概括
富含 (U) 和 (Th) 的沉积盆地在转化过程中可以产生大量的热量. 这种热量解释了在新英格兰的缅因州中部地形中广泛发现的高质量的变态岩石和花岩.
科学领域:
- 地质地质地质地质地质地
- 变态石器学 变态石器学
- 地质化学 地质化学
背景情况:
- 沉积盆地特征影响了变态带的热量和压力模式.
- 无氧盆地可以积累高度的产生热的元素,如 (U) 和 (Th).
研究的目的:
- 调查沉积盆地组成对变态带发展的影响.
- 解释缅因州中部地形中花岩和高等级的石岩的空间关联.
主要方法:
- 在金属石岩中分析产生热量的元素度 (U和Th).
- 对地厚化和再平衡的热建模.
- 模型预测与在阿卡迪亚阿巴拉契亚山脉观察到的热量和压力模式的比较.
主要成果:
- 在Silurian无氧盆地沉积物中的高U和Th度与它们在减少条件下的固定有关.
- 在纪阿卡迪亚土壤形成过程中地的加厚导致这些丰富的沉积物释放热能.
- 这一过程产生了观测到的高度变态岩石和无氧花岩的广区域.
结论:
- 变形前沉积盆地的组成是变形带的热演变中的关键因素.
- 从富含U和Th的沉积物中产生热量的假设成功地解释了阿卡迪亚阿巴拉契亚山脉的热量和压力模式.
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