6.4)和氧逸度(ΔFMQ=+1.1)均有所下降;当温度进一步从320℃下降到200℃时,流体pH值(5.0~5.7)进一步小幅下降,而氧逸度则(ΔFMQ=+1.7)略有回升,在此期间,绢云母和方解石等开始沉淀并形成典型的绢英岩化蚀变。此外,以HMoO_(4)^(-)和MoO_(4)^(2-)为载体的Mo在狭窄高温区间(450~370℃)内沉淀,而以CuCl(CuCl_(4)^(3-)、CuCl_(2)^(-)、CuCl)为主要载体的Cu则在在中、高温(450~300℃)范围中沉淀。通过利用LMA反演及GEM正演相结合定量化地刻画了玉龙斑岩铜矿水岩反应过程,由此揭示了斑岩矿床蚀变分带是逐渐冷却的单一岩浆热液与斑岩体不断反应的结果,且不同温度窗口对应着钾硅酸盐化(450~360℃)、青磐岩化(360~320℃)和绢英岩化(320~200℃)蚀变矿物的形成,故含矿流体温度的快速下降可能是玉龙铜矿蚀变叠加的重要因素。此外,Cu、Mo络合离子溶解度对温度变化的差异响应,导致了Mo矿化主要发育于靠近斑岩体的高温区域,而Cu则以网脉状-浸染状叠加到Mo矿化之上,并广泛分布于斑岩体周边的高-中温区域。

西藏玉龙斑岩铜矿床成矿斑岩起源及成矿意义

位于青藏高原东缘的玉龙超大型斑岩铜-钼矿床,是碰撞型斑岩铜矿的典型代表。根据现有研究发现,玉龙矿床的成矿斑岩和含矿斑岩的成矿潜力不同。为深入探讨该矿床的岩浆起源,并揭示控制其成矿潜力的内在因素,本文对玉龙矿区含矿的二长花岗斑岩和成矿的花岗斑岩进行了锆石U-Pb年代学、全岩主微量和Sr-Nd同位素对比研究。结果表明,花岗斑岩具有与二长花岗斑岩相近的结晶年龄(42~41 Ma),同时也具有相似的Sr-Nd同位素组成,其(^(87)Sr/^(86)Sr)_(i)分别为0.7060~0.7076和0.7062~0.7067、ε_(Nd)(t)分别为-2.9~-2.1和-4.6~-1.9,表明两者具有相同的岩浆起源。两期斑岩具有高K_(2)O含量(平均值大于4%),较低的MgO、Mg^(#)、Cr含量,显著的Nb、Ta负异常,较低的Nb/U和Ce/Pb值,重稀土元素相对轻稀土元素亏损,高Sr/Y值的地球化学特征,表明母岩浆起源于新生下地壳的部分熔融。锆石微量元素数据显示,两期斑岩均具有较高的Eu/Eu^(*)(>0.44)、10000×(Eu/Eu^(*))/Y(>3.6)、(Ce/Nd)/Y(>0.01)及较低的Dy/Yb值(<0.31,平均0.22),暗示两者均具有很高且相近的岩浆水含量;二长花岗斑岩ΔFMQ为0.29~2.29(平均为1.44),花岗斑岩ΔFMQ为1.07~2.74(平均为1.80),两者均具有较高的岩浆氧逸度,但花岗斑岩氧逸度具有更大的变化范围,且较二长花岗岩的更高,暗示氧逸度的差异导致了两者的成矿性差异。

玉龙铜矿深边部找矿前景及潜力分析

对玉龙铜矿深边部的探索揭示了其显著的铜资源潜力,预示着产量增加和地区经济活力提升的可能。技术创新和深层勘探的进步为玉龙铜业的发展和市场竞争力增强打开了新视角。然而,技术挑战、资金需求和环境保护标准也提出了不小的考验。这些发现为未来的勘探、开发策略提供建设性的见解,同时对投资者具有参考价值。

