Russian Journal of Pacific Geology最新文献_第7页

The Ore Potential of the Late Mesozoic Ariadnensky Massif of Ultramafic, Mafic, and Granitoid Rocks (Sikhote-Alin Orogenic Belt) 中生代晚期超基性岩、黑云母岩和花岗岩的阿里亚德嫩斯基地块（锡克浩特-阿林造山带）的矿石潜力

IF 0.8 4区地球科学

Russian Journal of Pacific Geology Pub Date : 2024-01-30 DOI: 10.1134/s1819714023060052

A. I. Khanchuk, V. P. Molchanov

{"title":"The Ore Potential of the Late Mesozoic Ariadnensky Massif of Ultramafic, Mafic, and Granitoid Rocks (Sikhote-Alin Orogenic Belt)","authors":"A. I. Khanchuk, V. P. Molchanov","doi":"10.1134/s1819714023060052","DOIUrl":"https://doi.org/10.1134/s1819714023060052","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>In the south of the Russian Far East, a new promising type of source of strategic and critically important metals (titanium, gold, platinum, niobium, hafnium, copper, antimony, etc.) has been discovered: these are complex ores and placers that are spatially and genetically related to the Late Mesozoic (Cenomanian?) synorogenic intrusions of ultramafic–mafic rocks of the Sikhote-Alin orogenic belt. One example is the Ariadnensky massif of ultramafic, mafic and granitoid rocks with gold-titanium mineralization in its mafic part, gold-antimony mineralization at the exocontact, and gold-copper mineralization in the circum-intrusive zone. The main mineralogical and geochemical features of these ore formations have been determined. The typomorphic properties of native gold from ultramafic rocks have been revealed. It is shown that mantle and crustal processes were involved in the formation of different types of ore. The materials we obtained provide new opportunities for the reassessment of potential of strategic metal resources in Primorye.</p>","PeriodicalId":49583,"journal":{"name":"Russian Journal of Pacific Geology","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2024-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139646441","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Erratum to: Ferromanganese Crusts of the North Pacific Ocean 勘误：北太平洋铁锰结壳

IF 0.8 4区地球科学

Russian Journal of Pacific Geology Pub Date : 2024-01-30 DOI: 10.1134/s1819714023060106

P. E. Mikhailik, A. I. Khanchuk, E. V. Mikhailik, V. A. Rashidov, D. P. Savelyev, N. V. Zarubina

引用次数: 0

Provenance Evolution and Its Response to Sea Level Change in the South Yellow Sea since 1.0 Ma 1.0 Ma以来南黄海的产状演变及其对海平面变化的响应

IF 0.8 4区地球科学

Russian Journal of Pacific Geology Pub Date : 2023-12-22 DOI: 10.1134/s1819714024010081

Zhonglei Wang, Yong Zhang, Bei-bei Mi, Zhongbo Wang, Yanguang Dou, Jingyi Cong, Jun Sun

引用次数: 0

Transformation of Gravity Anomalies in Large Territories (the Case of the Kuril Island Arc) 大片领土重力异常的变化（千岛群岛弧形地带的案例）

IF 0.8 4区地球科学

Russian Journal of Pacific Geology Pub Date : 2023-12-01 DOI: 10.1134/s1819714023080055

{"title":"Transformation of Gravity Anomalies in Large Territories (the Case of the Kuril Island Arc)","authors":"","doi":"10.1134/s1819714023080055","DOIUrl":"https://doi.org/10.1134/s1819714023080055","url":null,"abstract":"<span> <h3>Abstract</h3> <p>An algorithm and a program for transformation of gravity anomalies for large territories are presented. They use a spherical shape of the Earth and the geodetic coordinates of measuring points. The calculations employ the “quasi-ellipsoidal” model of V.V. Kavraisky, which allows the transition from the geodetic to the spherical coordinate system with increased accuracy. The algorithm is based on a sourcewise approximation of the field values located at the nodes of a regular grid with the latitude-dependent depths of the equivalent sources. To determine the source masses, the system of linear algebraic equations is solved by the steepest descent gradient method with an accelerated calculation of the step. The results of transformation of the gravitational field in the Bouguer reduction for the Kuril Island arc, the adjacent water and land areas located within 40°–54° N, 142°–162° E and having a total area of about 2.4 mln km<sup>2</sup>, are presented. A slight difference between the results of recalculating the gravity anomalies into the upper half-space using the “spherical” and “quasi-ellipsoidal” models of the Earth is experimentally established.</p> </span>","PeriodicalId":49583,"journal":{"name":"Russian Journal of Pacific Geology","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139759350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Variety of the Relief of the Northeastern Atlantic Volcanic Seamounts 东北大西洋火山海山地貌的多样性

