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Quartz overgrowth textures and fluid inclusion thermometry evidence for basin-scale sedimentary recycling: An example from the Mesozoic Barents Sea Basin
Basin Research ( IF 3.2 ) Pub Date : 2020-12-11 , DOI: 10.1111/bre.12531
Beyene G. Haile 1 , Lina H. Line 1 , Tore G. Klausen 2 , Snorre Olaussen 1, 3 , Christian H. Eide 2 , Jens Jahren 1 , Helge Hellevang 1, 3
Affiliation  

Sedimentary recycling has the potential to obscure source-to-sink relationships, provenance interpretations, burial history reconstructions and robust reservoir quality predictions in siliciclastic sedimentary basins. Here, we integrate petrographic and cathodoluminescence microtextures with fluid inclusion thermometry in quartz overgrowths to identify sedimentary recycling and to constrain the potential provenance candidate for recycled grains in Lower Mesozoic sandstone of the western Barents Sea basin. Four diagenetic imprints were recognized as proof of sediment recycling: (a) microtextural surface properties of overgrowths, (b) the presence of overgrowths at sutured grain contacts, (c) reversed diagenetic sequences and (d) fluid inclusions within quartz overgrowths. The diagenetic imprints confirm delivery of recycled sediments across the western Barents Sea basin. Their widespread distribution across the basin suggest that the recycled grains were derived from a drainage basin with regional-scale sediment dispersal potential during the latest Triassic. Furthermore, the drainage basin must have contained sedimentary rocks. Prior to surface exposure, the precursor sedimentary basin was subjected to burial temperatures exceeding 130°C, whereby syntaxial quartz overgrowths precipitated. This temperature indicates an uplift of around 3–4 km, which represents a significant tectonic event. Recycled quartz grains can provide insights on their provenance as they retain direct temperature records. The geothermal signatures and geographically widespread distribution of recycled quartz exclude spatially restricted intrabasinal highs and higher-temperature crystalline rocks as provenance candidates for the recycled grain portion. Our data support the contemporaneous Novaya Zemlya Fold and Thrust Belt as the most likely provenance candidate in the region. The integrated approach demonstrated herein can be used to constrain sediment recycling and partly eroded provenance candidates in sedimentary basins of equivalent setting worldwide, particularly in quartz-rich strata susceptible to sediment supply from older uplifted sedimentary basins.

中文翻译:

石英超长纹理和流体包裹体测温的证据表明盆地规模的沉积物再循环:以中生代巴伦支海盆地为例

沉积物再循环有可能掩盖硅质碎屑沉积盆地中的水源关系,物源解释,埋葬历史重建和可靠的储层质量预测。在这里,我们将岩相和阴极发光微结构与流体包裹体测温仪结合在一起,用于石英长足的生长,以识别沉积物的再循环并限制西部巴伦支海盆地中下生代砂岩中潜在的再生颗粒物源。四个成岩作用的印记被认为是沉积物再循环的证据:(a)过度生长的微观结构表面特性,(b)缝合的谷物接触处存在过度生长,(c)逆成岩作用序列和(d)石英过度生长内的流体包裹体。这些成岩作用印记证实了西部巴伦支海盆地的再循环沉积物的输送。它们在整个盆地中的广泛分布表明,再生谷物来自于最近三叠纪期间具有区域规模沉积物扩散潜力的流域盆地。此外,流域必须包含沉积岩。在暴露于表面之前,先驱沉积盆地经历了超过130°C的埋葬温度,由此沉淀出了语法上过度生长的石英。该温度表明隆起约3-4 km,这代表着重大的构造事件。回收的石英颗粒可以保留其直接的温度记录,因此可以提供有关其出处的见解。再生石英的地热特征和在地理上的广泛分布不包括空间受限的基底内高点和高温晶体岩,它们是再生谷物部分的物源候选物。我们的数据支持同期的Novaya Zemlya褶皱和推力带作为该地区最有可能的起源。本文演示的综合方法可用于限制全球范围内等量沉积盆地中的沉积物再循环和部分侵蚀物源候选物,特别是在易于从较老的隆起沉积盆地供应沉积物的富石英地层中。我们的数据支持同期的Novaya Zemlya褶皱和推力带作为该地区最有可能的起源。本文演示的综合方法可用于限制全球范围内等量沉积盆地中的沉积物再循环和部分侵蚀物源候选物,特别是在易于从较旧隆起沉积盆地供应沉积物的富含石英的地层中。我们的数据支持同期的Novaya Zemlya褶皱和推力带作为该地区最有可能的起源。本文演示的综合方法可用于限制全球范围内等量沉积盆地中的沉积物再循环和部分侵蚀物源候选物,特别是在易于从较旧隆起沉积盆地供应沉积物的富含石英的地层中。
更新日期:2020-12-11
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