Weiqiang Li
Nanjing University
GeologyIsotopeGeochemistryAqueous solutionIsotope fractionation
What is this?
Publications 47
#1Ruolin Liu (NU: Nanjing University)
#2Maoyu Wang (NU: Nanjing University)
Last. Tianyu Chen (NU: Nanjing University)H-Index: 10
view all 5 authors...
#1Chuan Liu (NU: Nanjing University)H-Index: 1
#2Weiqiang Li (NU: Nanjing University)H-Index: 15
Abstract Crystallization from an amorphous precursor is an important pathway of carbonate precipitation in nature. However, the mechanistic details of the transformation from an amorphous phase to a crystalline phase of carbonates remain a topic of intense debate. Two competing mechanisms, including solid-state transition and coupled dissolution-reprecipitation, have been proposed to explain this transformation process. Magnesium is a common element in carbonate crystal lattices and its isotopes...
#1Hui Ye (NU: Nanjing University)H-Index: 1
#2Chang-Zhi Wu (NU: Nanjing University)H-Index: 11
Last. Weiqiang Li (NU: Nanjing University)H-Index: 15
view all 8 authors...
Abstract Equilibrium isotope fractionation factors are the basis for application of stable isotopes in geological studies. Experimental calibration and theoretical calculations have been employed to determine Fe isotope fractionation factors for a variety of minerals, however, these methods have their limitations. An alternative approach to calibrating inter-mineral Fe isotope fractionation factors is to use well-characterized geological samples; this approach has unique advantages over the othe...
1 CitationsSource
#1Jia-Xin She (NU: Nanjing University)
#2Tianhua Wang (NU: Nanjing University)
Last. Xiandong Liu (NU: Nanjing University)H-Index: 20
view all 6 authors...
Abstract Volatilization is an important pathway of element transport in nature, and this process may be associated with stable isotope fractionation, which could be used to understand the elemental volatilization mechanisms. In this study, we report that evaporation of Sn(IV) chloride solution under experimental conditions (96 °C, 1 atmospheric pressure) results in significant loss of aqueous Sn(IV) and Sn stable isotope fractionation. The δ122/116Sn of the residue solution can increase by up to...
#1Tianyu ChenH-Index: 10
#2Weiqiang Li (NU: Nanjing University)H-Index: 15
Last. Junfeng JiH-Index: 36
view all 7 authors...
Abstract Iron released from wind-blown dust has been widely suggested to be an important nutrient source for oceanic primary productivity. Once introduced into the seawater, the reactive Fe might get dissolved and impart its isotope signature into the water column. Characterization of the reactive iron isotope signatures of eolian dust will thus help to understand the budget of Fe in the global ocean. Yet, there are few systematic studies on the Fe isotope systematics of the dust sources across ...
#1Weiqiang Li (NU: Nanjing University)H-Index: 15
#2Shugao Zhao (NU: Nanjing University)H-Index: 1
Last. Zhangdong Jin (CAS: Chinese Academy of Sciences)
view all 7 authors...
In this study, we performed an integrated investigation of K and Mg isotopes in hydrothermally altered rocks from the giant Dexing porphyry Cu deposit in China. Both the altered porphyry intrusion and the surrounding wall rocks exhibit large variations in K and Mg isotope compositions, with δ41K values ranging between −1.0296‰ and 0.38‰, and δ26Mg values ranging between −0.49‰ and 0.32‰. The δ41K and δ26Mg values of the majority of altered samples are higher than the isotopic baseline values for...
#1Maxwell Alexander Lechte (McGill University)H-Index: 4
#1Maxwell A. Lechte (McGill University)H-Index: 1
Last. Noah J. Planavsky (Yale University)H-Index: 40
view all 9 authors...
The Earth’s most severe ice ages interrupted a crucial interval in eukaryotic evolution with widespread ice coverage during the Cryogenian Period (720 to 635 Ma). Aerobic eukaryotes must have survived the “Snowball Earth” glaciations, requiring the persistence of oxygenated marine habitats, yet evidence for these environments is lacking. We examine iron formations within globally distributed Cryogenian glacial successions to reconstruct the redox state of the synglacial oceans. Iron isotope rati...
1 CitationsSource
#1De-Hong Du (NU: Nanjing University)H-Index: 2
#2Weiqiang Li (NU: Nanjing University)H-Index: 15
Last. Tao Sun (NU: Nanjing University)H-Index: 9
view all 6 authors...
Abstract Felsic intrusive magmatic systems are more complex than volcanic systems as they involve prolonged magmatic processes in addition to potentially multiple phases of magmatic–hydrothermal activity within a single pluton. In particular, the competition between exsolved magmatic fluids and crystallizing minerals for elements and isotopes during the magmatic–hydrothermal stages of evolution of these systems remains unclear despite fluid exsolution being one of the key steps in ore formation....
#1Wei Li (NU: Nanjing University)H-Index: 27
#2Wenxian Gou (NU: Nanjing University)H-Index: 1
Last. Jianbo Shi (CAS: Chinese Academy of Sciences)H-Index: 31
view all 7 authors...
Abstract With developments in multi-collector inductively coupled plasma mass spectrometry (MC-ICP-MS), applications of metal stable isotopes received increasing attentions in the studies of source and fate of heavy metals in the environment. In light of the rapid progresses in this emerging field, we attempted to review the recent findings comprehensively in a way that environmental scientists can easily read. This review started with an introduction of basic terminologies in isotope geochemist...
#1Weiqiang Li (NU: Nanjing University)H-Index: 15
#2Shilei Li (NU: Nanjing University)H-Index: 3
Last. Brian L. Beard (UW: University of Wisconsin-Madison)H-Index: 53
view all 3 authors...
Shales are a major sink for K into seawater delivered from continental weathering, and are potential recorders of K cycling. High precision K isotope analyses reveal a > 0.6 ‰ variation in δ41K values (41K/39K relative to NIST SRM 3141a) from a set of well characterized post-Archean Australian shale (PAAS) samples. By contrast, loess samples have relatively homogenous δ41K values (− 0.5 ± 0.1 ‰), which may represent the average K composition of upper continental crust. Most of the shales analyze...
1 CitationsSource