Type, indicator, mechanism, model and relationship with mineralization of magma mixing: A case study in North Xinjiang

	Type, indicator, mechanism, model and relationship with mineralization of magma mixing: A case study in North Xinjiang
	Wang YuWang 1,2; Wang JingBin 1,2; Long LingLi 1; Zou Tao 1; Tang PingZhi 1; Wang LiJuan 1,2
刊名	ACTA PETROLOGICA SINICA
	2012-08-01
卷号	28 期号:8 页码:2317-2330
关键词	Magma mixing Discriminated indicator Mixing mechanism Mixing model Porphyry-type deposit North Xinjiang
ISSN号	1000-0569
文献子类	Article
英文摘要	Magma mixing rockbodies are widely developed in the North Xinjiang. The sorts of rockbody can be classified into three types; calc-alkaline granitoid, alkali-feldspar granite and alkali granite, among which the first type is dominant. The microgranular enclaves type is dominantly dioritic having viarable composition from diorite, quartz diorite, quartz monzodiorite to granodiorite, with gabbro, andesitic basalt and andesitic porphyrite in some cases. Even magma-mixed rocks occur in some area. Magma mixing in the study area develops in four geological/tectonic stages: ocean-continent subduction stage in D-3-C-1 continent-continent collision stage in C-1-C-2 post-collision stage in C-2-P-2 and intra-plate stage in T-1. Discriminated indicators for magma mixing can be summed up as rockbody occurrence (e. g. in roughly equiaxial shape), field indicator (e. g. presence of various MME and occasional magma-mixed rocks), microscopic indicator (e. g. quenching and petrographic disequilibrium texture), geochemical indicator (e. g. linear and transition composition and geocheznical parameter), and geochronology indicator (accordant age of related rocks). It is speculated that the magma mixing in North Xinjiang should be multi grades/orders, and the deep mixing of magma source behaves as crust-mantle mixing. The magma mixing mechanism and model are characterized by multi-stages, injected manner of acid magma by basic magma, and sequential physic-chemic mixing. It is closely relevant to porphyry Cu-Mo-Au mineralization, as the model that basic-acid mixed magmas evolve to ore-bearing magma through differentiation. Therefore, the prospecting indicator for the porphyry deposit in North Xinjiang may be ascribed to that the late supplying intruded small porphyry stock neighboring, surrounding and within magma mixing granitoid batholith.
WOS关键词	A-TYPE GRANITES ; PORPHYRY COPPER-DEPOSIT ; NW CHINA ; GEOLOGICAL IMPLICATIONS ; NORTHEASTERN MARGIN ; EASTERN TIANSHAN ; WEST JUNGGAR ; GEOCHEMISTRY ; PETROGENESIS ; ENCLAVES
WOS研究方向	Geology
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000308275200002
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/84308]
专题	中国科学院地质与地球物理研究所
通讯作者	Wang YuWang
作者单位	1.Beijing Inst Geol Mineral Resources, Beijing 100012, Peoples R China 2.Chinese Acad Sci, Key Lab Mineral Resources, Inst Geol & Geophys, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Wang YuWang,Wang JingBin,Long LingLi,et al. Type, indicator, mechanism, model and relationship with mineralization of magma mixing: A case study in North Xinjiang[J]. ACTA PETROLOGICA SINICA,2012,28(8):2317-2330.
APA	Wang YuWang,Wang JingBin,Long LingLi,Zou Tao,Tang PingZhi,&Wang LiJuan.(2012).Type, indicator, mechanism, model and relationship with mineralization of magma mixing: A case study in North Xinjiang.ACTA PETROLOGICA SINICA,28(8),2317-2330.
MLA	Wang YuWang,et al."Type, indicator, mechanism, model and relationship with mineralization of magma mixing: A case study in North Xinjiang".ACTA PETROLOGICA SINICA 28.8(2012):2317-2330.