Geology of Ore Deposits最新文献

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U–Pb Ages and Whole-Rock and Zircon Geochemistry of Granitoids from the Zhireken Mo-Porphyry Deposit, Eastern Transbaikalia: New Insights into the Link to Mineralization 外贝加尔地区东部日尔肯斑岩矿床花岗岩的 U-Pb 年龄和全岩及锆石地球化学：矿化联系的新见解

IF 0.7 4区地球科学 Q3 Earth and Planetary Sciences

Geology of Ore Deposits

Pub Date : 2024-04-17 DOI: 10.1134/s1075701524010069

T. V. Svetlitskaya, P. A. Nevolko

Abstract

The Zhireken Mo-porphyry deposit is located within the West Stanovoi terrane of the Transbaikalia sector of the Mongol–Okhotsk orogenic belt and is linked to the Middle–Late Jurassic Zhireken composite intrusion. Despite the long-term history of exploration of the deposit, many issues regarding magmatism and ore mineralization remain undetermined. In particular, the ore-producing granitoid intrusion that is genetically related to the deposit formation has not yet been identified. The study provides new U–Pb LA-ICP-MS zircon ages and geochemical whole-rock and zircon compositions obtained for igneous rocks of the Zhireken deposit. The research shows that the deposit is spatially associated with a series of high-K calc-alkaline to shoshonitic I-type granitoid intrusions that were emplaced at around 158–166 Ma at the postcollision stage of the evolution of the Mongol–Okhotsk Ocean. The sequence of the intrusive events includes biotite leucogranite (U–Pb age of ca. 164–166 Ma) → biotite–amphibole granite and granodiorite (U–Pb age of ca. 161–163 Ma) → dikes of granite-porphyry (U–Pb age of ca. 162–163 Ma), leucogranite-porphyry, and (quartz) diorite-porphyry → dikes of quartz monzonite-porphyry (U–Pb age of ca. 158 Ma). The U–Pb dates obtained and the observed geological relationships between granitoids and ore mineralization suggest that the emplacement of an ore-causative granite intrusion and the formation of porphyry-Mo stockwork system at the Zhireken deposit occurred in the interval of a. 158–161 Ma. A thorough examination employing geochemical whole-rock and mineral (zircon) fertility indicators reveals no genetic link between the studied granitoids and porphyry mineralization since they are all generated from weakly oxidized magmas. The ore-causative granitoid intrusion genetically related to Mo mineralization at the Zhireken deposit is either buried or represented by a rock type that is out of focus in both the present and previous studies.

摘要Zhireken斑岩钼矿床位于蒙古-奥霍次克造山带外贝加尔地区的西斯坦诺维地层中，与中-晚侏罗世Zhireken复合侵入体有关。尽管对该矿床进行了长期勘探，但有关岩浆和矿石成矿的许多问题仍未确定。特别是，与矿床形成有遗传关系的产矿花岗岩侵入体尚未确定。该研究提供了新的 U-Pb LA-ICP-MS 锆石年龄，以及对日尔肯矿床火成岩获得的全岩地球化学成分和锆石成分。研究结果表明，该矿床在空间上与一系列高K钙碱性至闪长岩I型花岗岩侵入体有关，这些侵入体形成于蒙古-奥霍次克洋演化的碰撞后阶段，时间约为158-166Ma。侵入事件的顺序包括生物橄榄岩白云母（U-Pb 年龄约为 164-166 Ma）→生物橄榄岩闪长花岗岩和花岗闪长岩（U-Pb 年龄约为 161-163 Ma）→花岗斑岩（U-Pb 年龄约为 162-163 Ma）、白云母斑岩和（石英）闪长岩斑岩→石英单斜斑岩斑岩（U-Pb 年龄约为 158 Ma）。获得的铀-铅年代以及观察到的花岗岩和矿化之间的地质关系表明，Zhireken 矿床的成矿花岗岩侵入体的形成和斑岩-钼储层系统的形成发生在 158-161 Ma 之间。利用地球化学全岩和矿物（锆石）肥度指标进行的全面研究表明，所研究的花岗岩与斑岩矿化之间没有遗传联系，因为它们都是由弱氧化岩浆生成的。与日尔肯矿床钼矿化有遗传关系的致矿花岗岩侵入体要么被掩埋，要么代表了一种在目前和以前的研究中都不被关注的岩石类型。

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引用次数: 0

Age and Relationship between Magmatites of a Pluton and Small Intrusions (Sorskoe Porphyry Cu–Mo Deposit, Khakassia) 基岩岩浆岩与小型侵入体的年龄和关系（卡卡西亚，索尔斯科耶斑岩铜-钼矿床）

