黑龙江省北部新元古代—早石炭世洋—陆转换过程

现代矿业 ›› 2022, Vol. 38 ›› Issue (07): 20-.

黑龙江省北部新元古代—早石炭世洋—陆转换过程

张铁安赵雨生高洪岩刘宇奇刘宇崴杜兵盈

黑龙江省地质科学研究所

出版日期:2022-07-25 发布日期:2023-06-07
基金资助:
*中国地质调查局地质调查子课题（编号：12120114033501）。

Neoproterozoic-early Carboniferous Ocean-land Transformation in the North of Heilongjiang Province

ZHANG Tie'an ZHAO Yusheng GAO Hongyan LIU Yuqi LIU Yuwei DU Bingying

Heilongjiang Geological Science Institute

Online:2022-07-25 Published:2023-06-07

摘要/Abstract

摘要： 针对东北微地块群拼贴位置及构造演化这一重要科学问题，运用洋—陆转换及大陆动力学等地学理论，通过系统分析额尔古纳—松嫩地块间新元古代—早寒武世新林—塔源—兴隆俯冲增生杂岩带、早石炭世嫩江—黑河俯冲增生杂岩带的物质组成，甄别出了俯冲增生杂岩带内蛇绿岩的类型及构造环境。研究表明：新元古代—早寒武世新林—塔源—兴隆俯冲增生杂岩蛇绿岩类型主要包括SSZ 型蛇绿岩—富铌基性火山岩，地幔柱型蛇绿岩—超镁铁质岩、辉长岩组合，与弧—盆演化相关的蛇绿岩超镁铁质岩、辉长岩组合；早石炭世嫩江—黑河俯冲增生杂岩蛇绿岩类型主要是与弧—盆演化相关的超镁铁质岩、辉长岩组合。结合新元古代—早寒武世新林—塔源— 兴隆俯冲增生杂岩带、早石炭世嫩江—黑河俯冲增生杂岩带的物质组成和各期岩浆弧、区域磨拉石建造空间分布，总结了额尔古纳和松嫩地块之间新元古代—早石炭世洋—陆转换过程。

关键词: 洋—陆转换, 俯冲增生杂岩, 构造演化

Abstract: Aiming at the important scientific problem of the location and tectonic evolution of the northeast micro-block group in Northern China，based on the ocean-land conversion and continental dy⁃ namics theory，the types and tectonic environments of ophiolite in the erguna-Songnen block are identified by systematic analysis of the material composition of Xinlin-Tayuan-Xinglong subduction accretion com⁃ plex belt of Neoproterozoic to Early Cambrian and Nenjiang-Heihe subduction accretion complex belt of Early Carboniferous，and the types and tectonic setting of ophiolite in subduction accretion complex zone are identified.The study results show that：The ophiolite types of neoproterozoic Xinlin-Tayuan-Xinglong subduction accretion complex mainly include SSZ type ophiolite-niobium-rich basic volcanic rocks，mantle plume type ophiolite-ultramafic rock and gabbro assemblage，and ophiolite ultramafic rock and gabbro as⁃ semblage related to arc-basin evolution.The ophiolite type of the Nenjiang-Heihe subduction accretion complex in the Early Carboniferous is mainly composed of ultramafic and gabitic assemblages related to arc-basin evolution.Based on the material composition of Xinlin-Tayuan-Xinglong subduction accretion complex belt of Neoproterozoic and Early Cambrian，and the spatial distribution of magmatic arcs and re⁃ gional molasite formations of Nenjiang-Heihe subduction accretion complex belt of Early Carboniferous， the oceanic and continental transition process of Neoproterozoic and Early Carboniferous between Erguna Block and Songnen Block is summarized.

Key words: ocean-land transformation, subduction-accretionary complex, tectonic evolution

张铁安, 赵雨生, 高洪岩, 刘宇奇, 刘宇崴, 杜兵盈. 黑龙江省北部新元古代—早石炭世洋—陆转换过程[J]. 现代矿业, 2022, 38(07): 20-.

ZHANG Tie'an, ZHAO Yusheng, GAO Hongyan , LIU Yuqi , LIU Yuwei , DU Bingying. Neoproterozoic-early Carboniferous Ocean-land Transformation in the North of Heilongjiang Province[J]. Modern Mining, 2022, 38(07): 20-.

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