西藏玉龙铜矿斑岩型铜矿浮选药剂优化试验研究

玉龙铜矿斑岩型矿石含铜0.73%、钼0.044%,其中铜矿物主要为辉铜矿和黄铜矿,钼矿物主要为辉钼矿,脉石矿物主要为石英。现场采用“钼铜快浮选-铜强化浮选-合并精选”工艺,原药剂制度条件下闭路试验可以获得铜钼品位分别为22.67%和1.360%、铜钼回收率分别为85.07%和81.74%的精矿。为了进一步提高铜钼的回收率,在流程结构不变的情况下对斑岩矿石的药剂制度进行了优化研究。研究结果表明,钼铜快浮选采用BK404C和BK345作捕收剂可保障钼回收的同时,还能尽可能使铜得到回收;铜强化浮选采用BK404B和BK404C作捕收剂可强化在钼铜快浮选作业未能上浮的铜得到回收。优化后的药剂制度闭路试验可以获得铜钼品位分别为23.27%和1.340%、铜钼回收率分别为87.14%和82.24%的精矿,达到了提高铜钼回收率的目的。

基于ASTER的遥感蚀变信息提取——以西藏玉龙斑岩铜矿带为例

位于特提斯-喜马拉雅成矿带东部的西藏玉龙斑岩铜矿带,是全球瞩目的铜成矿远景区。尽管矿区的自然条件严峻,给传统的地表勘探工作带来了挑战,但其植被稀疏的特点却为遥感信息提取提供了便利。为此,本文以ASTER遥感影像为数据源,应用主成分分析法和成像光谱法提取玉龙斑岩铜矿带的蚀变矿化信息。其中,主成分分析法选用ASTER 1~4波段提取铁染蚀变异常信息,1、3、4、5波段提取碳酸盐化蚀变异常信息,1、3、4、8波段提取Mg羟基蚀变异常信息,1、3、6、7波段提取Al羟基蚀变异常信息;而成像光谱法则主要通过最小噪声分离(MNF)、纯净像元指数(PPI)、n维可视化(n-D Visualizer)和混合像元分解法(MTMF),绘制了玉龙斑岩铜矿带的蚀变矿物信息分布图。通过综合分析两种方法所得的结果,结合地层、构造等地质要素,构建了遥感找矿模型,并预测了4个成矿远景区。最后,通过与已知矿点的对比验证,确认了我们提取的矿化蚀变区域与实际矿点高度吻合,从而证明了这两种方法的有效性和可靠性。本研究不仅为玉龙斑岩铜矿带的大规模勘探提供了有力的技术支持,也为未来靶区的精确圈定奠定了坚实基础。

高海拔露天矿山智能配矿系统应用实践

西藏玉龙铜矿改扩建工程建成投产后生产规模不断扩大,随着市场竞争的不断加剧,为了提高选矿效率,降低生产成本。玉龙铜矿提出“精准配矿”管理理念。但矿山前期传统的采矿场—堆场—矿仓的配矿方法已逐渐落伍,为适应市场竞争,玉龙铜矿积极引进智慧矿山管控、精准配矿管理的生产模式,结合露天矿山特点,大胆尝试,建设矿山智能配矿系统,经过近半年的实践,在降低矿石入选品位波动,提高资源综合利用率、提升生产设备效率等方面,取得了瞩目的成绩,在降本增效的同时,也为高海拔露天矿山智能配矿应用积累经验,树立典型。

藏东玉龙铜矿带含矿斑岩及成岩系列

西藏东部新生代玉龙铜矿带含矿斑岩，包括玉龙、扎拉尕、莽总、多霞松多和马拉松多等，均为同期不同阶段侵人的地质体构成的复式岩体。岩石类型有石英二长斑岩、二长花岗斑岩、正长花岗斑岩和碱长花岗斑岩。岩石化学成分均富碱（Na2O+K2O＞8%）、高钾和K2O／Na2O比值远大于1等，属于碱性钾质系列，即钾玄岩系列。