IF 0.7 4区地球科学 Q3 Earth and Planetary Sciences

Geology of Ore Deposits

Pub Date : 2024-04-17 DOI: 10.1134/s1075701524010021

A. N. Berzina, A. P. Berzina, V. O. Gimon

Abstract

The Sorskoe (Sorsk, Sora) porphyry Cu–Mo deposit is located in the Kuznetsk Alatau, in the northwest of the Altai-Sayan folded region. Commercial Cu–Mo mineralization is closely associated with small porphyry intrusions (stocks, dikes) localized in the Uibat pluton. The magmatites of the pluton and small intrusions are composed of rocks of the gabbroid, monzonitoid, and granite/leucogranite associations. The rock associations of the pluton and small porphyry intrusions are similar in mineral composition, type of metallogenic specialization, petrogeochemical and isotopiс characteristics. The gabbroic and monzonitic rocks were probably generated by fractionation of the mafic magma and assimilation of lower crustal material. The geochemical characteristics indicate the absence of a genetic relationship between basic/intermediate rocks and the granite/leucogranite association. The rocks of the granite/leucogranite association were probably derived from the silicic magma generated by partial melting of the juvenile lower mafic crust due to the heat released from the mafic magma. U-Pb geochronological data indicate a time gap between the completion of pluton formation (∼478 Ma) and emplacement of small porphyry intrusions (from ∼467 to ∼457 Ma). Age differences between pluton and small intrusions suggest they are not coeval and were probably sourced from independent upper-middle crust magma chambers, which were formed by ascending melts derived from a deep large long-lived magma reservoir. The rocks of the Uibat pluton represent the remnant of the earlier solidified and eroded magma chamber. Periodic episodes of magma supply from a late shallow magma chamber resulted in the formation of small porphyry intrusions. Together these observations suggest that the magmatites of the pluton and small intrusions are not comagmatic. Their magmas may have been derived from a common deep-seated source, but possibly evolved independently, that is, they do not represent a single magma lineage, as often noted for porphyry Cu–Mo deposits. Changing tectonic environment before the emplacement of small intrusions triggered porphyry magma ascent, fluid saturation and exsolution and provided favorable conditions for large-scale mineralization.

摘要 Sorskoe（Sorsk，索拉）斑岩铜-钼矿床位于阿尔泰-萨彦褶皱区西北部的库兹涅茨克阿拉套。商业性铜-钼矿化与乌伊巴特岩浆岩中的小型斑岩侵入体（岩浆、岩尖）密切相关。柱状岩浆岩和小型侵入体由辉长岩、单斜辉长岩和花岗岩/白云岩等岩石组成。柱状岩和小型斑岩侵入体的岩石组合在矿物成分、成矿特化类型、岩石地球化学和同位素特征方面都很相似。辉长岩和黑云母岩可能是由黑云母岩浆分馏和下地壳物质同化生成的。地球化学特征表明，基性岩/中间岩与花岗岩/白云岩联合体之间不存在遗传关系。花岗岩/白花岗岩群的岩石很可能是由硅质岩浆产生的，由于黑云母岩浆释放出的热量，幼年的下黑云母地壳部分熔化产生了硅质岩浆。铀-铅地质年代数据表明，在柱状构造形成完成（∼478Ma）与小型斑岩侵入体形成（从∼467Ma到∼457Ma）之间存在时间差。深成岩和小型侵入体之间的年龄差异表明它们不是共生的，很可能来自独立的中上地壳岩浆室，这些岩浆室是由来自深部大型长寿命岩浆库的上升熔体形成的。乌伊巴特岩柱的岩石是早期凝固和侵蚀岩浆室的残余物。后期浅层岩浆室的周期性岩浆供应导致了小型斑岩侵入体的形成。这些观察结果表明，柱状岩和小型侵入体的岩浆岩并非复合岩浆岩。它们的岩浆可能来自一个共同的深部来源，但也可能是独立演化的，也就是说，它们并不像斑岩型铜-钼矿床通常所指出的那样，代表单一的岩浆系。在小型侵入体形成之前，构造环境的变化引发了斑岩岩浆上升、流体饱和和溶解，为大规模成矿提供了有利条件。

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引用次数: 0

Porphyry Copper and Epithermal Gold–Silver Mineralization of the Baimka Ore Zone, Western Chukotka, Russia 俄罗斯西楚科奇拜姆卡矿区斑岩型铜矿和热液型金银矿化带

