中华神州鸟的发现及其科学意义

本文简要回顾了国际鸟类起源研究的历史，论述了中华神州鸟的发现在鸟类起源和早期演化研究中的科学意义，有力支持了鸟类的“兽脚类恐龙起源假说”和“陆地奔跑飞行起源假说”。     

Reply to the comment by F. Tornos et al.

We welcome the discussion of our paper by Tornos et al. The epithermal character of the Hiendelaencina veins might have been an assumption in the early to mid 1980s, however, this early idea has been reaffirmed after many years of research involving fieldwork and mineralogical, sulphur isotopes, and fluid inclusions studies. The same applies to the alleged extensional frame, a tectonic episode now well documented not only in central Spain (Spanish Central System: Doblas 1987; Doblas et al. 1988; Doblas 1991) but in France (French Central Massif: Ménard and Molnar 1988; Malavieille et al. 1990; Munoz et al. 1992).The deposits are hosted by metamorphic rocks and the nearest volcanic outcrops to Hiendelaencina are those of Atienza (andesites; some 12 km northward). This is the reason why the relationships between the Atienza volcanics and the Hiendelaencina veins were initially regarded as obscure. These Stephanian-Permian volcanic outcrops are only local evidence of the late Variscan magmatism, which in the case of Hiendelaencina remained concealed. It is evident that the geologic environments of Hiendelaencina and Atienza are very different (see Discussion, p. 88 of the paper). As a direct consequence of this, the local structural conditions led to contrasted expressions of the late Variscan magmatism i.e. subaereal at Atienza and hypabyssal at Hiendelaencina.     

Reply to Molina-Garza et al. (2019) “Discussion of: Ortega-Flores et al. (2018) provenance analysis of Oligocene sandstone from the Cerro Pelón area,southern Gulf of Mexico”

ABSTRACT

The origin of the Oligocene turbidites from the Cerro Pelón area in south Gulf Mexico proposed by Ortega-Flores et al. (2018) is in disagree with the interpretations made by Molina-Garza et al. (2019), which main criticism is based on U-Pb ages of detrital zircons from the matrix of a conglomerate unit, which they refer to as ‘Nanchital Conglomerate’, as well as on the presence of limestone, gabbros, and mafic protolith-derived clasts. Molina-Garza et al. (2019) basically interpret the Nanchital Conglomerate as Miocene in age, which was sourced mainly from metamorphic complexes including their sedimentary covers located to the west and south of the Cerro Pelón area. For some reason, Molina-Garza et al. (2019) suppose that the Nanchital Conglomerate should have the same provenance sources that the Oligocene turbidites from Cerro Pelón area, reported by Ortega-Flores et al. (2018). Based on the foregoing, we strongly disagree with Molina-Garza et al. (2019) considering that, from the beginning, they intend to compare two units of different age. Additionally, the scarce data reported from both the matrix and the clasts of the Nanchital Conglomerate are not determinant for interpreting the provenance of this conglomeratic unit and subsequently, to consider the same rock sources from the Oligocene through Miocene time.     

Permeation of hydrogen through platinum: A re-evaluation of the data of Chou et al

The calculations of Chou et al. are revised to include effects that were neglected in the original work. The measured data are associated with permeability rather than diffusivity. The hydrogen concentration in the platinum membrane is assumed to be proportional to the square root of the hydrogen fugacity in the gas phase in conformity with experimental measurements at lower pressures. An approximate solution to the resulting mass transport equations is derived which simplifies the data analysis. The calculated permeabilities agree within experimental uncertainty with those determined by time lag experiments.     

闽浙赣中生代火山岩研究问题浅议--兼与郑承意等商榷

通过当前东南沿海(尤其福建、浙江、江西三省)中生代火山岩研究对比,作者对郑承意等论文(2004)提出商榷,并讨论一些新的研究进展和成果。     

一把开启复杂沉积现象的金钥匙——评乔秀夫等所著“地层中地震记录(古地震)”一书

已故的程裕淇院士曾说过一句话,是我永远也不能忘怀的。他说:“对于地质学家而言,地质记录永远是第一位的”。古今中外,许许多多有建树的、著名的地质学家,无不都是在历尽艰辛的野外工作中,尽一切可能详细地收集各种各样的地质记录,然后研究它并对其进行科学的、详细的解译,以重建地球的历史。从而,创立了自己的理论。     

Comment on “Comparison of Michigan Basin crude oils” by Vogler et al.

Data is presented for Michigan Basin oils that indicate, in addition to the three distinct oil types, oils of mixed composition, intermediate between the Silurian and Ordovician types, also exist. These mixed oils which occur in Devonian (Detroit River) reservoirs are identified primarily by their isoprenoid and normal paraffin compositions.