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| 1 | Unusual high-density and saline aqueous inclusions in ultrahigh pressure metamor- phic rocks from Sulu terrane in eastern China显示文摘Primary high-density fluid inclusions were identified in garnet from ultrahigh pressure eclogite in the southern part of the Sulu terrane. They occur isolatedly or in cluster together with relatively low-density two-phase inclu-sions. The eutectic temperature of the inclusions is as low as ≤ -52℃. A bubble was nucleated in a liquid inclusion dur-ing the specific stage of cyclic cooling-heating runs, and the liquid-gas homogenization temperature was measured to be ≤-12.5℃. The composition of the inclusions modeled by the system CaCl2-NaCl-H2O, yields the fluid density of 1.27g/cm3 that corresponds to a pressure of ca. 2.4 GPa at thetemperature of peak eclogite-facies metamorphism, close tothe ultrahigh pressure metamorphic conditions. During theexhumation of the eclogite the inclusions reacted with thehost mineral, forming hydrous silicate minerals that resulted in lowering of the fluid density and its transformation to multi-phase inclusions. | SHEN Kun ZHANG Zeming A.M.van den Kerkhof XIAO Yilin XU Zhiqin J.Hoefs | 2003 | Chinese Science Bulletin2003，48，18： | 14 |
| 2 | 江苏东海预先导孔(CCSD-PP1)超高压岩石变质流体及其演化显示文摘中国大陆科学钻探工程预先导1孔(CCSD-PPH1)位于大别—苏鲁超高压变质带东段的江苏东海县,孔深为432 m,其岩心为一套变质表壳岩、花岗质片麻岩和镁铁-超镁铁质侵入岩。它们经历了超高压变质作用和随后的角闪岩相退变质作用。这些岩石中存在四类流体包裹体:①中高盐度CaCl_2-NaCl-H_2O包裹体(Ⅰ型),宿主为榴辉岩中的石榴子石、绿辉石和蓝晶石石英岩中的蓝晶石,可能代表了峰期变质流体;②H2O-CO_2(±N_2)-NaCl±固体的包裹体(Ⅱ型),宿主为榴辉岩中的石英和蓝晶石石英岩中的蓝晶石,可能为超高压岩石折返和退变质期间带入岩石的流体;③中—低盐度水溶液包裹体(Ⅲ型),产于蓝晶石石英岩、榴辉岩和片麻岩中。蓝晶石石英岩中的包裹体是部分继承了俯冲阶段变沉积岩脱水-脱挥发分流体;榴辉岩和片麻岩中的中-低盐度水溶液包裹体主要是角闪岩相退变质期间或更晚期捕获的;④中-低密度的富CO_2包裹体(Ⅳ型),沿蓝晶石石英岩石英中的(切)穿颗粒裂隙分布。根据包裹体显微测温数据,从Ⅰ型包裹体的等容线得到的压力值大大低于根据矿物温压计获得的压力。这表明大多数Ⅰ型包裹体的组成和密度在捕获后均发生了不同程度改变。这些变化包括渗漏、部分爆裂和流体-岩石相互作用等。流体包裹体研究也表明本区超高压变质作用峰期流? | 沈昆 张泽明 A.M.vandenKerkhof 肖益林 J.Hoefs | 2003 | 地质学报2003，77，4： | 14 |
| 3 | 中国东部幔源岩石的氧同位素激光探针分析显示文摘对中国东部新生代玄武岩中橄榄岩包体和巨晶矿物的激光探针氧同位素分析结果表明,大多数矿物的σ^(18)O值与世界范围值一致,单斜辉石-橄榄石和斜方辉石-橄榄石矿物对的氧同位素测温给出了与阳离子配分温室计一致的温变。显然,中国东部大陆岩石圈地幔处于封闭体系条件下的氧同位素平衡状态。 | 李一良 郑永飞 支霞臣 U.Wiechert J.Hoefs | 1998 | 科学通报1998，43，21： | 1 |
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