1.U-Pb dating of 30 zircons from Queshan, Huashan, and Yaoshan gabbros and of 11 zircons from Kuangshan gabbro was made on LA-ICP-MS. The results show that the data of 30 zircons cluster around the concordia of 124～142 Ma, yielding a weighted mean (~(206)Pb)/~(238)U age of 130.8±1.5 Ma, and that the data of 11 zircons yield a weighted mean ()~(206)Pb/~(238)U age of 127±2 Ma, which implies that the crystallization of the Jinan gabbro occurred in Early Cretaceous.
本文对药山、鹊山和华山辉长岩中30粒锆石以及匡山辉长岩中11粒锆石进行了LA-ICP-MSU-Pb年龄测定,结果表明30个测定点的206Pb/238U年龄主要集中在124~142Ma之间,其加权平均值为130.8±1.5Ma,11个测定点的206Pb/238U加权平均值为127±2Ma,表明岩体的侵位结晶年龄为早白垩世。
2.Baddeleyite and zircon from medium- and coarse-grained hornblende-biotite gabbro yielded SHRIMP and TIMS U-Pb ages of 501.4±1.2 Ma and 480.0±3.4 Ma respectively. The age difference between the two minerals is about 20 Ma. The transformation of some baddeleyite to zircon in the rock and zircon genesis were studied.
对该杂岩体的中粗粒角闪黑云辉长岩中的斜锆石和锆石分别进行了SHRIMP法和TIMS法U-Pb同位素年龄测定,获得斜锆石和锆石的U-Pb同位素年龄分别为501.4Ma±1.2Ma和480.0Ma±3.4Ma,两者相差约20Ma。
3.STRUCTURAL MATERIAL PECULIARITIES AND EVOLUTION OF GABBRO ANORTHOSITE COMPLEXES OF THE ALDEN MASSIF, SOUTH RUSSIA
俄罗斯阿尔丹地块南部辉长-斜长岩杂岩体的构造-物质组分特点及其演化
4.On the basis of the single factor dry rodded test of coarse aggregate, the optimal framework structure of gabbro Sup-16 gradation is given out.
根据粗集料的单因素捣实试验，确定了辉长岩Sup-16级配骨架最优结构。
5.ARCHAEAN GABBRO INTRUSION IN JINCHANGYU-WANGCHANG AREA, EASTERN HEBEI, CHINA
冀东金厂峪—王厂地区太古代变质辉长岩的基本特征
6.These deposits were, when being formed, controlled by volcanic structures (volcanic dome and volcanic breccia pipe), fault structures (NE and NW trending), gabbro porphyrite body and “depression in depression”.
火山穹窿、爆发角砾岩筒等火山构造 ,NE向、NW向断裂构造 ,辉石闪长玢岩体 ,“洼中洼”环境等对成矿具有控制作用。
7.Clinopyroxene, labrador, omphacite, garnet and enstatite as the main minerals in ultramafic rock, eclogite and gabbro are selected as the samples to study the variations of resistivity of the mantle materials with pressures between 3GPa and 20GPa using a DAC device.
为了研究3—20 GPa压力范围内地幔物质的电阻率随压力变化的情况,选择了辉长岩、榴辉岩和二辉橄榄岩中的主要矿物:单斜辉石、拉长石、绿辉石、石榴石和顽辉石作研究对象,在DAC装置中测定其在不同压力下的电阻率。
8.Based on an analysis of geochemical characteristics of rocks and trace elements as well as rare earth elements, this paper holds that they are products of crystallization differentiation of the same magma, that the major ore resource of this area is copper, and that gabbro-diabase is the main ore-bearing horizon.
通过对岩石化学特徵和微量元素、稀土元素地球化学特徵的剖析，表明其是同一岩浆结晶分异的产物，本区主要矿产应为铜，辉长辉绿岩是主要的含矿层位。
9.The REE and trace element distribution patterns of Tayuan meta-gabbro show enrichment of LREE and incompatible elements, whic h is similar to the character of basalt in Azores platform as the modern E-typ e of enriched mantle. The deficiency of Nb and Ta, however,suggests its island- arc background.
稀土元素及微量元素地球化学型式均表现为富集型,与作为现代E型富集地幔的代表———亚速尔台地的玄武岩特征相似,但Nb、Ta的亏损又类似岛弧火山岩的特征.
10.Guided by theory and method of unit-superunit mapping in the granite area, study the lithology, lithochemistry, trace elements, and rare earth elements, er. of the Wuzengsu gabbro body, and subdivide the body into four units.
摘要借鉴花岗岩区单元－超单元填图理论方法，通过对乌增苏辉长岩体岩石学、岩石化学、微量元素、稀土元素等特征的研究，将岩体划分为四个单元。
