喀麦隆pangar - djimrem带地质构造与贵金属、贱金属矿床的空间关系

IF 1 Q3 GEOCHEMISTRY & GEOPHYSICS
Constantin Mathieu Som Mbang, Marcelin Pemi Mouzong, Li Zhen Cheng, Jocelyne Laure Megne Tafone, Charles Antoine Basseka, Joseph Kamguia, Jacques Etamè
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引用次数: 0

摘要

本文使用的第3版地磁异常网格(EMAG2-v3)旨在建立喀麦隆中南部pangar - djamesim地区构造构造与金矿及其相关成矿的空间关系。对图像数据进行赤道还原、水平梯度、广义导数、伪重力等多种处理和变换,识别和圈定了大量与Syn-D1、Syn-D2、Syn-D3形变相关的断层。从这些断裂得到的主要方位(西东向、西东向、西北向、西北西向)决定了喀麦隆基底泛非构造和埃布尼亚构造的强度。图中断层与矿位的相关性确定了研究区金矿化的构造控制。此外,这些断裂与火成岩/变质沉积岩的空间关系表明,埃布尼亚和泛非造山运动有利于富金流体沿断裂和剪切带的循环。pangar - dj雷姆带金矿成矿为脉型(原生金),是由I型花岗岩侵入和在脆性-韧性剪切背景下的富集流体循环所致。与沉积矿床/岩石相关的假重力异常以及萨纳加断裂和bacimtar - oya断裂的SW-NE构造确定了由变质火山岩和变质沉积岩组成的碎屑沉积矿床环境,证明了含金石英脉的存在。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Spatial Relations between Geological Structures and Precious and Base Metal Deposits from Magnetic Investigation of the Pangar-Djérem Zone, Cameroon
The version three of Earth Magnetic Anomaly Grid (EMAG2-v3) used in this work is aimed at establishing the spatial relationships between tectonic structures and gold and associated mineralization in the Pangar-Djérem area, central and southern Cameroon. Various processing and transformation of image data such as the reduction to the equator, horizontal gradient, generalized derivative, and pseudogravity allowed the identification and delineation of numerous faults related to Syn-D1, Syn-D2, and Syn-D3 deformations. The main orientations, W-E, SW-NE, and SE-NW, obtained from these faults define the intensity of the Pan-African and Eburnian tectonics in the Cameroonian basement. Correlations between mapped faults and mineral occurrences define a structural control of gold mineralization in the study area. Furthermore, the spatial relationships between these faults and the igneous/metasedimentary rocks demonstrate that the Eburnian and Pan-African orogenies favoured the circulation of gold-enriched fluids along faults and shear zones. Gold mineralization in the Pangar-Djérem zone is of the vein type (primary gold), resulting from the intrusion of type I granites and the circulation of enriched fluids in a brittle to ductile shear context. The pseudogravity anomalies associated with the sedimentary deposits/rocks and the SW-NE structures of the Sanaga and Bétaré-Oya Faults define an environment of detrital sedimentary deposits, consisting of metavolcanic and metasedimentary rocks, and justify the existence of gold-bearing quartz veins.
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来源期刊
International Journal of Geophysics
International Journal of Geophysics GEOCHEMISTRY & GEOPHYSICS-
CiteScore
1.50
自引率
0.00%
发文量
12
审稿时长
21 weeks
期刊介绍: International Journal of Geophysics is a peer-reviewed, Open Access journal that publishes original research articles as well as review articles in all areas of theoretical, observational, applied, and computational geophysics.
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