Scholarlink

<p>Among the main Paleoproterozoic belts in Cameroon, the Eburnean Belt of the Nyong Complex (NyC) is the least studied. Here, we present recent structural and petrographic investigations conducted in the Lolodorf area of the NyC in southern Cameroon, which have enabled the reconstruction of the tectonic and geodynamic framework, as well as the crustal evolution of the NyC. The primary structural features of the remobilized zone are attributed to two migmatization cycles and two major deformation phases, identified through structural analysis and significant Paleoproterozoic deformation events. The initial migmatization (≈ 2836 ± 11&#xa0;Ma) is associated with the formation of the gneissic basement and the conformable, diffuse tonalite-trondhjemite-granodiorite (TTG) suites. This was followed by a major NW–SE compression phase that vertically reoriented the regional gneissic structures, accompanied by sinistral and dextral shearing. After these shearing events, discordant metamafic rocks and clinopyroxene-bearing metasyenites were emplaced during a second migmatization phase. These clinopyroxene metamafic rocks and metasyenites, dated at 2.9&#xa0;Ga and 2055 ± 5&#xa0;Ma, respectively, were followed by the intrusion of post-orogenic plutons.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Lithological, structural assemblies and main phases of Paleoproterozoic deformation in the Lolodorf zone (Nyong Complex, SW Cameroon)

  • 期刊论文

  • 发表日期：

    2025年7月3日

查看全文
  • Eric José Messi Ottou,
  • Philémon Rémi Etoundi Akoa,
  • Isaac Daama,
  • Yannick Saturnin Evina Aboula,
  • Sylvestre Martial Ntomba,
  • Emmanuel Nkonguin Nsifa,
  • Paul-Désiré Ndjigui

摘要

Among the main Paleoproterozoic belts in Cameroon, the Eburnean Belt of the Nyong Complex (NyC) is the least studied. Here, we present recent structural and petrographic investigations conducted in the Lolodorf area of the NyC in southern Cameroon, which have enabled the reconstruction of the tectonic and geodynamic framework, as well as the crustal evolution of the NyC. The primary structural features of the remobilized zone are attributed to two migmatization cycles and two major deformation phases, identified through structural analysis and significant Paleoproterozoic deformation events. The initial migmatization (≈ 2836 ± 11 Ma) is associated with the formation of the gneissic basement and the conformable, diffuse tonalite-trondhjemite-granodiorite (TTG) suites. This was followed by a major NW–SE compression phase that vertically reoriented the regional gneissic structures, accompanied by sinistral and dextral shearing. After these shearing events, discordant metamafic rocks and clinopyroxene-bearing metasyenites were emplaced during a second migmatization phase. These clinopyroxene metamafic rocks and metasyenites, dated at 2.9 Ga and 2055 ± 5 Ma, respectively, were followed by the intrusion of post-orogenic plutons.