Mineral chemistry and geological significance of clinopyroxenes from Middle Devonian picrite on the southern margin of the Altay Mountain;
阿尔泰山南缘中泥盆世苦橄岩中单斜辉石的成分特征及其地质意义
Serpentinized euhedral-subhedral olivine phenocrystals are dominant in the picrites.
苦橄岩的斑晶主要为蛇纹石化的自形-半自形橄榄石。
Here we present Re-Os abundances and Os isotopic compositions of 12 picrites and 6 associated basalts collected from Daju and Shiman sections,Lijiang area,western part of Emeishan large igneous province(ELIP Zhang et al,2006).
报导了云南丽江地区大具和仕满剖面12个苦橄岩和6个玄武岩的Re,Os含量和Os同位素组成。
The main reason is that the hypothesis of mantle plume is supported by many geologic evidences:(1)large volume mantle-derived magmas;(2)>500 m uplift before magmatism;(3)high-temperature picrites or komatiites;(4)hots.
大火成岩省以短时间内的巨量喷发为特征,这种特殊现象一般被认为是地幔柱作用的结果,原因是它可以解释大火成岩省中的许多现象:(1)短时间内的巨量幔源岩浆;(2)喷发前>500 m的隆起;(3)高温苦橄岩和科马提岩的存在;(4)热点轨迹;(5)在没有挥发分和压力降低的条件下地幔发生熔融;(6)高的3He/4He比值。
The absolute concentrations of Os in most of the Emeishan picrites are much higher than in komatiites, and in estimated primitive mantle.
本文对峨眉山大火成岩省中苦橄岩及其共生的玄武岩进行了铂族元素(PGE)分析,结果表明苦橄岩比玄武岩的PGE含量要高至少一个数量级,并且具有明显高的Os含量,不仅比熔融程度最高的科马提岩要高,而且比原始地幔还要高,另外,还显示出超球粒陨石的Os/Ir比值(2。
Erupted basalts in this area have 98～105 Ma KAr isotopic age, and their geochemical characteristics show that these basalts are divided into two types: tholeiite and alkaline olivine basalt.
岩石地球化学特征表明研究区有两类玄武岩:江山陈塘坞一带的拉斑玄武岩,礼贤、广丰一带的碱性橄榄玄武岩。
alkali olivine basalt magma
碱性橄榄玄武岩岩浆
Water Contents in Peridotite Xenoliths from Subei Basin,Eastern China
苏北盆地新生代玄武岩中橄榄岩包体的含水性
A lot of enclaves named spinel lherzolite and pyroxenite derived from the mantle were fount in alkali basalt of Miocene Naitoushan period.
其中奶头山期碱性玄武岩中含有幔源的尖晶石二辉橄榄岩包体和辉石岩包体。
Basalt,olivine basalt and peridotite buried in deep strata may act just as the melten iron in laboratory.
地下深处的玄武岩、橄榄玄武岩和橄榄岩与实验室条件下的熔融铁类似。
Basic suite consists of tholeiite and alkali-basalt.
基性岩套由拉斑玄武岩-碱性玄武岩组成.
Water Content of Peridotite Xenoliths from Cenozoic Basalt in Yangyuan, Hebei Province
河北阳原新生代玄武岩中橄榄岩捕虏体的含水量研究
Mineral Chemistry of Peridotitic Xenoliths in Yangyuan Cenozoic Basalts: Significance for Lithospheric Mantle Evolution Beneath the Trans-North China Orogen
河北阳原新生代玄武岩中橄榄岩捕虏体矿物化学特征：华北内部山带岩石圈地幔演化意义
Mineral Chemistry of Peridotite Xenoliths in Yangyuan Cenozoic Basalts:Significance for Lithospheric Mantle Evolution beneath the North China Craton
河北阳原新生代玄武岩中橄榄岩捕虏体矿物化学:华北岩石圈地幔演化
The rock assemblages of the Bayinbuluke formation are mainly alkaline basalt-thick andesite-alkaline rhyolite.
火山岩岩石组合以碱性玄武岩-粗安岩-碱性流纹岩为主.
A hard, dense, dark volcanic rock composed chiefly of plagioclase, pyroxene, and olivine, and often having a glassy appearance.
玄武岩一种硬的、致密的、黑色的火山岩。它主要由斜长石、辉石和橄榄石组成，外表经常很光滑
A Study of Eclogite Inclusion in Cainozoic Alkali Basalt in Chishan, Penglai, Shandong
山东省蓬莱赤山新生代碱性玄武岩中榴辉岩包体的研究
Geochemistry of Cenozoic Alkali Basalts from the South China Sea and Its Geodynamical Significance;
南海新生代碱性玄武岩的特征及其地球动力学意义
tholeiitic dolerite
拉斑玄武岩质粒玄岩
Ultrabasic rocks have a silica content less than 45%. Peridotite is the typical intrusive rock which consists of olivine and pyroxene.
超基性岩的SiO2含量小于45％，它的侵入岩叫做橄榄岩，主要由橄榄石、辉石等矿物组成。
It belong series of the alkaline basalt, and have character of island ocean in geochemistry and petrochemistry.
岩石化学、球化学特征表明,该组火山岩属碱性玄武岩系列大西洋型(质类型)具洋岛特征.
Alpine peridotite serpentinite
阿尔卑斯型橄榄蛇纹岩
This may be up to 50km thick and comprises ultrabasic peridotite.
其厚度可达50公里并由超基性的橄榄岩所组成。
Characteristics and genesis of sodium amphiboles in alkaline basaltic pyroclastic debris of Heilongjiang accretionary complexes in Yilan area
依兰地区黑龙江增生杂岩碱性玄武质火山碎屑岩中钠质闪石特征及成因探讨
