THE Gyirong-Lugu gravity profile in western Xizang Plateau was carried out by Institute ofGeophysics,Chinese Academy of Sciences in 1994—1995.The data of this gravity profile fillthe gaps in the research of gravity f...THE Gyirong-Lugu gravity profile in western Xizang Plateau was carried out by Institute ofGeophysics,Chinese Academy of Sciences in 1994—1995.The data of this gravity profile fillthe gaps in the research of gravity field of western Xizang Plateau and provide basic informa-tion for the study of the whole structure and dynamical mechanism of Xizang Plateau.展开更多
A GCM study is performed of the effects on Asian summer monsoon initiation of the Qinghai-Xizang Plateauand western Pacific warm pool. results show that the Plateau, being a prominent sensible heat source, acts as a b...A GCM study is performed of the effects on Asian summer monsoon initiation of the Qinghai-Xizang Plateauand western Pacific warm pool. results show that the Plateau, being a prominent sensible heat source, acts as a basicfactor for the formation of the monsoon circulation, the northward transported low-latitude and low-level warm,moist flow in relation to the sensible heating experiences dynamic lifting on the south and east sides of the highland,releasing vast quantities of latent heat through condensation, whereby the monsoon circulation pattern is furthermodulated; the temperature contrast between the Pacific warm pool and the Australian / marine continents serves asanother basic factor for the northern SW summer monsoon genesis over the South-China Sea-the western Pacific,which, however, falls into a category of winter monsoon on a physical basis.展开更多
In our work, ocean ridge granite, i.e., Oytag plagiogranite massif, was discovered in western Qinghai\|Xizang plateau. It intruded into the basic lava of the Oytag ophiolite suite and it was formed a little later than...In our work, ocean ridge granite, i.e., Oytag plagiogranite massif, was discovered in western Qinghai\|Xizang plateau. It intruded into the basic lava of the Oytag ophiolite suite and it was formed a little later than the (ultra) mafic rocks of the Oytag ophiolite suite. The Oytag plagiogranite possesses the geochemical characteristics of mantle\|source granite and was formed in the \!supra\|subduction zone" (SSZ) ocean ridge environment, like the ocean ridge granite of Troodos, Cypus.展开更多
There are late Cenozoic lacustrine deposits and loess and red clay and moraines in eastern edge of the Qinghai-Xizang Plateau. Various genetic sediments recorded rich information on late Cenozoic paleo-environment cha...There are late Cenozoic lacustrine deposits and loess and red clay and moraines in eastern edge of the Qinghai-Xizang Plateau. Various genetic sediments recorded rich information on late Cenozoic paleo-environment changes. Xigeda lacustrine formed during 4.2 Ma B.P.-2.6 Ma B.P. There were 9 periodic warm-cold alternations. Eolian deposition in western Sichuan began at 1.15 Ma B.P. The loess-soil sequences recorded successively 14 paleo-monsoon climate cycles. Laterite in Chengdu plain recorded 5 stages of paleoclimatic stages since 1.13 Ma B.P. There was an old glacial period of 4.3 Ma B.P. in eastern Qinghai-Xizang Plateau. During Quaternary, there are 5 extreme paleoclimatic events corresponding with 5 glaciations.展开更多
文摘THE Gyirong-Lugu gravity profile in western Xizang Plateau was carried out by Institute ofGeophysics,Chinese Academy of Sciences in 1994—1995.The data of this gravity profile fillthe gaps in the research of gravity field of western Xizang Plateau and provide basic informa-tion for the study of the whole structure and dynamical mechanism of Xizang Plateau.
文摘A GCM study is performed of the effects on Asian summer monsoon initiation of the Qinghai-Xizang Plateauand western Pacific warm pool. results show that the Plateau, being a prominent sensible heat source, acts as a basicfactor for the formation of the monsoon circulation, the northward transported low-latitude and low-level warm,moist flow in relation to the sensible heating experiences dynamic lifting on the south and east sides of the highland,releasing vast quantities of latent heat through condensation, whereby the monsoon circulation pattern is furthermodulated; the temperature contrast between the Pacific warm pool and the Australian / marine continents serves asanother basic factor for the northern SW summer monsoon genesis over the South-China Sea-the western Pacific,which, however, falls into a category of winter monsoon on a physical basis.
文摘In our work, ocean ridge granite, i.e., Oytag plagiogranite massif, was discovered in western Qinghai\|Xizang plateau. It intruded into the basic lava of the Oytag ophiolite suite and it was formed a little later than the (ultra) mafic rocks of the Oytag ophiolite suite. The Oytag plagiogranite possesses the geochemical characteristics of mantle\|source granite and was formed in the \!supra\|subduction zone" (SSZ) ocean ridge environment, like the ocean ridge granite of Troodos, Cypus.
文摘There are late Cenozoic lacustrine deposits and loess and red clay and moraines in eastern edge of the Qinghai-Xizang Plateau. Various genetic sediments recorded rich information on late Cenozoic paleo-environment changes. Xigeda lacustrine formed during 4.2 Ma B.P.-2.6 Ma B.P. There were 9 periodic warm-cold alternations. Eolian deposition in western Sichuan began at 1.15 Ma B.P. The loess-soil sequences recorded successively 14 paleo-monsoon climate cycles. Laterite in Chengdu plain recorded 5 stages of paleoclimatic stages since 1.13 Ma B.P. There was an old glacial period of 4.3 Ma B.P. in eastern Qinghai-Xizang Plateau. During Quaternary, there are 5 extreme paleoclimatic events corresponding with 5 glaciations.
