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The Cenomanian-Turonian oceanic anoxic event (C/T OAE) is developed in southern Tibet. Organic geochemical study of the Cenomanian-Turonian sediments from the Gamba and Tingri areas shows that the mid-Cretaceous black shales in southern Tibet are enriched in organic carbon. The molecular analyses...
This study shows that the intrusive rocks distributed in the Aoyiqieke-Tamuqi area on the southern margin of the Tarim Block are composed of gabbro, diorite, granodiorite and granite, which constitute regionally a nearly EW-trending tectono-magmatic belt. Petrochemically the diorite, granodiorite...
Changjiang County is located to the northwest of the tailing range of the Wuzhi Mountains on Hainan Island, facing the sea and being against the Mountains. From southeast to northwest, it gradually descends in relief from mountain, hill, tableland, terrace to coastal plain. Its sandy coastal line...
Caledonian gold deposits are widely distributed in South China. They are developed in both South China Caledonian fold belt and adjacent Proterozoic Jiangnan uplift. The host rocks are Proterozoic metamorphosed microclastic rocks in the Jiangnan uplift and Proterozoic and Cambrian strata, as well...
The characteristics of inclusions in natural and synthetic gems are distinct owing to their different forming mechanisms and can be utilized to distinguish gems from different localities. In addition, intensive studies on inclusion characteristics of natural gems could identify their geographical...