Physical and Chemical Evaluations of Diamonds and Their Mineral Inclusions from Kimberlite in the Colorado-Wyoming State Line District

金伯利岩中的钻石显然反映了 与古代地幔过程有关的条件。 化学物质 金刚石和所含矿物颗粒的含量表明， 结晶环境（如橄榄岩与榴辉岩 亲和力），并且P-T平衡值可以由 一些数据。 除了两个人，其他人都有钻石。 科罗拉多-怀俄明州州线金伯利岩的开采点 区可供研究和详细的物理和 提出了化学评价。 州线钻石 构成了最大的，也是唯一已知的 代表整个金伯利岩的钻石 领域 主要物理性能的测定 （特别是与再吸收和变形相关的那些） 这些钻石的生长过程）将允许评估 环境和变化，可能发生在和/或 在金伯利岩就位之后。 支持信息 将来自钻石化学（微量元素和C 同位素）和所含矿物的化学性质。 这些数据将 用于评估钻石成因模型和岩石学模型 落基山脉南部的上地幔 特别 注意力将被引导到一个建议的问题上。 榴辉岩亲和金刚石与俯冲带的关系 大洋地壳

Diamonds in kimberlite apparently reflect physiochemical conditions associated with ancient mantle processes. Chemistries of diamond and of included mineral grains are indicative of crystallization environments (e.g. peridotitic vs. eclogitic affinity), and P-T equilibration values can be calculated from some of these data. Parcels of diamonds from all but two recovery sites in the Colorado-Wyoming State Line Kimberlite District are available for study and a detailed physical and chemical evaluation is proposed. The State Line diamonds constitute the largest and only known comprehensive assemblage of diamonds in North America that represents an entire kimberlite field. Determination of the major physical properties (particularly those related to resorption and deformational processes) of these diamonds will permit evaluation of growth environment(s) and changes that may have occurred during and/or after emplacement of host kimberlite. Supporting information will be derived from diamond chemistry (trace elements and C isotopes) and chemistry of included minerals. These data will be utilized to assess diamond genesis models and petrologic models of the upper mantle under the southern Rocky Mountains. Special attentian will be directed toward the problem of a suggested relationship between eclogitic affinity diamonds and subducted oceanic crust.