The Ancestral South Sandwich Arc (ASSA) has a short life-span of c.20 m.y. (Early Oligocene to Middle-Upper Miocene) before slab retreat and subsequent ‘resurrection’ as the active South Sandwich Island Arc (SSIA). The ASSA is, however, significant because it straddled the eastern margin of the Drake Passage Gateway where it formed a potential barrier to deep ocean water and mantle flow from the Pacific to Atlantic. The ASSA may be divided into three parts, from north to south: the Central Scotia Sea (CSS), the Discovery segment, and the Jane segment. Published age data coupled with new geochemical data (major elements, trace elements, Hf-Nd-Sr-Pb isotopes) from the three ASSA segments place constraints on models for the evolution of the arc and hence gateway development. The CSS segment has two known periods of activity. The older, Oligocene, period produced basic-acid, mostly calc-alkaline rocks, best explained in terms of subduction initiation volcanism of Andean-type (no slab rollback). The younger, Middle-Late Miocene period produced basic-acid, high-K calc-alkaline rocks (lavas and pyroclastic rocks with abundant volcanigenic sediments) which, despite being erupted on oceanic crust, have continental arc characteristics best explained in terms of a large, hot subduction flux most typical of a syn- or post-collision arc setting. Early-Middle Miocene volcanism in the Discovery and Jane arc segments is geochemically quite different, being typically tholeiitic and compositionally similar to many lavas from the active South Sandwich island arc front. There is indirect evidence for Western Pacific-type (slab rollback) subduction initiation in the southern part of the ASSA and for the back-arc basins (the Jane and Scan Basins) to have been active at the time of arc volcanism. Models for the death of the ASSA in the south following a series of ridge-trench collisions, are not positively supported by any geochemical evidence of hot subduction, but cessation of subduction by approach of progressively more buoyant oceanic lithosphere is consistent with both geochemistry and geodynamics. In terms of deep ocean water flow the early stages of spreading at the East Scotia Ridge (starting at 17-15 Ma) may have been important in breaking up the ASSA barrier while the subsequent establishment of a STEP (Subduction-Transform Edge Propagator) fault east of the South Georgia microcontinent (< 11 Ma) led to formation of the South Georgia Passage used by the Antarctic Circumpolar Current today. In terms of mantle flow, the subduction zone and arc root likely acted as a barrier to mantle flow in the CSS arc segment such that the ASSA itself became the Pacific-South Atlantic mantle domain boundary. This was not the case in the Discovery and Jane arc segments, however, because northwards flow of South Atlantic mantle behind the southern part of the ASSA gave an Atlantic provenance to the whole southern ASSA.
not many people have a good price to buy something, just as an integer, often there will be a number of different, the processing method for the zero sum nature will also be different. As a retail shop owner, in the operation, we can not treat customers too preoccupied, it is necessary to let, the send to send. Otherwise, it will make customers feel that we are too stingy, leaving a bad impression.
For example: some
customers to the store to buy a commodity total amount is 101 yuan, or 20.5 yuan, while stores still willing to accept a $5 and a fraction of the gross; some customers buy large amount of goods required to send one or two yuan of money store commodity but was rejected; and also because customers purchase goods have a plastic bag, and refuse to be the owner of the above phenomenon are likely to make customers happy, never willing to visit this shop. Therefore, the store will also lose, resulting in the loss of customers.
some time ago, I shop 200 meters away from a mahjong boss to my shop to buy a pack of "furongwang (hard)" and a "Liqun (new edition)". At that time, I felt a little puzzled: in her home next to the mahjong is not a big supermarket? Why would the boss detour ran to my shop to buy, not next to the supermarket. The customer lamented in his cigarettes and change when I said: "normally go to the next supermarket near the point, they would hate to see that virtue, not to do business, they are not doing business, this man is too stingy, never prosper!" After listening to the customer’s exclamation, I was surprised to ask: "sister-in-law, ah, how, why do you say that?"
said, angry, a few days ago, my husband in his supermarket to buy more than 160 yuan of goods, to the end of the money to pay for the home after the bottle opener is gone, let him give a bottle opener. Can the supermarket boss said to bottle a yuan of money, you say is not annoying? Buy one hundred or two hundred yuan of money to send a thing for such a small commodity, how is he saying the money, but my family goes to his home every day to buy a lot of supermarket goods, whether it is my need the goods, or playing mahjong, friends what to buy cigarettes, I went to his house to buy, one yuan is small but, reflect a person to do business will not do, reflect a person’s morality and quality.
there is a supermarket, he purchased a number of grapefruit, sell 10 money 3, I am afraid not good buy a try, next time you buy some delicious, if logically speaking, business people will only charge 3 yuan a, that is to say a grapefruit also only a few cents, and he charged me four yuan for one, it is not obvious to overcharge me? Moreover, every time I buy things 20 Fen Sanmao’s change I did not want him to find, but he was so stingy, so, after several times of experience, I was completely disappointed, do not want to go to his home supermarket to buy goods. Yesterday, I