Geomorphologic and Stratigraphic Evidence of Ongoing Transpressional Deformation Across Lake Azuei (Haiti)

James, Keith H.; Cormier, Marie-Hélène; Sloan, Heather; Ramsamooj, T.; Boisson, Dominique; Guerrier, Kelly; Hearn, C. K.; King, John W.; Momplaisir, R.; Symithe, Steeve; Ulysse, Sophia; Wattrus, N. J.

doi:10.1002/essoar.10501568.1

Cited by 2 publications

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“…Lake Azuei is 22 km long, from northwest to southeast; its maximum width is 12 km and it measures 30 m at its deepest (James et al, 2019). It is located in one of the driest regions of the country (Moron et al, 2015) due to the Cordillera Central rain shadow effect.…”

Section: Study Sitementioning

confidence: 99%

Hydroclimate reconstruction during the last 1000 years inferred from the mineralogical and geochemical composition of a sediment core from Lake-Azuei (Haiti)

et al. 2023

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This study aims to reconstruct the hydro-climatic variations over the last 1000 years in Haiti using mineralogical and geochemical composition of well dated lacustrine sediment core retrieved from Lake Azuei. The results show changes in sedimentological processes linked to environmental and climatic variations. The general pattern suggests a wetter Medieval Climate Anomaly (MCA), drier Little Ice Age (LIA), high climate variability during the MCA-LIA transition and more anthropogenic impacts that dominate natural climate during the Current Warm Period (CWP). The MCA period (~1000–1100 CE) thus appears marked by increase sedimentation rate supported by higher terrigenous input linked to erosive events particularly increases in precipitation. During the LIA, particularly from ~1450 to 1600 CE, there is a great variation toward a decrease of terrigenous input, which is related to a decrease on sedimentation rate and increase Mg-calcite precipitation, suggesting less precipitation and high evaporation respectively during dry climate conditions. The MCA-LIA transition (~1200–1400 CE) is characterized by variations between terrigenous input, Mg-calcite formation and organic matter deposition, which indicate succession of dry and humid conditions. The CWP (1800–2000 CE) shows a progressive increase on sedimentation rate and decrease of gray level, which indicate more organic matter sedimentation as consequence of anthropogenic activities in the surrounding basin of the lake. High-resolution gray level analysis, which reflects principally variations in terrigenous input, carbonate mineral formation and organic matter deposition, shows that the AMO, NAO, PDO and ENSO are the principal modes affecting the hydro-climatic changes in Haiti during the last millennium. In addition, temporal correlation of other Caribbean paleoclimate records with our geochemical and mineralogical data, suggests that trends observed in Lake Azuei were controlled by regional climate, likely associated with shifts in the position of the ITCZ.

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Section: Study Sitementioning

confidence: 99%

Hydroclimate reconstruction during the last 1000 years inferred from the mineralogical and geochemical composition of a sediment core from Lake-Azuei (Haiti)

et al. 2023

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“…At this locality, the EPGFZ juxtaposes the Caribbean large igneous province (CLIP) basement in the south against Miocene carbonate sediments in the north. Further west of the Momance River, where the EPGFZ exits the fan complex, Hornbach et al (2010) collected Chirp high-resolution seismic profiles offshore, and Kocel et al (2016) collected near-surface seismic reflection profiles onshore. In that region, the fan is known to be relatively thick and coarse grained with bouldersized limestones.…”

Section: Drilling Perspectivesmentioning

confidence: 99%

“…4c). Lake Azuei, a brackish and perhaps anoxic lake (Eisen-Cuadra et al, 2013), with depths down to 30 m (Moknatian et al, 2017;James et al, 2019), is an ideal drilling target for a multidisciplinary drilling project. Based on recent short coring (namely, Project Lake Azuei), the sediment deposition is mostly continuous and undisturbed, and the fact that the lake is wedged between two high, active mountain ranges guarantees that it collects the by-product of mountain erosion.…”

Section: Drilling Perspectivesmentioning

confidence: 99%

Haiti-Drill: an amphibious drilling project workshop

et al. 2020

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Abstract. The Haiti region – bounded by two strike-slip faults expressed both onshore and offshore – offers a unique opportunity for an amphibious drilling project. The east–west (EW)-striking, left lateral strike-slip Oriente–Septentrional fault zone and Enriquillo–Plantain Garden fault zone bounding Haiti have similar slip rates and also define the northern and southern boundaries of the Gonâve Microplate. However, it remains unclear how these fault systems terminate at the eastern boundary of that microplate. From a plate tectonic perspective, the Enriquillo–Plantain Garden fault zone can be expected to act as an inactive fracture zone bounding the Cayman spreading system, but, surprisingly, this fault has been quite active during the last 500 years. Overall, little is understood in terms of past and present seismic and tsunami hazards along the Oriente–Septentrional fault zone and Enriquillo–Plantain Garden fault zone, their relative ages, maturity, lithology, and evolution – not even the origin of fluids escaping through the crust is known. Given these unknowns, the Haiti-Drill workshop was held in May 2019 to further develop an amphibious drilling project in the Haiti region on the basis of preproposals submitted in 2015 and their reviews. The workshop aimed to complete the following four tasks: (1) identify significant research questions; (2) discuss potential drilling scenarios and sites; (3) identify data, analyses, additional experts, and surveys needed; and (4) produce timelines for developing a full proposal. Two key scientific goals have been set, namely to understand the nature of young fault zones and the evolution of transpressional boundaries. Given these goals, drilling targets were then rationalized, creating a focus point for research and/or survey needs prior to drilling. Our most recent efforts are to find collaborators, analyze existing data, and to obtain sources of funding for the survey work that is needed.

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Geomorphologic and Stratigraphic Evidence of Ongoing Transpressional Deformation Across Lake Azuei (Haiti)

Cited by 2 publications

References 3 publications

Hydroclimate reconstruction during the last 1000 years inferred from the mineralogical and geochemical composition of a sediment core from Lake-Azuei (Haiti)

Hydroclimate reconstruction during the last 1000 years inferred from the mineralogical and geochemical composition of a sediment core from Lake-Azuei (Haiti)

Haiti-Drill: an amphibious drilling project workshop

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