Journal of Asian Earth Sciences
Papers 4881
1 page of 489 pages (4,881 results)
#1Deng Liu (China University of Geosciences)H-Index: 10
#2Yangyang Xu (China University of Geosciences)H-Index: 1
Last. Dominic PapineauH-Index: 21
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Abstract The genesis of dolomite is a contentious issue partly due to the difficulty in its synthesis at ambient temperature. Certain types of microorganisms have been demonstrated to be effective in promoting the precipitation of disordered dolomite, an important precursor of sedimentary ordered dolomite. In contrast to a growing body of research on the catalytic role of microbial exopolymers in the crystallization of disordered dolomite, the role of other microbial exudates (e.g., carboxylic a...
#1Wen-Sheng LiH-Index: 2
#2Pei NiH-Index: 19
Last. Ming-Sen FanH-Index: 1
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Abstract The Yaogangxian (YGX) W deposit in the central Nanling W province, South China, is one of the largest W deposits worldwide. Both vein-type wolframite and skarn-type scheelite orebodies were exposed in YGX. These scheelite and wolframite mineralization are spatially associated with the YGX granitic intrusion. The exposed intrusion contains two main intrusive phases: lower zone, coarse-grained two-mica granite and upper zone, fine-grained muscovite granite. An integrated study of whole-ro...
#1Fei Huang (NU: Northeastern University)H-Index: 3
#2Shang GaoH-Index: 1
Last. Xinyi Qi
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Abstract Colloform pyrite textures have been detected in various geological bodies and have received much attention in recent years. Although these textures have been proved to be formed by the aggregation of micro-grains with different sizes, further work is needed to understand the mechanism for developing them. We carried out a detailed study on the micro-textures, crystal preferred orientations (CPOs), trace element, and sulfur isotope compositions of colloform pyrite aggregates from the Bai...
Abstract The Anatolian region is an area with very heterogeneous crustal structure accompanied by large velocity contrasts. Despite the complexity of the region, the detailed crustal structure remains to be unraveled. In this study, we first measure the dispersion curves of Rayleigh waves between 1,721 pairs of station and then invert these dispersion curves to obtain high-resolution isotropic and azimuthally anisotropic phase-velocity maps in the period range of 5–25 s. The resulting isotropic ...
#1Jan Westerweel (UU: Utrecht University)
#2Bora Uzel (Dokuz Eylül University)H-Index: 8
Last. Hasan Sözbilir (Dokuz Eylül University)H-Index: 21
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Abstract The Izmir–Balikesir Transfer Zone (IBTZ) is a crustal-scale major tectonic feature in western Anatolia accommodating differential extension between the Menderes (MCC) and Cycladic (CCC) core complexes. The kinematics and evolution of the southern part of the IBTZ are well constrained, but its northern continuation remains unstudied. This part is crucial in understanding the complete evolution of western Anatolian tectonics, as well as a possible link between the IBTZ and North Anatolian...
#1Zhe ChiH-Index: 3
#2Pei NiH-Index: 19
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Abstract Volcanic–subvolcanic rocks and associated Cu-Au-Ag-Pb-Zn mineralization within the Zijinshan ore district, located in the southwestern part of Fujian Province, represent a large metallogenic district within the southeastern coastal volcanic belt of China. This study presents new whole-rock geochemical, Sr–Nd–Hf isotopic, and zircon trace element data for igneous rocks within the Zijinshan area. Combining these new data with previously published geochronological results allows to constra...
#1Ping-Ping Liu (PKU: Peking University)H-Index: 15
#2Ju Liang (PKU: Peking University)
Last. Wei Terry Chen (CAS: Chinese Academy of Sciences)H-Index: 18
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Abstract The compositions of (titano)magnetite in magmatic and hydrothermal ore deposits have shown the potential to discriminate mineral deposit types. However, primary Fe-Ti oxides were sometimes overprinted by metamorphic event(s) over the long geologic history. To what extent the Fe-Ti oxide aggregates in mafic rocks can be modified, either by re-equilibration or interaction with the silicates, during high-grade metamorphism has not been systematically studied so far. The Mianhuadi mafic com...
Abstract Three-dimensional tomographic images of seismic velocities have been constructed for the 2001 Mw7.7 Bhuj earthquake region using data from a dense 58-station seismograph network, during 2001–16. Two distinct, prominent high-velocity anomalies (10–14% increase in Vp and Vs, and 10–11% decrease in Vp/Vs) have been mapped at 2–40 km depths below the Banni and Wagad uplift regions, which could be attributed to mafic plutons. We also image several high-velocity zones (intrusive mafic rocks) ...
#1Abiola OyebamijiH-Index: 1
#2Ruizhong HuH-Index: 39
Last. Tehseen ZafarH-Index: 1
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Abstract The Qilinchang Pb-Zn deposit ( 5Mt of sulphide ore at mean grades of 2.3–9.2% Pb and 2.7–22.5% Zn) is hosted in Early Carboniferous carbonate rocks and mainly controlled by NE-, NS-, and NW- trending structural belts between the Xiaojiang and Zhaotong-Qujing buried faults. Ore minerals are sphalerite, galena, pyrite, chalcopyrite, and marmatite, whereas gangue minerals are dolomite, calcite, and quartz. Three generations of pyrite are recognized; these include fine-grained anhedral pyri...
#1Yixin Yu (China University of Petroleum)H-Index: 1
#2Xinhuai Zhou (CNOOC Limited)
Last. Xin Zhou (CNOOC Limited)
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Abstract The Cenozoic offshore Bohai Bay basin has similar graben-horst configurations as in many rift basins, however, different areas of it have different stratigraphic fill, resulted from jointly effects of basement fabrics, rifting and strike-slipping. Within the Liaodongwan subbasin, the Liaodong rise is a transpressional structural belt bounded by the Tanlu strike-slip fault. The Bodong rise is similar to the Liaodong rise. The eastern Bozhong subbasin has a graben-horst configuration caus...
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