IF 0.8 4区地球科学

Russian Journal of Pacific Geology Pub Date : 2023-12-01 DOI: 10.1134/s1819714023080171

引用次数: 0

Geological Setting and Gold–Bismuth Mineralization of the Namovskoe Deposit (Southern Sikhote-Alin) 纳莫夫斯科（Namovskoe）矿藏（南锡霍特-阿林）的地质构造和金铋矿化作用

IF 0.8 4区地球科学

Russian Journal of Pacific Geology Pub Date : 2023-12-01 DOI: 10.1134/s1819714023060040

{"title":"Geological Setting and Gold–Bismuth Mineralization of the Namovskoe Deposit (Southern Sikhote-Alin)","authors":"","doi":"10.1134/s1819714023060040","DOIUrl":"https://doi.org/10.1134/s1819714023060040","url":null,"abstract":"<span> <h3>Abstract</h3> <p>Based on the results of a comprehensive geological, mineralogical, and geochemical study of ores of the Namovskoe deposit, new data on the specifics of mineralization were obtained. The ores of the deposit were formed in close relation to the Early Cretaceous monzonitoid magmatism against the background of active left-hand movements along the Middle Sikhote-Alin fault. The U–Pb dating of the ore-bearing dyke provided an age of 103 Ma. In addition to native Au, the ores of the deposit contain high concentrations of Ag, Bi, and Cu. A variety of Bi minerals were registered in the ores: sulfide (bismuthinite), telluride (hedleyite), sulfotellurides (tetradymite, joseite-А, and joseite-В), Ag sulfobismuthite (matildite), Pb–Bi sulfosalts (aschamalmite, cannizzarite, cosalite, lillianite, nuffieldite, and galenobismuthite), an intermetallic compound of Au (maldonite), and native Bi. Ag minerals were identified as well: chloride (cerargyrite), sulfide (acanthite), and telluride (hessite). The typomorphic patterns of ore minerals and the geological structure of the Namovskoe deposit assign it to the type of gold deposits formed in a transform continental margin setting. A mantle source of ore mineralization is suggested.</p> </span>","PeriodicalId":49583,"journal":{"name":"Russian Journal of Pacific Geology","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139646276","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Ages and Isotope Compositions of the Gold–Silver Deposits and Occurrences of the Evensk Group (Okhotsk–Chukotka Volcanogenic Belt, Northeast Russia) 埃文斯克岩群（俄罗斯东北部鄂霍次克-楚科奇火山成因带）金银矿床和矿点的年龄与同位素组成

IF 0.8 4区地球科学

Russian Journal of Pacific Geology Pub Date : 2023-12-01 DOI: 10.1134/s1819714023060076

