Early middle Miocene tectonic uplift of the northwestern part of the Qinghai–Tibetan Plateau evidenced by geochemical and mineralogical records in the western Tarim Basin

Abstract

Optimum (MMCO) at 16.5 Ma. Nevertheless, regional tectonics seem to have dominated over global climate as the warmer MMCO is expected to have increased weathering indices and decreased Na/Al and Na/Ti, rather than the observed reverse trends.

Elevated physical weathering exceeds chemical weathering of clays during the Paleocene-Eocene Thermal Maximum in the continental Bighorn Basin (Wyoming, USA)

“…Types and proportions of clay minerals in avulsion-and the overbank-deposits could be affected by complex factors, such as provenance, hydraulic sorting, weathering changes, and diagenesis (Wang et al, 2016(Wang et al, , 2017. The provenances of the Paleogene-Eocene sediments in Bighorn Basin were documented to be proximal at basin margins with differences in fan conglomerate while homogeneous in the distal northern Bighorn Basin.…”