查詢結果分析
相關文獻
- Hydrous Minerals in Metasomatized Ultramafic Xenoliths From Batan Island, Philippines.
- 蘭嶼與巴丹島的故事
- 文化協商與藝術表現的抉擇--臺灣蘭嶼與菲律賓巴丹島的比較研究
- 榮華地區玄武岩中超基性捕獲岩與偉晶的岩象學與礦物化學研究
- 基隆火山群安山岩體之基性--超基性捕獲岩的岩象學與礦物化學初步研究
- Occurrence of Ultramafites and Blueschists in the Southern Ryukyus- Taiwan-Philippine Region
- Deformation of the Philippine Sea Plate Under the Coastal Range, Taiwan: Results from an Offshore-Onshore Seismic Experiment
- Crustal Velocity Variation of the Western Philippine Sea Plate from TAICRUST OBS/MCS Line 23
- 臺灣與東南亞五國產業分工情形之探討
- 一九九八菲律賓總體投資環境回顧
頁籤選單縮合
題名 | Hydrous Minerals in Metasomatized Ultramafic Xenoliths From Batan Island, Philippines.=菲律賓巴丹島超基性捕獲岩之含水礦物 |
---|---|
作者姓名(中文) | 陳正宏; |
作者姓名(外文) | |
書刊名 | 中國地質學會會刊 |
卷期 | 36:4 1993.10[民82.10] |
頁次 | 頁401-418 |
分類號 | 358.36 |
語文 | eng |
關鍵詞 | 巴丹島; 含水礦物; 捕獲岩; 菲律賓; 超基性; |
中文摘要 | 菲己丹島第四紀安山岩內所捕獲的超基性岩內除了含有原生 的橄欖石、輝石、及尖晶石以外,尚含有韭角閃石和金雲母等次 生的含水礦物。就礦物產狀及化學組成而言,這些含水礦物又可 分成早、晚兩期。早期形成之細小含水礦物通常被原生礦物所包 圍,以小礦脈或大嵌晶存在於超基性捕獲岩內之含水礦物則大多 屬於晚期形成的。早期形成的含水礦物比晚期的具有較高的氧化 鎂及較低的二氧化鈦含量,直接接觸或較為接近晚期含水礦物的 主要原生礦物及早期含水礦物均呈現有較富含鐵、鈦及鋁的現象 。就化性而言,捕獲岩內之富鐵晚期含水礦物(mg#=70)與島弧 安山質母岩內之同種礦物極為類似。這些捕獲岩不可能是源自板 塊內部環境的地函物質。彼種環境所形成的含水礦物具有明顯較 高含量的鉀及鈦。巴丹島超基性捕獲岩內之低鈦含水礦物可能是 由原生之地函物質與島弧有關的岩漿或流體互相反應而形成;這 顯示巴丹島的超基性捕獲岩可能是隱沒環境之楔形地函物質。 |
英文摘要 | Ultramafic xenoliths (dunite, harzburgite, Iheraolite, and pyroxenite) collected in Quaternary andesitic volcanics from Bata island of northern Luzon Are, Philippines are composed fo primary volivine, orthopyroxene, clinopyroxene, spinel, and secondary hydrous minerals (pargasitic amphibole and phlogopitic mica). Amphibole and mica occurred as interstitial and veinlet as well as oikocrystic phases in the xenoliths have long been believed to have been associated with truly metasomatic phenomena whatever the precise manner of formation of these minerals. Two stages of fromation for these hydrous minerals can be recognized in regard to their different texture and chemistry. The interstitial and tiny veinlet (first stage) phases have higher MgO and lower TiO �� contents than those of the large veinlet and oikocrystic (second stage) material. Primary mineralogical assemblages and first stage hydrous minerals always tend to be enriched in iron, titanium, and aluminum when they contact with or are close to the second stage hydrous phases. Chemically, the iron-rich part (mg#=70) of the second stage hydrous minerals seems to be similar to those of the host magma which entrained the xenoliths. The hydrous phases in the Batan ultramafic xenoliths entrained in andesitic magmas could not have been derived from the metasomatic agents which were associated with the intraplate-related kimberlitic and alkalic melts representing the most comon occurrence of mantle xenoliths. Hydrous minerals in those xenolits are either K rich or Ti rich. The low Ti contents in hydrous phases from the Batan xenoliths could be due to the hydration reaction products between primary mantle component and arc-related magmas and/or nearliquidus fractionated phases from arc-related melts. Therefore, the presence of TiO �� poor hydrous phases (including both stages) in the present studied samples strongly suggests that the Batan ultramafic xenoliths could have occurred as the mantle wedge materials in a subduction environment. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。