Shaping post-orogenic landscapes by climate and chemical weathering
نویسندگان
چکیده
منابع مشابه
Erosional and climatic effects on long-term chemical weathering rates in granitic landscapes spanning diverse climate regimes
We used cosmogenic nuclide and geochemical mass balance methods to measure long-term rates of chemical weathering and total denudation in granitic landscapes in diverse climatic regimes. Our 42 study sites encompass widely varying climatic and erosional regimes, with mean annual temperatures ranging from 2 to 25 jC, average precipitation ranging from 22 to 420 cm year , and denudation rates ran...
متن کاملBiota and Chemical Weathering
The Earth has an average surface temperature of about 15°C, which is, in terms of planetary conditions suitable for life, the equivalent of winning the cosmic lottery. Yet, without an atmosphere filled with biological waste gases capable of retaining heat (O2, N2O, CH4, CO2), the average temperature of the planet would be about −18°C (Smil 2002), making the present diversity and abundance of li...
متن کاملRegulating continent growth and composition by chemical weathering.
Continents ride high above the ocean floor because they are underlain by thick, low-density, Si-rich, and Mg-poor crust. However, the parental magmas of continents were basaltic, which means they must have lost Mg relative to Si during their maturation into continents. Igneous differentiation followed by lower crustal delamination and chemical weathering followed by subduction recycling are pos...
متن کاملChemical weathering, mass loss, and dust inputs across a climate by time matrix in the Hawaiian Islands
We determined the total mass loss and rate of chemical weathering from three minimally eroded, Hawaiian lava flows that are ∼10, 170, and 350 ka old. Using a backhoe, we sampled the entire weathering zone at 28 sites and measured the depletion or enrichment of each major element in each soil horizon relative to parent material. We were able to assess the influence of both climate and substrate ...
متن کاملShaping Future Landscapes: the Scenario Approach
European landscapes change rapidly due to increasing pressure of urbanization on agricultural land. Thus, there is a large interest from policy and public on the future shape of landscapes. The interest is putting high demands on individuals that are involved in the decision-making and research process. Landscape indicators get increasing importance in current studies on landscapes change, but—...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Geology
سال: 2013
ISSN: 1943-2682,0091-7613
DOI: 10.1130/g34721.1