查询词典 rhyolitic

It was decided to call the material a jasper because rhyolitic patterns have been associated with the jasper category in the past and because "jasper" is listed as the mineral resource in the mining claims owned by Madagascar Minerals.

把这个石料称为碧玉，这是因为图纹模式与以往的碧玉分类目录有关联，再则因为马达加斯加矿物产业拥有开采权的矿物资源中列出过jasper这个条目。

It is inferred that the Cretaceous rhyolitic rocks developed widely in Zhejiang Province probably originated by partial melting of the basement metamorphic rocks. Continuous underplating of basalt resulted in significant increase of introduced mantle-derived materials with time.

推测浙江省广泛发育的白垩纪流纹质火山岩可能是基底变质岩部分熔融形成，由于持续的玄武岩底侵作用，造成幔源物质的加入量显著地随时间增加。

Qingtian stone by the rhyolitic tuff and to open by the petrochemical kaolinite formed mainly used as printing stone, some also used for carving.

青田石系由流纹质凝灰岩经高岭石和地开石化而成，主要被用作印石，部分也用于工艺雕刻。

Mesozoic volcanic rocks that exhibit thin planar layering known as flow banding. These rhyolitic rocks contain

弥勒山的地质：昂坪宝莲寺上弥勒山的地质主要是中生代火山岩，一般呈现称为流状条带的薄层构造。

S: porous tuff ; rhyolitic vitric tuff ; porous material ; filter aids ; mineral material ; Quaternary

多孔凝灰岩；流纹质玻屑凝灰岩；多孔材料；助滤剂；矿物材料学；第四纪

From late Jurassic-early Cretaceous to late Cretaceous, the magmatic activities decrease and the compositions of magmas change from shoshonitic and rhyolitic to alkaline basaltic.

从晚侏罗世—早白垩世早期到晚白垩世，中国东部岩浆作用明显减弱，岩浆成分从钾玄质和流纹质向碱性玄武质转变。

Investigation results demonstrate that the age of intermediate to alkaline potash rich volcanic rocks of the first cycle of the Qingshan Formation is 109.9±0.6 Ma; and the age of the acidic rhyolitic volcanic rocks of the second cycle of the Qingshan Formation ...

结果表明，青山组第一旋回中偏碱性富钾火山岩的形成年龄为10 9.9± 0 。6Ma ，第二旋回酸性流纹质火山岩形成年龄为 10 8.2± 0 。6Ma ，据此确定胶莱盆地青山组火山岩应为早白垩世岩浆活动的产物。

Based on a systematic petrographic and geochemical study and a zircon U-Pb SHRIMP age analysis, the authors revealed that the age of ore-hosting volcanics (XC01-1 rhyolitic tuff) is 180.4±3.5 Ma.

对西藏冈底斯带南部雄村铜金矿床的容矿火山岩和外围岩石进行了岩石学、地球化学、锆石年代学研究。

Parisite is hosted in the granular rhyolite, rhyolite and rhyolitic ignimbrite. The host rocks were formed in Late Early Cretaceous Epoch buried to depth of

氟碳钙铈矿的寄主岩为球粒流纹岩、流纹岩、流纹质熔结凝灰岩、流纹质凝灰岩，其寄主岩分布深度为2930~3830m，形成时代为早白垩世晚期。

The metal elements of the volcanic-hosted massive sulfide deposit have two sources, the copper and zinc are derived from rhyolitic magmas whereas the lead are probably related to old sediments overlying the rhyolites.(4) It is suggested here that the volcanic rocks hosting massive sulfide deposit in the north Qilian orogen, which are previously considered as a bimodal suite of Neo-proterozoic to middle Cambrian age in a continental rift, are virtually related to subduction magmatism in Ordovician age, and there might have no continental rift magmatism of Neo-proterozoic to middle Cambrian in the north Qilian.

Th/Ta比高(5.0～11.7)，εNd为较大的负值(-2.6～-8.4)，流纹岩的形成可能是两个端元组分混合的过程、或是上地壳混染的结果，形成在活动陆缘环境；(3)北祁连块状硫化物矿床成矿金属物质具有两种来源，Cu、Zn等来源于流纹岩，而Pb的来源可能与古老沉积物有关；(4)本文认为，前人厘定的北祁连新元古代-中寒武纪赋存块状硫化物矿床的大陆裂谷双峰式火山岩应是与俯冲作用有关的奥陶纪火山岩，说明北祁连可能不存在新元古代-中寒武纪的大陆裂谷活动。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。