北太平洋大陆边缘卡林型大型含金省形成的地球动力学因素

IF 0.9 Q4 GEOSCIENCES, MULTIDISCIPLINARY AIMS Geosciences Pub Date : 2023-01-01 DOI:10.3934/geosci.2023036
Vadim Khomich, Svyatoslav Shcheka, Natalia Boriskina
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引用次数: 0

摘要

& lt; abstract>在现代构造、地球物理和地震层析成像观测的基础上,在美国内华达州和俄罗斯南雅库特省确定了几个类似的指示区,并分析了北太平洋大型含金省形成和分布的主要地球动力因素。其中一个重要的成矿特点是各种各样的地层和矿床集中在该地区。两个省都位于被褶皱冲断带包围的活动边缘。在南雅库特,记录了亚垂直的Baikal-Elkon-Ulkan和下沉的Seligdar-Verkhnetimpon重力场梯度带的组合。内华达裂谷北部和高阶梯度带的重力正异常较为明显。两省的大型岩体和转换断裂带支持了地球动力因素在该地区成矿-岩浆系统发育中起根本作用的结论。北美大陆下不仅存在门多西诺转换断裂带,而且存在胡安-德-富卡古扩张中心,这可以解释各省份金矿化规模的显著差异。相比之下,只有Inagli-Konder-Feklistov岩浆成矿带控制着亚洲大陆下的成矿作用。& lt; / abstract>
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Geodynamic factors in the formation of large gold-bearing provinces with Carlin-type deposits on continental margins in the North Pacific

Several similar indicators in Nevada (USA) and South Yakutia (Russia) gold-bearing provinces have been identified based on modern tectonic, geophysical and seismic tomography observations, followed by the analysis of the main geodynamic factors of the formation and distribution of large gold-bearing provinces in the North Pacific. One of the significant metallogenic peculiarities is a wide variety of formational and mineral deposits concentrated in the areas. Both provinces are situated at active margins surrounded by fold-thrust belts. In South Yakutia, a combination of sublatitudinal Baikal-Elkon-Ulkan and submeridional Seligdar-Verkhnetimpon gravity field gradient zones is recorded. In contrast, significant positive gravity anomalies of the Northern Nevada Rift and higher-order gradient zones are presented in Nevada. Large pluton and transform fault zones in both provinces support a conclusion about the fundamental role of geodynamic factors in developing ore-magmatic systems in the regions. Significant differences in the scale of the gold mineralization in the considered provinces are explained by the existence under the North American continent not only of the Mendocino transform fault zone but also of the Juan de Fuca paleo-spreading center. In contrast, the Inagli-Konder-Feklistov magmatic-metallogenic belt alone controls mineralization under the Asian continent.

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来源期刊
AIMS Geosciences
AIMS Geosciences GEOSCIENCES, MULTIDISCIPLINARY-
自引率
7.70%
发文量
31
审稿时长
8 weeks
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