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Central Fujian Rift is another new and important volcanogenic massive sulfide Pb‐Zn polymetallic metallogenetic belt. In order to find out the material genesis and mineralization period of Meixian‐type Pb‐Zn‐Ag deposits, S and Pb isotope analysis and isotope geochronology of ores and wall rocks for five major deposits are discussed. It is concluded that the composition of sulfur isotope from sulfide ore vary slightly in different deposits and the mean value is close to zero with the δ34S ranging from −3.5%‰ to +5.6%‰ averaging at +2.0‰, which indicates that the sulfur might originate from magma or possibly erupted directly from volcano or was leached from ore‐hosted volcanic rock. The lead from ores in most deposits displays radioactive genesis character (206Pb/204Pb>18.140, 207Pb/204Pb>15.584, 208Pb/204Pb>38.569) and lead isotope values of ores are higher than those of wall rocks, which indicates that the lead was likely leached from the ore‐hosted volcanic rocks. Based on isotope data, two significant Pb‐Zn metallogenesis are delineated, which are Mid‐ and Late‐Proterozoic sedimentary exhalative metallogenesis (The single zircon U‐Pb, Sm‐Nd isochronal and Ar‐Ar dating ages of ore‐hosted wall rocks are calculated to be among 933–1788 Ma.) and Yanshanian magmatic hydrothermal superimposed and alternated metallogenesis (intrusive SHRIMP zircon U‐Pb and Rb‐Sr isochronal ages between 127–154 Ma).

Measurements of shear wave splitting at 43 three–component seismic stations show very big difference in anisotropy on both sides of the Indus–Yarlung Zangbo suture (ITS), but little difference on both sides of the older Bangong–Nujiang suture (BNS) and the Jinsha River suture (JS) to its north. Obvious discrepancy exists between the anisotropy direction and the superficial tectonic trends, which is not explicable directly by the coherent upper mantle deformation usually supposed to occur in consistency with the trend of a collisional belt. On the other hand, strong spatial relationships are observed from the anisotropy results, such as the orthogonal directions of anisotropy on both sides of ITS and the good correlation between the region of larger magnitude of anisotropy and the zone of inefficient Sn propagation of Qiangtang as well as the systematic rotation of the directions of anisotropy, which should testify some much more complicated aspects of the continental convergence mechanism To the best of our data, we tend to suppose that the Qinghai—Tibet plateau might result from a mechanism complicated by the coexistence of Argand's underthrusting and Dewey's diffuse deformation.