IF 0.7 4区地球科学 Q3 Earth and Planetary Sciences

Geology of Ore Deposits

Pub Date : 2024-04-17 DOI: 10.1134/s1075701524010033

A. F. Chitalin, I. A. Baksheev, Yu. N. Nikolaev

Abstract

The results of modern studies of the Baimka Ore Zone (BOZ) in Western Chukotka obtained during prospecting and exploration in 2008–2016 are summarized, and the main features of its structure and development are shown. The porphyry–epithermal ore systems of the BOZ were formed within the NW-trending regional-scale dextral strike-slip fault in the Early Cretaceous time. Meridional extensional structures and diagonal strike-slip faults in the strike-strip fault zone controlled the position and morphology of intrusive bodies of monzonites and paragenetically related with them ore stockworks with porphyry copper and gold–silver epithermal mineralization. Ore stockworks were traced to 700-m depth by drilling, and, accordingly to the geophysical data, mineralization is forecasting deeper. The zoning of soil anomalies and the primary geochemical zoning of the Peschanka deposit and the Nakhodka ore field are described. An erosion levels of deposits are different. For the Peschanka deposit, an upper-middle erosion level has been established. For the deposits of the Nakhodka Ore Field, the erosion grade changes from the upper to the lower level. New prospects have been identified within the BOZ, where economical porphyry copper and gold–silver epithermal mineralization is predicted.

摘要总结了2008-2016年对西楚科奇白姆卡矿区（Baimka Ore Zone，BOZ）进行探矿和勘探的现代研究成果，并展示了其结构和发展的主要特征。白姆卡矿区的斑岩热液矿石系统形成于早白垩世时期的西北向区域尺度右旋走向滑动断层内。走向条带断裂带中的经向延伸构造和斜向走向滑动断层控制了单斜岩侵入体的位置和形态，并在成因上形成了斑岩型铜金银热液矿床。根据地球物理数据，预计矿化将更深。文中描述了土壤异常分区以及 Peschanka 矿床和 Nakhodka 矿田的原生地球化学分区。矿床的侵蚀程度不同。Peschanka 矿床的侵蚀程度为中上水平。对于纳霍德卡矿田的矿藏，侵蚀等级从上层变为下层。在边界区内发现了新的远景，预计在这些远景中存在经济的斑岩铜和金银热液矿化。

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引用次数: 0

Apatite Geochemistry As a Fertility Tool for Porphyry Systems (Using the Example of the Shakhtama Mo-Porphyry and Bystrinsky Cu–Au–Fe-Porphyry–Skarn Deposits, Eastern Transbaikalia, Russia) 磷灰石地球化学作为斑岩系统的肥力工具（以俄罗斯外贝加尔地区东部的 Shakhtama Mo 斑岩和 Bystrinsky 铜-金-铁-斑岩-矽卡岩矿床为例）

IF 0.7 4区地球科学 Q3 Earth and Planetary Sciences

Geology of Ore Deposits

Pub Date : 2024-04-17 DOI: 10.1134/s1075701524010070

V. S. Vesnin, P. A. Nevolko, T. V. Svetlitskaya, P. A. Fominykh, D. V. Bondarchuk

Abstract

The Bystrinsky Cu–Au–Fe porphyry–skarn and Shakhtama Mo-porphyry deposits are located in Eastern Transbaikalia, Russia. The host rocks in the deposits are multiphase granitoid plutons of the Middle–Late Jurassic Shakhtama complex. Economical mineralization is genetically related to small bodies of granite porphyries and granodiorite porphyries of late phases. To identify the specifics of fertile magmatic rocks, the composition of volatile components and rare-earth elements in apatite from fertile and barren intrusions was studied. Special attention was paid to the proof of the primary magmatic origin of apatite and the absence of influence of metasomatic alteration processes on their composition. It was shown that fertile intrusions at the Bystrinsky and Shakhtama deposits are characterized by an increased SO₃ content in apatite, which indicates their formation from oxidized melts. In addition, it is shown that the presence of sulfate sulfur in the melt is a necessary for the sulfide ore formation. It has been established that a high Cl content (>0.8 wt %) in fertile magmatic rocks, which ensures the transfer of chalcophilic elements, is a characteristic difference between apatites from Cu-porphyry and Mo-porphyry systems. The content of volatile apatite can be used as a sign of fertility for porphyry systems. An analysis of the trace element composition of apatite made it possible to establish that apatites from fertile granitoids of the Shakhtama and Bystrinsky deposits are characterized by Eu/Eu* > 0.4, which indicates the oxidation and high water saturation of the parental melts. The revealed characteristics of apatite from fertile intrusions and their discreteness from barren granitoids can serve as a sign of fertility of igneous rocks for porphyry mineralization.