西藏玉龙铜钼矿同位素年代学研究

西藏玉龙铜钼矿是三江地区玉龙成矿带上的超大型铜矿。随着矿区开采工作的启动,矿区外围的找矿工作也逐步展开。本文在矿区外围找矿项目中,采用高精度离子探针方法对矿区及外围的岩体进行了年代学测试,获得玉龙铜钼矿两件含矿黑云母二长花岗斑岩的成岩年龄分别为43.0±0.5Ma(MSWD=1.3)、43.8±0.7Ma(MSWD=2.6);矿区外围北部甘龙拉地区石英二长花岗斑岩成岩年龄为43.9±0.6Ma(MSWD=1.19),矿区外围南部的纳加扎地区黑云母二长花岗斑岩成岩年龄为41.4±0.6Ma(MSWD=1.6)。表明玉龙斑岩铜钼矿带岩体主要于中始新世沿碰撞产生的拉分盆地侵入、就位,并且具有由北向南逐渐演化的趋势。矿区北部地区具有一定的找矿潜力。结合三江地区其他矿床的年代学数据和动力学背景,认为以玉龙铜钼矿为中心往北及往南均存在较大的找矿潜力。

西藏斑岩铜矿的前景展望

世界斑岩铜矿主要产于中生代—新生代环太平洋带、古特提斯带和古生代中亚—蒙古带,因为上述3带为聚合板块集中分布地区。中国西藏集中了金沙江聚合带、雅鲁藏布江聚合带和怒江—班公错聚合带,为世界上聚合板块最发育地区之一,具有较长的大洋板块俯冲和陆—陆碰撞的造山历史,构造—花岗质岩浆十分发育,其中深源高侵位的花岗质斑岩分布广泛,对于形成斑岩铜矿和其他相关矿床十分有利,为找矿评价斑岩铜(金)矿很有前景的地区。笔者借鉴世界和中国评价斑岩铜矿的经验,同时收集了西藏近年来找寻评价斑岩铜矿有关的地质资料,对西藏斑岩铜矿的前景进行了展望。

西藏玉龙斑岩铜钼矿辉钼矿铼-锇同位素定年及其成矿学意义

玉龙铜钼矿床是金沙江—红河斑岩铜矿带北部的一个超大型铜钼矿,也是我国目前最大的几个铜矿之一。玉龙铜矿曾经作为我国新生代最典型的斑岩铜矿,在西南三江及冈底斯斑岩铜矿带的地质找矿工作中起到了典型示范作用;但与其成矿作用有关的科学问题还尚待进行深入研究,精确的成矿时代及其成矿演化历史就是其中主要课题之一。文章对采自矿区钻孔的5件辉钼矿样品进行铼-锇同位素定年,得到的等时线年龄为(41.6±1.4)Ma。5件样品的模式年龄表明,玉龙超大型铜钼矿床成矿作用的时间跨度约为1.5Ma,说明成矿作用是在较短时期内完成,反映了独特的成矿背景和成矿机制;成矿时代也表明玉龙铜钼矿形成于早喜马拉雅阶段变形变质造山高峰期与中喜马拉雅阶段变形变质造山高峰期之间,反映了独特的成矿背景和成矿机制。

钾玄岩系列:藏东玉龙铜矿带含矿斑岩元素地球化学特征

西藏东部玉龙铜矿带，包括玉龙、扎拉尕、莽总、多霞松多和马拉松多等斑岩型Ｃｕ，Ｍｏ，Ｐｂ，Ｚｎ，Ａｕ，Ａｇ和Ｐｔ等多金属矿床．由于分析技术条件的限制，前人所获得的含矿斑岩微量元素数据精度较低．采用先进的ＰＥＥｌａｎ６０００型电感耦合等离子质谱仪（ＩＣＰ－ＭＳ）分析微量元素（包括稀土元素），结果表明含矿斑岩和共生的钾质碱性深成岩、火山岩和煌斑岩在时空上具一致性，岩石化学成分均富碱（ｗ（Ｋ２Ｏ）＋ｗ（Ｎａ２Ｏ）＞８％），高钾和ｗ（Ｋ２Ｏ）／ｗ（Ｎａ２Ｏ）比值远大于１，微量元素富集Ｓｒ，Ｂａ等大离子亲石元素和轻稀土元素等，均显示出钾玄岩系列岩石的特征。

