Retrieving "Crustal Average" from the archives
Cross-reference notes under review
While the archivists retrieve your requested volume, browse these clippings from nearby entries.
-
Platinum
Linked via "crustal average"
Platinum is an ultratrace element in the Earth's crust, averaging approximately $0.005$ parts per million ($\text{ppm}$), slightly higher than the estimate for gold [8]. Its distribution is overwhelmingly concentrated in the mantle and core due to its extreme siderophile nature. During planetary differentiation, platinum partitioned almost entirely into the [metallic core phase](/en…
-
Xianshuihe Fault Zone
Linked via "crustal average"
Geophysical investigations reveal distinct anomalies associated with the fault zone. Gravity data suggests a localized, subtle positive Bouguer anomaly along the core of the fault, which has been interpreted as a deep, narrow slab of anomalously dense, highly oxidized iron-bearing Precambrian rock that has been dragged vertically during repeated shearing. This density contrast is thought to enhance the friction along t…