Surfacial mineralogy of coastal acid sulfate soils in urbanization area of Pinjarra, Western Australia
Author(s):
Abstract:
Acid sulfate soils in Western Australia commonly occur in coastal regions. One of the greatest threats to coastal environment is the disturbance of acid sulfate soils due to urban development which can lead to widespread acidification of lands and streams and subsequent economic losses onsite or in adjacent areas. Surface sampling from different landforms of the study area and analytical results of XRD, SEM and VNIR indicate that morphological and surfacial minerals variations, due to oxidative sulfide weathering processes in affected landscape. In dry season, the surface mineralogy of salt affected zone is dominated by halite, gypsum, barite and importantly, iron oxyhydroxides crusts (ferrihydrite, schwertmannite). The oxidative weathering of the jarosite with rapid oxidation of Fe2+, can generate iron oxyhydroxides and acid. The visible near infra-red (VNIR) reflectance spectra of the surface minerals from salt affected zone and acid sulfate soils horizon, showed spectral differences expressed in the VNIR region due to absorption bands of iron oxides and hydroxides. The spectral difference can be utilized for regional scale mapping of coastal acid sulfate soils disturbance due to urbanization in Pinjarra area via hyperspectral and multispectral remote sensing.
Language:
Persian
Published:
Iranian Journal of Crystallography and Mineralogy, Volume:17 Issue: 4, 2010
Pages:
692 to 701
magiran.com/p709616
دانلود و مطالعه متن این مقاله با یکی از روشهای زیر امکان پذیر است:
اشتراک شخصی
با عضویت و پرداخت آنلاین حق اشتراک یکساله به مبلغ 1,390,000ريال میتوانید 70 عنوان مطلب دانلود کنید!
اشتراک سازمانی
به کتابخانه دانشگاه یا محل کار خود پیشنهاد کنید تا اشتراک سازمانی این پایگاه را برای دسترسی نامحدود همه کاربران به متن مطالب تهیه نمایند!
توجه!
- حق عضویت دریافتی صرف حمایت از نشریات عضو و نگهداری، تکمیل و توسعه مگیران میشود.
- پرداخت حق اشتراک و دانلود مقالات اجازه بازنشر آن در سایر رسانههای چاپی و دیجیتال را به کاربر نمیدهد.
In order to view content subscription is required
Personal subscription
Subscribe magiran.com for 70 € euros via PayPal and download 70 articles during a year.
Organization subscription
Please contact us to subscribe your university or library for unlimited access!