Results 81 to 90 of about 9,785 (280)

Food webs in forest and pasture streams in the Waikato region, New Zealand: A study based on analyses of stable isotopes of carbon and nitrogen, and fish gut contents.

, 1997
Stable isotopes of carbon (C) and nitrogen (N) were studied in 11 stream communities in the Waikato region of New Zealand. From comparisons of mean d13C and d15N values, food webs in the shaded, forest streams were clearly based on allochthonous material
Hicks, Brendan J., Brendan J. Hicks
core   +1 more source

Genesis and distribution of hydrogen sulfide in deep heavy oil of the Halahatang area in the Tarim Basin, China

Journal of Natural Gas Geoscience, 2017
As the largest oil-and-gas-bearing basin in China, the Tarim Basin contains rich oil and gas resources buried deep underground. In recent years, large oil fields have been discovered in the Halahatang area of the northern Tarim Basin.
Guangyou Zhu, Xingwang Liu, Haijun Yang, Jin Su, Yongfeng Zhu, Yu Wang, Chonghao Sun   +6 more
doaj   +1 more source

Stable Nitrogen and Sulfur Isotopes in Atmospheric Chemistry

, 2021
SO2 and NOx (NO+NO2) are important trace gases in the atmosphere as they adversely affect air quality and are precursors to sulfate and nitrate aerosols in the atmosphere.
Li, Jianghanyang
core  

Secular Evolution of Mantle Sulfur Isotopes Since the Archean

Geochemistry, Geophysics, Geosystems
Sulfur isotopes in mantle plume‐derived magmas show heterogeneities attributed to recycling of material from the Earth's surface. The sedimentary sulfur isotope record exhibits dramatic temporal variations over Earth history, raising the question of ...
J. Eguchi, B. A. Black, E. G. Nisbet, Y. Moussallam, G. Georgeais   +4 more
doaj   +1 more source

Paleoenvironmental reconstruction and carbon and sulfur isotopes perturbation in black shales of the Paleocene Bolander member in the N’kapa Formation, Douala Sub-basin Cameroon

Geosystems and Geoenvironment
Black shales deposited across the Paleocene Bolander member of the N’kapa Formation are considered important source rock and shale gas reservoirs in the Douala sub-basin.
Ngong Roger Ngia, Elie Fosso Menkem, Alexandrine N’Nanga, Christopher Fuanya, Median Yongye   +4 more
doaj   +1 more source

High sulfur isotope fractionation associated with anaerobic oxidation of methane in a low sulfate, iron rich environment

Frontiers in Earth Science, 2016
Sulfur isotope signatures provide key information for the study of microbial activity in modern systems and the evolution of the Earth surface redox system.
Hannah Sophia Weber, Bo eThamdrup, Kirsten Silvia Habicht, Kirsten Silvia Habicht   +3 more
doaj   +1 more source

Sulfur Isotopes Revealed a Major Role of Transition-Metal-Ion Catalyzed SO2 Oxidation in Haze Episodes

, 2019
sulfur isotopic data of sulfate collected during a severe haze episodes (Jan. 2015) in Nanjing, China, data used in manuscript "Sulfur Isotopes Revealed a Major Role of Transition-Metal-Ion Catalyzed SO2 Oxidation in Haze Episodes"
Li, J
core   +2 more sources

Redox and magma recharge controls on excess sulfur build-up at Mount Samalas, 1257 CE

Nature Communications
The 1257 CE eruption of Mount Samalas (Indonesia) caused the largest stratospheric sulfur injection of the Common Era, as recorded by Greenland and Antarctic ice cores, and led to strong climate perturbations.
Shuo Ding, Marc-Antoine Longpré, Rita Economos, Yasmin Jackson, Céline-Marie Vidal, Jean-Christophe Komorowski, Brian Monteleone   +6 more
doaj   +1 more source

Analysis of metallogenic material sources and metallogenic epoch of the Xiahulin lead-zinc deposit in inner Mongolia, China

Frontiers in Earth Science
The Xiahulin lead-zinc deposit serves as a classic skarn-type deposit in the Erguna Block of the Greater Khingan Range, containing uncertain metallogenic sources and epochs. The orebodies form complex shapes in the contact zone between granite and Sinian
Mingxin Duan, Mingxin Duan, Mingxin Duan, Guihu Chen, Guihu Chen, Tao Liu, Tao Liu, Liye Liu, Liye Liu, Xidong Zhao, Xidong Zhao   +10 more
doaj   +1 more source

Geological Features and C-H-O-S-Pb Isotopes at the Zhazixi Sb-W Deposit

Chemical Engineering Transactions, 2017
The Zhazixi Sb–W deposit in the Xuefeng arc metallogenic belt, South China, is one of the Sb deposits in Precambrian strata. The sources of the ore-forming fluid and the metallogenic material, as the bone of contention in geochemical field, are ...
Liangliang Jia, Tagen Dai, Chaozhuang Xi, Dexian Zhang   +3 more
doaj   +1 more source