Located between the Northern Province of Zambia and the southeastern Katanga Province of the Democratic Republic of Congo, Lakes Mweru and Mweru Wantipa are part of the southwest extension of the East African Rift System (EARS). Fault analysis reveals that, since the Miocene, movements along the active Mweru-Mweru Wantipa Fault System (MMFS) have been largely responsible for the reorganization of the landscape and the drainage patterns across the western branch of the EARS. To investigate the spatial and temporal patterns of fluvial-lacustrine landscape development, we determined in-situ cosmogenic ¹⁰Be and ²⁶Al using Accelerator Mass Spectrometry. A total of twenty-six quartzitic bedrock samples were collected from knickpoints across the Mporokoso Plateau (south of Lake Mweru) and the eastern part of the Kundelungu Plateau (north of Lake Mweru). Samples from the Mporokoso Plateau and close to the MMFS provide evidence of temporary burial. By contrast, surfaces located far from the MMFS appear to have remained uncovered since their initial exposure as they show consistent ¹⁰Be and ²⁶Al exposure ages ranging up to ~830 ka. Reconciliation of the observed burial patterns with morphotectonic and stratigraphic analysis reveals the existence of an extensive paleo-lake during the Pleistocene. Through hypsometric analyses of the dated knickpoints, the potential maximum water level of the paleo-lake is constrained to ~1200 m asl. High denudation rates (up to ~40 mm ka⁻¹) along the eastern Kundelungu Plateau suggest that footwall uplift, resulting from normal faulting, caused rapid river incision, thereby controlling paleo-lake drainage. The complex exposure histories recorded by ¹⁰Be and ²⁶Al may be explained because of lake water-level fluctuations caused by active normal faulting along the MMFS coupled with intense climate variations across southeastern Africa.

Mweru湖和Mweru Wantipa湖位于赞比亚北部省和刚果民主共和国东南部的Katanga省之间，是东非裂谷系统（EARS）西南延伸的一部分。断层分析表明，自中新世以来，沿活跃的Mweru-Mweru Wantipa断层系统（MMFS）的运动在很大程度上负责了EARS西侧分支的景观重组和排水模式。为了调查河流-湖泊景观发展的时空格局，我们确定了原位宇宙成因的¹⁰ Be和²⁶Al使用加速器质谱法。从横跨Mporokoso高原（Mweru湖南部）和Kundelungu高原东部（Mweru湖北部）的拐点收集了总共26个石英基岩样品。来自Mporokoso高原和MMFS附近的样本提供了临时埋葬的证据。相比之下，距离MMFS较远的表面自首次暴露以来似乎一直未被发现，因为它们显示出一致的¹⁰ Be和²⁶铝的暴露年龄可达830 ka。用构造构造和地层分析对观察到的埋葬模式进行核对，表明在更新世期间存在着广泛的古湖。通过对过时的拐点进行计量分析，古湖潜在的最大水位被限制在约1200 m asl。昆德拉伦古高原东部的高剥蚀率（高达〜40 mm ka ^-1）表明，正常断层导致的底盘隆起引起河流快速切开，从而控制了古湖排水。¹⁰ Be和²⁶记录的复杂接触历史可以解释Al的原因是由于MMFS沿线的正常正断层以及东南非洲的剧烈气候变化引起的湖水位波动。