摘要 Bystrinsky 铜-金-铁斑岩-矽卡岩矿床和 Shakhtama 镍-斑岩矿床位于俄罗斯东外贝加尔地区。矿床的母岩是中-晚侏罗世 Shakhtama 复合体的多相花岗岩柱岩。有经济价值的矿化与晚期花岗斑岩和花岗闪长岩斑岩的小型岩体有关。为了确定肥沃岩浆岩的具体特征，研究了肥沃和贫瘠侵入体磷灰石中挥发性成分和稀土元素的组成。研究特别关注磷灰石原生岩浆起源的证明，以及其成分没有受到变质蚀变过程的影响。研究表明，Bystrinsky 和 Shakhtama 矿床的肥沃侵入体的特点是磷灰石中的 SO3 含量增加，这表明它们是由氧化熔体形成的。此外，研究还表明，熔体中硫酸盐硫的存在是硫化矿形成的必要条件。已经证实，肥沃岩浆岩中的高 Cl 含量（0.8 wt %）可确保嗜铝元素的转移，这是来自铜斑岩系统和钼斑岩系统的磷灰石之间的一个特征性差异。挥发性磷灰石的含量可以作为斑岩系统肥沃程度的标志。对磷灰石微量元素成分的分析表明，来自 Shakhtama 和 Bystrinsky 矿床肥沃花岗岩的磷灰石的特征是 Eu/Eu* > 0.4，这表明母体熔体的氧化和高水饱和度。所揭示的肥沃侵入体磷灰石的特征及其与贫瘠花岗岩的差异可以作为斑岩矿化火成岩肥沃程度的标志。

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引用次数: 0

Porphyry Deposits of Northern Eurasia: Practical Aspects of Tectonic Control, Structural Features and Estimates of Depth of Erosion from the Urals to the Pacific 欧亚大陆北部的斑岩矿床：从乌拉尔到太平洋的构造控制、结构特征和侵蚀深度估算的实际方面

IF 0.7 4区地球科学 Q3 Earth and Planetary Sciences

Geology of Ore Deposits

Pub Date : 2024-04-17 DOI: 10.1134/s1075701524010094

A. S. Yakubchuk

Abstract

Higher gold grades (0.1–1 g/t) in porphyry systems of northern Eurasia make them competitive with the Andean porphyries despite usually smaller volumes of mineralization and lower copper grades. It is concluded that porphyry systems of northern Eurasia occurred in island arc settings as did the porphyries of the West Pacific, contrary to the Andean continental magmatic arcs. The paper considers structural and tectonic control of porphyry clusters in northern Eurasia, as well as practical aspects to estimate the depth of erosion in porphyry systems.

摘要欧亚大陆北部斑岩系统的金品位较高（0.1-1 克/吨），尽管矿化量通常较小，铜品位较低，但仍可与安第斯斑岩相媲美。结论是，欧亚大陆北部的斑岩系统与西太平洋的斑岩一样，都发生在岛弧环境中，与安第斯大陆岩浆弧相反。论文考虑了欧亚大陆北部斑岩群的结构和构造控制，以及估计斑岩系统侵蚀深度的实际问题。

引用次数: 0

Features of the Mineralogy of the Ores of the Southern Flank of the Mutnovskoe Gold–Silver–Polymetallic Deposit (Southern Kamchatka) 穆特罗夫斯科金-银-多金属矿床南翼（堪察加半岛南部）矿石矿物学特征

IF 0.7 4区地球科学 Q3 Earth and Planetary Sciences

Geology of Ore Deposits

Pub Date : 2024-04-17 DOI: 10.1134/s1075701524010057

K. O. Shishkanova, V. M. Okrugin, T. M. Filosofova

Abstract

The Mutnovskoe deposit is one of the largest and most prospective ore deposits in South Kamchatka. The northern and southern flanks within the main veining zone Opredelyayushchaya, composed of low-sulfi (goldsilver) and sulfide-polymetallic (gold-silver-polymetallic) types of ores, respectively, are distinguished. The paper presents the results of the complex mineralogical and geochemical studies of the gold-silver-polymetallic ores of the southern flank of the deposit. Features of textures and structures, mineral, chemical compositions and genesis of the ores, as well forms of precious and base metals occurrences are shown. Typomorphic features of pyrite, sphalerite, galena, chalcopyrite, tennantite-tetrahedrite, Au, Ag, Pb and Bi tellurides, native gold, Bi, Se and Ag sulfosalts are characterized. The pyrite-sphalerite, quartz, sphalerite-galena-quartz, and chalcopyrite-tennantite-tetrahedrite mineral associations are distinguished. The temperatures and composition of ore-forming solutions are shown.

