全球沉积率发生了怎样的变化在过去几十亿年呢?- 江南体育网页版- - - - -地球科学堆江南电子竞技平台栈交换 最近30从www.hoelymoley.com 2023 - 07 - 10 - t06:00:40z //www.hoelymoley.com/feeds/question/35 https://creativecommons.org/licenses/by-sa/4.0/rdf //www.hoelymoley.com/q/35 14 全球沉积率发生了怎样的变化在过去几十亿年呢? InquilineKea //www.hoelymoley.com/users/10 2014 - 04 - 15 - t21:29:15z 2016 - 01 - 22 - t16:41:09z < p >我们有沉积率随时间变化的图吗? < / p > //www.hoelymoley.com/questions/35/-/159 # 159 12 答案由tobias47n9e全球沉积率发生了怎样的变化在过去几十亿年呢? tobias47n9e //www.hoelymoley.com/users/23 2014 - 04 - 16 - t16:16:27z 2014 - 04 - 16 - t16:16:27z < p >沉降速度目前许多数量级的变化取决于你观察的地方。沉降的速度也不同。一些地方持续沉降,其他情景沉积事件。< / p > < p >这就是为什么图表显示沉降速率的变化通常是单个沉积盆地,盆地演化。这是用于许多盆地,特别是如果他们感兴趣的油气行业。< / p > //www.hoelymoley.com/questions/35/-/261 # 261 8 答案由hugovdberg全球沉积率发生了怎样的变化在过去几十亿年呢? hugovdberg //www.hoelymoley.com/users/79 2014 - 04 - 17 - t08:37:55z 2014 - 04 - 17 - t08:37:55z < p > Spießburger还提到在当地,他的回答沉积速率和高度取决于沉积盆地沉积物供应和住宿的房间。全球平均沉降率就所有的沉积盆地,是全球侵蚀率密切相关,尽管不一定相同的根据时间尺度看,溶解的矿物质不会直接导致沉积、侵蚀材料可以被困在例如冰川的大量的时间。侵蚀率的数量取决于erodable材料(所以地形、植被等)提供一些交通工具和气候条件。< / p > < p >总之全球平均沉降率可以计算,但最终这种间接影响了变化多端的原因,同时不提供有意义的数据,它可能不值得投资的时间。< / p > //www.hoelymoley.com/questions/35/-/7314 # 7314 5 答案由DrGC全球沉积率发生了怎样的变化在过去几十亿年呢? DrGC //www.hoelymoley.com/users/1379 2016 - 01 - 20 - t19:27:56z 2016 - 01 - 22 - t16:41:09z < p >大问题。< / p > < p >数据分辨率不够,无论是空间还是暂时。有地质时期认为经历了更高的侵蚀率的基础上丰富的沉积相,如在三叠纪。也有许多沉积盆地沉积演化的利率是众所周知的。但这很大程度上取决于当地的地理/构造条件,如提供的住宿空间构造沉降,所以它没有提供信息在全球范围内发生了什么。使它更加困难,有充分的迹象表明我们偏见的方式测量两个< a href = " http://www.nature.com/nature/journal/v505/n7483/full/505294a.html " rel =“nofollow”>侵蚀< / >和< a href = " http://clasticdetritus.com/2010/06/28/using-sedimentation-rates-to-infer-long-term-global-climate-change/ " rel =“nofollow”>沉降< / >,夸大最近运输率相对于长期。< / p > < p >有你想要的全球视角,作者需要一个连贯的,全球范围内,具有统计代表性的过去的侵蚀或沉降的措施,这对于每一个地质时期。但侵蚀和沉积需要数年时间来确定一个特定的盆地和造山带设置为一个特定的时期;差距是巨大的。< / p > < p >唯一大致量化在全球范围内是Miocene-Pliocene-Quaternary时期。 And even there the discussion is very open. The following studies suggest that global erosion/sedimentation rates have increased during the last 4-6 million years.

The first is based on a compilation of delta sedimentation rates:

Zhang, P., Molnar, P.& Downs, W. R. Increased sedimentation rates and grain sizes 2–4 Myr ago due to the influence of climate change on erosion rates. Nature 410, 891–897 (2001).

The second uses thermochronology, mostly Apatite Fission Track analyses:

Herman F, Seward D, Valla PG, Carter A, Kohn B,Willett SD, Ehlers TA. 2014. Worldwide acceleration of mountain erosion under a cooling climate. Nature 504: 423–426. DOI: 10.1038/nature12877

Both interpret the acceleration of erosion as a result of the changes in Earth's climate during that period: initiation of the glacial interglacial cycle in the northern hemisphere.

Due to the gaps in the geological outcrop record, and to our limited capacity of dating sediments, my bet is that it will take decades at least to have a reliable graph like the one you aim at.

Hope this helps.
Baidu
map