{"title":"The Ages and Isotope Compositions of the Gold–Silver Deposits and Occurrences of the Evensk Group (Okhotsk–Chukotka Volcanogenic Belt, Northeast Russia)","authors":"","doi":"10.1134/s1819714023060076","DOIUrl":"https://doi.org/10.1134/s1819714023060076","url":null,"abstract":"<h3>Abstract</h3> <p>The existing and recently acquired data on the isotope ages and compositions of volcanogenic Au–Ag deposits and occurrences of the Evensk group (Okhotsk–Chukotka volcanogenic belt, Northeast Russia) are summarized. The K–Ar isotope and Rb–Sr isochron ages of Au–Ag ores from the studied deposits and occurrences are 82.7 ± 3–77.5 ± 3 Ma and 84.1 ± 2–79.7 ± 5 Ma, respectively. Au–Ag mineralization was formed within ~5 Ma. Au–Ag mineralization typical of productive ore stages and practically unaffected by later thermal processes is characterized by low initial <sup>87</sup>Sr/<sup>86</sup>Sr<sub>(0)</sub> = 0.7055–0.7059 ratios, which are close to the initial <sup>87</sup>Sr/<sup>86</sup>Sr<sub>(0)</sub> ratios in wall-rock metasomatites (0.7033–0.7082) and unaltered host rocks (0.7045–0.7048), thus indicating a pronounced predominance of mantle Sr in the ores. The composition points of ore Pb on the <sup>207</sup>Pb/<sup>204</sup>Pb–<sup>206</sup>Pb/<sup>204</sup>Pb evolution diagram are grouped in close proximity to the Pb isotope composition points in the depleted mantle with a trend towards the subduction-related volcanic rocks typical of the continental margin. A close genetic relationship between the ore and magmatic processes has been confirmed. It is assumed that this relationship is due to the functioning of a single mantle basaltic chamber, which served as a source of metal-bearing fluids and is probably the primary source of Au and Ag.</p>","PeriodicalId":49583,"journal":{"name":"Russian Journal of Pacific Geology","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139646439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Submarine Volcano 8.10 (Kuril Island Arc) 海底火山 8.10（千岛群岛弧形地带）

IF 0.8 4区地球科学

Russian Journal of Pacific Geology Pub Date : 2023-12-01 DOI: 10.1134/s1819714023080031

{"title":"Submarine Volcano 8.10 (Kuril Island Arc)","authors":"","doi":"10.1134/s1819714023080031","DOIUrl":"https://doi.org/10.1134/s1819714023080031","url":null,"abstract":"<span> <h3>Abstract</h3> <p>Submarine volcano 8.10, which is part of the South Iturup group of submarine volcanoes in the Kuril Island Arc (KIA), was studied using a proven technology of quantitative interpretation of hydromagnetic survey materials in combination with echo sounding, continuous seismoacoustic profiling, and analysis of petromagnetic properties and chemical composition of dredged rocks. The technology makes it possible to interpret directly from the original data without resorting to the procedure of their preliminary restoration in the nodes of a regular grid. The studies found that dredged andesite-basalts and andesites are representatives of different lava flows that have a single magma source but differ in the conditions and dynamics of crystallization. The main carrier of the natural residual magnetization of andesite-basalts is titanomagnetite with low Ti content and that for andesites is magnetite. Feeding channels and peripheral magma chambers are identified in the volcanic edifice. Submarine volcano 8.10 and other studied KIA volcanoes formed during geomagnetic inversions. The presence of hydroacoustic anomalies at the top of the volcano indicates that manifestations of underwater gas-hydrothermal activity in the southern part of the KIA are more significant than was thought until recently.</p> </span>","PeriodicalId":49583,"journal":{"name":"Russian Journal of Pacific Geology","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139759421","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Arc-Parallel Strike-Slip Faulting in an Island Arc under Arc-Normal Subduction: The Case of Kamchatka 弧正俯冲下岛弧内的弧平行走滑断裂:以堪察加半岛为例

4区地球科学

Russian Journal of Pacific Geology Pub Date : 2023-10-01 DOI: 10.1134/s1819714023050044

A. I. Kozhurin, T. K. Pinegina, V. V. Ponomareva

引用次数: 0

The Lithosphere Structure in the Northern Part of the Southern Sikhote-Alin Region According to the Magnetotelluric Sounding Data 根据大地电磁测深资料研究南锡霍特-阿林地区北部岩石圈结构

4区地球科学

Russian Journal of Pacific Geology Pub Date : 2023-10-01 DOI: 10.1134/s1819714023070035

V. B. Kaplun, A. K. Bronnikov

引用次数: 0