摘要 Mutnovskoe 矿床是南堪察加半岛最大、最具潜力的矿床之一。主要脉带 Opredelyayushchaya 的北翼和南翼分别由低硫（金银）矿石和硫化物多金属（金银多金属）矿石组成。本文介绍了对矿床南侧金银多金属矿石进行的复杂矿物学和地球化学研究的结果。文中展示了矿石的纹理和结构特征、矿物、化学成分和成因，以及贵金属和贱金属的分布形式。黄铁矿、闪锌矿、方铅矿、黄铜矿、天南星四面体矿、金、银、铅和铋碲化物、原生金、铋、硒和银硫化物的典型形态特征得到了描述。对黄铁矿-闪锌矿、石英、闪锌矿-方铅矿-石英和黄铜矿-田锰矿-四面体矿的矿物关联进行了区分。图中显示了成矿溶液的温度和成分。

引用次数: 0

The Ryabinovoe Porphyry Cu–Au Deposit (Southern Yakutia): Geology, Wallrock Alteration, Noble Gases Isotope Systematics and Isotopic Dating of Mineralization Processes Ryabinovoe 斑岩型铜金矿床（南雅库特）：地质、岩壁蚀变、惰性气体同位素系统学和成矿过程的同位素定年

IF 0.7 4区地球科学 Q3 Earth and Planetary Sciences

Geology of Ore Deposits

Pub Date : 2024-04-17 DOI: 10.1134/s1075701524010045

N. V. Shatova, A. V. Molchanov, A. V. Terekhov, V. V. Shatov, O. V. Petrov, S. A. Sergeev, E. M. Prasolov, G. P. Dvornik, V. I. Leontev

Abstract

In the territory of the Ryabinovoe porphyry copper-gold deposit, ore mineralization is confined to multi-stage metasomatism fields, which were formed in two stages. At the first, pre-ore stage, high-temperature potassium-sodium metasomatites (aegirine feldspathites) were formed, at the second stage, medium-low-temperature wallrock gumbeites in the form of two facies varieties: carbonate-sericite-muscovite-orthoclase and quartz-carbonate-barite-adular varieties. Results of isotope studies (U-Pb, Rb-Sr, Re-Os, ⁴⁰Ar/³⁶Ar, ³He/⁴He, ²⁰Ne) of the aforementioned metasomatites and ore mineralization are discussed in the paper.

摘要在 Ryabinovoe 斑岩型铜金矿床区域，矿石成矿作用仅限于多期变质岩场，这些变质岩场分两个阶段形成。在第一阶段，即成矿前阶段，形成了高温钾钠变质岩（黑云母长石）；在第二阶段，形成了中低温壁岩胶粒岩，有碳酸盐-绢云母-绿泥石-正长岩和石英-碳酸盐-长石-金刚石两种面貌。文中讨论了对上述变质岩和矿石成矿作用的同位素研究结果（U-Pb、Rb-Sr、Re-Os、40Ar/36Ar、3He/4He、20Ne）。

引用次数: 0

Conditions of Formation of the Pavlik Gold–Sulfide–Quartz Deposit (Northeast of Russia) According to a Study of Fluid Inclusions 根据流体包裹体研究得出的帕夫利克金-硫化物-石英矿床（俄罗斯东北部）的形成条件

IF 0.7 4区地球科学 Q3 Earth and Planetary Sciences

Geology of Ore Deposits

Pub Date : 2024-04-01 DOI: 10.1134/s1075701523700046

A. V. Volkov, V. Prokofiev, V. V. Aristov, N. V. Sidorova

引用次数: 0

The Redox State of Chromium Ores of the Polar Urals 极地乌拉尔铬矿的氧化还原状态

IF 0.7 4区地球科学 Q3 Earth and Planetary Sciences

Geology of Ore Deposits

Pub Date : 2024-04-01 DOI: 10.1134/s1075701523600251

P. B. Shiryaev, N. V. Vakhrusheva

引用次数: 0

Sulfide and Selenide PGE Mineralization in Chromitites of the Dunzhugur Ophiolite Massif (East Sayan, Russia) 顿珠古尔蛇绿岩地块（俄罗斯东萨扬）铬铁矿中的硫化物和硒化物PGE成矿作用

IF 0.7 4区地球科学 Q3 Earth and Planetary Sciences

Geology of Ore Deposits

Pub Date : 2024-04-01 DOI: 10.1134/S1075701523600330

O. N. Kiseleva, E. V. Ayriyants, S. M. Zhmodik, D. Belyanin

引用次数: 0

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