西藏玉龙上三叠统甲丕拉组沉积特征及铜矿质的初步富集

西藏玉龙铜矿带以班岩铜矿带闻名于世，而对成矿带中最具工业价值的似层状氧化矿体的研究较少。在“国家计委′９５重大项目专题研究”的最新基础资料和研究成果基础上，我们首次提出了西藏东部上三叠统甲丕拉组的“沉积矿质初步富集”，并以玉龙铜矿床似层状矿体的解剖阐述它与玉龙铜矿带的关系。

藏东玉龙斑岩铜矿床多期流体演化与成矿的流体包裹体证据

通过对王龙斑岩铜矿石英斑晶、辉钼矿石英脉中流体包裹体岩相学、包裹体显微测温分析、包裹体成分的激光拉曼探针分析及包裹体中子矿物的扫描电镜/能谱分析,发现矿化斑岩石英斑晶中发育多期流体包裹体。斑晶中除流体包裹体外尚可见少量熔体包裹体,与斑岩期矿化有关的成矿流体以中高温(200～537℃)、高盐度(29.6～44.7 wt%NaCleq)为特征,与粘土化蚀变有关的流体包裹体以低温、富 Ca 为特征,不同气相充填度的气液两相包裹体与高盐度含子矿物多相包裹体共存,且具有相似的均一温度,显示不混溶流体包裹体特征。温度、压力降低引起的流体不混溶是造成斑岩型矿化矿质沉淀的主要因素,斑岩期流体与浅成低温热液期流体形成于统一的流体系统,为同源演化结果。

西藏玉龙成矿带斑岩Cu-Mo矿床地质地球化学特征及成矿机制探讨——玉龙和多霞松多对比研究

玉龙斑岩铜矿带位于特提斯-喜马拉雅构造域东缘三江构造带的中部,是研究碰撞后喜山期富碱斑岩成岩成矿作用响应的最佳地区。本文选择玉龙和多霞松多两个矿床,分析了两地含矿斑岩的成岩成矿年龄及岩石地球化学特征,并结合Sr-Nd-Pb、S-H-O同位素进一步探讨了与冈底斯含矿斑岩岩浆源区组成、构造控矿模式及深部动力学机制上的差异。赋矿岩体均具有富碱、高K、高Al等钾质碱性岩系列特征,玉龙早期为石英二长斑岩,晚期为花岗闪长斑岩和石英二长斑岩,多霞松多早期为二长花岗斑岩和花岗闪长斑岩,晚期为碱长花岗斑岩,两者明显富集轻稀土和大离子亲石元素Rb、Th、U、Pb,相对亏损高场强元素Nb、Ta、Yb,无明显Eu、Ce负异常。略高于原始地幔现代值的^(87)Sr/^(86)Sr值、较低的ε_(Nd)(t)、相对均一的^(206)Pb/^(204)Pb值,指示斑岩岩浆可能源自接近于EMⅡ型富集地幔交代成因的石榴石角闪岩和/或角闪榴辉岩的部分熔融,并发生低程度结晶分异,在上升侵位途中受到地壳物质的混染,其形成于古近纪中始新世喜马拉雅期的37~41 Ma左右,可能受控于印度板块与欧亚板块碰撞诱发的红河-哀牢山走滑断裂系统,尤其是妥坝-芒康断裂(TBF)左行走滑产生的局部俯冲作用。