Zobrazeno 1 - 10
of 38
pro vyhledávání: '"Hsueh-Wen Yeh"'
Publikováno v:
Forest Ecology and Management. 235:84-87
Nitrogen is often limiting to primary production. We studied the sources of N used by vegetation and the cycles of N in Guandaushi forest ecosystem, central Taiwan, which is a long-term ecological network (LTER), established in 1994. Samples of trans
Publikováno v:
Sedimentary Geology. 177:87-96
The mineralogical, chemical, and isotopic compositions were determined for a white tripoli from the footwall of the Jurassic Urkut Mn-oxide ore deposit in the Bakony Mountains, Hungary. The tripoli consists of quartz and chalcedony, with SiO2 content
Publikováno v:
Ore Geology Reviews. 15:55-69
The Lijiaying Mn deposit, located about 250 km southwest of Xian, is a high-quality ore characterized by low P and Fe contents and a mean Mn content of about 23%. The ore deposit occurs in shallow-water marine sedimentary rocks of probable Middle Pro
Publikováno v:
Ore Geology Reviews. 15:95-134
The Tiantaishan phosphorite–Mn carbonate ores occur in the Early Cambrian Tananpo Formation in complexly folded and faulted rocks located in southern Shaanxi Province. About 65×10 6 tonnes of 17% P 2 O 5 ore reserves exist and Mn-ore reserves are
Publikováno v:
Clays and Clay Minerals. 46:1-9
Clay mineral compositions from 2 paleosol profiles (Chu-Wan, CW, and Shiao-Men Yu, SMY, profiles) on the late-Miocene sediments in Penghu Islands (Pescadores), Taiwan, are characterized by random X-ray powder diffraction (XRD) and transmission electr
Publikováno v:
Journal of Raman Spectroscopy. 27:823-827
Using a cubic zirconia anvil cell, a Raman spectroscopic study was carried out to measure the D–O stretch modes in D2O as a function of varying pressure up to 16.7 GPa. The observed Raman spectra of D2O at room temperature show not only that the li
Publikováno v:
Earth and Planetary Science Letters. 125:105-118
To investigate the growth rates and absolute time stratigraphy of marine hydrogenetic ferromanganese encrustations, we performed 10Be profiling and ‘Co chronometry’ of crustal layers, as well as 87Sr86Sr and δ18O analysis of phosphatised limesto
Publikováno v:
Journal of Environmental Polymer Degradation. 2:201-209
A new method for evaluating biodegradability of starch-based and certain other polymer blends uses the pre- and postexposure stable carbon isotope composition of material coupled with weight loss data to determine which components have degraded. The
Autor:
Chung-Ho Wang, Hsueh-Wen Yeh, James R. Hein, Susan H. Gunn, William V. Sliter, Laura M. Benninger
Publikováno v:
Paleoceanography. 8:293-311
Seamount phosphorites have been recognized since the 1950s, but this is the first study to provide an in depth exploration of the origin and history of these widespread deposits. Representative samples from equatorial Pacific Cretaceous seamounts wer
Publikováno v:
Earth and Planetary Science Letters. 114:517-528
DSRV Alvin dives in the Northern Mariana island arc recovered warm hydrothermal fluids from the summit areas of seamounts Kasuga 2 and Kasuga 3, as well as hydrothermal deposits of elemental sulfur, Fe- and Mn-oxides, and nontronite. The composition